CN215109106U

CN215109106U - Box aftertreatment tail pipe structure of commercial car

Info

Publication number: CN215109106U
Application number: CN202120315637.5U
Authority: CN
Inventors: 滕继弘; 杨小东; 齐冬亮; 赵宁; 张文文
Original assignee: Wuxi Weifu Lida Catalytic Converter Co Ltd
Current assignee: Wuxi Weifu Lida Catalytic Converter Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-12-10
Anticipated expiration: 2031-02-03

Abstract

The utility model relates to a box-type post-processing tail pipe structure of a commercial vehicle, which comprises a post-processing tail pipe, a first connecting flange, a second connecting flange, a flange gasket, a post-processing end cover and an end cover outlet pipe; the end cover air outlet pipe extends out of the post-treatment end cover and is welded and fixed with the post-treatment end cover; the outer end of the end cover air outlet pipe is fixedly welded with the second connecting flange; the post-treatment tail pipe is welded and fixed with the first connecting flange; a flange gasket is arranged between the first connecting flange and the second connecting flange and is connected through a bolt; the method is characterized in that: and a plurality of stamping folding angles extend from the flange gasket to the direction vertical to the post-treatment end cover, and the welding surface of each stamping folding angle is welded and fixed with the plane of the post-treatment end cover. The utility model provides the high intensity of whole aftertreatment tail pipe has shared because the cantilever beam structure and the great stress that produces in welding seam department.

Description

Box aftertreatment tail pipe structure of commercial car

Technical Field

The utility model relates to a box aftertreatment tail pipe structure of commercial car belongs to car box technical field.

Background

With increasingly stringent emissions regulations, the importance of aftertreatment in commercial vehicles is increasing. The overall aftertreatment structure is also increasingly complex in order to meet upgraded emissions standards. The box type aftertreatment is a common commercial vehicle aftertreatment structure and comprises a box body, an air inlet pipe, a tail pipe and the like. The tail pipe is mainly used for discharging the treated automobile exhaust into the atmosphere.

In some structures, the tail pipe is directly inserted into the end cover of the box body for welding, the structure is similar to a cantilever beam structure, and the welding position of the end cover and the tail pipe has large stress. And because the engine needs to be connected with the parts of suppliers, the connection effect can be achieved through the two flanges, and the weight of the flanges is larger, so that the stress of the root is further increased, and the fatigue fracture is easy to occur under severe working conditions. The solution is to add a welding patch and a welding support plate, and the effect is not obvious.

Disclosure of Invention

An object of the utility model is to overcome the not enough of existence among the prior art, provide a box aftertreatment tail pipe structure of commercial car, improved the intensity of whole aftertreatment tail pipe, shared because the cantilever beam structure and in the great stress of welding seam department production.

According to the utility model provides a technical scheme: a box type post-processing tail pipe structure of a commercial vehicle comprises a post-processing tail pipe, a first connecting flange, a second connecting flange, a flange gasket, a post-processing end cover and an end cover air outlet pipe; the end cover air outlet pipe extends out of the post-treatment end cover and is welded and fixed with the post-treatment end cover; the outer end of the end cover air outlet pipe is fixedly welded with the second connecting flange; the post-treatment tail pipe is welded and fixed with the first connecting flange; a flange gasket is arranged between the first connecting flange and the second connecting flange and is connected through a bolt; the method is characterized in that: and a plurality of stamping folding angles extend from the flange gasket to the direction vertical to the post-treatment end cover, and the welding surface of each stamping folding angle is welded and fixed with the plane of the post-treatment end cover.

Furthermore, the bending part of the stamping bevel is a round angle and is in smooth transition.

Further, the width of the stamping bevel is shorter than the width of the plane of the flange gasket.

Furthermore, the flange gasket is quadrilateral, and three edges of the flange gasket are respectively provided with a stamping bevel.

Compared with the prior art, the utility model, have following advantage:

the utility model discloses a structure with the flange gasket changes, will only play the gasket increase punching press angle of connection effect originally to weld with the aftertreatment end cover, improved the intensity of whole aftertreatment tail pipe, shared because the cantilever beam structure and in the great stress of welding seam department production. In the process, reinforcing structures such as patches, supporting plates and the like are omitted, and the process flow is simplified.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 and 3 show the flange gasket with the punched bevel of the present invention.

Description of reference numerals: 1-post-treatment tail pipe, 2-first connecting flange, 3-second connecting flange, 4-flange gasket, 5-post-treatment end cover, 6-end cover air outlet pipe and 7-stamping bevel.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, a box-type post-treatment tail pipe structure of a commercial vehicle comprises a post-treatment tail pipe 1, a first connecting flange 2, a second connecting flange 3, a flange gasket 4, a post-treatment end cover 5 and an end cover air outlet pipe 6; the end cover air outlet pipe 6 extends out of the post-treatment end cover 5 and is welded and fixed with the post-treatment end cover 5; the outer end of the end cover air outlet pipe 6 is fixedly welded with the second connecting flange 3; the post-treatment tail pipe 1 is welded and fixed with the first connecting flange 2; a flange gasket 4 is arranged between the first connecting flange 2 and the second connecting flange 3 and is connected with the first connecting flange and the second connecting flange through bolts; the flange gasket 4 extends a plurality of stamping folding angles 7 towards the direction vertical to the post-processing end cover 5, and the welding surface of the stamping folding angles 7 is welded and fixed with the plane of the post-processing end cover 5.

As shown in fig. 2 and 3, the bending part of the stamping bevel 7 is a round corner with smooth transition. The width of the stamped bevel 7 is shorter than the width of the plane of the flange gasket 4. The flange gasket 4 is quadrilateral, and three edges of the flange gasket 4 are respectively provided with a stamping bevel 7.

The use process comprises the following steps: an end cover outlet pipe 6 extends out of the post-treatment end cover 5 and is fixedly connected through welding to the post-treatment end cover 5. Second flange 3 is connected with end cover outlet duct 6 through the welding this moment again, will guarantee that the welding between end cover outlet duct 6, aftertreatment end cover 5, the second flange 3 does not have the rosin joint and leaks the welding, prevents aftertreatment gas leakage.

The flange gasket 4 is provided with three stamping folding angles 7 in three directions perpendicular to the aftertreatment end cover 5 under the original plane structure, and the width of each stamping edge is shorter than the width of the plane of the flange gasket 4 so as to ensure that the stamping angles cannot deform. And the punched bent corners are rounded and smoothly transited.

Then, the inner surface of the flange gasket 4 with the press dog-ears 7 is attached to the outer surface of the second connecting flange 3, and the axes of the four bolt holes are aligned and overlapped.

The welding surfaces of the three stamping bevel angles 7 of the flange gasket 4 are attached to the plane of the post-processing end cover 5, the welding gaps are ensured, and then welding is carried out for 270 degrees along three edges respectively. At this point, the flange gasket 4 has completed its welded attachment to the aftertreatment end cap 5.

And finally, welding the post-treatment tail pipe 1 with the connecting flange 2, and completing bolt connection through a bolt hole of the connecting flange. After the completion, the airtightness and the welding quality were checked again.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A box-type post-treatment tail pipe structure of a commercial vehicle comprises a post-treatment tail pipe (1), a first connecting flange (2), a second connecting flange (3), a flange gasket (4), a post-treatment end cover (5) and an end cover air outlet pipe (6); the end cover air outlet pipe (6) extends out of the post-treatment end cover (5) and is welded and fixed with the post-treatment end cover (5); the outer end of the end cover air outlet pipe (6) is fixedly welded with the second connecting flange (3); the post-treatment tail pipe (1) is welded and fixed with the first connecting flange (2); a flange gasket (4) is arranged between the first connecting flange (2) and the second connecting flange (3) and is connected through bolts; the method is characterized in that: the flange gasket (4) extends a plurality of stamping folding angles (7) in the direction perpendicular to the post-processing end cover (5), and the welding surface of each stamping folding angle (7) is welded and fixed with the plane of the post-processing end cover (5).

2. The box type after-treatment tail pipe structure of commercial vehicles according to claim 1, characterized in that the bending part of the stamping bevel (7) is round and smooth transition.

3. The box type aftertreatment tailpipe structure of commercial vehicles according to claim 1, characterized in that the width of the punched dog-ear (7) is shorter than the width of the plane of the flange gasket (4).

4. The box type after-treatment tail pipe structure of commercial vehicles according to claim 1, characterized in that the flange gasket (4) is quadrilateral, and three edges of the flange gasket (4) are respectively provided with a stamping bevel (7).