CN209925071U

CN209925071U - Post-processor structure for adjusting back pressure

Info

Publication number: CN209925071U
Application number: CN201920584929.1U
Authority: CN
Inventors: 陈旭; 冯坦; 何胜勇; 许法亮; 向辉; 吕昌富; 胡国强; 赵金朋; 杜亚; 郜俊辉
Original assignee: Dongfeng Commercial Vehicle Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-01-10
Anticipated expiration: 2029-04-26

Abstract

The utility model provides an adjustment backpressure's aftertreatment ware structure, includes aftertreatment ware and the blast pipe that sets up on it, the blast pipe includes blast pipe and No. two blast pipes, aftertreatment ware includes oxidation catalyst converter DOC, and the one end of oxidation catalyst converter DOC communicates with each other with aftertreatment ware's intake pipe, and the other end of oxidation catalyst converter DOC communicates with each other with the one end of a blast pipe, and the other end of a blast pipe communicates with each other through the one end of a clamp with the exhaust butterfly valve, and the other end of exhaust butterfly valve communicates with each other through No. two clamps and No. two blast pipes, a blast pipe welding is on the aftertreatment ware. The design not only can adjust the exhaust back pressure and accurately control the exhaust back pressure when the whole vehicle is calibrated, but also has simple and convenient installation and disassembly and high structural strength.

Description

Post-processor structure for adjusting back pressure

Technical Field

The utility model relates to an engine exhaust purifies technical field, especially relates to a post processor structure of adjustment backpressure, mainly is applicable to the problem that can't adjust exhaust backpressure and can't accurate control exhaust backpressure when solving whole car calibration.

Background

In order to ensure that the exhaust emission of the engine meets the requirements of the national six-stage emission regulations, the aftertreatment system needs to calibrate the aftertreatment device by a rack and the whole vehicle. The aftertreatment device includes an oxidation catalyst DOC, a particulate trap DPF, and a selective catalytic reduction device SCR inside, which all contribute to an increase in exhaust gas backpressure. In the calibration process, a special sample is often adopted, for example, only an oxidation catalyst DOC is packaged in the postprocessor to calibrate the original machine soot emission of the engine, and the exhaust back pressure of the catalyst is smaller than that of the complete postprocessing because only one catalyst is packaged. Exhaust back pressure affects engine combustion and thus exhaust flow and raw NOx/PM emissions, so special calibration samples are required to have the same pressure drop as the pressure drop of a complete aftertreatment sample. The opening degree of a backpressure valve of the rack can be adjusted on the rack, and the backpressure on the whole vehicle cannot be adjusted. Therefore, the prior art has the following drawbacks: (1) the whole vehicle can not keep the same back pressure as the bench when being calibrated; (2) exhaust back pressure cannot be changed when the whole vehicle is calibrated, and the whole vehicle back pressure cannot be accurately evaluated.

Disclosure of Invention

The utility model aims at overcoming the defect and the problem that can't adjust exhaust back pressure and can't accurate control exhaust back pressure when whole car calibration that exists among the prior art, provide a post processor structure that can adjust exhaust back pressure and can accurate control exhaust back pressure when whole car calibration.

In order to achieve the above purpose, the technical solution of the utility model is that: the utility model provides an adjustment back pressure's aftertreatment ware structure, includes the aftertreatment ware and the blast pipe that sets up on it, the blast pipe includes blast pipe and No. two blast pipes, the one end of a blast pipe communicates with each other with the aftertreatment ware, and the other end of a blast pipe communicates with each other with the one end of exhaust butterfly valve, and the other end of exhaust butterfly valve communicates with each other with No. two blast pipes.

The exhaust pipe is communicated with the exhaust butterfly valve through a hoop.

No. two blast pipes communicate with the exhaust butterfly valve through No. two clamps.

The post-processor comprises an oxidation catalyst DOC, one end of the oxidation catalyst DOC is communicated with an air inlet pipe of the post-processor, and the other end of the oxidation catalyst DOC is communicated with a first exhaust pipe.

The first exhaust pipe is welded on the post processor.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model relates to a post-processor structure for adjusting back pressure, wherein the exhaust pipe comprises a first exhaust pipe and a second exhaust pipe, one end of the first exhaust pipe is communicated with the post-processor, the other end of the first exhaust pipe is communicated with one end of an exhaust butterfly valve, and the other end of the exhaust butterfly valve is communicated with the second exhaust pipe; when the whole vehicle is calibrated, the pressure drop of the post-processor on the whole vehicle can be adjusted by adjusting the opening of the exhaust butterfly valve, and the exhaust back pressure of the whole vehicle can be accurately controlled. Therefore, the utility model discloses not only can adjust exhaust backpressure, can accurate control exhaust backpressure moreover.

2. In the post-processor structure for adjusting back pressure, the first exhaust pipe is communicated with the exhaust butterfly valve through the first clamp, and the second exhaust pipe is communicated with the exhaust butterfly valve through the second clamp, so that the post-processor structure is simple and convenient to mount and dismount due to the design; the exhaust pipe I is welded on the post processor, so that the exhaust pipe is simple and convenient to mount and high in structural strength. Therefore, the utility model discloses the installation is simple and convenient, structural strength is high with the dismantlement.

Drawings

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

In the figure: aftertreatment ware 1, exhaust pipe 2, No. two exhaust pipes 3, exhaust butterfly valve 4, No. one clamp 5, No. two clamps 6.

Detailed Description

The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.

Referring to fig. 1, a post-processor structure for adjusting back pressure comprises a post-processor 1 and an exhaust pipe arranged on the post-processor 1, wherein the exhaust pipe comprises a first exhaust pipe 2 and a second exhaust pipe 3, one end of the first exhaust pipe 2 is communicated with the post-processor 1, the other end of the first exhaust pipe 2 is communicated with one end of an exhaust butterfly valve 4, and the other end of the exhaust butterfly valve 4 is communicated with the second exhaust pipe 3.

No. 2 blast pipes are through a

clamp

5 and 4 intercommunications of exhaust butterfly valve.

No. two blast pipes 3 are through No. two

clamps

6 and 4 intercommunications of exhaust butterfly valve.

The aftertreatment ware 1 includes oxidation catalyst converter DOC, the one end of oxidation catalyst converter DOC communicates with each other with the intake pipe of aftertreatment ware 1, and the other end and the blast pipe 2 of a number of exhaust pipe of oxidation catalyst converter DOC communicate with each other.

The first exhaust pipe 2 is welded on the post processor 1.

The principle of the utility model is explained as follows:

the design is applied to the post processor in the development stage of the whole vehicle, and aims to solve the problems that the exhaust back pressure cannot be adjusted and accurately controlled during calibration of the whole vehicle.

The specific working process of the design is as follows:

when the post-processor is a special calibration sample, the sample is moved to a rack, the pressure drop of the post-processor is 22kpa by adjusting the opening of an exhaust butterfly valve under the working condition that the post-processor runs to 0.5kg/s and 450 ℃, so that the pressure drop of the special calibration sample and the pressure drop of a complete post-processing sample can be ensured to be the same, and the calibration effectiveness of the whole vehicle can be ensured.

Therefore, the design can ensure that the pressure drop of the post-processor can be adjusted on the whole vehicle, and the exhaust back pressure of the whole vehicle can be accurately controlled.

Example 1:

Example 2:

the basic contents are the same as example 1, except that:

referring to fig. 1, the first exhaust pipe 2 is communicated with an exhaust butterfly valve 4 through a first clamp 5; the second exhaust pipe 3 is communicated with the exhaust butterfly valve 4 through a second hoop 6; the first exhaust pipe 2 is welded on the post processor 1.

Example 3:

the basic contents are the same as example 1, except that:

referring to fig. 1, the post-processor 1 includes an oxidation catalyst DOC, one end of the oxidation catalyst DOC is communicated with an intake pipe of the post-processor 1, and the other end of the oxidation catalyst DOC is communicated with a first exhaust pipe 2.

Claims

1. The utility model provides an adjustment back pressure's aftertreatment ware structure, includes aftertreatment ware (1) and the blast pipe that sets up on it, its characterized in that: the exhaust pipe comprises a first exhaust pipe (2) and a second exhaust pipe (3), one end of the first exhaust pipe (2) is communicated with the postprocessor (1), the other end of the first exhaust pipe (2) is communicated with one end of an exhaust butterfly valve (4), and the other end of the exhaust butterfly valve (4) is communicated with the second exhaust pipe (3).

2. The backpressure regulating aftertreatment structure of claim 1, wherein: the exhaust pipe (2) is communicated with the exhaust butterfly valve (4) through a hoop (5).

3. The backpressure regulating aftertreatment structure of claim 1, wherein: no. two blast pipes (3) are through No. two clamps (6) and exhaust butterfly valve (4) intercommunication.

4. The backpressure regulating aftertreatment structure of claim 1, wherein: the aftertreatment device (1) comprises an oxidation catalyst DOC, one end of the oxidation catalyst DOC is communicated with an air inlet pipe of the aftertreatment device (1), and the other end of the oxidation catalyst DOC is communicated with a first exhaust pipe (2).

5. The backpressure regulating aftertreatment structure of claim 1, wherein: the first exhaust pipe (2) is welded on the post-processor (1).