CN208416654U - U-shaped exhaust gas post-treatment device - Google Patents

Abstract

A kind of U-shaped exhaust gas post-treatment device comprising the first aftertreatment assembly, the second aftertreatment assembly, third aftertreatment assembly and electric hybrid module.The electric hybrid module includes mixing arrangement and attachment device.The mixing arrangement includes shell, mixing tube and the peripheral partition for being fixed on the mixing tube, and the mixing tube is equipped with two first openings for being located at its two sides；The mixing arrangement further includes the first, second shield blocked respectively in first open front, so that the exhaust stream of the overwhelming majority, which needs to get around first, second shield just, can enter in first opening；The mixing arrangement further includes broken and evaporation the fine fibre element in the mixing tube to further increase urea droplets.So set, improving the uniformity of air-flow mixing, Crystallization is improved.

Description

U-shaped exhaust gas post-treatment device

Technical field

The utility model relates to a kind of U-shaped exhaust gas post-treatment devices, belong to engine exhaust post-processing technology field.

Background technique

Research shows that ammonia distribution in exhaust after treatment system (such as selective catalytic reduction system operating, SCR system) pipeline Uniformity coefficient has important influence to the overall performance and endurance quality of system.If ammonia (NH₃) be unevenly distributed and will lead to Oxynitrides (NOx) transformation efficiency is too low, easily causes ammonia to let out if increasing urea injecting quantity to meet emission performance Leakage pollution.Urea droplets are easy deposition when touching the lower wall surface of temperature simultaneously, formed crystallization it is serious when can block exhaust It manages, engine power performance is caused to decline.The mixing uniformity for improving ammonia molecule can effectively improve urea desorption column, reduce Urea injecting quantity is to reduce the risk of urea crystals.

Therefore, it is necessary to provide a kind of exhaust gas post-treatment device that can be improved ammonia molecular mixing uniformity to solve on State technical problem.

Utility model content

The purpose of this utility model is to provide the rows that one kind can be such that the exhaust of engine is uniformly mixed with urea droplets Gas after-treatment device.

To achieve the above objectives, the present invention adopts the following technical solutions: a kind of U-shaped exhaust gas post-treatment device, packet Include the first aftertreatment assembly, positioned at first aftertreatment assembly downstream and be connected with first aftertreatment assembly Two aftertreatment assemblies, the third aftertreatment assembly being arranged side by side with first, second aftertreatment assembly and it connect described The electric hybrid module of two aftertreatment assemblies and the third aftertreatment assembly；Wherein after first aftertreatment assembly and described second Processing component is mutually aligned and is arranged in first straight line；The third aftertreatment assembly is arranged in second straight line；It is described mixed Seaming element include be connected to second aftertreatment assembly downstream and be located at the first straight line on mixing arrangement and will The attachment device that the mixing arrangement and the third aftertreatment assembly connect；The mixing arrangement includes shell, is located at The intracorporal mixing tube of the shell and be fixed on the mixing tube periphery partition, the partition by the shell be separated into The first space and the second space being connected with the attachment device that second aftertreatment assembly is connected；The mixing Pipe includes the first pipe portion in first space and the second pipe portion in the second space, wherein described the One pipe portion is equipped at least two first openings for being located at its two sides；The mixing arrangement further includes being blocked respectively described The first shield and the second shield of one open front hide so that the exhaust stream of the overwhelming majority needs to get around described first, second Plate can just enter in first opening；The mixing arrangement further includes the fine fibre element in the mixing tube, Described in fine fibre element passed through with for the exhaust and urea droplets, to further increase the broken of the urea droplets And evaporation；The attachment device includes the first opening being connected with the second space and the third aftertreatment assembly Second to be connected is open and is connected to the inner chamber body of first opening and second opening.

As the further improved technical solution of the utility model, the fine fibre element is steel wool, the steel wool It is fixed in the mixing tube by soldering.

As the further improved technical solution of the utility model, the shell includes the installation to install urea nozzle Seat, urea droplets of the urea nozzle to the jet atomization into the mixing tube.

As the further improved technical solution of the utility model, the partition is substantially Z-shape, and the partition includes being located at First plate of the mixing tube side, the second plate positioned at the mixing tube other side and connection first plate with The third plate of second plate, the third plate are equipped with the through-hole passed through for the mixing tube.

As the further improved technical solution of the utility model, the partition includes the two boards fitted together, In the stitching portion of this two boards be located on the third plate.

As the further improved technical solution of the utility model, first plate is equipped with and sticks on second pipe portion On the first arcwall face, second plate, which is equipped with, sticks on the second arcwall face in first pipe portion.

As the further improved technical solution of the utility model, the mixing arrangement includes being fixed on the mixing tube Cowling panel, first shield and the second shield are located at the two sides of the cowling panel.

As the further improved technical solution of the utility model, the cowling panel includes sticking in first pipe portion Third arcwall face, first shield and the second shield extend from the third arc towards two sides respectively.

As the further improved technical solution of the utility model, first shield is equipped with and sticks on the case inside The first arc-shaped edges, second shield, which is equipped with, sticks on the second arc-shaped edges of the case inside.

As the further improved technical solution of the utility model, first aftertreatment assembly includes diesel oil oxidation catalysis Agent, second aftertreatment assembly includes diesel particulate trap, and the third aftertreatment assembly includes selective catalytic reduction Agent.

Compared to the prior art, the utility model is by setting mixing arrangement, increase Urea Evaporation away from discrete time, The uniformity for improving air-flow mixing, improves Crystallization.

Detailed description of the invention

Fig. 1 is the stereoscopic schematic diagram of the utility model U-shaped exhaust gas post-treatment device.

Fig. 2 is the part isometric exploded view of Fig. 1.

Fig. 3 is the stereoscopic schematic diagram of mixing arrangement in Fig. 2.

Fig. 4 is the part isometric exploded view of Fig. 3.

Fig. 5 is the further stereogram exploded view of Fig. 4.

Specific embodiment

It please join shown in Fig. 1 to Fig. 5, the utility model discloses a kind of U-shaped exhaust gas post-treatment device 500 comprising first Aftertreatment assembly 100, positioned at first aftertreatment assembly 100 downstream and be connected with first aftertreatment assembly 100 The second aftertreatment assembly 200, the third aftertreatment assembly that is arranged side by side with first, second aftertreatment assembly 100,200 300 and connection second aftertreatment assembly 200 and the third aftertreatment assembly 300 electric hybrid module 400；Wherein institute The first aftertreatment assembly 100 is stated to be mutually aligned and be arranged in first straight line with second aftertreatment assembly 200；The third Aftertreatment assembly 300 is arranged in second straight line.

In the utility model embodiment illustrated, first aftertreatment assembly 100 includes diesel oxidation catalyst (DOC), second aftertreatment assembly 200 includes diesel particulate trap (DPF), and the third aftertreatment assembly 300 includes Selective catalytic reducing agent (SCR).

The electric hybrid module 400 includes being connected to the downstream of second aftertreatment assembly 200 and being located at described first directly Mixing arrangement 1 on line and the attachment device 2 for connecting the mixing arrangement 1 with the third aftertreatment assembly 300.

The mixing arrangement 1 includes shell 11, the mixing tube 12 in the shell 11 and is fixed on the mixing The partition 13 of the periphery of pipe 12.The shell 11 is separated by the partition 13 to be connected with second aftertreatment assembly 200 The first space 14 and the second space 15 that is connected with the attachment device 2.The mixing tube 12 includes being located at described the The first pipe portion 121 in one space 14 and the second pipe portion 122 in the second space 15, wherein first pipe portion 121 are equipped at least two first openings 1211 for being located at its two sides；The mixing arrangement 1 further includes being blocked respectively described The first shield 161 and the second shield 162 of first 1211 front ends of opening, so that the exhaust stream of the overwhelming majority needs described in bypass First, second shield 161,162 can just enter in first opening 1211；It is directly rushed so set, avoiding exhaust stream Enter in mixing tube 12 and form reflection on tube wall, influences the uniformity and stationarity of air-flow mixing.The mixing arrangement 1 also wraps The fine fibre element 17 being located in the mixing tube 12 is included, wherein the fine fibre element 17 is with for the exhaust and urea Drop passes through, to further increase the broken and evaporation of the urea droplets.In the utility model embodiment illustrated, institute Stating fine fibre element 17 is steel wool, and the steel wool is fixed in the mixing tube 12 by soldering.

Specifically, the mixing arrangement 1 includes the cowling panel 16 being fixed on the mixing tube 12, first shield 161 and second shield 162 be located at the two sides of the cowling panel 16.In the utility model embodiment illustrated, institute Stating cowling panel 16 includes the third arcwall face 163 sticked in first pipe portion 15, and first shield 161 and second hides Plate 162 extends from the third arcwall face 163 to two sides respectively.Preferably, the third arcwall face 163 is welded on described In first pipe portion 15.First shield 161 is equipped with the first arc-shaped edges 1611 for sticking on 11 inside of the shell, and described second Shield 162 is equipped with the second arc-shaped edges 1621 for sticking on 11 inside of shell, is formed and is hindered to play the effect of rectification to air-flow Fruit.

The partition 13 include positioned at 12 side of mixing tube the first plate 131, be located at the mixing tube 12 it is another The third plate 133 of second plate 132 of side and connection first plate 131 and second plate 132, the third Plate 133 is equipped with the through-hole 134 passed through for the mixing tube 12.In the utility model embodiment illustrated, the mixing Pipe 12 is arranged vertically；First plate 131 extends vertically with second plate 132 and extending direction is on the contrary, described the Three plates, 133 horizontal extension.The partition 13 is substantially Z-shape, and first plate 131 is equipped with and sticks on second pipe portion The first arcwall face 1311 on 122, second plate 132 are equipped with the second arcwall face sticked in first pipe portion 121 1321。

It please join shown in Fig. 4 and Fig. 5, in the utility model embodiment illustrated, the partition 13 includes being assembled in one The two boards risen, wherein the stitching portion of this two boards is located on the third plate 133.So set, being reduced convenient for manufacture Cost.

The shell 11 includes spraying into institute to install the mounting base 10 of urea nozzle with the urea liquid after being atomized It states in mixing tube 12.

The attachment device 2 includes that the first opening 21 being connected with the second space 15 and the third post-process The inner chamber body 23 of the second opening 22 and connection first opening 21 and second opening 22 that component 300 is connected.? In other embodiments, in order to further enhance the mixed performance of the utility model U-shaped exhaust gas post-treatment device 500, Ke Yi Hybrid element is set in the inner chamber body 23.

The U-shaped exhaust gas post-treatment device 500 of the utility model has relatively small space, to be conducive to the cloth of system It sets.In addition, by setting mixing arrangement 1, increase Urea Evaporation away from discrete time, improve the uniformity of air-flow mixing, Improve Crystallization.

It should be noted that orientation described in the utility model should not do the understanding limited to, because according to element The difference of placement position, these positional relationships should also be as carrying out adaptability understanding.In addition, above embodiments are merely to illustrate this reality Technical solution described in the utility model not is limited with novel, understanding of this description should be with technical field Technical staff based on.Although this specification has been carried out detailed description to the utility model referring to the above embodiments, But those skilled in the art should understand that, person of ordinary skill in the field still can be to the utility model It is modified or replaced equivalently, and the technical solution and its improvement of all spirit and scope for not departing from the utility model, It should cover in the scope of the claims of the utility model.

Claims (10)

1. a kind of U-shaped exhaust gas post-treatment device comprising the first aftertreatment assembly, positioned at the downstream of first aftertreatment assembly And be connected with first aftertreatment assembly the second aftertreatment assembly, with first, second aftertreatment assembly and arrange The electric hybrid module of the third aftertreatment assembly and connection second aftertreatment assembly and the third aftertreatment assembly set； Wherein first aftertreatment assembly and second aftertreatment assembly are mutually aligned and are arranged in first straight line；The third Aftertreatment assembly is arranged in second straight line；It is characterized by: the electric hybrid module includes being connected to the second post-processing group The downstream of part and the mixing arrangement being located in the first straight line and by the mixing arrangement and the third aftertreatment assembly The attachment device connected；The mixing arrangement includes shell, positioned at the intracorporal mixing tube of the shell and is fixed on described The partition of the periphery of mixing tube, it is empty that the shell is separated into first to be connected with second aftertreatment assembly by the partition Between and the second space that is connected with the attachment device；The mixing tube includes the first pipe in first space Portion and the second pipe portion in the second space, wherein first pipe portion, which is equipped with, is located at least the two of its two sides A first opening；The mixing arrangement further includes blocking to hide in the first shield of first open front and second respectively Plate, so that the exhaust stream of the overwhelming majority, which needs to get around first, second shield just, can enter in first opening；It is described Mixing arrangement further includes the fine fibre element in the mixing tube, wherein the fine fibre element with for the exhaust with And urea droplets pass through, to further increase the broken and evaporation of the urea droplets；The attachment device include with it is described The first opening that second space is connected, second to be connected with the third aftertreatment assembly are open and are connected to described first The inner chamber body of opening and second opening.

2. U-shaped exhaust gas post-treatment device as described in claim 1, it is characterised in that: the fine fibre element is steel wool, institute Steel wool is stated to be fixed in the mixing tube by soldering.

3. U-shaped exhaust gas post-treatment device as described in claim 1, it is characterised in that: the shell includes to install urea The mounting base of nozzle, urea droplets of the urea nozzle to the jet atomization into the mixing tube.

4. U-shaped exhaust gas post-treatment device as described in claim 1, it is characterised in that: the partition is substantially Z-shape, it is described every Plate includes described in the first plate positioned at the mixing tube side, the second plate positioned at the mixing tube other side and connection The third plate of first plate and second plate, the third plate are equipped with the through-hole passed through for the mixing tube.

5. U-shaped exhaust gas post-treatment device as claimed in claim 4, it is characterised in that: the partition includes fitting together Two boards, wherein the stitching portion of this two boards is located on the third plate.

6. U-shaped exhaust gas post-treatment device as claimed in claim 5, it is characterised in that: first plate is equipped with and sticks on institute The first arcwall face in the second pipe portion is stated, second plate is equipped with the second arcwall face sticked in first pipe portion.

7. U-shaped exhaust gas post-treatment device as described in claim 1, it is characterised in that: the mixing arrangement includes being fixed on institute The cowling panel on mixing tube is stated, first shield and the second shield are located at the two sides of the cowling panel.

8. U-shaped exhaust gas post-treatment device as claimed in claim 7, it is characterised in that: the cowling panel is described including sticking on Third arcwall face in first pipe portion, first shield and the second shield extend from the third arc towards two sides respectively It forms.

9. U-shaped exhaust gas post-treatment device as described in claim 1, it is characterised in that: first shield is equipped with and sticks on institute The first arc-shaped edges of case inside are stated, second shield is equipped with the second arc-shaped edges for sticking on the case inside.

10. U-shaped exhaust gas post-treatment device as described in claim 1, it is characterised in that: first aftertreatment assembly includes bavin Oily oxidation catalyst, second aftertreatment assembly includes diesel particulate trap, and the third aftertreatment assembly includes selection Property catalytic reducer.