CN208122931U - Box-type exhaust post-treatment apparatus of engine - Google Patents

Abstract

A kind of box-type exhaust post-treatment apparatus of engine comprising shell, several aftertreatment assemblies and cavity components.The shell includes first end cover, first baffle, second baffle, second end cover and shell.The first space is formed between the first end cover and the first baffle, the shell includes the exhaust inlet pipe being connected with first space.The cavity components include mixing tube and air-flow mixing arrangement, and the mixing tube includes inner chamber body, the peripheral and circumferentially distributed several fins for being centered around the inner chamber body, corresponding to several fins and several flutings being connected to the inner chamber body and the antipriming pipe in the mixing tube.The air-flow mixing arrangement is located at the downstream of the antipriming pipe.Compared to the prior art, the utility model enhances the broken and heat transfer effect between wall surface of urea, to reduce the risk of urea crystals by setting antipriming pipe and air-flow mixing arrangement.

Description

Box-type exhaust post-treatment apparatus of engine

Technical field

The utility model relates to a kind of box-type exhaust post-treatment apparatus of engine.

Background technique

Box-type exhaust post-treatment apparatus of engine (such as diesel engine exhausting after-treatment device) be primarily used to processing or Toxic and harmful substance device in evolution exhaust.Harmful toxic matter in exhaust mainly includes hydrocarbon, carbon monoxide, nitrogen Oxide and particulate matter etc..

Have in the prior art using diesel oxidation catalyst (DOC), diesel particulate trap (DPF) and selectivity The scheme that catalytic reducer (SCR) is combined improves the efficiency of vent gas treatment.In a kind of scheme, the oxidized form catalysis turns Parallel operation and grain catcher are arranged in series in first shell, and the first cavity being connected to the first shell is in addition arranged； The selective catalytic reducing agent is arranged in second shell, and the second cavity being connected to the second shell is in addition arranged； Then first, second cavity is together in series by connecting pipe.Exhaust and urea droplets are mixed in connecting pipe, Mixture subsequently enters the second cavity, then by selective catalytic reducing agent, to reduce harmful substance.However, exhaust and urea The mixture of drop is unevenly distributed, and then cannot make mixture uniformly by the selectivity after entering the second cavity Catalytic reducer, it reduce treatment effeciencies.

Utility model content

The purpose of this utility model is to provide one kind, and exhaust can be made to realize more uniform mixed cabinet with urea liquid Formula exhaust post-treatment apparatus of engine.

To achieve the above object, the utility model adopts the following technical solution：A kind of box-type engine exhaust post-processing Device comprising shell, positioned at the intracorporal several aftertreatment assemblies of the shell and by the aftertreatment assembly connection get up Cavity components, the shell include first end cover, first baffle, second baffle, second end cover and are wrapped in described first, The shell they two baffles periphery and be fixed together with first, second end cap；The first end cover and the first baffle it Between be formed with the first space, the shell includes the exhaust inlet pipe being connected with first space；Several post-processings Component includes the first aftertreatment assembly being at least partially disposed between first, second baffle and the first post-processing group Part alignment and the second interconnected aftertreatment assembly and be arranged side by side with first, second aftertreatment assembly two the Three aftertreatment assemblies；The first baffle is equipped with first that first aftertreatment assembly is connected with first space and opens Hole；It is formed with second space between the second end cover and the second baffle, the second baffle is equipped with will be after described second The second aperture and the third being connected with corresponding third aftertreatment assembly that processing component and the second space are connected Aperture；The cavity components include first cavity components of the clasp in second aperture, with the first cavity components phase The mixer tube assembly of connection and the second cavity the mixer tube assembly to be connected with the third aftertreatment assembly Component；The mixer tube assembly includes mixing tube and air-flow mixing arrangement, the mixing tube include inner chamber body, be centered around it is described Peripheral and circumferentially distributed several fins of inner chamber body, be connected to corresponding to several fins and with the inner chamber body it is several Fluting and the antipriming pipe in the mixing tube；The air-flow mixing arrangement is located at the downstream of the antipriming pipe.

As the further improved technical solution of the utility model, the exhaust inlet pipe against and be fixed on described first On baffle, the exhaust inlet pipe is equipped with several gas vents being connected to first space on the peripheral wall；The shell is also Including the exhaust exit pipe being connected with the second space.

As the further improved technical solution of the utility model, the second baffle is equipped with perforative through-hole, described mixed It closes pipe and vacantly passes through the through-hole, the fin at least partly extends beyond the second baffle.

As the further improved technical solution of the utility model, the mixer tube assembly includes being located at the second baffle And corresponding to the sleeve part of the through-hole, the sleeve part is equipped with the extended cavity, and the fin is at least partially disposed at the expansion It opens up in chamber.

As the further improved technical solution of the utility model, first aftertreatment assembly includes diesel oil oxidation catalysis Agent and the first perforated distributor positioned at the upstream of the diesel oxidation catalyst；Second aftertreatment assembly includes diesel oil Grain catcher；The third aftertreatment assembly includes selective catalytic reducing agent.

As the further improved technical solution of the utility model, the box-type exhaust post-treatment apparatus of engine includes It is fixed on the second end cover and the mounting portion to install urea nozzle, the urea nozzle is into the antipriming pipe Spray urea droplets.

As the further improved technical solution of the utility model, second cavity components include connecting with the mixing tube Logical interstitial hole and two connecting holes positioned at the interstitial hole two sides, the connecting hole and corresponding third aftertreatment assembly It is connected.

As the further improved technical solution of the utility model, the air-flow mixing arrangement includes being fixed on the mixing Mixer in pipe, the mixer include cylindrical portion and several spoilers for being fixed in the cylindrical portion.

As the further improved technical solution of the utility model, the air-flow mixing arrangement includes being located at second chamber The diffuser being connected in body component and with the mixing tube, the diffuser are equipped with several diffusions being distributed on its circumference Hole.

As the further improved technical solution of the utility model, the air-flow mixing arrangement includes being located at second chamber The bowl cover being aligned in body component and with the mixing tube, the bowl are provide with the spherical that the oriented mixing tube protrudes out.

As the further improved technical solution of the utility model, the air-flow mixing arrangement includes being located at second chamber The end bowl being aligned in body component and with the mixing tube, the end bowl are equipped with to receive the bearing space of air-flow and protrude into Spherical in the bearing space.

As the further improved technical solution of the utility model, the air-flow mixing arrangement includes being located at second chamber The diffuser that is connected in body component and with the mixing tube and be located in second cavity components and with the mixing tube The end bowl of alignment, the diffuser are equipped with several diffusion holes being distributed on its circumference；The end bowl is equipped with to receive air-flow Bearing space and protrude into spherical in the bearing space.

As the further improved technical solution of the utility model, the air-flow mixing arrangement includes being fixed on the mixing Mixer in pipe, the mixer are located at the upstream of the diffuser and including cylindrical portion and are fixed in the cylindrical portion Several spoilers.

Compared to the prior art, the utility model is mixed by the way that antipriming pipe is arranged with air-flow mixing arrangement twice, is increased The strong broken and heat transfer effect between wall surface of urea, to reduce the risk of urea crystals.

Detailed description of the invention

Fig. 1 is the stereoscopic schematic diagram of the utility model box-type exhaust post-treatment apparatus of engine.

Fig. 2 is the stereoscopic schematic diagram of another angle of Fig. 1.

Fig. 3 is the stereogram exploded view of Fig. 1.

Fig. 4 is the stereogram exploded view of another angle of Fig. 3.

Fig. 5 is the stereoscopic schematic diagram removed in Fig. 2 after the first, second end cap.

Fig. 6 is the stereoscopic schematic diagram of another angle of Fig. 5.

Fig. 7 is the main view of Fig. 1.

Fig. 8 is the top view of Fig. 1.

Fig. 9 is the bottom view of Fig. 1.

Figure 10 is the left view of Fig. 1.

Figure 11 is the right view of Fig. 1.

Figure 12 is the stereoscopic schematic diagram removed in Fig. 6 after first end cover.

Figure 13 is the stereoscopic schematic diagram removed in Figure 12 after first baffle.

Figure 14 is the stereoscopic schematic diagram removed in Figure 13 after shell.

Figure 15 is the main view of Fig. 2.

Figure 16 is the diagrammatic cross-section of the line A-A along Figure 15.

Figure 17 is the diagrammatic cross-section of the line B-B along Figure 15.

Figure 18 is diagrammatic cross-section of the line C-C in first embodiment along Figure 15.

Figure 19 is the stereoscopic schematic diagram of mixer in Figure 18.

Figure 20 is diagrammatic cross-section of the line C-C in second embodiment along Figure 15.

Figure 21 is the stereoscopic schematic diagram of diffuser in Figure 20.

Figure 22 is diagrammatic cross-section of the line C-C in third embodiment along Figure 15.

Figure 23 is the stereoscopic schematic diagram of bowl cover in Figure 22.

Figure 24 is the stereoscopic schematic diagram of another angle of Figure 23.

Figure 25 is diagrammatic cross-section of the line C-C in the 4th embodiment along Figure 15.

Figure 26 is the stereoscopic schematic diagram of bowl cover in Figure 25.

Figure 27 is the stereoscopic schematic diagram of another angle of Figure 26.

Specific embodiment

It please join shown in Fig. 1 to Figure 17, the utility model discloses a kind of box-type exhaust post-treatment apparatus of engine 100, It includes shell 1, several aftertreatment assemblies in the shell 1 and the cavity that aftertreatment assembly connection is got up Component.

In the utility model embodiment illustrated, the shell 1 includes first end cover 10, first baffle 11, second Baffle 12, second end cover 13 and be wrapped in first, second baffle, 11,12 periphery and with first, second end cap 10, 13 shells 14 being fixed together.

It please join shown in Figure 16 and Figure 17, be formed with the first space between the first end cover 10 and the first baffle 11 15, second space 16 is formed between the second end cover 13 and the second baffle 12.The shell 1 includes across described The exhaust inlet pipe 17 and the exhaust being connected with the second space 16 that one end cap 10 enters in first space 15 Outlet 18.The exhaust inlet pipe 17 is equipped with several gas vents 171 being connected to first space 15 on the peripheral wall, with Conducive to the distribution of air-flow.In the utility model embodiment illustrated, the exhaust inlet pipe 17 against and be fixed on described On first baffle 11, to play booster action.

Several aftertreatment assemblies include be at least partially disposed between first, second baffle 11,12 first after Processing component 21, the second aftertreatment assembly 22 for being aligned and being interconnected with first aftertreatment assembly 21 and with described One, two third aftertreatment assemblies 23 that the second aftertreatment assembly 21,22 is arranged side by side.In the embodiment party of the utility model diagram In formula, first aftertreatment assembly 21 is including diesel oxidation catalyst 211 and positioned at the upper of the diesel oxidation catalyst First perforated distributor 212 of trip.Second aftertreatment assembly 22 includes diesel particulate trap 221.Third post-processing group Part 23 includes selective catalytic reducing agent 231.

The first baffle 11 is equipped with first that first aftertreatment assembly 21 is connected with first space 15 Aperture 111.The second baffle 12 is equipped with second that second aftertreatment assembly 22 is connected with the second space 16 Aperture 121 and the third aperture 122 being connected with corresponding third aftertreatment assembly 23.

It please join shown in Fig. 2 and Figure 16, the box-type exhaust post-treatment apparatus of engine 100 further includes being fixed on described On two end caps 13 and the mounting portion 19 to install urea nozzle (not shown).

The cavity components include first cavity components 31 and first chamber of the clasp in second aperture 121 Mixer tube assembly 33 that body component 31 is connected and to by the mixer tube assembly 33 and the third aftertreatment assembly 23 The second cavity components 32 being connected.

The mixer tube assembly 33 includes mixing tube 38 and the sleeve part 39 matched with mixing tube 38.The mixing tube 38 include inner chamber body 381, peripheral and circumferentially distributed several fins 382 for being centered around the inner chamber body 381, correspond to it is described Several fins 382 and several flutings 383 being connected to the inner chamber body 381 and the antipriming pipe in the mixing tube 38 384.The antipriming pipe 384 is axial at least partly Chong Die with the fin 382 along it.The urea nozzle is to described porous Urea droplets are sprayed in pipe 384, the broken and heat transfer effect between the wall surface of mixing tube 38 of urea droplets are enhanced, to drop The low risk of urea crystals.

It please join shown in Figure 16, the second baffle 12 is additionally provided with perforative through-hole 123, and the mixing tube 38 vacantly passes through The through-hole 123, the fin 382 at least partly extend beyond the second baffle 12.The sleeve part 39 corresponds to described Through-hole 123.The sleeve part 39 is equipped with the extended cavity 391, and the fin 382 is at least partially disposed in the extended cavity 391. The utility model increases installation sky by setting sleeve part 39, in the inside of box-type exhaust post-treatment apparatus of engine 100 Between, the overall dimensions of box-type exhaust post-treatment apparatus of engine 100 are not limited to, and can be by adjusting extended cavity 391 The back pressure of system is adjusted flexibly in volume, realizes standardized designs.

Second cavity components 32 include the interstitial hole 321 being connected to the mixing tube 38 and be located at the interstitial hole Two connecting holes 322 of 321 two sides, the connecting hole 322 are connected with corresponding third aftertreatment assembly 23.

It please join shown in Figure 18 and Figure 19, the mixer tube assembly 33 further includes the gas positioned at the downstream of the antipriming pipe 384 Flow mixing arrangement 4.In the first embodiment, the air-flow mixing arrangement 4 includes the mixing being fixed in the mixing tube 38 Device 41, the mixer 41 include cylindrical portion 411 and several spoilers 412 being fixed in the cylindrical portion 411.

It please join shown in Figure 20 and Figure 21, in this second embodiment, the air-flow mixing arrangement 4 includes being located at described second The diffuser 42 being connected in cavity components 32 and with the mixing tube 38, the diffuser 42 are equipped with and are distributed on its circumference Several diffusion holes 421.

It please join shown in Figure 22 to Figure 24, in the third embodiment, the air-flow mixing arrangement 4 includes being located at described second The bowl cover 43 being aligned in cavity components 32 and with the mixing tube 38, the bowl cover 43 are equipped with the ball protruded out to the mixing tube 38 Shape face 431.

It please join shown in Figure 25 to Figure 27, in the fourth embodiment, the air-flow mixing arrangement 4 includes being located at described second The end bowl 44 being aligned in cavity components 32 and with the mixing tube 38, the end bowl 44 are equipped with the bearing space to receive air-flow 441 and protrude into spherical 442 in the bearing space 441.

Certainly, above-mentioned four kinds of embodiments can also carry out permutation and combination appropriate, such as by first embodiment and the Two embodiments are combined, to improve air-flow mixed effect.In addition, second embodiment can also for example be implemented with the 4th Mode is combined, i.e., the end bowl 44 is arranged in diffuser 42, air-flow mixed effect can be improved；On this basis, It can also be integrated together with first embodiment, can be further improved air-flow mixed effect.

In addition, above embodiments are merely to illustrate the utility model and not limit technical side described in the utility model Case, understanding of this description should be based on persons of ordinary skill in the field, although this specification is referring to above-mentioned Embodiment has been carried out detailed description to the utility model, still, those skilled in the art should understand that, affiliated skill The technical staff in art field still can be modified or replaced equivalently the utility model, and all not depart from this practical new The technical solution and its improvement of the spirit and scope of type, should all cover in the scope of the claims of the utility model.

Claims (13)

1. a kind of box-type exhaust post-treatment apparatus of engine comprising shell is located at the intracorporal several post-processing groups of the shell Part and the cavity components that aftertreatment assembly connection is got up, the shell includes first end cover, first baffle, second gear It plate, second end cover and is wrapped in first, second baffle periphery and is fixed together with first, second end cap outer Shell；The first space is formed between the first end cover and the first baffle, the shell includes and first space phase The exhaust inlet pipe of connection；Several aftertreatment assemblies include be at least partially disposed between first, second baffle One aftertreatment assembly, the second aftertreatment assembly for being aligned and being interconnected with first aftertreatment assembly and with described One, two third aftertreatment assemblies that the second aftertreatment assembly is arranged side by side；It is characterized in that：The first baffle is equipped with institute State the first aperture that the first aftertreatment assembly is connected with first space；Between the second end cover and the second baffle It is formed with second space, the second baffle is equipped with second that second aftertreatment assembly is connected with the second space Aperture and the third aperture being connected with corresponding third aftertreatment assembly；The cavity components include clasp described second The first cavity components in aperture, the mixer tube assembly being connected with first cavity components and to by the mixing The second cavity components that tube assembly is connected with the third aftertreatment assembly；The mixer tube assembly includes mixing tube and gas Flow mixing arrangement, the mixing tube include inner chamber body, the peripheral and circumferentially distributed several fins for being centered around the inner chamber body, Corresponding to several fins and several flutings being connected to the inner chamber body and the antipriming pipe in the mixing tube；Institute State the downstream that air-flow mixing arrangement is located at the antipriming pipe.

2. box-type exhaust post-treatment apparatus of engine as described in claim 1, it is characterised in that：The exhaust inlet pipe supports It leans on and is fixed on the first baffle, the exhaust inlet pipe is equipped on the peripheral wall several to be connected to first space Gas vent；The shell further includes the exhaust exit pipe being connected with the second space.

3. box-type exhaust post-treatment apparatus of engine as described in claim 1, it is characterised in that：The second baffle is equipped with Perforative through-hole, the mixing tube vacantly pass through the through-hole, and the fin at least partly extends beyond the second baffle.

4. box-type exhaust post-treatment apparatus of engine as claimed in claim 3, it is characterised in that：The mixer tube assembly packet The sleeve part of the through-hole is included positioned at the second baffle and corresponds to, the sleeve part is equipped with extended cavity, and the fin is at least Part is located in the extended cavity.

5. box-type exhaust post-treatment apparatus of engine as described in claim 1, it is characterised in that：The first post-processing group Part includes diesel oxidation catalyst and the first perforated distributor positioned at the upstream of the diesel oxidation catalyst；Described second Aftertreatment assembly includes diesel particulate trap；The third aftertreatment assembly includes selective catalytic reducing agent.

6. box-type exhaust post-treatment apparatus of engine as described in claim 1, it is characterised in that：The box-type engine Exhaust gas post-treatment device include it is fixed on the second end cover and the mounting portion to install urea nozzle, the urea nozzle To spray urea droplets into the antipriming pipe.

7. box-type exhaust post-treatment apparatus of engine as described in claim 1, it is characterised in that：Second cavity components Including the interstitial hole that is connected to the mixing tube and positioned at two connecting holes of the interstitial hole two sides, the connecting hole with it is right The third aftertreatment assembly answered is connected.

8. box-type exhaust post-treatment apparatus of engine as described in claim 1, it is characterised in that：The air-flow mixing arrangement Including the mixer being fixed in the mixing tube, if the mixer includes cylindrical portion and is fixed in the cylindrical portion Interfere flow.

9. box-type exhaust post-treatment apparatus of engine as claimed in claim 1 or 8, it is characterised in that：The air-flow mixing Device includes the diffuser being connected in second cavity components and with the mixing tube, and the diffuser is equipped with distribution Several diffusion holes on its circumference.

10. box-type exhaust post-treatment apparatus of engine as claimed in claim 1 or 8, it is characterised in that：The air-flow mixing Device includes the bowl cover being aligned in second cavity components and with the mixing tube, and the bowl is provide with the oriented mixing The spherical that pipe protrudes out.

11. box-type exhaust post-treatment apparatus of engine as claimed in claim 1 or 8, it is characterised in that：The air-flow mixing Device includes the end bowl being aligned in second cavity components and with the mixing tube, and the end bowl is equipped with to receive gas The bearing space of stream and protrude into spherical in the bearing space.

12. box-type exhaust post-treatment apparatus of engine as described in claim 1, it is characterised in that：The air-flow mixing dress It sets including being located at the diffuser being connected in second cavity components and with the mixing tube and being located at second cavity The end bowl being aligned in component and with the mixing tube, the diffuser are equipped with several diffusion holes being distributed on its circumference；It is described Bowl is held to be equipped with to receive the bearing space of air-flow and protrude into the spherical in the bearing space.

13. box-type exhaust post-treatment apparatus of engine as claimed in claim 12, it is characterised in that：The air-flow mixing dress Set the mixer including being fixed in the mixing tube, the mixer be located at the upstream of the diffuser and including cylindrical portion with And it is fixed on several spoilers in the cylindrical portion.