WO2018228083A1 - 发动机排气后处理装置以及拆卸方法 - Google Patents

发动机排气后处理装置以及拆卸方法 Download PDF

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Publication number
WO2018228083A1
WO2018228083A1 PCT/CN2018/085780 CN2018085780W WO2018228083A1 WO 2018228083 A1 WO2018228083 A1 WO 2018228083A1 CN 2018085780 W CN2018085780 W CN 2018085780W WO 2018228083 A1 WO2018228083 A1 WO 2018228083A1
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WIPO (PCT)
Prior art keywords
assembly
housing
particulate filter
oxidation catalyst
diesel
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PCT/CN2018/085780
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English (en)
French (fr)
Inventor
童毅君
于百战
王长林
Original Assignee
天纳克（苏州）排放系统有限公司
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Publication of WO2018228083A1 publication Critical patent/WO2018228083A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/26—Methods or apparatus for fitting, inserting or repairing different elements by bayonet fittings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an engine exhaust aftertreatment device and a method of disassembling a diesel particulate filter assembly.
  • Engine exhaust aftertreatment devices are primarily devices used to treat or purify toxic and hazardous materials in the exhaust.
  • the poisonous substances in the exhaust gas mainly include hydrocarbons, carbon monoxide, nitrogen oxides, and particulate matter.
  • Diesel particulate filters are prone to blockages after prolonged use, affecting the performance of the entire aftertreatment unit.
  • the industry often needs to design it as a detachable structure for easy maintenance.
  • the usual way in the industry is that the diesel oxidation catalyst is fixed, one end of the diesel particulate filter is connected to the diesel oxidation catalyst through a flat clamp, and the other end is connected to the flange by a V-shaped clamp.
  • the Chinese Utility Model Patent No. CN205654416U discloses a V-shaped clamp in which the exhaust pipes on both sides of the V-shaped clamp have overlapping portions in the axial direction.
  • the left exhaust pipe has a step portion for positioning the right exhaust pipe, and the step portion can play a limit role in the radial direction to Prevent the exhaust pipes on both sides from being disconnected.
  • an engine exhaust aftertreatment device including a housing and a plurality of aftertreatment assemblies located within the housing, wherein the housing includes exhaust for use with an engine Incoming inlet assembly, the diesel oxidation catalyst assembly in communication with the inlet assembly and diesel particulates downstream of the diesel oxidation catalyst assembly and in communication with the diesel oxidation catalyst assembly a filter assembly, wherein the diesel particulate filter assembly is disposed in line with the diesel oxidation catalyst assembly, the diesel oxidation catalyst assembly being detachably mounted to the housing by a strap, the diesel particulate One end of the filter assembly is removably coupled to the diesel oxidation catalyst assembly with a first clamp, and the other end of the diesel particulate filter assembly is removably coupled to a mounting flange by a second clamp.
  • the inlet assembly is fixed to the diesel oxidation catalyst assembly, and the inlet assembly and the diesel oxidation catalyst assembly are integrally detachably mounted to the housing.
  • the plurality of aftertreatment components further include at least one selective catalytic reduction component located downstream of the diesel particulate filter assembly, the engine exhaust aftertreatment device further comprising a mixing tube between the selective catalytic reduction assembly and the diesel particulate filter assembly, wherein the selective catalytic reduction assembly, the mixing tube, and the diesel particulate filter are arranged in parallel, the mixing tube is provided Several swirl tablets.
  • the housing includes a first housing and a first support plate cooperating with the first housing, wherein the first support plate is provided to support the selective catalytic reduction The opening of the component.
  • the housing further includes a second housing and a partition plate connected between the first housing and the second housing, wherein the first housing is The partition plate forms a first cavity that houses the selective catalytic reduction assembly and at least a portion of the mixing tube, the second housing and the divider plate forming a housing for the diesel particulate filter assembly A second cavity of the diesel oxidation catalyst assembly; wherein the second housing is detachably coupled to the housing.
  • the housing further includes a second support plate, and the mounting flange is located on the second support plate.
  • the first clamp and the second clamp are both V-shaped clamps.
  • the diesel oxidation catalyst assembly is detached from the housing prior to the diesel particulate filter assembly when the diesel particulate filter assembly is removed.
  • the present invention also discloses a method of disassembling the diesel particulate filter assembly from the engine exhaust aftertreatment device described above, comprising the steps of:
  • step S1 the diesel oxidation catalyst assembly is first moved axially a certain distance to be detached from the diesel particulate filter assembly, and then extracted in the radial direction; in step S2 The diesel particulate filter assembly is first moved axially a distance away from the mounting flange and then withdrawn radially.
  • the present invention provides a detachable diesel oxidation catalyst assembly by disassembling the diesel particulate filter assembly prior to disassembly of the diesel particulate filter assembly.
  • the diesel oxidation catalyst assembly can be maintained by disassembly, thereby increasing its conversion efficiency and service life.
  • Figure 1 is a perspective view of an engine exhaust aftertreatment device of the present invention.
  • Figure 2 is a perspective view of another angle of Figure 1.
  • Figure 3 is a partial exploded perspective view of Figure 1 with the second housing removed.
  • Figure 4 is a further exploded perspective view of Figure 3 with the end caps separated.
  • Figure 5 is a further exploded perspective view of Figure 4 with the web and the first support panel separated.
  • Fig. 6 is a front elevational view showing the element removed in Fig. 5 removed.
  • Figure 7 is a further exploded perspective view of Figure 5 with the diesel oxidation catalyst assembly removed.
  • Figure 8 is a further exploded perspective view of Figure 7 with the diesel particulate filter assembly removed.
  • Figure 9 is a further exploded perspective view of Figure 8 with the divider panels separated.
  • Figure 10 is a cross-sectional view taken along line A-A of Figure 1.
  • Figure 11 is a cross-sectional view taken along line B-B of Figure 1.
  • the present invention discloses an engine exhaust aftertreatment device 100 that includes a housing 1 and a plurality of aftertreatment assemblies located within the housing 1.
  • the housing 1 includes an inlet assembly 10 for communicating with exhaust gases of the engine.
  • the plurality of aftertreatment assemblies include a diesel oxidation catalyst assembly 2 in communication with the inlet assembly 10, a diesel particulate filter located downstream of the diesel oxidation catalyst assembly 2 and in communication with the diesel oxidation catalyst assembly 2
  • the assembly 3 and two selective catalytic reduction assemblies 4 located downstream of the diesel particulate filter assembly 3.
  • the diesel particulate filter assembly 3 is disposed on the same line as the diesel oxidation catalyst assembly 2.
  • the engine exhaust aftertreatment device 100 further includes a mixing tube 5 and a connecting plate 6 connected between the selective catalytic reduction assembly 4 and the diesel particulate filter assembly 3.
  • the mixing tube 5 is provided with a plurality of swirl fins 51.
  • the connecting plate 6 introduces exhaust gas from the diesel particulate filter assembly 3 into the swirling sheet 51.
  • the housing 1 is further provided at its end face with a nozzle mounting portion 16 corresponding to the mixing tube 5 for mounting a urea nozzle (not shown). When the injection condition is reached, the urea nozzle injects the atomized urea solution into the mixing tube, and the urea droplets and the exhaust gas are thoroughly mixed in the mixing tube 5.
  • the selective catalytic reduction assembly 4, the mixing tube 5, and the diesel particulate filter 3 are arranged in parallel.
  • the inlet assembly 10 is fixed to the diesel oxidation catalyst assembly 2, and the inlet assembly 10 and the diesel oxidation catalyst assembly 2 are integrally detachably mounted to the assembly.
  • the housing 1 is described. Specifically, the diesel oxidation catalyst assembly 2 is detachably mounted to the housing 1 by a strap 7.
  • the present invention can maintain the diesel oxidation catalyst assembly 2 by disassembly, thereby increasing its conversion efficiency and service life.
  • the housing 1 includes a first housing 11 and a second housing 12 that are substantially L-shaped, a first support plate 13 that cooperates with the first housing 11, and is coupled to the first housing 11 and a partition plate 14 between the second casings 12 and a second support plate 15.
  • the first support plate 13 is provided with an opening 131 for supporting the selective catalytic reduction assembly 4.
  • the first housing 11 and the partition plate 14 form a first cavity 110 accommodating the selective catalytic reduction assembly 4 and at least a portion of the mixing tube 5, the second housing 12 and the minute
  • the partition 14 forms a second cavity 120 that houses the diesel particulate filter assembly 3 and the diesel oxidation catalyst assembly 2; wherein the second housing 12 is detachably coupled to the housing 1.
  • the second support plate 15 is provided with a mounting flange 151.
  • One end of the diesel particulate filter assembly 3 is detachably coupled to the diesel oxidation catalyst assembly 2 by a first clamp 71, and the other end of the diesel particulate filter assembly 3 is coupled to the mounting method by a second clamp 72
  • the Lan 151 is detachably connected.
  • the first clamp 71 and the second clamp 72 are both V-shaped clamps.
  • the disassembly method of the present invention includes the following steps:
  • step S1 the diesel oxidation catalyst assembly 2 is first moved a certain distance in the axial direction M to be disengaged from the diesel particulate filter assembly 3, and then extracted in the radial direction N.
  • step S2 the diesel particulate filter assembly 3 is first moved a certain distance in the axial direction M to be disengaged from the mounting flange 151, and then extracted in the radial direction N.
  • the present invention makes a part of the engine exhaust after-treatment device 100 that does not need to be disassembled into a closed cavity, which increases the muffling volume, optimizes the muffling structure, and improves the acoustic performance;
  • the invention provides greater convenience in disassembling the diesel particulate filter assembly 3 by providing a detachable diesel oxidation catalyst assembly 2 and detaching from the housing 1 prior to the diesel particulate filter assembly 3. In this case, both ends of the diesel particulate filter assembly 3 can be connected using a lower cost V-shaped clamp.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

一种发动机排气后处理装置，其包括壳体（1）以及位于壳体（1）内的若干后处理组件，其中后处理组件包括柴油机氧化催化器组件（2）以及位于柴油机氧化催化器组件（2）的下游且与柴油机氧化催化器组件（2）相连通的柴油颗粒过滤器组件（3）。柴油机氧化催化器组件（2）通过一个绑带（7）可拆卸地安装于壳体（1）。柴油颗粒过滤器组件（3）的一端用第一卡箍（71）与柴油机氧化催化器组件（2）可拆卸地连接，柴油颗粒过滤器组件（3）的另一端用第二卡箍（72）与一个安装法兰（151）可拆卸地连接。如此设置，便于拆卸柴油颗粒过滤器组件。另外，本发明还涉及一种拆卸方法。

Description

发动机排气后处理装置以及拆卸方法
本申请要求了申请日为2017年6月14日、申请号为201710446383.9、发明名称为“发动机排气后处理装置以及拆卸方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种发动机排气后处理装置以及拆卸柴油颗粒过滤器组件的拆卸方法。
背景技术
发动机排气后处理装置(例如柴油机排气后处理装置)主要是用来处理或净化排气中有毒及有害物质的装置。排气中的毒害物质主要包含碳氢化合物、一氧化碳、氮氧化物及颗粒物等。
现有技术中已经有采用柴油机氧化催化器(DOC)、柴油颗粒过滤器(DPF)以及选择性催化还原(SCR)相组合的方案来提高排气处理的效能。柴油颗粒过滤器在长期使用后容易导致堵塞，从而影响整个后处理装置的性能，业界通常需要将其设计为可拆卸式的结构，从而便于维护。
业界通常的方式是柴油机氧化催化器是固定的，将柴油颗粒过滤器的一端通过平卡箍与柴油机氧化催化器连接，另一端通过V形卡箍与法兰连接。2016年10月19日公告的中国实用新型专利第CN205654416U揭示了一种V形卡箍，其中在轴向上V形卡箍两侧的排气管具有相互重叠的部分。具体地，请参该专利的图2所示，为了实现定位，左侧的排气管具有定位右侧排气管的台阶部，这种台阶部在径向上能够起到限位的作用，以防止两侧的排气管脱节。然而，由于平卡箍所占用的安装空间较大且成本较高，从而使得在拆卸柴油颗粒过滤器时操作不方便。因此，如何解决在发动机排气后处理装置的整体尺寸比较小的情况下，能够更灵活的拆卸柴油颗粒过滤器是业界需要解决的技术问题之一。
发明内容
本发明的目的在于提供一种易于拆卸的发动机排气后处理装置及其拆卸方法。
为实现上述目的，本发明采用如下技术方案：一种发动机排气后处理装置，其包括壳体以及位 于所述壳体内的若干后处理组件，其中所述壳体包括用以与发动机的排气相连通的进口组件，所述若干后处理组件包括所述进口组件相连通的柴油机氧化催化器组件以及位于所述柴油机氧化催化器组件的下游且与所述柴油机氧化催化器组件相连通的柴油颗粒过滤器组件，其中所述柴油颗粒过滤器组件与所述柴油机氧化催化器组件设置在同一直线，所述柴油机氧化催化器组件通过一个绑带可拆卸地安装于所述壳体，所述柴油颗粒过滤器组件的一端用第一卡箍与柴油机氧化催化器组件可拆卸地连接，所述柴油颗粒过滤器组件的另一端用第二卡箍与一个安装法兰可拆卸地连接。
作为本发明进一步改进的技术方案，所述进口组件与所述柴油机氧化催化器组件固定在一起，所述进口组件与所述柴油机氧化催化器组件整体上可拆卸地安装于所述壳体。
作为本发明进一步改进的技术方案，所述若干后处理组件还包括位于所述柴油颗粒过滤器组件的下游的至少一个选择性催化还原组件，所述发动机排气后处理装置还包括连接在所述选择性催化还原组件与所述柴油颗粒过滤器组件之间的混合管，其中所述选择性催化还原组件、所述混合管以及所述柴油颗粒过滤器三者平行布置，所述混合管设有若干旋流片。
作为本发明进一步改进的技术方案，所述壳体包括第一壳体以及与所述第一壳体相配合的第一支撑板，其中所述第一支撑板设有支撑所述选择性催化还原组件的开孔。
作为本发明进一步改进的技术方案，所述壳体还包括第二壳体以及连接在所述第一壳体与所述第二壳体之间的分隔板，其中所述第一壳体与所述分隔板形成容纳所述选择性催化还原组件以及至少部分所述混合管的第一腔体，所述第二壳体与所述分隔板形成容纳所述柴油颗粒过滤器组件以及所述柴油机氧化催化器组件的第二腔体；其中所述第二壳体可拆卸地连接在所述壳体上。
作为本发明进一步改进的技术方案，所述壳体还包括第二支撑板，所述安装法兰位于所述第二支撑板上。
作为本发明进一步改进的技术方案，所述第一卡箍与所述第二卡箍均为V形卡箍。
作为本发明进一步改进的技术方案，在拆除所述柴油颗粒过滤器组件时，所述柴油机氧化催化器组件先于所述柴油颗粒过滤器组件从所述壳体中拆卸。
本发明还揭示了一种从上述的发动机排气后处理装置中拆卸所述柴油颗粒过滤器组件的拆卸方法，其包括如下步骤：
S1，拆除所述绑带以及第一卡箍，以将所述柴油机氧化催化器组件先拆卸出来；以及
S2，拆除所述第二卡箍，并将所述柴油颗粒过滤器组件拆卸出来。
作为本发明进一步改进的技术方案，在步骤S1中，所述柴油机氧化催化器组件先被沿轴向移动一定的距离使之与柴油颗粒过滤器组件脱离，然后再沿径向抽出；在步骤S2中，所述柴油颗粒过滤器组件先被沿轴向移动一定的距离使之与所述安装法兰脱离，然后再沿径向抽出。
相较于现有技术，本发明通过设置可以拆卸的柴油机氧化催化器组件，并先于所述柴油颗粒过滤器组件从所述壳体中拆卸，一方面给拆卸柴油颗粒过滤器组件提供了较大的便利性；另一方面可以通过拆卸来维护柴油机氧化催化器组件，从而增加其转化效率和使用寿命。
附图说明
图1是本发明发动机排气后处理装置的立体示意图。
图2是图1另一角度的立体示意图。
图3是图1的部分立体分解图，其中第二壳体被拆卸出来。
图4是图3的进一步的立体分解图，其中端盖被分离出来。
图5是图4的进一步的立体分解图，其中连接板以及第一支撑板被分离出来。
图6是去除图5中被分离出来的元件之后的主视图。
图7是图5的进一步的立体分解图，其中柴油机氧化催化器组件被拆卸出来。
图8是图7进一步的立体分解图，其中柴油颗粒过滤器组件被拆卸出来。
图9是图8进一步的立体分解图，其中分隔板被分离出来。
图10是沿图1中A-A线的剖面示意图。
图11是沿图1中B-B线的剖面示意图。
具体实施方式
请参图1至图11所示，本发明揭示了一种发动机排气后处理装置100，其包括壳体1以及位于所述壳体1内的若干后处理组件。其中，所述壳体1包括用以与发动机的排气相连通的进口组件10。所述若干后处理组件包括所述进口组件10相连通的柴油机氧化催化器组件2、位于所述柴油机氧化催化器组件2的下游且与所述柴油机氧化催化器组件2相连通的柴油颗粒过滤器组件3以及位于所述柴油颗粒过滤器组件3的下游的两个选择性催化还原组件4。所述柴油颗粒过滤 器组件3与所述柴油机氧化催化器组件2设置在同一直线上。所述发动机排气后处理装置100还包括连接在所述选择性催化还原组件4与所述柴油颗粒过滤器组件3之间的混合管5以及连接板6。所述混合管5设有若干旋流片51。所述连接板6将从柴油颗粒过滤器组件3出来的排气引入到所述旋流片51中。所述壳体1在其端面还设有对应于所述混合管5的喷嘴安装部16，用以安装尿素喷嘴(未图示)。当达到喷射条件时，所述尿素喷嘴向所述混合管中喷射雾化的尿素溶液，尿素液滴与排气在混合管5中进行充分混合。在本发明图示的实施方式中，所述选择性催化还原组件4、所述混合管5以及所述柴油颗粒过滤器3三者平行布置。
在本发明图示的实施方式中，所述进口组件10与所述柴油机氧化催化器组件2固定在一起，所述进口组件10与所述柴油机氧化催化器组件2整体上可拆卸地安装于所述壳体1。具体地，所述柴油机氧化催化器组件2通过一个绑带7可拆卸地安装于所述壳体1。本发明可以通过拆卸来维护柴油机氧化催化器组件2，从而增加其转化效率和使用寿命。
所述壳体1包括大致呈L形的第一壳体11以及第二壳体12、与所述第一壳体11相配合的第一支撑板13、连接在所述第一壳体11与所述第二壳体12之间的分隔板14、以及第二支撑板15。其中，所述第一支撑板13设有支撑所述选择性催化还原组件4的开孔131。所述第一壳体11与所述分隔板14形成容纳所述选择性催化还原组件4以及至少部分所述混合管5的第一腔体110，所述第二壳体12与所述分隔板14形成容纳所述柴油颗粒过滤器组件3以及所述柴油机氧化催化器组件2的第二腔体120；其中所述第二壳体12可拆卸地连接在所述壳体1上。
所述第二支撑板15设有安装法兰151。所述柴油颗粒过滤器组件3的一端用第一卡箍71与柴油机氧化催化器组件2可拆卸地连接，所述柴油颗粒过滤器组件3的另一端用第二卡箍72与所述安装法兰151可拆卸地连接。优选地，所述第一卡箍71与所述第二卡箍72均为V形卡箍。
在拆除所述柴油颗粒过滤器组件3时，所述柴油机氧化催化器组件2先于所述柴油颗粒过滤器组件3从所述壳体1中拆卸。具体地，本发明的拆卸方法包括如下步骤：
S1，拆除所述绑带7以及第一卡箍71，以将所述柴油机氧化催化器组件2先拆卸出来；以及
S2，拆除所述第二卡箍72，并将所述柴油颗粒过滤器组件3拆卸出来。
根据本发明图示的实施方式，在步骤S1中，所述柴油机氧化催化器组件2先被沿轴向M移动一定的距离使之与柴油颗粒过滤器组件3脱离，然后再沿径向N抽出；在步骤S2中，所述柴油颗粒过滤器组件3先被沿轴向M移动一定的距离使之与所述安装法兰151脱离，然后再沿径向 N抽出。
相较于现有技术，本发明将发动机排气后处理装置100中不需要拆卸的部分做成封闭式腔体，增加了消声体积、优化了消声结构，提高了声学性能；另外，本发明通过设置可以拆卸的柴油机氧化催化器组件2，并先于所述柴油颗粒过滤器组件3从所述壳体1中拆卸，从而给拆卸柴油颗粒过滤器组件3提供了较大的便利性。在这种情况下，柴油颗粒过滤器组件3的两端均可以采用成本较低的V形卡箍进行连接。
另外，以上实施例仅用于说明本发明而并非限制本发明所描述的技术方案，对本说明书的理解应该以所属技术领域的技术人员为基础，尽管本说明书参照上述的实施例对本发明已进行了详细的说明，但是，本领域的普通技术人员应当理解，所属技术领域的技术人员仍然可以对本发明进行修改或者等同替换，而一切不脱离本发明的精神和范围的技术方案及其改进，均应涵盖在本发明的权利要求范围内。

Claims (10)

  1. 一种发动机排气后处理装置，其包括壳体以及位于所述壳体内的若干后处理组件，其中所述壳体包括用以与发动机的排气相连通的进口组件，所述若干后处理组件包括所述进口组件相连通的柴油机氧化催化器组件以及位于所述柴油机氧化催化器组件的下游且与所述柴油机氧化催化器组件相连通的柴油颗粒过滤器组件，其中所述柴油颗粒过滤器组件与所述柴油机氧化催化器组件设置在同一直线，其特征在于：所述柴油机氧化催化器组件通过一个绑带可拆卸地安装于所述壳体，所述柴油颗粒过滤器组件的一端用第一卡箍与柴油机氧化催化器组件可拆卸地连接，所述柴油颗粒过滤器组件的另一端用第二卡箍与一个安装法兰可拆卸地连接。
  2. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述进口组件与所述柴油机氧化催化器组件固定在一起，所述进口组件与所述柴油机氧化催化器组件整体上可拆卸地安装于所述壳体。
  3. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述若干后处理组件还包括位于所述柴油颗粒过滤器组件的下游的至少一个选择性催化还原组件，所述发动机排气后处理装置还包括连接在所述选择性催化还原组件与所述柴油颗粒过滤器组件之间的混合管，其中所述选择性催化还原组件、所述混合管以及所述柴油颗粒过滤器三者平行布置，所述混合管设有若干旋流片。
  4. 如权利要求3所述的发动机排气后处理装置，其特征在于：所述壳体包括第一壳体以及与所述第一壳体相配合的第一支撑板，其中所述第一支撑板设有支撑所述选择性催化还原组件的开孔。
  5. 如权利要求4所述的发动机排气后处理装置，其特征在于：所述壳体还包括第二壳体以及连接在所述第一壳体与所述第二壳体之间的分隔板，其中所述第一壳体与所述分隔板形成容纳所述选择性催化还原组件以及至少部分所述混合管的第一腔体，所述第二壳体与所述分隔板形成容纳所述柴油颗粒过滤器组件以及所述柴油机氧化催化器组件的第二腔体；其中所述第二壳体可拆卸地连接在所述壳体上。
  6. 如权利要求5所述的发动机排气后处理装置，其特征在于：所述壳体还包括第二支撑板，所述安装法兰位于所述第二支撑板上。
  7. 如权利要求1所述的发动机排气后处理装置，其特征在于：所述第一卡箍与所述第二卡箍均为V形卡箍。
  8. 如权利要求1所述的发动机排气后处理装置，其特征在于：在拆除所述柴油颗粒过滤器组件时，所述柴油机氧化催化器组件先于所述柴油颗粒过滤器组件从所述壳体中拆卸。
  9. 一种从如权利要求1至8项中任意一项所述的发动机排气后处理装置中拆卸所述柴油颗粒过滤器组件的拆卸方法，其包括如下步骤：
    S1，拆除所述绑带以及第一卡箍，以将所述柴油机氧化催化器组件先拆卸出来；以及
    S2，拆除所述第二卡箍，并将所述柴油颗粒过滤器组件拆卸出来。
  10. 如权利要求9所述的拆卸方法，其特征在于：在步骤S1中，所述柴油机氧化催化器组件先被沿轴向移动一定的距离使之与柴油颗粒过滤器组件脱离，然后再沿径向抽出；在步骤S2中，所述柴油颗粒过滤器组件先被沿轴向移动一定的距离使之与所述安装法兰脱离，然后再沿径向抽出。
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