CN108301897B - 废气净化装置 - Google Patents
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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
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- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/102—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having thermal insulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
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- F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N13/141—Double-walled exhaust pipes or housings
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- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0233—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 using means for regenerating the filters, e.g. by burning trapped particles periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
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Abstract
本发明能够使过滤单元容易从上游侧排气管以及下游侧排气管脱离,且能够抑制热从过滤单元向周围放射。隔热体(24)设置有把手部(29)。工作人员把持把手部(29),使DPF(10)向从上游侧排气管(13)以及下游侧排气管(14)分离的方向移动,能够使DPF(10)容易从上游侧排气管(13)以及下游侧排气管(14)脱离。而且,隔热体(24)覆盖DPF(10)的壳体(21)的外周面(21a)整周。因此,不会有把手部(29)因设置于壳体(21)的外周面(21a)而成为妨碍,使得无法通过隔热体(24)覆盖壳体(21)的外周面(21a)整周的情况。因此,能够通过隔热体(24)抑制热从DPF(10)向周围放射。
Description
技术领域
本发明涉及对从内燃机排出的废气进行净化的废气净化装置。
背景技术
搭载于车辆的内燃机的废气净化装置利用DPF(Diesel particulate filter:过滤单元)对从内燃机排出的废气所包含的PM(Particulate Matter:粒子状物质)进行捕集。由于DPF的PM捕集能力存在极限,所以在PM堆积量为一定量以上时,使排气温度上升至PM燃烧温度,来将堆积于DPF的PM燃烧而将PM去除而进行PM再生。
另一方面,伴随着车辆的行驶距离、行驶时间变长,除PM之外,废气包含的发动机油的成分带来的灰分也堆积于DPF。由于灰分的分解温度为1000℃以上,所以在通常的PM再生中无法除去,灰分持续在DPF堆积。因此,为了防止大量灰分堆积于DPF而导致DPF堵塞,因而进行定期清洗DPF、或者将DPF更换成新的之类的维护。
例如,在专利文献1的废气净化装置中,在连结上游侧排气管与下游侧排气管之间的DPF的壳体外周面设置有把手,在维护DPF时,工作人员把持把手将DPF从上游侧排气管以及下游侧排气管拆下。
专利文献1:日本特开2010-19188号公报
然而,在搭载于车辆的废气净化装置中,受搭载场所的制约,在高温的DPF的周围也配置有废气净化装置、内燃机的各种构成部件。因此,需要防止DPF的放射热对构成部件造成的热损伤。
作为防止热损伤的方法,考虑在DPF的壳体外周面设置屏蔽热的隔热体,但如专利文献1所述,在把手设置于壳体的外周面的结构中会产生如下问题:把手成为妨碍,无法以隔热体覆盖壳体的外周面整体。
发明内容
本发明是为了解决上述课题而完成的,目的在于提供能够使过滤单元容易相对于上游侧排气管以及下游侧排气管脱离且能够抑制热从过滤单元向周围放射的废气净化装置。
解决上述课题的废气净化装置具备过滤单元,上述过滤单元在构成内燃机的排气通路的上游侧排气管与下游侧排气管之间,以能够相对于该上游侧排气管以及下游侧排气管脱离的方式被连结,其中,上述过滤单元具备:过滤器,其对在上述排气通路中流动的废气所包含的粒子状物质进行捕集;壳体,其在内部收纳有上述过滤器;以及隔热体,其覆盖上述壳体的外周面整周,在上述隔热体设置有把手部。
据此,工作人员把持把手部,使过滤单元向相对于上游侧排气管以及下游侧排气管分离的方向移动,由此能够使过滤单元容易相对于上游侧排气管以及下游侧排气管脱离。而且,由于隔热体覆盖壳体的外周面整周,所以能够抑制热从过滤单元向周围放射。
在上述废气净化装置中,上述隔热体优选包括:隔热件,其覆盖上述壳体的外周面;以及保持部件,其以覆盖上述隔热件的方式设置,并且相对于上述壳体而对上述隔热件进行保持,上述把手部与上述保持部件形成为一体。
据此,把手部相对于隔热体成为分体的部件,与把手部设置于隔热体的结构相比,能够减少部件个数,并且能够简化结构。
【发明的效果】
根据本发明,能够使过滤单元容易相对于上游侧排气管以及下游侧排气管脱离,且能够抑制热从过滤单元向周围放射。
附图说明
图1是废气净化装置的侧视图。
图2是图1中的2-2线剖视图。
附图标记说明:
10…DPF(过滤单元);11…内燃机;12…排气通路;13…上游侧排气管;14…下游侧排气管;21…壳体;21a…外周面;22…过滤器;24…隔热体;25…隔热件;26…保持部件;29…把手部。
具体实施方式
以下,参照图1以及图2说明将废气净化装置具体化了的一个实施方式。本实施方式的内燃机的废气净化装置搭载于工业车,该工业车搭载柴油发动机等内燃机作为动力源,例如叉车。
如图1所示,废气净化装置的DPF10(Diesel particulate filter:过滤单元)设置于与内燃机11的排气侧连接的排气通路12。DPF10捕集在排气通路12流动的废气所包含的PM(Particulate Matter:粒子状物质)。排气通路12具有:上游侧排气管13,其位于比DPF10靠废气的流动方向R1的上游侧,构成排气通路12的一部分;以及下游侧排气管14,其位于比DPF10靠废气的流动方向的下游侧,构成排气通路12的一部分。
DPF10与上游侧排气管13通过上游侧V字夹紧部件15而相互连结。DPF10与下游侧排气管14通过下游侧V字夹紧部件16而相互连结。通过拆下上游侧V字夹紧部件15与下游侧V字夹紧部件16,DPF10能够相对于上游侧排气管13以及下游侧排气管14脱离。
在上游侧排气管13内设置有DOC17(氧化催化剂)。DOC17是对废气的HC(烃)进行氧化处理而促进PM的燃烧的催化剂。在上游侧排气管13的外周面设置有DOC用隔热体13a。DOC用隔热体13a至少覆盖上游侧排气管13的、在内侧具有DOC17的部位的外周面整周。DOC用隔热体13a屏蔽来自DOC17的热。
另外,在上游侧排气管13设置有上游侧温度传感器18。上游侧温度传感器18配置于上游侧排气管13的比DOC17靠下游侧的位置。上游侧温度传感器18检测在上游侧排气管13内通过DOC17且通过DPF10之前的废气的温度。上游侧温度传感器18经由第一配线18a与叉车的ECU20电连接。
在下游侧排气管14设置有下游侧温度传感器19。下游侧温度传感器19检测通过DPF10在下游侧排气管14内流动的废气的温度。下游侧温度传感器19经由第二配线19a与ECU20电连接。
如图2所示,DPF10具有金属制的近似圆筒状的壳体21和收容于壳体21内的过滤器22。因此,壳体21在内部收纳有过滤器22。过滤器22由多孔质的陶瓷构成,捕集废气所包含的PM。在壳体21的内周面设置有圆筒状的防振用垫23。防振用垫23例如由玻璃棉构成。过滤器22以在防振用垫23的内侧与防振用垫23的内周面接触的状态配置。凭借防振用垫23,能够抑制过滤器22的振动向壳体21传播、或者壳体21的振动向过滤器22传播。
在DPF10设置有覆盖壳体21的外周面21a整周的隔热体24。隔热体24具有圆筒状的隔热件25和圆筒状的保持部件26。
隔热件25设置为覆盖壳体21的外周面21a整周。隔热件25例如由玻璃棉构成。
保持部件26相对于壳体21的外周面21a而保持隔热件25。保持部件26由第一分割零件27与第二分割零件28构成。第一分割零件27以及第二分割零件28例如是铝制。隔热件25以及保持部件26对因高温的废气流动而从壳体21释放出的热进行屏蔽。
第一分割零件27具有:第一覆盖部27a,其沿隔热件25的外周面在隔热件25的周向上延伸;以及板状的一对第一凸缘27b,它们分别从第一覆盖部27a的周向的两端部向隔热件25的径向外侧突出。第一覆盖部27a在周向上遍及180度延伸。因此,两第一凸缘27b在第一覆盖部27a的周向上配置于相隔180度的位置。
在俯视观察时,两第一凸缘27b是长方形板状。两第一凸缘27b的长边方向与壳体21的轴向一致。在两第一凸缘27b分别形成有长方形形状的贯通孔27c。贯通孔27c的长边方向与第一凸缘27b的长边方向一致。
第二分割零件28具有:第二覆盖部28a,其沿隔热件25的外周面在隔热件25的周向上延伸;以及板状的一对第二凸缘28b,它们分别从第二覆盖部28a的周向的两端部向隔热件25的径向外侧突出。第二覆盖部28a在周向上遍及180度延伸。因此,两第二凸缘28b在第二覆盖部28a的周向上配置于相隔180的位置。
在俯视观察时,两第二凸缘28b是长方形板状。两第二凸缘28b的长边方向与壳体21的轴向一致。在两第二凸缘28b分别形成有长方形形状的贯通孔28c。贯通孔28c的长边方向与第二凸缘28b的长边方向一致。
第一分割零件27以及第二分割零件28以如下状态配置,即:两第一凸缘27b与两第二凸缘28b重叠,并且两第一凸缘27b的贯通孔27c与两第二凸缘28b的贯通孔28c连通。而且,第一分割零件27与第二分割零件28通过分别焊接接合两第一凸缘27b与两第二凸缘28b的配合面而成为一体。隔热件25的外周面整周由第一分割零件27的第一覆盖部27a与第二分割零件28的第二覆盖部28a覆盖。因此,保持部件26覆盖隔热件25的外周面整周。
工作人员的手能够插入两第一凸缘27b的贯通孔27c以及两第二凸缘28b的贯通孔28c的内侧。而且,工作人员能够利用插入到两第一凸缘27b的贯通孔27c以及两第二凸缘28b的贯通孔28c的内侧的手来把持第一凸缘27b以及第二凸缘28b。因此,两第一凸缘27b以及两第二凸缘28b作为工作人员在维护时等能够进行把持的把手部29而发挥功能。因此,在隔热体24设置有一对把手部29,在本实施方式中,一对把手部29与保持部件26形成为一体。
接下来,说明本实施方式的作用。
在DPF10中,伴随着使用,PM向过滤器22的堆积量增加。由于过滤器22的PM堆积允许量存在极限,所以在堆积一定量以上的PM时,使废气的温度上升,燃烧除去堆积于过滤器22的PM来进行PM再生。
另外,在废气中,除PM以外,还包含灰分。由于灰分的分解温度为1000℃以上,高于PM的燃烧温度,所以在通常的PM再生中无法除去灰分。因此,为了抑制灰分大量堆积于过滤器22而导致过滤器22堵塞,需要定期清洗过滤器22,或者将DPF10更换成新的之类的维护。
在维护DPF10时,工作人员拆下上游侧V字夹紧部件15以及下游侧V字夹紧部件16,使DPF10成为能够相对于上游侧排气管13以及下游侧排气管14脱离的状态,把持把手部29,将DPF10和隔热体24一起相对于上游侧排气管13以及下游侧排气管14例如向上方拉起。这样,工作人员把持把手部29,使DPF10向相对于上游侧排气管13以及下游侧排气管14分离的方向移动,由此使DPF10相对于上游侧排气管13以及下游侧排气管14脱离,进行DPF10的维护。
另外,壳体21、过滤器22因PM再生等而温度升高,但用于屏蔽热的隔热体24覆盖壳体21的外周面21a整周,因此能够抑制热从DPF10向外部放射。因此,能够抑制对存在于DPF10的周围的上游侧温度传感器18、下游侧温度传感器19、第一配线18a以及第二配线19a等构成部件产生热损伤。
在上述实施方式中,能够获得以下效果。
(1)由于在隔热体24设置有把手部29,所以工作人员能够把持把手部29来使DPF10向相对于上游侧排气管13以及下游侧排气管14分离的方向移动,由此容易使DPF10相对于上游侧排气管13以及下游侧排气管14脱离。而且,由于隔热体24覆盖DPF10的壳体21的外周面21a整周,所以不会产生如下情况,即:把手部29因设置于壳体21的外周面21a而成为妨碍,使得无法通过隔热体24覆盖壳体21的外周面21a整周。因此,能够通过隔热体24抑制热从DPF10向周围放射。
(2)隔热体24包括:隔热件25,其覆盖壳体21的外周面21a;以及保持部件26,其设置为覆盖隔热件25,并且相对于壳体21保持隔热件25,把手部29与保持部件26形成为一体。据此,与把手部29相对于隔热体24是另外的部件且设置于隔热体24的结构相比,能够减少部件个数,且能够简化结构。
(3)由于把手部29设置于隔热体24,所以与把手部29例如直接安装于壳体21的情况相比,把手部29难以因DPF10的热而变热,即便不等待至把手部29变冷,工作人员也可以把持把手部29。因此,工作人员能够顺畅地维护DPF10。
(4)在隔热体24设置有一对把手部29。据此,例如与在隔热体24仅设置有1个把手部29的情况相比,在使DPF10相对于上游侧排气管13以及下游侧排气管14分离时,DPF10相对于上游侧排气管13以及下游侧排气管14的移动方向的选择增加,维护DPF10的作业性提高。
此外,上述实施方式也可以如以下那样变更。
○在实施方式中,也可以形成为:仅在两第一凸缘27b中的一方形成有贯通孔27c,并且仅在两第二凸缘28b中的一方形成有贯通孔28c。在该情况下,第一分割零件27以及第二分割零件28以如下状态配置,即:形成有贯通孔27c的第一凸缘27b与形成有贯通孔28c的第二凸缘28b重叠,并且两贯通孔27c、28c连通。而且,通过形成有贯通孔27c的第一凸缘27b与形成有贯通孔28c的第二凸缘28b构成把手部29。因此,隔热体24也可以构成为仅设置有1个把手部29。
○在实施方式中,也可以形成为:不在两第一凸缘27b形成有贯通孔27c,而在两第一凸缘27b的与第二凸缘28b相反一侧的面形成有凹部。相同地,也可以形成为:不在两第二凸缘28b形成有贯通孔28c,而在两第二凸缘28b的与第一凸缘27b相反一侧的面形成有凹部。然后,工作人员也可以将手指勾入形成于两第一凸缘27b以及两第二凸缘28b的凹部来把持第一凸缘27b以及第二凸缘28b。
○在实施方式中,把手部29相对于隔热体24也可以是另外的部件,把手部29可以安装于保持部件26。
○实施方式的废气净化装置也可以搭载于除叉车以外的工业车辆。
○实施方式的废气净化装置也可以搭载于除工业车辆以外的车辆。
Claims (2)
1.一种废气净化装置,其具备过滤单元,该过滤单元在构成内燃机的排气通路的上游侧排气管与下游侧排气管之间,以能够相对于该上游侧排气管以及下游侧排气管脱离的方式被连结,
所述废气净化装置的特征在于,
所述过滤单元具备:
过滤器,其对在所述排气通路流动的废气所包含的粒子状物质进行捕集;
壳体,其在内部收纳有所述过滤器;以及
隔热体,其覆盖所述壳体的外周面整周,
所述隔热体设置有把手部。
2.根据权利要求1所述的废气净化装置,其特征在于,
所述隔热体包括:
隔热件,其覆盖所述壳体的外周面;以及
保持部件,其设置为覆盖所述隔热件,并且相对于所述壳体保持所述隔热件,
所述把手部与所述保持部件形成为一体。
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CN1458999A (zh) * | 2001-03-22 | 2003-11-26 | 揖斐电株式会社 | 废气净化装置 |
CN102016255A (zh) * | 2008-07-10 | 2011-04-13 | 日立建机株式会社 | 废气处理装置 |
CN103423550A (zh) * | 2012-05-23 | 2013-12-04 | 特兰斯科产品股份有限公司 | 用于隔热体的束带系统 |
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JP3559235B2 (ja) | 2000-09-22 | 2004-08-25 | 日野自動車株式会社 | 排気浄化装置 |
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US20060286013A1 (en) * | 2005-04-27 | 2006-12-21 | Hovda Allan T | Engine exhaust system component having structure for accessing aftertreatment device |
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JP4820847B2 (ja) | 2008-07-11 | 2011-11-24 | 日立建機株式会社 | 建設機械の排気ガス浄化装置 |
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JP5271732B2 (ja) | 2009-01-27 | 2013-08-21 | ヤンマー株式会社 | 排気浄化装置 |
US9217357B2 (en) * | 2011-10-20 | 2015-12-22 | Ruth Latham | Method of producing an insulated exhaust device |
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CN102016255A (zh) * | 2008-07-10 | 2011-04-13 | 日立建机株式会社 | 废气处理装置 |
CN103423550A (zh) * | 2012-05-23 | 2013-12-04 | 特兰斯科产品股份有限公司 | 用于隔热体的束带系统 |
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