CN217507772U - 排放气体加热器 - Google Patents

排放气体加热器 Download PDF

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CN217507772U
CN217507772U CN202220003715.2U CN202220003715U CN217507772U CN 217507772 U CN217507772 U CN 217507772U CN 202220003715 U CN202220003715 U CN 202220003715U CN 217507772 U CN217507772 U CN 217507772U
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exhaust gas
gas heater
cap
conductor cable
sheath
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托马·索米耶
达维德·赞德
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Faurecia Systemes dEchappement SAS
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021Exhaust 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
    • F01N3/023Exhaust 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
    • F01N3/027Exhaust 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 using electric or magnetic heating means
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • H01B7/292Protection against damage caused by extremes of temperature or by flame using material resistant to heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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 methods of operation; Control
    • F01N3/20Exhaust 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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/18Exhaust 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 methods of operation; Control
    • F01N3/20Exhaust 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 methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2006Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F01N3/2026Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust 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
    • F01N3/24Exhaust 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
    • F01N3/28Construction of catalytic reactors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/02Disposition of insulation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/2825Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater

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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)
  • Connector Housings Or Holding Contact Members (AREA)
  • Insulated Conductors (AREA)
  • Resistance Heating (AREA)

Abstract

本实用新型提供一种排放气体加热器,其包括至少一个电气组件(1),电子组件能够接口至部件(10)的连接端子,该电气组件包括导体线缆、与导体线缆的端部成一体且能够将导体线缆连接至端子的连接器、围绕导体线缆的护套(4)以及能够将护套(4)联接至部件(10)同时包封连接器和端子的盖帽(5),其中,导体线缆包括电绝缘且承受高温的保护部,并且,护套(4)、盖帽(5)以及护套(4)和盖帽(5)之间的接口形成对液体飞溅和流淌密封的连续包封部,以保护导体线缆及其保护部。

Description

排放气体加热器
技术领域
本实用新型涉及一种用于将电能朝经受高温(至少等于400℃)的部件 (排放气体加热器)输送或从该部件输送电能的电气组件。机动车辆用途,通常是用于排气管线的部件的用途,仍然需要防止液体飞溅和流淌的保护。
背景技术
在这种热环境下,大多数电缆,例如ISO 19642标准所定义的用于机动车辆领域的电缆,由于存在聚合物制成的组装或绝缘护套而不合格,由于这种类型的材料不能抵御这种温度。
已知通常以PTFE为基础的解决方案。然而,这些解决方案仅限于约300℃的温度,这是不够的。
在机动车辆以外的领域中,已知承受如此高温的线缆。其通常由矿物保护部进行隔绝。然而,这些通常由多孔陶瓷制成的矿物保护部在经受液体飞溅和流淌时不再能确保其主要的电绝缘功能。
实用新型内容
因此,本实用新型涉及一种排放气体加热器,其包括连接端子以及至少一个电气组件,从而确保对所述排放气体加热器的电力供应,所述电气组件用于朝经受高温的排放气体加热器输送电能,所述电气组件能够接口至所述连接端子,所述电气组件包括导体线缆、与所述导体线缆的端部成一体并将所述导体线缆连接至所述连接端子的连接器、围绕所述导体线缆的护套以及将所述护套联接至所述排放气体加热器同时包封所述连接器和所述连接端子的盖帽,其特征在于,所述导体线缆包括电绝缘且承受高温的保护部,并且,所述护套、所述盖帽以及所述护套与所述盖帽之间的接口形成对液体飞溅和流淌密封的连续包封部,以保护所述导体线缆及其保护部。
可单独使用或组合使用的具体特征或实施例如下:
-导体线缆包括多股股线,每股均包括由镍或镍合金包封的可能铜芯,
-保护部包括至少一个矿物层,其优选地由玻璃纤维、云母纤维或芳纶纤维组成,
-护套是金属的,由铝制成或优选地由不锈钢制成,
-护套是环纹状的,
-护套和盖帽之间接口的密封性由至少一个隔板实现,
-在与护套的接口处,盖帽具有与护套的轴向轮廓基本互补的轴向轮廓,
-盖帽包括两个半壳部,这两个半壳部由穿过导体线缆的轴线并穿过连接器的轴线的平面分隔开,
-两个半壳部之间的接口处的密封性由挡板实现,
-盖帽包括一体式本体以及对齐连接器和端子夹设的盖部,
在本实用新型的第二个方面中,一种排放气体加热器,其包括至少一个这种电气组件,优选地两个,从而确保其电力供应。
附图说明
通过阅读以下描述,可以更好地理解本实用新型,这些描述只是通过示例的方式给出并参考附图,其中:
图1以透视图示出了具有其连接端子的EHC。
图2以透视图示出了放置于在图1的EHC上的导体线缆、其连接器以及护套。
图3以透视图示出了图2的装置,其由盖帽补全,从而形成完整电气组件。
图4以纵向截面图示出了导体线缆、其保护部以及护套。
附图标记列表
1:电气组件,2:导体线缆,3:连接器,4:护套,5:盖帽,6:保护部, 10:部件,11:端子。
具体实施方式
参照图1-3,示出了部件10,例如用于排放气体的电加热器或EHC(英文为电加热催化器)。该部件10旨在引导能够达到980℃的温度的排放气体。因此,该部件10在运行时可以经受高温。该部件10是电气部件并因此需要电力功能。该电力供应本身通过端子11提供。部件10的内部可以达到980℃。部件10和端子11的外表面通过热传导可以达到350℃和400℃之间的温度。部件10周围的环境温度约为200℃。
本实用新型的目的是提供一种电气组件1,其用于将电能、功率或测量朝部件10输送或从部件10输送。电气组件1位于部件10外部的区域中。因此,电气组件1经受高温,可以达到和/或超过400℃。此外,其还位于经受液体飞溅的区域中。电气组件1应该能够承受这种高温以及液体飞溅和流淌。
为了传输电能,电气组件1包括导体线缆2。为了电接口至部件10的连接端子11,导体线缆2由固定至导体线缆2的端部处的连接器3延伸。该连接器能够将导体线缆2电连接至端子11。如图所示,其涉及一种连接器,该连接器压接在导体线缆2上并且包括连接装置,如孔眼。可替代地,将连接器连接到导体线缆2上的任何其他解决方案:焊接,通常通过超声波;螺丝等也是可能的。
为了保持电绝缘,导体线缆2包括保护部6,其是电绝缘的并且能够承受大于350℃且可达1000℃的高温。图4以纵向截面图示出了导体线缆2,其由其保护部6包围并且整个由护套4包围。
为了能够抵御液体飞溅和流淌,保护导体线缆2、其保护部6和端子11,电气组件1进一步包括护套4和盖帽5。护套4基本在导体线缆2的整个长度上包围该导体线缆2,该导体线缆2包括保护部6。盖帽5将护套4联接至部件10,同时包封连接器3以及连接器3所连接至的端子11,从而形成连续包封部。
护套4是连续的,以便提供浸泡密封性。
盖帽5以及护套4和盖帽5之间的接口对液体飞溅和流淌密封。
根据另一特征,导体线缆2包括多股股线。多股允许导体线缆2保持一定柔性。考虑到要输送大电流,导体线缆2的横截面介于16和50mm2之间。为了承受高温,股线中的每股均均包封有镍和/或镍合金。镍或镍合金的包封防止对由其他材料(例如铜)制成的芯的高温腐蚀。每股均可以包括铜芯。该芯可以减少到零,所有股均由镍和/或镍合金制成。考虑到大横截面,导体线缆2 包括单个导体。
根据另一个特征,保护部6基本在导体线缆2的整个长度上包封该导体线缆2。保护部6包括至少一个矿物层,优选地由玻璃纤维、玄武云母纤维或芳纶纤维制成,如
Figure DEST_PATH_GDA0003736540580000041
这种通过矿物保护部6保护导体的技术在机动车辆领域以外的其他领域中是已知的。这种保护部6使导体线缆2电绝缘并承受高温。这种保护部的缺点在于,其通常包括成形为纤维或片状的陶瓷材料,使得其对水或其他液体可渗透。因此,有必要设置外包封部,该外包封部保护导体线缆2及其保护部6免受任何液体飞溅或流淌。该外包封部包括护套4、盖帽 5及其接口。
根据另一特征,护套4是金属的,以耐高温,同时提供对液体的密封性。该金属可以是铝。优选地,该金属可以是不锈钢。
根据另一个特征,护套4还是环纹的。这种环纹结构允许赋予护套4一定变形能力并因此赋予其一定柔性,从而有利于其安装。
类似地,盖帽5是金属的,以承受高温,同时提供对液体的密封性。该金属可以是铝。优选地,该金属可以是不锈钢。
适当的是,外包封部在其不同点处实现密封性:在护套4与盖帽5的端部接口的近端端部处、在护套4的远端端部处以及在盖帽5与部件10接口的另一端部处。
护套4的远端端部处的密封性可以通过任何方式实现。该问题不那么关键了,由于与部件10及其热量的距离大大降低了温度并允许使用更常规的解决方案。
根据另一个特征,在护套4的近端端部、在护套4和盖帽5的接口处的密封性是由挡板实现。
盖帽5可以是在护套4的外部或内部。该选择取决于液体的流淌方向。例如,如果护套4朝上起始,则优选的是护套4位于外部并覆盖盖帽5。如果护套4朝下起始,则优选的是护套4位于内部并被盖帽5覆盖。
根据另一个特征,盖帽5在与护套4的接口处具有与护套4的轴向轮廓基本互补的轴向轮廓。因此,如果护套4是环纹的,则盖帽5可以具有互补的轴向轮廓,即与护套4的轮廓负反的环纹轮廓。可替代地,盖帽5可以具有基本互补的轴向轮廓,即,例如,与护套4的两个环纹之间的每个凹陷部对齐地包括圆形片板的轮廓,从而凹入所述凹陷部中。
根据另一个特征,护套4和盖帽5之间的接口包括夹持颈圈。
根据具有颈圈的该实施例,盖帽5优选地位于护套4的内部。颈圈因此将护套4夹持在盖帽5的对应套节上。
在盖帽5中与部件10的接口处的另一端部处的密封性可以通过任何合适方式实现。因此,优选的是,对于护套4和盖帽5之间的接口采用上述实施例 (挡板或颈圈)中的一个实施例。
该部件10包括例如围绕端子11的套节13。
套节13是圆柱形的。
端子11沿着套节13的中心轴线延伸。
套节13被刚性地固定于部件10的外表面上。
盖帽5具有自由边缘14,其与套节13协作以将盖帽5固定至部件10。
自由边缘14被设置围绕套节13。作为变型,自由边缘14被接合在套节 13的内部。
自由边缘14具有与套节13互补的形状,II通过未示出的颈圈或夹子固定到套节13。
根据另一个特征,盖帽5包括两个半壳部。例如,这些半壳部被通过导体线缆2的轴线并通过连接器3的轴线,即通过端子11的轴线的平面分隔开。这种实施例简化了盖帽5的组装,由于其在两个半壳部之间在一个端部处夹紧护套4并且在另一端部处夹紧部件10的套节。
根据具有两个半壳部的该实施例,盖帽5优选地位于护套4和部件10的套节的外部。两个半壳部的组装通过夹紧护套4和部件10的套节来实现,以实现密封性。
根据另一个特征,两个半壳部之间的接口处的密封性由隔板实现。这种隔板确保了对液体飞溅和流淌的密封性。盖帽5还被成型为在液体通过半壳部之间的接合平面渗透到内部的情况下,所产生的液体流动以周壁的方式实现且不能到达保护部6。
可替代地,根据另实施例(未显示),盖帽5包括一体式本体。为了能够实现连接器3与端子11的组装,该本体穿设与连接器3对齐并且基本上沿端子11的轴线的孔口。这种孔口允许至少一个工具通过以将连接器3放置在端子11上并确保其固定。因此,如果如图所示,端子11具有设置有肩部的螺纹杆并且连接器3包括能够抵靠肩部接合在所述螺纹杆上的孔眼,则可以通过拧固在螺纹杆上的螺母来确保将所述孔眼夹靠肩部。该孔口允许螺丝/夹持扳手通过。
为了密封地封闭孔口,盖帽5由盖子补全,该盖子有利地对齐连接器3 和端子11夹设于所述孔口中。
根据该第二实施例,其中盖帽5包括一体式本体,在护套4和盖帽5之间的接口处的安装通过力实现。这也适用于盖帽5和部件10的套节之间的接口处的安装。
本实用新型可以应用于经受高温的任何部件10。
因此,本实用新型进一步涉及一种排放气体加热器10,其包括至少一个这种电气组件1。为了确保对这种电加热器10的两相电力供应,优选的是使用两个这种电气组件1,以提供两个导体线缆2。
本实用新型还涉及一种包括至少一个这种排放气体加热器10的机动车辆。
本实用新型已在附图和前面的描述中进行了详细说明和描述。该描述应被视为说明性的并以举例的方式给出,而不是将本实用新型仅限制在这些说明中。许多变型例都是可能的。

Claims (11)

1.一种排放气体加热器(10),其包括连接端子(11)以及至少一个电气组件(1),从而确保对所述排放气体加热器的电力供应,所述电气组件(1)用于朝经受高温的排放气体加热器(10)输送电能,所述电气组件(1)能够接口至所述连接端子(11),所述电气组件(1)包括导体线缆(2)、与所述导体线缆(2)的端部成一体并将所述导体线缆(2)连接至所述连接端子(11)的连接器(3)、围绕所述导体线缆(2)的护套(4)以及将所述护套(4)联接至所述排放气体加热器(10)同时包封所述连接器(3)和所述连接端子(11)的盖帽(5),
其特征在于,所述导体线缆(2)包括电绝缘且承受高温的保护部(6),并且,所述护套(4)、所述盖帽(5)以及所述护套(4)与所述盖帽(5)之间的接口形成对液体飞溅和流淌密封的连续包封部,以保护所述导体线缆(2)及其保护部(6)。
2.根据权利要求1所述的排放气体加热器(10),其特征在于,所述导体线缆(2)包括多股股线,每股股线均包括被镍或镍合金包封的铜芯。
3.根据权利要求1或2所述的排放气体加热器(10),其特征在于,所述保护部(6)包括至少一个矿物层。
4.根据权利要求1或2所述的排放气体加热器(10),其特征在于,所述护套(4)是金属的。
5.根据权利要求1或2所述的排放气体加热器(10),其特征在于,所述护套(4)环纹的。
6.根据权利要求1或2所述的排放气体加热器(10),其特征在于,在所述护套(4)和所述盖帽(5)之间的所述接口处的密封性由至少一个挡板实现。
7.根据权利要求6所述的排放气体加热器(10),其特征在于,所述盖帽(5)在与所述护套(4)的所述接口处具有与所述护套(4)的轴向轮廓基本互补的轴向轮廓。
8.根据权利要求1或2所述的排放气体加热器(10),其特征在于,所述盖帽(5)包括两个半壳部,所述两个半壳部被通过所述导体线缆(2)的轴线并通过所述连接器(3)的轴线的平面分隔开。
9.根据权利要求8所述的排放气体加热器(10),其特征在于,所述两个半壳部之间的接口处的密封性通过隔板实现。
10.根据权利要求1或2所述的排放气体加热器(10),其特征在于,所述盖帽(5)包括一体式本体以及对齐所述连接器(3)和所述连接端子(11)夹设的盖子。
11.根据权利要求1或2所述的排放气体加热器(10),其特征在于,所述排放气体加热器(10)包括围绕所述连接端子(11)的套节(13),所述盖帽(5)具有自由边缘(14),所述自由边缘与所述套节(13)协作以将盖帽(5)密封地固定至所述排放气体加热器(10)。
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