JPH0711245B2 - Catalytic converter - Google Patents
Catalytic converterInfo
- Publication number
- JPH0711245B2 JPH0711245B2 JP63028050A JP2805088A JPH0711245B2 JP H0711245 B2 JPH0711245 B2 JP H0711245B2 JP 63028050 A JP63028050 A JP 63028050A JP 2805088 A JP2805088 A JP 2805088A JP H0711245 B2 JPH0711245 B2 JP H0711245B2
- Authority
- JP
- Japan
- Prior art keywords
- catalyst carrier
- mat
- seal
- flange
- split casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
-
- 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
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
Landscapes
- 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)
Description
【発明の詳細な説明】 （従来の技術） 断面円形又は長円形のモノリス型の触媒担体にシールマ
ットを巻き付け、これを分割ケーシングで挾んで各ケー
シングのフランジ同士を溶接したものは、従来特公昭
55−14250、同61−22124、特開昭59−138715等によ
って知られている。DETAILED DESCRIPTION OF THE INVENTION (Prior Art) A monolith type catalyst carrier having a circular or oval cross section, around which a seal mat is wrapped, is sandwiched between divided casings, and flanges of the respective casings are welded to each other.
55-14250, 61-22124, and JP-A-59-138715.
これらの従来技術は、例えば第４図に示すようにセラミ
ック製又は金属箔製の触媒担体ａに、鉱物質又はセラミ
ックの繊維、金属繊維又はワイヤ等からなるシールマッ
トｂを積層し、上下の分割ケーシングc,dで挾んでその
結合フランジc1とd1を溶接するものである。そして、前
記，においては、緩衝材ｂを、触媒担体ａとケーシ
ングc,dとの間隙量よりも厚く捲回し、分割ケーシング
c,dで圧縮して閉じ込めるものであり、前記は、シー
ルマットｂを触媒担体ｂに積層した後、該間隙量と等し
い厚さに圧縮し、しかるのち分割ケーシングを合掌結合
するものである。In these conventional techniques, for example, as shown in FIG. 4, a catalyst support a made of ceramic or metal foil is laminated with a seal mat b made of mineral or ceramic fiber, metal fiber or wire, and divided into upper and lower parts. It is sandwiched between casings c and d to weld the connecting flanges c 1 and d 1 . In the above, the cushioning material b is wound thicker than the gap amount between the catalyst carrier a and the casings c and d to form a split casing.
This is to compress and confine with c and d. The above is to stack the seal mat b on the catalyst carrier b and then compress it to a thickness equal to the gap amount, and then jointly divide the split casings.
（発明が解決しようとする問題点） 前記の従来技術，においては、分割ケーシングc,d
でシールマットｂを圧縮するため、第４図（ａ）に示す
ようにフランジc1,d1近くの緩衝材は該フランジ面には
み出して噛込まれ、フランジ間に間隙Ａが生じ易く、こ
のような状態になると溶接も不完全になり易い。また、
前記においては、第４図（ｂ）に示すようにフランジ
の基部に形成される円弧部ｒによってＶ形の空間が形成
されるため、該空間にシールマットｂの若干のたるみ部
分が押込まれるが、その内外に間隙B1,B2が残り、ここ
から未処理ガスがバイパスするおそれがある。(Problems to be Solved by the Invention) In the above-mentioned related art, the divided casings c and d are used.
Since the seal mat b is compressed by, the cushioning material near the flanges c 1 and d 1 sticks out and is caught in the flange surface as shown in FIG. In such a state, welding is likely to be incomplete. Also,
In the above, as shown in FIG. 4 (b), since the V-shaped space is formed by the arcuate portion r formed at the base of the flange, a slight slack portion of the seal mat b is pushed into the space. However, the gaps B 1 and B 2 remain inside and outside, and the untreated gas may bypass from there.
更に、この触媒担体ａは機械的に弱いため、組付時に圧
力が局部的に集中する部分があると、セラミック製のも
のはその部分で破損し易く、金属箔製のものは変形し易
い。このため、前記，のものは分割ケースの結合工
程で、また前記のものはシールマットの圧縮工程で触
媒担体ａを破壊又は変形させるおそれがある。Furthermore, since the catalyst carrier a is mechanically weak, if there is a portion where the pressure is locally concentrated during assembly, the ceramic one is easily damaged at that portion and the metal foil one is easily deformed. For this reason, the above items may destroy or deform the catalyst carrier a in the step of joining the divided cases and the above item in the step of compressing the seal mat.
したがって、本発明はこれらの問題点を解決すると共
に、極めて容易に組立てることができる触媒コンバータ
を得ることを課題とする。Therefore, an object of the present invention is to solve these problems and to obtain a catalytic converter that can be assembled very easily.
（課題を解決するための手段） 本発明は、前記の課題を解決するために、円形又は長円
形の断面形状とこの断面と交わる無数の微細なガス通路
をもつ、モノリス型の触媒担体を、シールマットを介装
して、ガス流通方向に沿う結合フランジをもつ分割ケー
シング内に装入し、各結合フランジを溶接した触媒コン
バータにおいて、前記結合フランジの少なくとも一方の
半径方向内側に、分割ケーシングの内面に連続する段部
を設け、シールマットの端部をこの段部内に屈曲して収
容し、各分割ケーシングの内面にシールマットを接着し
て触媒担体の保持面を圧縮成形し、この分割ケーシング
を触媒担体に重ねて対向するシールマットの端部同士を
密着させ、かつ各結合フランジを溶接したことを特徴と
する。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a monolithic catalyst carrier having a circular or oval cross-sectional shape and a myriad of fine gas passages intersecting this cross-section, In a catalytic converter in which a sealing mat is provided and is inserted into a split casing having a connecting flange along the gas flow direction, and the connecting flanges are welded to each other, at least one of the connecting flanges is radially inwardly provided with the split casing. A continuous step is provided on the inner surface, the end of the seal mat is bent and accommodated in this step, and the seal mat is adhered to the inner surface of each split casing to compression-mold the holding surface of the catalyst carrier. Is superposed on the catalyst carrier, the ends of the opposing seal mats are brought into close contact with each other, and each coupling flange is welded.
（作 用） さして、前記の手段により、シールマットは、触媒担体
外面と近似する内面形状をもつ保持面を備えるから、該
分割ケーシングを合掌結合したとき、触媒担体に対し局
部的に大きな加圧力を発生させることがない。また、フ
ランジの段部外端でシールマットの端面の外向き移動を
阻止して端部がフランジ内に噛込まれるのを防止すると
共に、フランジの合わせ部に空隙が生じるのを防止す
る。(Operation) By the means described above, the seal mat is provided with the holding surface having an inner surface shape similar to the outer surface of the catalyst carrier. Therefore, when the divided casings are joined together, a large pressure is locally applied to the catalyst carrier. Does not occur. Further, the outer end of the step portion of the flange prevents outward movement of the end surface of the seal mat to prevent the end portion from being caught in the flange, and also prevents a gap from being formed in the mating portion of the flange.
（実施例） 以下図面に基づいて実施例を説明する。第１図及び第２
図において１はケーシング、2,3は該ケーシング１を形
成する上下の分割ケーシング、４はモノリス型の触媒担
体、5,6はシールマットであり、該シールマット5,6はセ
ラミック繊維、金属繊維又はワイヤ等をマット状にした
もので、触媒担体４をケース内に保持すると共にガスの
流通を阻止するものである。(Examples) Examples will be described below with reference to the drawings. 1 and 2
In the figure, 1 is a casing, 2 and 3 are upper and lower split casings forming the casing 1, 4 is a monolith type catalyst carrier, 5 and 6 are seal mats, and the seal mats 5 and 6 are ceramic fibers and metal fibers. Alternatively, a wire or the like is formed into a mat shape, which holds the catalyst carrier 4 in the case and blocks the flow of gas.
分割ケーシング2,3、は分割線に沿って両側にそれぞれ
Ｌ型の段部2a,3aとここからのびるフランジ2b,3bを備え
ており、下方のフランジ3bは上方のフランジ2bよりも長
い。各分割ケーシングの内面には仮想線５′,6′で示す
シールマット5,6が貼着され、該マットは、触媒担体の
半部と略等しい曲面とそれに連らなる平面をもつ押型で
プレスすることによりケーシング１と触媒担体４の間隙
に近い厚さｔに圧縮成形され、保持面5a,6aにより適度
の支持力と気密性をもつようにされ、端部5b,6bは段部2
a,3a内に充満した状態になる。そして、第２図（ｂ）に
示すように両分割ケーシングで触媒担体４を挾んで溶接
7,7を施すことにより触媒コンバータが構成される。The split casings 2 and 3 are provided with L-shaped step portions 2a and 3a and flanges 2b and 3b extending from the split casings 2 and 3a on both sides along the dividing line, and the lower flange 3b is longer than the upper flange 2b. Seal mats 5 and 6 indicated by imaginary lines 5'and 6'are attached to the inner surface of each divided casing, and the mat is pressed by a pressing die having a curved surface substantially equal to the half of the catalyst carrier and a flat surface continuous with the curved surface. By doing so, compression molding is performed to a thickness t close to the gap between the casing 1 and the catalyst carrier 4, and the holding surfaces 5a and 6a have appropriate supporting force and airtightness, and the end portions 5b and 6b are stepped portions 2.
It becomes full in a and 3a. Then, as shown in FIG. 2 (b), the catalyst carrier 4 is sandwiched and welded by both split casings.
A catalytic converter is constructed by applying steps 7 and 7.
以上により、シールマット5,6の保持面5a,6aは触媒担体
４の外面と略一致するため、組付けに際して触媒担体４
に局部的に大きな圧力を及ぼすようなことはなく、触媒
担体４を破損することは防止される。更にシールマット
5,6の端部5b,6bは段部2a,3a内を満たしているから、そ
の内外面に生じる空隙8,9は極めて小さいものとなり、
未処理ガスのバイパスは防止される。As described above, the holding surfaces 5a and 6a of the seal mats 5 and 6 are substantially coincident with the outer surface of the catalyst carrier 4, so that the catalyst carrier 4 can be easily assembled.
Therefore, a large pressure is not locally applied to the catalyst carrier 4, and the catalyst carrier 4 is prevented from being damaged. Further seal mat
Since the end portions 5b, 6b of 5, 6 fill the inside of the step portions 2a, 3a, the voids 8, 9 generated on the inner and outer surfaces thereof are extremely small,
Untreated gas bypass is prevented.
次に第３図、（ａ），（ｂ）により他の実施例を説明す
る。Next, another embodiment will be described with reference to FIGS. 3, (a) and (b).
この実施例においては、分割ケーシング10には一方の縁
に段部10aとフランジ10bが設けられ、他方の縁にフラン
ジ10cのみが設けられ、分割ケーシング11には、前記段
部10a,フランジ10bに対向してフランジ11cが設けられ、
他方には段部11aとフランジ11bが設けられる。In this embodiment, the split casing 10 is provided with a step 10a and a flange 10b on one edge, and only the flange 10c is provided on the other edge, and the split casing 11 has the step 10a and the flange 10b. A flange 11c is provided facing each other,
On the other side, a step portion 11a and a flange 11b are provided.
そして、前記実施例と同様にシールマット12,13が貼着
の上厚さｔに圧縮成形されて保持面12a,13aが形成され
るが、各マットの一方の端部12b,13bは段部10a,11a内に
圧入され、他方の端部12c,13cは、フランジ10c,11cの面
と等高か又は僅かの寸法ｈだけ突出するようにされてい
る。この分割ケーシングによって第３図（ｂ）に示すよ
うに触媒担体４を挾んでフランジに溶接14,14を施すこ
とにより触媒コンバータが構成される。Then, the sealing mats 12 and 13 are compression-molded to the upper thickness t of the adhesive to form the holding surfaces 12a and 13a in the same manner as in the above embodiment, but one end 12b and 13b of each mat is a stepped portion. The other ends 12c and 13c are press-fitted into the flanges 10a and 11a, and the other ends 12c and 13c are flush with the surfaces of the flanges 10c and 11c or project a small dimension h. As shown in FIG. 3 (b), the divided casing sandwiches the catalyst carrier 4 and welds 14, 14 to the flange to form a catalytic converter.
この実施例においても、シールマットに12,13は触媒担
体外形どおりの保持面12a,13aに圧縮成形されているの
で、該担体に均一の保持力を及ぼして保持し、また端部
12b,13bに対し他方の端部12c,13cが屈曲することなく当
接するので、当接部付近に大きな空隙が生じることがな
く、バイパス通路の形成が防止される。Also in this embodiment, since the seal mats 12 and 13 are compression-molded on the holding surfaces 12a and 13a having the same outer shape as the catalyst carrier, the carrier has a uniform holding force to hold the carrier,
Since the other end portions 12c and 13c abut against the 12b and 13b without bending, a large gap is not formed in the vicinity of the abutting portion, and the formation of the bypass passage is prevented.
（発明の効果） 以上のように、本発明は、シールマットを分割ケーシン
グ側に取付けた上で触媒担体外形に近似するように予め
圧縮成形するから、触媒担体をケーシング内に組付ける
際に、触媒担体に局部的に強い力が作用して破損を招く
ようなことはなく、かつ取付け後は均一な保持力を及ぼ
すことができる。(Effects of the Invention) As described above, according to the present invention, since the seal mat is attached to the split casing side and compression-molded in advance so as to approximate the outer shape of the catalyst carrier, when assembling the catalyst carrier in the casing, A strong force does not act locally on the catalyst carrier to cause damage, and a uniform holding force can be exerted after attachment.
また、触媒担体を組付ける際に、シールマットの対向す
る端部の少なくとも一方は屈曲して段部内に収容されて
いるから、分割ケーシングをつき合わせたとき、シール
マットの各端部は、該段部内でつき合わされた状態で圧
縮されるためはみ出すことが防止され、シールマットを
ケーシングのフランジに噛込んでフランジの密着を妨げ
たり、フランジ付近においてガスのバイパスが生じる空
隙が形成されたりするのを防止することができる。Further, at the time of assembling the catalyst carrier, at least one of the opposite ends of the seal mat is bent and accommodated in the step, so that when the divided casings are butted, each end of the seal mat is It is prevented from protruding because it is compressed in the stepped state in abutting state, the seal mat is caught in the casing flange to prevent the flange from sticking to each other, and a void is formed near the flange that causes gas bypass. Can be prevented.
第１図は本発明の一実施例の縦断面図、第２図（ａ）は
第１図II−II線に沿う分解断面図、同図（ｂ）は同じく
組立断面図、第３図（ａ）は他の実施例の分解断面図、
同図（ｂ）は同じく組立断面図、第４図（ａ），（ｂ）
は従来例を示す断面図である。 2,3,10,11……分割ケーシング 2a,3a,10a,11a……段部 ４……触媒担体 5,6,12,13……シールマット 5a,6a,12a,13a……保持面1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 (a) is an exploded sectional view taken along the line II-II in FIG. 1, FIG. 2 (b) is an assembled sectional view, and FIG. a) is an exploded sectional view of another embodiment,
The same figure (b) is an assembled sectional view, FIG. 4 (a), (b).
[FIG. 7] is a cross-sectional view showing a conventional example. 2,3,10,11 …… Split casing 2a, 3a, 10a, 11a …… Step 4 …… Catalyst carrier 5,6,12,13 …… Seal mat 5a, 6a, 12a, 13a …… Holding surface
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−138715（ＪＰ，Ａ) 実願 昭54−159951号（実開 昭56− 77607号）の願書に添付した明細書及び図 面の内容を撮影したマイクロフィルム（Ｊ Ｐ，Ｕ) 実願 昭47−85108号（実開 昭49− 42314号）の願書に添付した明細書及び図 面の内容を撮影したマイクロフィルム（Ｊ Ｐ，Ｕ) 実願 昭55−57828号（実開 昭56− 159608号）の願書に添付した明細書及び図 面の内容を撮影したマイクロフィルム（Ｊ Ｐ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Application Laid-Open No. 59-138715 (JP, A) Japanese Patent Application No. 54-159951 (Japanese Utility Model Application No. 56-77607) Microfilm (JP, U) Photographed of the Contents Microfilm (JP, U, U) of the specification and drawings attached to the application for Japanese Patent Application No. 47-85108 (No. 49-42314) ) A microfilm (JP, U) obtained by photographing the contents and drawings attached to the application of Japanese Utility Model Application No. 55-57828 (Japanese Utility Model Application No. 56-159608).
Claims (1)
わる無数の微細なガス通路をもつ、モノリス型の触媒担
体を、シールマットを介装して、ガス流通方向に沿う結
合フランジをもつ分割ケーシング内に装入し、各結合フ
ランジを溶接した触媒コンバータにおいて、前記結合フ
ランジの少なくとも一方の半径方向内側に、分割ケーシ
ングの内面に連続する段部を設け、シールマットの端部
をこの段部内に屈曲して収容し、各分割ケーシングの内
面にシールマットを接着して触媒担体の保持面を圧縮成
形し、この分割ケーシングを触媒担体に重ねて対向する
シールマットの端部同士を密着させ、かつ各結合フラン
ジを溶接したことを特徴とする触媒コンバータ。1. A monolithic catalyst carrier having a circular or elliptical cross-sectional shape and a myriad of fine gas passages intersecting with this cross-section, with a sealing mat interposed and a coupling flange along the gas flow direction. In a catalytic converter that is charged in a split casing and welded to each coupling flange, a step portion that is continuous with the inner surface of the split casing is provided inside at least one of the coupling flanges in the radial direction, and the end portion of the seal mat is provided at this step. It is bent and accommodated in the part, the seal mat is adhered to the inner surface of each split casing to compression-mold the holding surface of the catalyst carrier, and the split casing is overlapped with the catalyst carrier so that the opposite end portions of the seal mat are brought into close contact with each other. And a catalytic converter characterized in that each coupling flange is welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63028050A JPH0711245B2 (en) | 1988-02-09 | 1988-02-09 | Catalytic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63028050A JPH0711245B2 (en) | 1988-02-09 | 1988-02-09 | Catalytic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01203610A JPH01203610A (en) | 1989-08-16 |
| JPH0711245B2 true JPH0711245B2 (en) | 1995-02-08 |
Family
ID=12237927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63028050A Expired - Fee Related JPH0711245B2 (en) | 1988-02-09 | 1988-02-09 | Catalytic converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0711245B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013021800A1 (en) * | 2011-08-05 | 2013-02-14 | ニチアス株式会社 | Retainer for gas processing device, gas processing device, and manufacturing methods therefor |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04334719A (en) * | 1991-05-07 | 1992-11-20 | Yutaka Giken Co Ltd | Assembling method for catalytic conerter |
| SE522537C2 (en) * | 2000-03-21 | 2004-02-17 | Kemira Metalkat Oy | Catalyst support with jacket |
| DE102007028326A1 (en) * | 2007-06-15 | 2008-12-18 | J. Eberspächer GmbH & Co. KG | Exhaust gas treatment device |
| EP2037092B1 (en) * | 2007-09-11 | 2011-07-27 | Scambia Industrial Developments AG | Components for an exhaust gas system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4942314U (en) * | 1972-07-19 | 1974-04-13 | ||
| JPS5677607U (en) * | 1979-11-20 | 1981-06-24 | ||
| JPS6032336Y2 (en) * | 1980-04-26 | 1985-09-27 | ダイハツ工業株式会社 | Outer cover device for exhaust gas purification device in internal combustion engine |
| JPH0615816B2 (en) * | 1983-01-28 | 1994-03-02 | 本田技研工業株式会社 | Assembling method of catalyst converter |
-
1988
- 1988-02-09 JP JP63028050A patent/JPH0711245B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013021800A1 (en) * | 2011-08-05 | 2013-02-14 | ニチアス株式会社 | Retainer for gas processing device, gas processing device, and manufacturing methods therefor |
| JPWO2013021800A1 (en) * | 2011-08-05 | 2015-03-05 | ニチアス株式会社 | Retaining material for gas processing apparatus, gas processing apparatus and manufacturing method thereof |
| US9759112B2 (en) | 2011-08-05 | 2017-09-12 | Nichias Corporation | Retainer for gas processing device, gas processing device, and manufacturing methods therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01203610A (en) | 1989-08-16 |
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