JPH0569319U - Exhaust gas purification metal carrier - Google Patents
Exhaust gas purification metal carrierInfo
- Publication number
- JPH0569319U JPH0569319U JP10077591U JP10077591U JPH0569319U JP H0569319 U JPH0569319 U JP H0569319U JP 10077591 U JP10077591 U JP 10077591U JP 10077591 U JP10077591 U JP 10077591U JP H0569319 U JPH0569319 U JP H0569319U
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb body
- exhaust gas
- outer cylinder
- metal carrier
- metal
- 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.)
- Withdrawn
Links
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- Exhaust Gas After Treatment (AREA)
Abstract
(57)【要約】
【目的】 本考案は外筒近傍のハニカム体の温度勾配を
ゆるめ、かつ触媒効果の低下を防ぐことができる排ガス
浄化用メタル担体を提供する。
【構成】 金属より成る平箔と波箔を重ね、積層又は渦
巻状に巻回して成形したハニカム体を、金属製外筒に挿
入して構成するメタル担体において、ハニカム体の排ガ
ス出側端面より１mm以上の間隔を構成する位置に、前記
ハニカム体外周部分の平箔及び波箔の一層乃至複数層と
重複する幅を有するリング状突起を設けたことを特徴と
する排気ガス浄化用メタル担体である。
(57) [Summary] [Object] The present invention provides an exhaust gas purifying metal carrier capable of relaxing the temperature gradient of the honeycomb body near the outer cylinder and preventing a decrease in the catalytic effect. [Structure] A flat carrier and a corrugated foil made of metal are stacked, and a honeycomb body formed by stacking or winding in a spiral shape is inserted into a metal outer cylinder. A metal carrier for purifying exhaust gas, characterized in that ring-shaped projections having a width overlapping with one or more layers of the flat foil and the corrugated foil of the outer peripheral portion of the honeycomb body are provided at positions forming an interval of 1 mm or more. is there.
Description
【０００１】[0001]
本考案は、自動車等のエンジン排ガス系に設置し、排ガスを浄化する触媒を保 持するためのメタル担体に関するものである。 The present invention relates to a metal carrier which is installed in an engine exhaust gas system such as an automobile and holds a catalyst for purifying exhaust gas.
【０００２】[0002]
自動車のエンジン排ガスを浄化するするために用いるメタル担体は、圧損、耐 熱性および搭載性などの優れた特性を備えており、近時、その採用が増大しつつ ある。 Metal carriers used for purifying automobile engine exhaust gas have excellent properties such as pressure loss, heat resistance, and mountability, and their use is increasing recently.
【０００３】 従来メタル担体は、図５に示すように、金属製の平箔１とこれを波加工した波 箔２とを重ね合わせ、渦巻状に巻回せしめてハニカム体３を形成し、このハニカ ム体３を金属製の外筒４に挿入して構成される。図６に示すように、この外筒４ は接続管５と連続固定され、接続管５に設けたフランジ６を排ガス系に接続して 自動車エンジン排ガス系に搭載される。ハニカム体を構成する平箔と波箔の接触 部はロウ材或いは拡散処理などによって固定され、又同図に示すようにハニカム 体３の外周と外筒１の内周も、通常ロウ材７により接合固定している。In a conventional metal carrier, as shown in FIG. 5, a flat metal foil 1 and a corrugated metal foil 2 which have been wave-processed are superposed and spirally wound to form a honeycomb body 3. The honeycomb body 3 is formed by inserting it into an outer cylinder 4 made of metal. As shown in FIG. 6, the outer cylinder 4 is continuously fixed to the connecting pipe 5, and the flange 6 provided on the connecting pipe 5 is connected to the exhaust gas system to be mounted on the automobile engine exhaust gas system. The contact portion between the flat foil and the corrugated foil forming the honeycomb body is fixed by a brazing material or a diffusion treatment, and as shown in the figure, the outer periphery of the honeycomb body 3 and the inner periphery of the outer cylinder 1 are also normally brazed. Bonded and fixed.
【０００４】 ハニカム体には、その軸方向に平箔と波箔により区切られて連通するセルが形 成され、これらの表面には触媒金属が担持されており、ハニカム体に進入する排 気ガスは、連通セルに流入し触媒金属と接触して改質されながらながら通過排出 される。In the honeycomb body, cells are formed in the axial direction which are separated by a flat foil and a corrugated foil and communicate with each other, and catalytic metals are carried on the surfaces of the cells, and exhaust gas entering the honeycomb body is discharged. Is discharged while passing through the communication cell, coming into contact with the catalytic metal and being reformed.
【０００５】 エンジンから排出される排気ガスは、自動車の始動、走行、停止時において温 度が異なる。即ち、始動時には急激に昇温し、ブレーキ時や停車の際には急速に 降温するように、運転中の排気ガス系においては急熱−急冷の熱サイクルが繰り 返されることになる。この様な環境に搭載されたメタル担体には、それを構成す る平箔と波箔に膨脹・収縮が繰り返されて応力が発生すると共に、特に外気に晒 されている外筒と、これとリジッドに固定されているハニカム体間では、伝熱抵 抗が小さいため外筒近傍のハニカム体から外筒を通じて外部への熱放散が大きく 、そのために図６の点線Ａに示すように外筒近傍のハニカム体内に急峻な温度勾 配が形成されることと相俟って、その熱応力のためにハニカム体の外筒近傍に破 壊が発生しやすくなり、耐用寿命が短くなるという問題が起こる。Exhaust gas emitted from the engine has different temperatures during starting, running, and stopping of the vehicle. That is, a rapid heat-quenching heat cycle is repeated in the exhaust gas system during operation so that the temperature rises sharply at the time of start-up and rapidly drops at the time of braking or stopping. In a metal carrier mounted in such an environment, stress is generated due to repeated expansion and contraction of the flat foil and the corrugated foil that make up the metal carrier, and the outer cylinder that is particularly exposed to the outside air and this. Since the heat transfer resistance is small between the honeycomb bodies fixed to the rigid body, heat is largely dissipated from the honeycomb body near the outer cylinder to the outside through the outer cylinder. Therefore, as shown by the dotted line A in FIG. Combined with the formation of a steep temperature gradient in the honeycomb body, the thermal stress easily causes rupture near the outer cylinder of the honeycomb body, resulting in a problem that the useful life is shortened. .
【０００６】 この様なことから、例えば図７に示すようにハニカム体３の外周と外筒４の内 周を非接合とし、外筒４内周の軸方向両端部に、ハニカム体３の端面８，８′と の間に僅かな間隙９を設け或いは設けずしてリング状の支持部材１０，１０′を 固定して、ハニカム体３の軸方向および半径方向共に外筒でリジッドに拘束され ないようにした熱応力緩和構造のメタル担体ガ提案されている。 しかしながら、前記メタル担体では、自動車の振動等によりハニカム体３が支 持部材１０，１０′に衝突し、構成する箔に損傷を与えることがあると共に支持 部材１０，１０′に覆われているハニカム体部分には、排ガスが流れないために 触媒が機能せず、全体的に触媒効果が小さくなるという問題があるFrom the above, for example, as shown in FIG. 7, the outer periphery of the honeycomb body 3 and the inner periphery of the outer cylinder 4 are not joined, and the end faces of the honeycomb body 3 are formed at both axial ends of the inner periphery of the outer cylinder 4. A ring-shaped support member 10, 10 'is fixed with or without a slight gap 9 provided between the honeycomb body 3 and the honeycomb body 3 and is rigidly constrained by an outer cylinder in both the axial direction and the radial direction. There has been proposed a metal carrier having a thermal stress relaxation structure that does not have to be used. However, in the above metal carrier, the honeycomb body 3 may collide with the supporting members 10 and 10 'due to vibration of an automobile or the like to damage the foil constituting the honeycomb body and the honeycomb covered with the supporting members 10 and 10'. Since the exhaust gas does not flow in the body part, the catalyst does not function, and there is a problem that the catalytic effect becomes small as a whole.
【０００７】[0007]
本考案は上記した問題点を解決するものであって、外筒近傍のハニカム体の温 度勾配をゆるめ、かつ触媒効果の低下を防ぐことができる排ガス浄化用メタル担 体を提供することを目的とする。 The present invention solves the above-mentioned problems, and an object thereof is to provide an exhaust gas purifying metal carrier capable of loosening the temperature gradient of the honeycomb body near the outer cylinder and preventing a decrease in the catalytic effect. And
【０００８】[0008]
上記目的を達成するための本考案は、金属より成る平箔と波箔を重ね、積層又 は渦巻状に巻回して成形したハニカム体を、金属製外筒に挿入して構成するメタ ル担体において、ハニカム体の排ガス出側端面より１mm以上の間隔を構成する位 置に、前記ハニカム体外周部分の平箔及び波箔の一層乃至複数層と重複する幅を 有するリング状突起を設けたことを特徴とする排気ガス浄化用メタル担体である 。 本考案における上記リング状突起は、ハニカム体端面より延長させた外筒の内 周面に固定してもよく、また、外筒に固定している接続管拡管部の内周面に固定 して設置することができる。 MEANS TO SOLVE THE PROBLEM The present invention for achieving the above object is a metal carrier formed by inserting a flat metal foil and a corrugated foil, which are stacked, or wound into a spiral shape into a metal outer cylinder to insert the honeycomb body. In the above, a ring-shaped projection having a width overlapping with one or more layers of the flat foil and the corrugated foil in the outer peripheral portion of the honeycomb body is provided at a position forming a distance of 1 mm or more from the exhaust gas outlet side end face of the honeycomb body. Is a metal carrier for exhaust gas purification. The ring-shaped projection in the present invention may be fixed to the inner peripheral surface of the outer cylinder extending from the end face of the honeycomb body, or may be fixed to the inner peripheral surface of the connecting pipe expanding portion fixed to the outer cylinder. Can be installed.
【０００９】 以下に本考案を図に示す実施例に基づいて詳細に説明する。 図１は本考案の一例を示すものであり、平箔と波箔を巻回して形成したハニカ ム体３は、外筒４に収納し、ハニカム体３の外周と外筒４の内周は、部分的にロ ウ材７で接合し固定されている。ハニカム体３の構成は、平箔と波箔を渦巻き状 に巻回するだけでなく、両箔を積層したものを用いてもよい。また、ハニカム体 ３と外筒４との接合は、ロウ材以外にも拡散接合やその他の手段で行うことが可 能であり、接合面は全面であっても支障ないが、図示のように中間部分にするこ とが好ましい。外筒４の上端および後端は、それぞれ前方接続管５ａおよび後方 接続管５ｂに接続しており、本考案では、後方接続管５ｂの拡管部５ｗの内周で あって、ハニカム体の排ガス出側端面８より１mm以上離れた位置に、リング状突 起１１を設置する。リング状突起１１の幅は、ハニカム体３の最外周より１〜数 層（巻き）の幅、すなわち温度勾配の大きい部分をカバーする範囲となるように する。The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows an example of the present invention. A honeycomb body 3 formed by winding flat foil and corrugated foil is housed in an outer cylinder 4, and the outer circumference of the honeycomb body 3 and the inner circumference of the outer cylinder 4 are , Partially joined and fixed with a raw material 7. As the configuration of the honeycomb body 3, not only the flat foil and the corrugated foil are spirally wound, but also a laminate of both foils may be used. In addition, the honeycomb body 3 and the outer cylinder 4 can be joined by diffusion joining or other means other than the brazing material, and there is no problem even if the entire joining surface is used. It is preferably in the middle part. The upper end and the rear end of the outer cylinder 4 are connected to the front connecting pipe 5a and the rear connecting pipe 5b, respectively, and in the present invention, they are the inner periphery of the expanded pipe portion 5w of the rear connecting pipe 5b, and the exhaust gas discharge of the honeycomb body. The ring-shaped protrusion 11 is installed at a position 1 mm or more away from the side end face 8. The width of the ring-shaped protrusion 11 is set to be a width of one to several layers (winding) from the outermost periphery of the honeycomb body 3, that is, a range that covers a portion having a large temperature gradient.
【００１０】 本考案はこの様な構成とすることにより、前方接続管５ａより進入してきた高 温排ガスがハニカム体３を通過する際に、その外周側のセルを通過する排ガスは ハニカム体３の出側に設置したリング状突起１１により邪魔されて緩流となり、 セル内に一時的に滞留して保温作用を果たし、この部分の温度勾配を図中の点線 Ｂに示すように緩和することになる。そのためにリング状突起１１設置位置はハ ニカム体３の端面８に近接させることが好ましいが、余り近付けるとハニカム体 の軸方向熱膨脹の際に衝接し破損を起したり、ガスの通過を閉塞することが起こ るため、常にガスが緩流する間隔１２を保持する。このハニカム体３とリング状 突起１１との間隔１２として１mm以上を確保することが好ましい。According to the present invention having such a configuration, when the high-temperature exhaust gas that has entered from the front connecting pipe 5a passes through the honeycomb body 3, the exhaust gas that passes through the cells on the outer peripheral side of the honeycomb body 3 is A ring-shaped projection 11 installed on the outlet side creates a gentle flow that temporarily stays in the cell to provide a heat-retaining effect and to relax the temperature gradient in this part as shown by the dotted line B in the figure. Become. Therefore, it is preferable that the position where the ring-shaped projection 11 is installed is close to the end face 8 of the honeycomb body 3. However, if it is located too close to the honeycomb body 3, it will collide with the honeycomb body during axial thermal expansion, causing damage or blocking the passage of gas. Therefore, the gap 12 is always maintained so that the gas slowly flows. It is preferable to secure a space 12 of 1 mm or more between the honeycomb body 3 and the ring-shaped projection 11.
【００１１】 図２は本考案の他の例を示すもので、外筒４の後端部を、ハニカム体３の端面 ８より間隔１２部長さまで延長して後方接続管５ｂと接続し、後方接続管５ｂの 接続部を肉厚にしてリング状突起１１としたものである。FIG. 2 shows another example of the present invention, in which the rear end portion of the outer cylinder 4 is extended from the end surface 8 of the honeycomb body 3 to a length of 12 parts and is connected to the rear connecting pipe 5b. The connecting portion of the tube 5b is made thick to form a ring-shaped projection 11.
【００１２】 図３は本考案の別の例を示すもので、外筒４の後端部を、ハニカム体３の端面 ８より延長すると共にその延長端部にリング状突起１１を間隔１２形成せしめて 設置し、後方接続管５ｂとリング状突起１１とを接続したものである。FIG. 3 shows another example of the present invention, in which the rear end of the outer cylinder 4 is extended from the end face 8 of the honeycomb body 3 and ring-shaped projections 11 are formed at intervals 12 on the extended end. The rear connecting pipe 5b and the ring-shaped projection 11 are connected to each other.
【００１３】 図４は本考案の更に別の例を示すもので、外筒４の後端部を、ハニカム体３の 端面８より延長すると共にその延長端部にリング状突起１１を間隔１２形成せし めて設置し、接続部を肉厚にした後方接続管５ｂとリング状突起１１とを接続し たものである。FIG. 4 shows still another example of the present invention, in which the rear end portion of the outer cylinder 4 is extended from the end surface 8 of the honeycomb body 3, and the ring-shaped projections 11 are formed at intervals 12 on the extended end portion. The ring-shaped projection 11 is connected to the rear connecting pipe 5b, which is installed at most and has a thick connecting portion.
【００１４】[0014]
この様に本考案は、外筒に接合しているハニカム体の外周近傍に起こる温度勾 配を、ハニカム体の後方に有効間隔を保持せしめてリング体（突起）を設け、こ の間隔部分に起こる排ガス流の緩和で少なくし、生起する熱応力を減少してメタ ル担体の長寿命化を計ることができる。また、リング体設置によるガス流の閉塞 もなく触媒効果の減少も起きない。 In this way, according to the present invention, the temperature gradient that occurs in the vicinity of the outer periphery of the honeycomb body joined to the outer cylinder is provided with a ring body (projection) at the rear side of the honeycomb body to maintain an effective gap, and the gap portion is provided at this gap portion. It is possible to reduce the exhaust gas flow that occurs and reduce the thermal stress that occurs to prolong the life of the metal carrier. Moreover, the gas flow is not blocked by the installation of the ring body and the catalytic effect is not reduced.
【図１】本考案の一例を示す断面図。FIG. 1 is a sectional view showing an example of the present invention.
【図２】本考案の他の例を示す断面図。FIG. 2 is a sectional view showing another example of the present invention.
【図３】本考案の別の例を示す断面図。FIG. 3 is a sectional view showing another example of the present invention.
【図４】本考案の更に別の例を示す断面図。FIG. 4 is a sectional view showing still another example of the present invention.
【図５】メタル担体の例を示す斜視図。FIG. 5 is a perspective view showing an example of a metal carrier.
【図６】従来の一例を示す断面図。FIG. 6 is a cross-sectional view showing a conventional example.
【図７】従来の他の例を示す断面図。FIG. 7 is a cross-sectional view showing another conventional example.
１：平箔 ２：波箔 ３：ハニカム体 ４：外筒 ５：接続管 ６：フランジ ７：ロウ材 ８：ハニカム体端面 ９：僅かな間隙 １０：支持部材 １１：リング状突起 １２：間隔 1: Flat foil 2: Corrugated foil 3: Honeycomb body 4: Outer cylinder 5: Connection pipe 6: Flange 7: Brazing material 8: Honeycomb body end surface 9: Slight gap 10: Support member 11: Ring-shaped protrusion 12: Spacing
Claims (3)
は渦巻状に巻回して成形したハニカム体を、金属製外筒
に挿入して構成するメタル担体において、ハニカム体の
排ガス出側端面より１mm以上の間隔を構成する位置に、
前記ハニカム体外周部分の平箔及び波箔の一層乃至複数
層と重複する幅を有するリング体を設けたことを特徴と
する排気ガス浄化用メタル担体。1. In a metal carrier constituted by inserting a flat foil and a corrugated foil made of a metal into layers and winding them in a laminated or spiral shape and inserting the honeycomb body into a metallic outer cylinder, the exhaust side of the honeycomb body is discharged. At a position that forms a space of 1 mm or more from the end face,
A metal carrier for exhaust gas purification, comprising a ring body having a width overlapping with one or more layers of the flat foil and the corrugated foil in the outer peripheral portion of the honeycomb body.
内周面にリング体を固定してなる請求項１記載の排気ガ
ス浄化用メタル担体。2. The exhaust gas purifying metal carrier according to claim 1, wherein the ring body is fixed to the inner peripheral surface of the outer cylinder extending from the end surface of the honeycomb body.
面にリング体を固定してなる請求項１記載の排気ガス浄
化用メタル担体。3. The exhaust gas purifying metal carrier according to claim 1, wherein a ring body is fixed to an inner peripheral surface of the connecting pipe expanding portion fixed to the outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10077591U JPH0569319U (en) | 1991-12-06 | 1991-12-06 | Exhaust gas purification metal carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10077591U JPH0569319U (en) | 1991-12-06 | 1991-12-06 | Exhaust gas purification metal carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0569319U true JPH0569319U (en) | 1993-09-21 |
Family
ID=14282858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10077591U Withdrawn JPH0569319U (en) | 1991-12-06 | 1991-12-06 | Exhaust gas purification metal carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0569319U (en) |
-
1991
- 1991-12-06 JP JP10077591U patent/JPH0569319U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19960404 |