WO1995007142A1 - Metallic carrier - Google Patents

Metallic carrier Download PDF

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Publication number
WO1995007142A1
WO1995007142A1 PCT/JP1994/001484 JP9401484W WO9507142A1 WO 1995007142 A1 WO1995007142 A1 WO 1995007142A1 JP 9401484 W JP9401484 W JP 9401484W WO 9507142 A1 WO9507142 A1 WO 9507142A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal
small
metallic
diameter hollow
carrier
Prior art date
Application number
PCT/JP1994/001484
Other languages
French (fr)
Japanese (ja)
Inventor
Masayoshi Usui
Original Assignee
Usui Kokusai Sangyo Kaisha, Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Usui Kokusai Sangyo Kaisha, Ltd. filed Critical Usui Kokusai Sangyo Kaisha, Ltd.
Priority to DE4496683T priority Critical patent/DE4496683T1/en
Priority to GB9600125A priority patent/GB2295100B/en
Publication of WO1995007142A1 publication Critical patent/WO1995007142A1/en
Priority to KR1019950705234A priority patent/KR960702342A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2817—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates only with non-corrugated sheets, plates or foils
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/34—Honeycomb supports characterised by their structural details with flow channels of polygonal cross section
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/36—Honeycomb supports characterised by their structural details with flow channels formed by tubes

Definitions

  • the present invention generally relates to a metal carrier for carrying an exhaust gas purifying catalyst, which is used in an exhaust gas purifying apparatus for an automobile.
  • the present invention provides a method for replacing the metal metal carrier with a conventional expensive heat-resistant steel plate-shaped band (foil) and / or corrugated band-shaped band (foil). Economical and durable, etc., characterized by comprising a cylindrical metal casing, a small-diameter hollow tube disposed in the metal casing, and a metal wire for fixing the tube in the metal casing.
  • Metal carrier with excellent properties
  • a catalyst carrier for this type of exhaust gas purification device a monolith type made of ceramic (ceramic monolith) using ceramic materials such as cordierite and a metal carrier made of metal Monolithic (metal monolith) is known.
  • metal monoliths have been actively researched and developed to improve the disadvantages of ceramic monoliths, that is, from the viewpoints of mechanical strength, durability, ventilation resistance, and purification efficiency (miniaturization of equipment). I have.
  • This type of conventional metal catalyst carrier (metal carrier) (MS-I, Metal Typical examples of support are shown in Figs. 10 to 11.
  • this type of metal carrier is composed of a flat strip made of a thin steel sheet having excellent high-temperature oxidation resistance and heat resistance (1) and a corrugated strip (2) formed by corrugating the thin steel sheet. Are stacked so as to have a contact portion with each other, and are wound together in a spiral shape, or are stacked and stacked in layers.
  • Many meshes for the exhaust gas passage in the axial direction are manufactured. It comprises a metal honeycomb body having a ventilation hole (cell), and a cylindrical metal case (4) having both ends opened for loading and fixing the metal honeycomb body.
  • FIG. 10 shows a wound-type metal honeycomb body (H)
  • FIG. 11 shows a laminated-type metal honeycomb body (H).
  • the metal honeycomb body and the metal case constituting the metal carrier are formed at a high temperature of the exhaust gas itself and an exothermic reaction between the exhaust gas and a purification catalyst (a catalyst such as Pt, Pd, and Rh). It is firmly fixed by brazing or welding so that it can withstand the thermal expansion and thermal stress caused by the vibration, and withstand the vibrations during driving of the car. It goes without saying that the contact portions between the flat band material and the corrugated band material constituting the metal honeycomb body are also fixed by various methods.
  • a purification catalyst a catalyst such as Pt, Pd, and Rh
  • the flat band material (1) and the corrugated band material (2) which are the components thereof are, for example, chrome steel (chromium 13 to 25%), Fe-Cr 20 Heat-resistant stainless steel such as% -A15% or stainless steel to which rare earth is added in order to improve high-temperature oxidation resistance is used.
  • stainless steel containing A 1 each strip serves to improve the high-temperature oxidation resistance, whisker to strip surface by heat treatment -
  • Various alpha-A 1 2 0 3 in the form of such like or mushroom-like This is an extremely preferable material because it precipitates and firmly adheres a wash coat for supporting the exhaust gas purifying catalyst.
  • the flat band material (1) and the corrugated band material (2) that constitute the metal honeycomb body (H) described above are made of a material itself or a foil material (thickness of 0.1 mm) for use in this kind of application.
  • it is extremely expensive, such as high rolling costs, and greatly reduces the price competitiveness of metal honeycomb bodies with respect to ceramic honeycomb bodies.
  • an expensive high-temperature brazing material such as a Ni-based material is used, so that the cost is increased in this aspect as well.
  • the two strip materials (1, 2) abut each other. Therefore, the effective surface area for supporting the exhaust gas purifying catalyst is small.
  • both strips (1, 2) abut against the flat strip (1) at the top Z valley of the wave of the corrugated strip (2), but both strips (1, 2)
  • the effective surface area is reduced to a small extent because the abutment does not make contact in a point contact state in which the supported amount of the catalyst is increased as much as possible in the abutment part, but in a face contact state.
  • the effective surface area is reduced by as much as 30% in the abutting mode of both strips (1, 2), and the material is fully utilized while using expensive strips (1, 2). It can be said that there is no.
  • a metal honeycomb body which is a main component of a metal carrier, is replaced with a plurality of thin-walled small-diameter members without using the above-mentioned flat band material (1) and corrugated band material (2).
  • Techniques for manufacturing from tubes (capillaries) have been proposed (for example, see JP-A-63-13684 and JP-A-63-273). See Nos. 5 17 and 6 3 — 3 1 5 1 5 0 and 6 3 — 3 1 5 1 5 1
  • a plurality of small-diameter hollow tubes (tubes) having an arbitrary cross-sectional shape are arranged in a cylindrical metal casing for a metal carrier using the above-mentioned expensive band material (foil material).
  • the present invention provides a metal-honeycomb body having a honeycomb structure formed on the basis of a conventional thin tube and having the outer peripheral surfaces thereof in close contact with each other.
  • the number of small tubes used can be reduced because the amount of supported catalyst is significantly increased, and the exhaust gas is stirred and turbulent in the space formed between the small tubes. It has been completed based on the knowledge that gas purification performance can be improved.o
  • a metal carrier for supporting an exhaust gas purifying catalyst which is economical and has excellent characteristics is provided.
  • the present invention provides a metal carrier for supporting an exhaust gas purifying catalyst, wherein the metal carrier comprises: ( ⁇ ) Cylindrical mail casing,
  • the present invention relates to a metal carrier characterized by comprising: BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a perspective view showing a metal carrier of the present invention, in which a part is seen through and a part is omitted.
  • FIG. 2 is a view for explaining the structure of the small-diameter hollow tube of the first embodiment applied to the metal carrier of the present invention.
  • FIG. 3 is a diagram illustrating the structure of a small-diameter hollow tube according to a second embodiment applied to the metal carrier of the present invention.
  • FIG. 4 is a side view in which a part of FIG. 3 is seen through.
  • FIG. 5 is a diagram illustrating the structure of a small-diameter hollow tube according to a third embodiment applied to the metal carrier of the present invention.
  • FIG. 6 is a diagram illustrating the structure of a small-diameter hollow tube according to a fourth embodiment applied to the metal carrier of the present invention.
  • FIG. 7 is a diagram illustrating the structure of a small-diameter hollow tube according to a fifth embodiment applied to the metal carrier of the present invention.
  • FIG. 8 is a diagram illustrating the structure of a small-diameter hollow tube according to a sixth embodiment applied to the metal carrier of the present invention.
  • FIG. 9 is a view for explaining the structure of a small-diameter hollow tube of a seventh embodiment applied to the metal carrier of the present invention.
  • FIG. 10 is a perspective view of a conventional wound-type metal honeycomb body.
  • FIG. 11 is a perspective view of a conventional laminated metal honeycomb body.
  • FIG. 1 is a perspective view in which a part of the metal carrier (MS) of the present invention is seen through and a part is omitted.
  • the metal carrier (MS) of the present invention comprises a heat-resistant steel metal casing (C), a heat-resistant steel small-diameter hollow tube disposed in the metal casing (C). (T) and the hollow tube (t) It is composed of three components, a metal wire (W) for disposing and fixing it in a metal casing (C).
  • the metal casing (C) constituting the metal carrier (MS) of the present invention contains the small-diameter hollow tube (t) therein, and has the small-diameter hollow tube (t) enclosed by the metal wire (W).
  • Any structure suitable for fixing the hollow tube (t) may be used, and there is no particular limitation.
  • the method of fixing the small-diameter hollow tube (t) in the metal casing (C) may be any method.
  • FIG. 1 shows an embodiment in which a metal wire (W) is stretched in a cross shape at both end portions of a metal casing (C), and a small-diameter hollow tube (t) is held between the metal wires (W). Things are shown. Although not shown in the figure, holes are formed at predetermined pitches in the axial direction from both end surfaces of the metal casing (C) in the circumferential direction of the outer peripheral wall thereof. W) may be stretched, and the small-diameter hollow tube (t) may be held and fixed between the wires.
  • the material of the metal casing (C) is the same heat-resistant material as that used in the production of the conventional metal honeycomb body shown in FIGS. 10 to 11. Steel may be used, or a material having high heat and corrosion resistance may be used.
  • the outer part has a double structure in which the metal material is more resistant to heat and corrosion than the inner part.
  • the stainless steel is used for the inner part and the austenitic stainless steel for the outer part. You may use what you have.
  • the metal wire (W) constituting the metal carrier (MS) of the present invention is formed by forming a thin hollow tube (t) into a metal casing (T) as shown in the figure. C)
  • a flat band material (foil material) or a corrugated sheet material (foil material) used in the production of the conventional metal honeycomb body shown in FIGS. 10 to 11 is used as the material of the metal wire (W).
  • a material having the same characteristics as the material that is, a material having excellent high-temperature oxidation resistance.
  • a wire material such as Fe—20Cr—5A1 or REM added thereto is used.
  • the cross-sectional shape of the metal wire (W) is generally circular, but may be an elliptical shape, polygonal shape, rectangular shape, or other different shapes, or may be twisted or combined.
  • the wire diameter and thickness of the metal wire (W) may be predetermined.
  • a wire having a wire diameter of 0.1 to 1.0 dragon is generally used.
  • a flat ribbon material can be used as the metal wire (W).
  • the metal wire (W) is a flat ribbon material, it is preferable because the fixing of the small-diameter hollow tube in the metal casing (C) becomes strong.
  • a material having a thickness of 100 jum and a width of 5 dragons is used as this type of ribbon material.
  • FIG. 2 shows the structure of the small-diameter hollow tube according to the first embodiment applied to the metal support (MS) of the present invention shown in FIG.
  • the small-diameter hollow tube (ti) of the first embodiment is a cylindrical small-diameter hollow tube having a desired diameter as illustrated. 2 shows, the small-diameter hollow tube) is, two of Metaruwai yer has been shown to be fixed by the fixing unit (fi) by W 9).
  • the fixing means any means such as welding or brazing, and furthermore, diffusion bonding by heat diffusion treatment is adopted. Further, a locking means for mechanically locking between metal wires as described later may be used.
  • metal wires are omitted to simplify the drawing.
  • the metal wires may be stretched only in the vertical direction, or may be stretched vertically and horizontally or in a cross shape.
  • the number of the small-diameter hollow tubes) to be used may be appropriately determined from the viewpoint of the purifying performance (set purifying degree) targeted for exhaust gas.
  • the purifying performance set purifying degree
  • the following setting value of the used number is helpful.
  • a cylindrical wound metal honeycomb body (a foil thickness of 50 ⁇ m, a cell density of 0.65 mm and a length of 75 mm) manufactured using a band material (foil material)
  • the metal carrier of the present invention needs to have a supported surface area for an equivalent exhaust gas purifying catalyst.
  • FIGS. 3 and 4 are diagrams illustrating a small-diameter hollow tube (t 2 ) according to a second embodiment applied to the metal carrier (MS) of the present invention.
  • the small-diameter hollow tube (t 2 ) of the second embodiment is a cylindrical tube having a concave portion (f n ) at a desired portion as a fixing portion with a metal wire (W).
  • the small-diameter hollow tube (t 2 ) is locked by two ribbon-like wires (w 3 , w 4 :) in the concave portion (f 2 ).
  • Oite in the recess (f.) Just two of the ribbon-like wire (w 3, W ⁇ ,) by not only engaging fixed, in yet a recess (f 2) Welding
  • a fixing means such as brazing may be applied.
  • FIG. 5 is a diagram illustrating a small-diameter hollow tube (t 3 ) according to a third embodiment applied to the metal carrier (MS) of the present invention.
  • the microscopic hollow tube (t 3 ) of the third embodiment is a cylindrical tube having a notch (f 3 ) on the side of the tube as a fixing portion with a metal wire (W) at a desired portion. is there.
  • FIG. 6 is a diagram illustrating a small-diameter hollow tube (t 4 ) according to a fourth embodiment applied to the metal carrier (MS) of the present invention.
  • the small-diameter hollow tube (t 4 ) of the fourth embodiment is a tube having a cylindrical, uneven bellows-shaped peripheral wall portion, and the fixed portion (f 4 ) made of a metal wire (W) is provided with the uneven bellows portion.
  • the outer peripheral wall has an uneven bellows shape, the surface area is larger than that of the cylindrical shape, so that the catalyst carrying amount can be increased.
  • FIG. 7 is a view for explaining a small-diameter hollow tube (t 5 ) of a fifth embodiment applied to the metal carrier (MS) of the present invention.
  • the small-diameter hollow tube (t 5 ) of the fifth embodiment is a cylindrical tube, and has a notch formed at every 1Z4 circumference on the wall of both end surfaces of the tube as a fixing portion by a metal wire (W).
  • W metal wire
  • a shall which have a (f 5).
  • the small-diameter hollow tube (t) applied to the metal carrier (MS) of the present invention is not limited to the above-described circular cross-sectional shape, but may have a desired shape.
  • FIG. 8 shows a small-diameter hollow tube (t 6 ) according to a sixth embodiment of the present invention, the cross-sectional shape of which is a rhombus.
  • FIG. 9 shows a small-diameter hollow tube (t 7 ) according to a seventh embodiment of the present invention, whose cross-sectional shape is hexagonal.
  • the cross section may be elliptical.
  • a metal carrier (MS) having a smaller diameter than the other portion may be provided at the center of the metal carrier (MS), or a combination of several types of tubes may be used.
  • the arrangement density of these tubes is determined as appropriate. For example, if a small-diameter tube is placed at the center of a metal carrier (MS), a desired amount of catalyst suitable for the high-speed exhaust gas flow at the center can be supported, achieving uniform purification performance. You can do it.
  • MS metal carrier
  • the small-diameter hollow tube may be disposed between metal wires stretched only in the vertical direction or the horizontal direction.
  • the small-diameter hollow tubes (t) may be brought into contact with each other vertically or horizontally, or a desired gap may be provided. You may do so.
  • the metal carrier (MS) for supporting the exhaust gas purifying catalyst of the present invention has various types of honeycomb structures composed of a conventional flat strip (foil) and corrugated strip (foil). Compared to a metal carrier whose main component is a metal honeycomb body or a honeycomb-structured metal carrier in which a small-diameter tube is packed in a close-packed state in a metal casing, the following advantages are obtained. It has the effect.
  • the metal carrier (MS) of the present invention has a structure in which a small-diameter hollow tube is arranged and fixed in a metal casing with a metal wire, the large size generated inside the metal carrier when the metal carrier is used. Since the deforming force based on the thermal stress can be absorbed and reduced by the small-diameter hollow metal tube and the metal wire, the durability is excellent.
  • Tal carrier with low ability to absorb and alleviate the deformation force
  • the metal carrier (MS) of the present invention is an array of small-diameter hollow tubes via metal wires
  • the exhaust gas flow is stirred and mixed between each small-diameter hollow tube and the small-diameter hollow tube. Since turbulence can be obtained, the contact efficiency between the exhaust gas and the exhaust gas purification catalyst carried on the surface of the small-diameter hollow tube is improved, and the purification performance can be improved.
  • a conventional band material is used.
  • a honeycomb structure in which a small-diameter tube is closely packed in a metal casing is also used. In particular, special mechanisms are needed for turbulence.
  • each small-diameter hollow tube can be arranged and fixed in a metal casing through a metal wire with a desired gap portion, The outer surface of each tube can be used effectively for supporting the catalyst (the specific surface area per unit weight is large).
  • the conventional band material (foil material) is extremely expensive, but the metal carrier composed of an array of small-diameter hollow tubes according to the present invention is inexpensive and has a cost advantage. Can be done.
  • the metal carrier of the present invention is a metal carrier mainly composed of a metal honeycomb body having a honeycomb structure using a conventional flat band material and a corrugated band material (foil material), or a thin-diameter tube formed of a metal casing. Compared to a metal carrier with a honeycomb structure that is closest-packed inside, it is superior in thermal stress absorption, relaxation characteristics, exhaust gas purification performance, economic efficiency, etc.
  • the metal carrier of the present invention is suitably used for an exhaust gas purification device.
  • a metal carrier for supporting a catalyst for purifying exhaust gas wherein the metal carrier is
  • the locking portion is a concave portion, a cutout portion, and an uneven portion formed on the tube side portion.
  • metal carrier according to claim 1 wherein the metal wire is a wire having an arbitrary cross-sectional shape.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

The invention provides a metallic carrier having a good economical efficiency and various good properties such as durability, capability of exhaust gas purification and the like as compared with conventional, expensive metallic carriers having as a main constituent element a metallic honeycomb body which uses a band material (foil material) in the form of a flat plate and/or a corrugated plate or metallic carriers of a honeycomb construction which comprise small diameter tubes closely-packed in a metallic casing. More specifically, in the invention, the metallic carrier for carrying an exhaust gas purifying catalyst comprises: (i) a cylindrical-shaped metallic casing, (ii) a desired number of small diameter hollow tubes having a cross section of an arbitrary shape and provided in said metallic casing, and (iii) a metallic wire for arranging and securing said small diameter hollow tubes in said metallic casing.

Description

明 ism  Akira ism
fm 発明の名称  fm Title of invention
メ夕ル担体 技術分野  Mail carrier Technical field
本発明は、 一般に、 自動車の排気ガス浄化装置において使用され る、 排気ガス浄化用触媒を担持させるための金属製のメタル担体に 関する。  TECHNICAL FIELD The present invention generally relates to a metal carrier for carrying an exhaust gas purifying catalyst, which is used in an exhaust gas purifying apparatus for an automobile.
更に詳しくは、 本発明は、 金属製のメタル担体の構成部材を、 従 来の高価な耐熱鋼製の平板状帯材 （箔材） 及びまたは波板状帯材 （ 箔材） に代えて、 筒状メタルケ一シングと該メタルケ一シング内に 配設する細径中空チューブ、 及び該チューブをメタルケ一シング内 に固定するためのメタルワイヤーで構成したことを特徴とする経済 的でかつ耐久性などの特性に優れたメタル担体に関するものである  More specifically, the present invention provides a method for replacing the metal metal carrier with a conventional expensive heat-resistant steel plate-shaped band (foil) and / or corrugated band-shaped band (foil). Economical and durable, etc., characterized by comprising a cylindrical metal casing, a small-diameter hollow tube disposed in the metal casing, and a metal wire for fixing the tube in the metal casing. Metal carrier with excellent properties
背景技術 Background art
従来、 この種の排気ガス浄化装置用の触媒担体として、 コージュ ライ トなどのセラミ ック材を用いたセラミ ック製のモノ リスタイプ (セラミ ックモノ リス） のものと、 金属 （メタル） 製のモノ リスタ イブ （メタルモノ リス） のものが知られている。  Conventionally, as a catalyst carrier for this type of exhaust gas purification device, a monolith type made of ceramic (ceramic monolith) using ceramic materials such as cordierite and a metal carrier made of metal Monolithic (metal monolith) is known.
特に最近においては、 セラミ ックモノ リスの欠点を改善するため に、 即ち、 機械的強度、 耐久性、 通気抵抗、 浄化効率 （装置の小型 化） などの観点からメタルモノ リスが盛んに研究開発されている。  Particularly recently, metal monoliths have been actively researched and developed to improve the disadvantages of ceramic monoliths, that is, from the viewpoints of mechanical strength, durability, ventilation resistance, and purification efficiency (miniaturization of equipment). I have.
この種の従来の金属製触媒担体 （メタル担体） （M S一、 メタル サポート） の典型例は、 図 10〜図 1 1に示されるものである。 そ して、 この種のメタル担体は一般に耐高温酸化性や耐熱性に優れた 薄肉鋼板からの平板状帯材 （1) と前記薄肉鋼板を波付形成した波 板状帯材 （2) とを、 相互に当接部を有するように重積し、 これを 一括渦巻状に巻回積層するか、 あるいは階層状に重積して製作した 軸方向に排気ガス通路のための多数の網目状通気穴路 （セル） を有 するメタルハニカム体と、 前記メタルハニカム体を填装し固着する ための両端が開口した筒状の金属製ケース （4) から構成されるも のである。 This type of conventional metal catalyst carrier (metal carrier) (MS-I, Metal Typical examples of support are shown in Figs. 10 to 11. Generally, this type of metal carrier is composed of a flat strip made of a thin steel sheet having excellent high-temperature oxidation resistance and heat resistance (1) and a corrugated strip (2) formed by corrugating the thin steel sheet. Are stacked so as to have a contact portion with each other, and are wound together in a spiral shape, or are stacked and stacked in layers.Many meshes for the exhaust gas passage in the axial direction are manufactured. It comprises a metal honeycomb body having a ventilation hole (cell), and a cylindrical metal case (4) having both ends opened for loading and fixing the metal honeycomb body.
なお、 図 10は巻回タイプのメタルハニカム体 （H) を示し、 図 11は積層タイプのメタルハニカム体 （H) を示すものである。 そして、 前記メタル担体を構成するメタルハニカム体と金属製ケ ースとは、 排気ガス自体の高温度及び排気ガスと浄化用触媒 （P t , P d, Rhなどの触媒） との発熱反応などによる熱膨張や熱的応 力に耐え得るように、 また自動車走行時の振動などに耐え得るよう にろう接または溶接などにより強固に固着される。 なお、 メタルハ 二カム体を構成する平板状帯材と波板状帯材の当接部も種々の方法 により固着されることはいうまでもないことである。  FIG. 10 shows a wound-type metal honeycomb body (H), and FIG. 11 shows a laminated-type metal honeycomb body (H). The metal honeycomb body and the metal case constituting the metal carrier are formed at a high temperature of the exhaust gas itself and an exothermic reaction between the exhaust gas and a purification catalyst (a catalyst such as Pt, Pd, and Rh). It is firmly fixed by brazing or welding so that it can withstand the thermal expansion and thermal stress caused by the vibration, and withstand the vibrations during driving of the car. It goes without saying that the contact portions between the flat band material and the corrugated band material constituting the metal honeycomb body are also fixed by various methods.
前記した従来のメタルハニカム体において、 その構成部材である 平板状帯材 （1) と波板状帯材 （2) としては、 例えばクロム鋼 （ クロム 13〜 25%) 、 F e -C r 20%-A 1 5%などの耐熱性 のステンレス鋼あるいはこれに耐高温酸化性を改善するために希土 類を加えたステンレス鋼などの厚さが 0. 1mm以下の帯材 （箔材） が使用される。 なお、 各帯材に A 1を含有したステンレス鋼は、 耐 高温酸化性が向上するとともに、 熱処理により帯材表面にウイスカ —状ないしマッシュルーム状などの種々の形状の α— A 12 03 が 析出し、 これが排気ガス浄化用触媒を担持するためのゥォッシュコ 一トを強固に固着するため極めて好ましい材料である。 In the above-mentioned conventional metal honeycomb body, the flat band material (1) and the corrugated band material (2) which are the components thereof are, for example, chrome steel (chromium 13 to 25%), Fe-Cr 20 Heat-resistant stainless steel such as% -A15% or stainless steel to which rare earth is added in order to improve high-temperature oxidation resistance is used. used. Incidentally, stainless steel containing A 1 each strip serves to improve the high-temperature oxidation resistance, whisker to strip surface by heat treatment - Various alpha-A 1 2 0 3 in the form of such like or mushroom-like This is an extremely preferable material because it precipitates and firmly adheres a wash coat for supporting the exhaust gas purifying catalyst.
しかしながら、 前記したメタルハニカム体 （H) を構成する平板 状帯材 （1) 及び波板状帯材 （2) は、 材料自体あるいはこの種の 用途に適用するための箔材 （厚さ 0. 04〜0. 1随） とするのに 圧延コストがかかるなど極めて高価なものであり、 セラミ ック製の ハニカム体に対するメタルハニカム体の価格競争力を大きく低下さ せている。 また、 前記したようにメタルハニカム体の製造において 、 各構成部材をろう接合する場合、 N i系などの高価な高温ろう材 を使用するため、 この面でもコストがかさむものである。  However, the flat band material (1) and the corrugated band material (2) that constitute the metal honeycomb body (H) described above are made of a material itself or a foil material (thickness of 0.1 mm) for use in this kind of application. However, it is extremely expensive, such as high rolling costs, and greatly reduces the price competitiveness of metal honeycomb bodies with respect to ceramic honeycomb bodies. Further, as described above, in the case of brazing the respective constituent members in the manufacture of the metal honeycomb body, an expensive high-temperature brazing material such as a Ni-based material is used, so that the cost is increased in this aspect as well.
更には、 前記した高価な平板状帯材 （1) と波板状帯材 （2) を 使用して製造したハニカム構造のメタルハニカム体は、 両帯材 （1 、 2) が相互に当接している関係上、 排気ガス浄化用触媒を担持さ せるための有効表面積は小さいものである。  Furthermore, in the metal honeycomb body having a honeycomb structure manufactured by using the above-mentioned expensive flat strip material (1) and corrugated strip material (2), the two strip materials (1, 2) abut each other. Therefore, the effective surface area for supporting the exhaust gas purifying catalyst is small.
即ち、 両帯材 （1、 2) は、 波板状帯材 （2) の波の頂部 Z谷部 において平板状帯材 （1) と相互に当接するが、 両帯材 （1、 2) は前記当接部において触媒の担持量をできるだけ多くするような点 接触の状態で当接しているのではなく、 面接触の状態で当接してい るため、 前記有効表面積は小さく減ぜられる。 両帯材 （1、 2) の 当接態様において、 場合によっては 30%も有効表面積が減じられ てしまい、 高価な帯材 （1、 2) を使用していながら、 十分に材料 を活用していないということができる。  That is, both strips (1, 2) abut against the flat strip (1) at the top Z valley of the wave of the corrugated strip (2), but both strips (1, 2) The effective surface area is reduced to a small extent because the abutment does not make contact in a point contact state in which the supported amount of the catalyst is increased as much as possible in the abutment part, but in a face contact state. In some cases, the effective surface area is reduced by as much as 30% in the abutting mode of both strips (1, 2), and the material is fully utilized while using expensive strips (1, 2). It can be said that there is no.
また、 当業界において、 前記した平板状帯材 （1) と波板状帯材 (2) を使用せずに、 メタル担体の主要な構成要素であるメタルハ 二カム体を、 複数本の薄肉小径管 （細管） から製造する技術が提案 されている （例えば、 特開昭 63— 13684号、 同 63— 273 5 1 7号、 同 6 3 — 3 1 5 1 5 0号、 同 6 3 — 3 1 5 1 5 1号参照In addition, in the art, a metal honeycomb body, which is a main component of a metal carrier, is replaced with a plurality of thin-walled small-diameter members without using the above-mentioned flat band material (1) and corrugated band material (2). Techniques for manufacturing from tubes (capillaries) have been proposed (for example, see JP-A-63-13684 and JP-A-63-273). See Nos. 5 17 and 6 3 — 3 1 5 1 5 0 and 6 3 — 3 1 5 1 5 1
) o ) o
しかしながら、 これらのものは小径管同士をその外周面を相互に 緊密に接触させるようにしてメタルハニカム体とするため、 前記し たように排気ガスの浄化用触媒を担持する有効表面積が著しく減ぜ られるものである。 発明の開示  However, since the small-diameter tubes are made into a metal honeycomb body with their outer peripheral surfaces in close contact with each other, the effective surface area for supporting the exhaust gas purifying catalyst is significantly reduced as described above. It is something that can be done. Disclosure of the invention
本発明は、 前記した高価な帯材 （箔材） を使用したメタル担体に 対して、 筒状メタルケ一シング内に、 複数本の任意断面形状の細径 中空チューブ （管体） を配設するとともに、 該中空チューブを相互 に所望の間隔をもってメタルワイヤーで固定したとき、 コストメ リ ッ 卜が得られるとともに耐久性などに優れた特性を有するメタル担 体が得られるという知見をベースにして完成されたものである。  According to the present invention, a plurality of small-diameter hollow tubes (tubes) having an arbitrary cross-sectional shape are arranged in a cylindrical metal casing for a metal carrier using the above-mentioned expensive band material (foil material). At the same time, it has been completed based on the knowledge that when the hollow tubes are fixed to each other with a metal wire at a desired interval, a cost advantage can be obtained and a metal carrier having excellent properties such as durability can be obtained. It is a thing.
また、 本発明は、 従来の細管をベースとし、 相互にその周外面を 密接させて形成したハニカム構造のメタルハニカム体に対して、 メ タルケーシング内に細管を相互にその外周面を密接させないで配設 した場合、 触媒担持量が著しく増大するために使用する細管を減じ ることが出来ること、 また、 各細管の間に形成される空間スペース において排気ガスが攪拌、 乱流化するために排気ガスの浄化能を向 上させることが出来るという知見をベースにして完成されたもので め o  In addition, the present invention provides a metal-honeycomb body having a honeycomb structure formed on the basis of a conventional thin tube and having the outer peripheral surfaces thereof in close contact with each other. In this case, the number of small tubes used can be reduced because the amount of supported catalyst is significantly increased, and the exhaust gas is stirred and turbulent in the space formed between the small tubes. It has been completed based on the knowledge that gas purification performance can be improved.o
本発明により、 経済的でかつ諸特性に優れた排気ガス浄化用触媒 を担持するためのメタル担体が提供される。  According to the present invention, a metal carrier for supporting an exhaust gas purifying catalyst which is economical and has excellent characteristics is provided.
本発明を概説すれば、 本発明は、 排気ガスの浄化用触媒を担持す るためのメタル担体において、 前記メタル担体が、 (ί) 筒状のメ夕ルケ一シング、 In general, the present invention provides a metal carrier for supporting an exhaust gas purifying catalyst, wherein the metal carrier comprises: (ί) Cylindrical mail casing,
(i i) 前記メタル々一シング内に配設される所望本数の任意断面 形状の細径中空チューブ、  (ii) a desired number of small-diameter hollow tubes of any cross-sectional shape disposed in the metal singles;
(i i i) 前記メタルケ一シング内に前記細径中空チューブを配列し 、 固定するためのメタルワイヤー、  (iii) a metal wire for arranging and fixing the small-diameter hollow tubes in the metal casing,
から構成されることを特徵とするメタル担体に関するものである。 図面の簡単な説明 The present invention relates to a metal carrier characterized by comprising: BRIEF DESCRIPTION OF THE FIGURES
図 1は、 本発明のメタル担体を示す一部を透視し、 かつ一部を省 略した斜視図である。  FIG. 1 is a perspective view showing a metal carrier of the present invention, in which a part is seen through and a part is omitted.
図 2は、 本発明のメタル担体に適用される第一実施態様の細径中 空チューブの構造を説明する図である。  FIG. 2 is a view for explaining the structure of the small-diameter hollow tube of the first embodiment applied to the metal carrier of the present invention.
図 3は、 本発明のメタル担体に適用される第二実施態様の細径中 空チューブの構造を説明する図である。  FIG. 3 is a diagram illustrating the structure of a small-diameter hollow tube according to a second embodiment applied to the metal carrier of the present invention.
図 4は、 図 3の一部を透視した側面図である。  FIG. 4 is a side view in which a part of FIG. 3 is seen through.
図 5は、 本発明のメタル担体に適用される第三実施態様の細径中 空チューブの構造を説明する図である。  FIG. 5 is a diagram illustrating the structure of a small-diameter hollow tube according to a third embodiment applied to the metal carrier of the present invention.
図 6は、 本発明のメタル担体に適用される第四実施態様の細径中 空チューブの構造を説明する図である。  FIG. 6 is a diagram illustrating the structure of a small-diameter hollow tube according to a fourth embodiment applied to the metal carrier of the present invention.
図 7は、 本発明のメタル担体に適用される第五実施態様の細径中 空チューブの構造を説明する図である。  FIG. 7 is a diagram illustrating the structure of a small-diameter hollow tube according to a fifth embodiment applied to the metal carrier of the present invention.
図 8は、 本発明のメタル担体に適用される第六実施態様の細径中 空チューブの構造を説明する図である。  FIG. 8 is a diagram illustrating the structure of a small-diameter hollow tube according to a sixth embodiment applied to the metal carrier of the present invention.
図 9は、 本発明のメタル担体に適用される第七実施態様の細径中 空チューブの構造を説明する図である。  FIG. 9 is a view for explaining the structure of a small-diameter hollow tube of a seventh embodiment applied to the metal carrier of the present invention.
図 1 0は、 従来の巻回タイプのメタルハニカム体の斜視図である 図 11は、 従来の積層タイプのメタルハニカム体の斜視図である なお、 前記各図において、 図中の符号の意味は、 次の通りである FIG. 10 is a perspective view of a conventional wound-type metal honeycomb body. FIG. 11 is a perspective view of a conventional laminated metal honeycomb body. In each of the drawings, the meanings of the reference numerals in the drawings are as follows.
M S メタル担体。 MS metal carrier.
C メ夕ルケ一シング。  C mail evening singing.
t， 1 t。 ， t 3 細径中空チューブ。  t, 1 t. , T 3 Small hollow tube.
w, w1 W0 ， w3 メタルワイヤー。 f 1 · f ， f 3 ………固定部。 w, w 1 W 0 , w 3 metal wire. f 1 · f , f 3 ... fixed part.
MS' 従来のメタル担体。  MS 'Conventional metal carrier.
H 従来のメタルハニカム体 c H Conventional metal honeycomb body c
平板状帯材。  Flat strip.
2 波板状帯材。  2 Corrugated strip.
3 網目状通気孔路 （セル） C 発明を実施するための最良の形態  3 Reticulated vent channel (cell) C Best mode for carrying out the invention
以下、 本発明の技術的構成及び実施態様について、 図面を参照し て説明する。  Hereinafter, the technical configuration and embodiments of the present invention will be described with reference to the drawings.
なお、 本発明は図示のものに限定されないことはいうまでもない 乙、、ある ο  It is needless to say that the present invention is not limited to the illustrated one.
図 1は、 本発明のメタル担体 （MS) の一部を透視し、 かつ一部 を省略した斜視図である。  FIG. 1 is a perspective view in which a part of the metal carrier (MS) of the present invention is seen through and a part is omitted.
図示されるように、 本発明のメタル担体 （MS) は、 耐熱鋼製の メタルケ一シング （C) 、 該メ夕ルケ一シング （C) 内に配設され る耐熱鋼製の細径中空チューブ （t) 、 及び該中空チューブ （t) をメタルケ一シング （C) 内に配設、 固定するためのメタルワイヤ 一 （W) という三つの構成要素からなるものである。 As shown in the figure, the metal carrier (MS) of the present invention comprises a heat-resistant steel metal casing (C), a heat-resistant steel small-diameter hollow tube disposed in the metal casing (C). (T) and the hollow tube (t) It is composed of three components, a metal wire (W) for disposing and fixing it in a metal casing (C).
本発明のメタル担体 （MS) を構成するメタルケ一シング （C) は、 図示されるように、 前記細径中空チューブ （t) を内部に収容 し、 かつ前記メタルワイヤー （W) で前記細径中空チューブ （t) を固定するのに適した構造のものであればよく、 特段に制約を受け るものではない。  As shown, the metal casing (C) constituting the metal carrier (MS) of the present invention contains the small-diameter hollow tube (t) therein, and has the small-diameter hollow tube (t) enclosed by the metal wire (W). Any structure suitable for fixing the hollow tube (t) may be used, and there is no particular limitation.
メタルケ一シング （C) 内で細径中空チューブ （t) を固定する 方式は、 任意の方式のものであってよい。  The method of fixing the small-diameter hollow tube (t) in the metal casing (C) may be any method.
図 1には、 メタルケ一シング （C) の両端面部においてメタルヮ ィヤー （W) をクロス状に張設し、 該メタルワイヤ一 （W) の間で 細径中空チューブ （t) を保持する態様のものが示されている。 図 示しないが、 メタルケ一シング （C) の両端面から軸方向に所定の 長さをおいた部位において、 その外周壁の周方向に所定ピッチの穴 を穿設し、 これにメタルワイヤ一 （W) を張設し、 このワイヤー間 で細径中空チューブ （t) を保持、 固定してもよい。  FIG. 1 shows an embodiment in which a metal wire (W) is stretched in a cross shape at both end portions of a metal casing (C), and a small-diameter hollow tube (t) is held between the metal wires (W). Things are shown. Although not shown in the figure, holes are formed at predetermined pitches in the axial direction from both end surfaces of the metal casing (C) in the circumferential direction of the outer peripheral wall thereof. W) may be stretched, and the small-diameter hollow tube (t) may be held and fixed between the wires.
本発明のメタル担体 （MS) において、 前記メ夕ルケ一シング （ C) の素材としては、 図 10〜図 1 1で示される従来のメタルハニ カム体の製造に使用されているものと同種の耐熱鋼を用いてもよい し、 更に耐熱耐食性に富むものを用いてもよい。  In the metal carrier (MS) of the present invention, the material of the metal casing (C) is the same heat-resistant material as that used in the production of the conventional metal honeycomb body shown in FIGS. 10 to 11. Steel may be used, or a material having high heat and corrosion resistance may be used.
また、 外側部分の金属材料を内側部分より耐熱耐蝕性に富むもの とした二重構造のもの、 具体的には内側部分にフユライ ト系ステン レス鋼を、 外側部分にオーステナイ ト系ステンレス鋼を使用したも のを用いてもよい。  In addition, the outer part has a double structure in which the metal material is more resistant to heat and corrosion than the inner part.Specifically, the stainless steel is used for the inner part and the austenitic stainless steel for the outer part. You may use what you have.
本発明のメタル担体 （MS) を構成するメタルワイヤ一 （W) は 、 図示されるように細径中空チューブ （t) をメタルケ一シング （ C ) 内に配設するのに適したものであれば特段に制約を受けない。 前記メタルワイヤー （W) の素材としては、 図 1 0〜図 1 1で示 される従来のメタルハニカム体の製造に使用されている平板状帯材 (箔材） または波板状帯材 （箔材） と同等の特性を有するもの、 即 ち耐高温酸化性に優れた材質のものが好ましい。 例えば、 F e— 2 0 C r— 5 A 1製、 またはこれに R E Mを添加したものなどのワイ ヤー材が使用される。 The metal wire (W) constituting the metal carrier (MS) of the present invention is formed by forming a thin hollow tube (t) into a metal casing (T) as shown in the figure. C) There is no particular restriction as long as it is suitable to be installed inside. As the material of the metal wire (W), a flat band material (foil material) or a corrugated sheet material (foil material) used in the production of the conventional metal honeycomb body shown in FIGS. 10 to 11 is used. It is preferable to use a material having the same characteristics as the material), that is, a material having excellent high-temperature oxidation resistance. For example, a wire material such as Fe—20Cr—5A1 or REM added thereto is used.
メタルワイヤー （W) の断面形状は、 一般に円形であるが、 楕円 形、 多角形、 長方形などの異形状のものでも良く、 あるいはこれら を撚り合わせたり、 または組み合わせてもよい。  The cross-sectional shape of the metal wire (W) is generally circular, but may be an elliptical shape, polygonal shape, rectangular shape, or other different shapes, or may be twisted or combined.
前記メタルワイヤー （W) の線径、 厚みは所定のものでよく、 例 えば断面円形の線材の場合、 一般に線径として 0 . 1〜 1 . 0龍の ものが使用される。  The wire diameter and thickness of the metal wire (W) may be predetermined. For example, in the case of a wire having a circular cross section, a wire having a wire diameter of 0.1 to 1.0 dragon is generally used.
また、 本発明において、 前記メタルワイヤ一 （W) として扁平状 のリボン材を使用することが出来る。 メタルワイヤ一 （W) が扁平 状のリボン材であるとき、 メタルケ一シング （C ) 内での細径中空 チューブの固定が強固になるため好ましいものである。 この種のリ ボン材としては、 例えば厚さ 1 0 0 ju m 、 幅 5龍などのものが使用 される。  Further, in the present invention, a flat ribbon material can be used as the metal wire (W). When the metal wire (W) is a flat ribbon material, it is preferable because the fixing of the small-diameter hollow tube in the metal casing (C) becomes strong. For example, a material having a thickness of 100 jum and a width of 5 dragons is used as this type of ribbon material.
次に、 本発明のメタル担体 （M S ) を構成する任意断面形状の細 径中空チューブ （ t ) の構造について説明する。 Next, the structure of the small-diameter hollow tube ( t ) having an arbitrary cross-sectional shape that constitutes the metal carrier (MS) of the present invention will be described.
図 2は、 図 1に示される本発明のメタル担体 （M S ) に適用され る第一実施態様の細径中空チューブ ) の構造を示すものであ o  FIG. 2 shows the structure of the small-diameter hollow tube according to the first embodiment applied to the metal support (MS) of the present invention shown in FIG.
第一実施態様の細径中空チューブ （ t i ) は、 図示されるように 所望径の円筒状細径中空チューブである。 図 2には、 前記細径中空チューブ ) が、 二本のメタルワイ ヤー , W 9 ) により固定部 （ f i ) で固定されていることが 示されている。 前記固定手段としては、 溶接あるいはろう接、 さら には熱拡散処理による拡散接合など任意のものが採用される。 また 、 後述するようにメタルワイヤー間で機械的に係止させるような係 止手段であってもよい。 The small-diameter hollow tube (ti) of the first embodiment is a cylindrical small-diameter hollow tube having a desired diameter as illustrated. 2 shows, the small-diameter hollow tube) is, two of Metaruwai yer has been shown to be fixed by the fixing unit (fi) by W 9). As the fixing means, any means such as welding or brazing, and furthermore, diffusion bonding by heat diffusion treatment is adopted. Further, a locking means for mechanically locking between metal wires as described later may be used.
図 2において、 図を簡略化するために横方向のメタルワイヤーが 省略されている。 本発明において、 メタルワイヤーを縦方向にのみ 張設するようにしても、 あるいは縦横、 クロス状に張設するように してもよいことはいうまでもないことである。  In FIG. 2, horizontal metal wires are omitted to simplify the drawing. In the present invention, it goes without saying that the metal wires may be stretched only in the vertical direction, or may be stretched vertically and horizontally or in a cross shape.
前記細径中空チューブ ) の使用本数は、 排気ガスの目標と する浄化能 （設定された浄化度） などの観点から適宜、 決めればよ い。 例えば、 図 1 0〜図 1 1に示される従来の平板状帯材と波板状 帯材とで構成される巻回または積層タイプのメタルハニカム体と同 程度の排気ガス浄化能を達成するためには、 次の使用本数の設定値 が参考になる。  The number of the small-diameter hollow tubes) to be used may be appropriately determined from the viewpoint of the purifying performance (set purifying degree) targeted for exhaust gas. For example, in order to achieve the same level of exhaust gas purification performance as a wound or laminated metal honeycomb body composed of the conventional flat and corrugated strips shown in FIGS. 10 to 11. For reference, the following setting value of the used number is helpful.
例えば、 0 6 0 . 5 mm、 長さ 7 5 mmの帯材 （箔材） を使用して製 作した円筒状の巻回タイプのメタルハニカム体 （箔の厚さ 5 0〃m 、 セル密度 2 0 0 c p s i ) と同等の浄化能を達成するためには、 本発 明のメタル担体は、 同等の排気ガス浄化用触媒に対する担持表面積 をもつことが必要である。  For example, a cylindrical wound metal honeycomb body (a foil thickness of 50〃m, a cell density of 0.65 mm and a length of 75 mm) manufactured using a band material (foil material) In order to achieve a purifying ability equivalent to 200 cpsi), the metal carrier of the present invention needs to have a supported surface area for an equivalent exhaust gas purifying catalyst.
この場合、 円筒状細怪中空チューブ ) として、 内径 1 . 4 、 外径 1 . 5 mni、 長さ 7 5 mmのものを使用すると、 使用する本数 は 7 2 0本である。  In this case, if a cylindrical hollow tube having an inner diameter of 1.4, an outer diameter of 1.5 mni, and a length of 75 mm is used, the number of tubes used is 720.
また、 円筒状細径中空チューブ ) として、 内径 1 . 1 、 外径 1 . 3 mm、 長さ 7 5 mmのものを使用すると、 使用する本数は 8 90本である。 In addition, if a cylindrical small-diameter hollow tube with an inner diameter of 1.1, an outer diameter of 1.3 mm, and a length of 75 mm is used, the number of tubes used is 8 There are 90.
図 3〜図 4は、 本発明のメタル担体 （MS) に適用される第二実 施態様の細径中空チューブ （t 2 ) を説明する図である。 FIGS. 3 and 4 are diagrams illustrating a small-diameter hollow tube (t 2 ) according to a second embodiment applied to the metal carrier (MS) of the present invention.
第二実施態様の細径中空チューブ （t 2 ) は、 円筒状チューブの ものであり、 所望部位にメタルワイヤ一 （W) による固定部として 凹部 （f n ) を有するものである。 前記細径中空チューブ （t 2 ) は、 凹部 （f 2 ) において、 二枚のリボン状ワイヤー （w3 ， w4 ：),により係止される。 なお、 本発明において、 前記凹部 （f 。 ） に おいて、 単に二本のリボン状ワイヤー （w3 ， W^, ) により係止固 定するだけでなく、 更に前記凹部 （f 2 ) において溶接、 ろう接な どの固着手段を適用してもよい。 The small-diameter hollow tube (t 2 ) of the second embodiment is a cylindrical tube having a concave portion (f n ) at a desired portion as a fixing portion with a metal wire (W). The small-diameter hollow tube (t 2 ) is locked by two ribbon-like wires (w 3 , w 4 :) in the concave portion (f 2 ). In the present invention, Oite in the recess (f.), Just two of the ribbon-like wire (w 3, W ^,) by not only engaging fixed, in yet a recess (f 2) Welding A fixing means such as brazing may be applied.
図 5は、 本発明のメタル担体 （MS) に適用される第三実施態様 の細径中空チューブ （t 3 ) を説明する図である。 FIG. 5 is a diagram illustrating a small-diameter hollow tube (t 3 ) according to a third embodiment applied to the metal carrier (MS) of the present invention.
第三実施態様の細怪中空チューブ （t 3 ) は、 円筒状チューブの ものであり、 所望部位にメタルワイヤー （W) による固定部として 、 チューブ側部に切欠部 （f 3 ) を有するものである。 The microscopic hollow tube (t 3 ) of the third embodiment is a cylindrical tube having a notch (f 3 ) on the side of the tube as a fixing portion with a metal wire (W) at a desired portion. is there.
図 6は、 本発明のメタル担体 （MS) に適用される第四実施態様 の細径中空チューブ （t 4 ) を説明する図である。 FIG. 6 is a diagram illustrating a small-diameter hollow tube (t 4 ) according to a fourth embodiment applied to the metal carrier (MS) of the present invention.
第四実施態様の細径中空チューブ （t 4 ) は、 円筒状で凹凸蛇腹 状の周壁部を有するチューブであり、 メタルワイヤー （W) による 固定部 （f 4 ) は、 前記凹凸の蛇腹部となる。 なお、 第四実施態様 の細径中空チューブ （t 4 ) においては、 その外周壁が凹凸蛇腹状 であるために表面積が円筒状のものより大きくなるため、 触媒担持 量を増大させることが出来る。 The small-diameter hollow tube (t 4 ) of the fourth embodiment is a tube having a cylindrical, uneven bellows-shaped peripheral wall portion, and the fixed portion (f 4 ) made of a metal wire (W) is provided with the uneven bellows portion. Become. In the small-diameter hollow tube (t 4 ) according to the fourth embodiment, since the outer peripheral wall has an uneven bellows shape, the surface area is larger than that of the cylindrical shape, so that the catalyst carrying amount can be increased.
図 7は、 本発明のメタル担体 （MS) に適用される第五実施態様 の細径中空チューブ （t 5 ) を説明する図である。 第五実施態様の細径中空チューブ （t 5 ) は、 円筒状チューブの ものであり、 メタルワイヤー （W) による固定部として、 チューブ の両端面部の壁部に 1Z4周毎に形成された切欠部 （f 5 ) を有す るものである。 FIG. 7 is a view for explaining a small-diameter hollow tube (t 5 ) of a fifth embodiment applied to the metal carrier (MS) of the present invention. The small-diameter hollow tube (t 5 ) of the fifth embodiment is a cylindrical tube, and has a notch formed at every 1Z4 circumference on the wall of both end surfaces of the tube as a fixing portion by a metal wire (W). a shall which have a (f 5).
本発明のメタル担体 （MS) に適用される細径中空チューブ （t ) としては、 前記した断面形状が円形のものに限定されず、 所望形 状のものであってもよい。  The small-diameter hollow tube (t) applied to the metal carrier (MS) of the present invention is not limited to the above-described circular cross-sectional shape, but may have a desired shape.
図 8は、 本発明の第六実施態様の細径中空チューブ （t 6 ) を示 し、 その断面形状は菱形である。 FIG. 8 shows a small-diameter hollow tube (t 6 ) according to a sixth embodiment of the present invention, the cross-sectional shape of which is a rhombus.
図 9は、 本発明の第七実施態様の細径中空チューブ （t 7 ) を示 し、 その断面形状は六角形である。 FIG. 9 shows a small-diameter hollow tube (t 7 ) according to a seventh embodiment of the present invention, whose cross-sectional shape is hexagonal.
また、 特に図示しないが、 断面形状が楕円形のものであってもよ い。  Although not particularly shown, the cross section may be elliptical.
本発明において、 前記細径中空チューブ （t) の構造及びその配 設方式としては、 種々の変形例が可能である。 例えば、 図示しない が、 メタル担体 （MS) の中央部に他部と比較して小径のものを配 設したり、 何種類かのチューブを組み合わせたり してもよい。  In the present invention, various modifications are possible for the structure of the small-diameter hollow tube (t) and the arrangement thereof. For example, although not shown, a metal carrier (MS) having a smaller diameter than the other portion may be provided at the center of the metal carrier (MS), or a combination of several types of tubes may be used.
更に、 本発明において、 これらチューブの配設密度は適宜に決め られる。 例えば、 メタル担体 （MS) の中央部に小径のチューブを 配設すると、 中央部での流速の速い排気ガス流に適合した所望量の 触媒を担持させることが出来るため、 均一な浄化能を達成すること が出来る。  Further, in the present invention, the arrangement density of these tubes is determined as appropriate. For example, if a small-diameter tube is placed at the center of a metal carrier (MS), a desired amount of catalyst suitable for the high-speed exhaust gas flow at the center can be supported, achieving uniform purification performance. You can do it.
また、 細径中空チューブ （t) の配設方式として、 縦方向のみま たは横方向のみに張設されたメタルワイヤーの間に細径中空チュー ブを配設してもよい。 この場合、 上下間または左右間で各細径中空 チューブ （t) を当接させてもよく、 あるいは所望の隙間を設ける ようにしてもよい。 発明の効果 As a method of disposing the small-diameter hollow tube (t), the small-diameter hollow tube may be disposed between metal wires stretched only in the vertical direction or the horizontal direction. In this case, the small-diameter hollow tubes (t) may be brought into contact with each other vertically or horizontally, or a desired gap may be provided. You may do so. The invention's effect
本発明の排気ガス浄化用触媒を担持させるためのメタル担体 （M S ) は、 従来の平板状帯材 （箔材） と波板状帯材 （箔材） から構成 される各種タイプのハニカム構造を有するメタルハニカム体を主要 な構成要素としたメタル担体、 あるいは細径管をメ夕ルケ一シング 内に最密状態に充填して構成したハニカム構造のメタル担体と比較 して、 以下のような優れた効果を奏する。  The metal carrier (MS) for supporting the exhaust gas purifying catalyst of the present invention has various types of honeycomb structures composed of a conventional flat strip (foil) and corrugated strip (foil). Compared to a metal carrier whose main component is a metal honeycomb body or a honeycomb-structured metal carrier in which a small-diameter tube is packed in a close-packed state in a metal casing, the following advantages are obtained. It has the effect.
(i ) 本発明のメタル担体 （M S ) はメタルケ一シング内に細径 中空チュープをメタルワイヤーをもって配設、 固定した構造のもの であるから、 メタル担体の使用時にメタル担体内部に発生する大き な熱応力に基づく変形力を、 前記細径中空メタルチューブ及びメ夕 ルワイヤ一で吸収、 緩和させることが出来るため、 耐久性に優れた ものである。 この点、 従来の帯材 （箔材） を使用したハニカム構造 のメタルハニカム体を主要な構成要素とするメタル担体、 あるいは 、 細径管をメタルケ一シング内に最密充填させたハニカム構造のメ タル担体においては、 前記変形力を吸収、 緩和する能力が低いもの (i) Since the metal carrier (MS) of the present invention has a structure in which a small-diameter hollow tube is arranged and fixed in a metal casing with a metal wire, the large size generated inside the metal carrier when the metal carrier is used. Since the deforming force based on the thermal stress can be absorbed and reduced by the small-diameter hollow metal tube and the metal wire, the durability is excellent. In this respect, a metal carrier having a honeycomb structure metal honeycomb body using a conventional band material (foil material) as a main constituent element, or a honeycomb structure in which a small-diameter tube is closely packed in a metal casing. Tal carrier with low ability to absorb and alleviate the deformation force
^ある。 There is.
(i i) 本発明のメタル担体 （M S ) は、 細径中空チューブのメタ ルワイヤーを介した配列体であることから、 各細径中空チューブと 細径中空チューブの間において排気ガス流を攪拌混合、 乱流化する ことが出来るため、 排気ガスと細径中空チューブ表面に担持された 排気ガス浄化用触媒との接触効率が改善され、 浄化能力を向上させ ることが出来る。 これに対して従来の帯材 （箔材） を使用したもの ゃ細径管をメ夕ルケ一シング内に最密充填させたハニカム構造のも のにおいては、 乱流化のために特別の機構が必要である。 (ii) Since the metal carrier (MS) of the present invention is an array of small-diameter hollow tubes via metal wires, the exhaust gas flow is stirred and mixed between each small-diameter hollow tube and the small-diameter hollow tube. Since turbulence can be obtained, the contact efficiency between the exhaust gas and the exhaust gas purification catalyst carried on the surface of the small-diameter hollow tube is improved, and the purification performance can be improved. On the other hand, a conventional band material (foil material) is used. も A honeycomb structure in which a small-diameter tube is closely packed in a metal casing is also used. In particular, special mechanisms are needed for turbulence.
(i i i ) 本発明のメタル担体 （M S ) において、 各細径中空チュー ブを所望の空隙部をもってメタルワイヤーを介してメタルケ一シン グ内に配列、 固定することが出来るため、 各細径中空チューブが当 接せず、 各チューブの外表面を触媒担持のために有効活用すること が出来る （単位重当たりの比表面積が大きい） 。  (iii) In the metal carrier (MS) of the present invention, since each small-diameter hollow tube can be arranged and fixed in a metal casing through a metal wire with a desired gap portion, The outer surface of each tube can be used effectively for supporting the catalyst (the specific surface area per unit weight is large).
(ί ν) 従来の帯材 （箔材） は極めて高価なものであるが、 本発明 の細径中空チュ一プの配列体で構成されるメタル担体は安価であり 、 コストメ リッ トを得ることが出来る。  (ί ν) The conventional band material (foil material) is extremely expensive, but the metal carrier composed of an array of small-diameter hollow tubes according to the present invention is inexpensive and has a cost advantage. Can be done.
(V) 従来の帯材 （箔材） を利用したハニカム構造のメタルハニ カム体ゃ細径管をメ夕ルケ一シング内に最密充填したメタルハニカ ム体と比較して、 排気ガス系統の要求特性に合わせて最適なメタル 担体を設計の自由度をもって製造することが容易である。 例えば、 メタル担体の中央 （中心部） の配管密度や細管の径を他部と相違さ せるなどして要求特性に適合した最適なメタル担体を容易に提供す ることができる。 産業上の利用可能性  (V) Metal honeycomb body with a honeycomb structure using a conventional band material (foil material) 要求 Required characteristics of the exhaust gas system compared to a metal honeycomb body with a small-diameter tube closely packed in a metal casing It is easy to manufacture the most suitable metal carrier with the freedom of design. For example, it is possible to easily provide an optimal metal carrier that meets the required characteristics by, for example, making the pipe density at the center (central portion) of the metal carrier and the diameter of the thin tube different from those of other portions. Industrial applicability
本発明のメタル担体は、 従来の平板状帯材と波板状帯材 （箔材） を利用したハニカム構造のメタルハニカム体を主要な構成要素とす るメタル担体、 または細径管をメタルケーシング内に最密充填した ハニカム構造のメタル担体と比較して、 熱応力の吸収、 緩和特性、 排気ガス浄化能、 経済性などに優れたものである。  The metal carrier of the present invention is a metal carrier mainly composed of a metal honeycomb body having a honeycomb structure using a conventional flat band material and a corrugated band material (foil material), or a thin-diameter tube formed of a metal casing. Compared to a metal carrier with a honeycomb structure that is closest-packed inside, it is superior in thermal stress absorption, relaxation characteristics, exhaust gas purification performance, economic efficiency, etc.
従って、 本発明のメタル担体は、 排気ガス浄化装置に好適に使用 されるものである。  Therefore, the metal carrier of the present invention is suitably used for an exhaust gas purification device.
3 ― 請 求 の 範 囲 3 ― The scope of the claims
1 . 排気ガスの浄化用触媒を担持するためのメタル担体において、 前記メタル担体が、 1. A metal carrier for supporting a catalyst for purifying exhaust gas, wherein the metal carrier is
(i) 筒状のメ夕ルケ一シング、  (i) cylindrical mail casing,
(i i) 前記メタルケ一シング内に配設される所望本数の任意断面 形状の細径中空チューブ、  (i i) a desired number of small-diameter hollow tubes arranged in the metal casing and having an arbitrary cross-sectional shape;
(i i i) 前記メタルケーシング内に前記細径中空チューブを配列し 、 固定するためのメタルワイヤー、  (i i i) a metal wire for arranging and fixing the small-diameter hollow tubes in the metal casing,
から構成されることを特徵とするメタル担体。 A metal carrier characterized by being composed of:
2 . 細径中空チューブが、 メタルワイヤーを介して、 溶接、 ろう接 、 または拡散接合により固定されるものである請求項 1に記載のメ タル担体。 2. The metal carrier according to claim 1, wherein the small-diameter hollow tube is fixed by welding, brazing, or diffusion bonding via a metal wire.
3 . 細径中空チューブが、 メタルワイヤーにより機械的に係止され る係止部を有するものである請求項 1に記載のメタル担体。 3. The metal carrier according to claim 1, wherein the small-diameter hollow tube has a locking portion that is mechanically locked by a metal wire.
4 . 係止部が、 チューブ側部に形成された凹部、 切欠部、 及び凹凸 部である請求項 3に記載のメタル担体。 4. The metal carrier according to claim 3, wherein the locking portion is a concave portion, a cutout portion, and an uneven portion formed on the tube side portion.
5 . 係止部が、 チューブ端面部に形成された切欠部である請求項 3 に記載のメタル担体。 5. The metal carrier according to claim 3, wherein the locking portion is a notch formed in an end face of the tube.
6 . メタルワイヤーが、 任意断面形状を有する線材である請求項 1 に記載のメタル担体。 6. The metal carrier according to claim 1, wherein the metal wire is a wire having an arbitrary cross-sectional shape.

Claims

7, メタルワイヤーが、 扁平状のリボン材である請求項丄に記載の メ夕ル担体。  7. The mail carrier according to claim 1, wherein the metal wire is a flat ribbon material.
PCT/JP1994/001484 1993-09-09 1994-09-08 Metallic carrier WO1995007142A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4496683T DE4496683T1 (en) 1993-09-09 1994-09-08 Metallic support
GB9600125A GB2295100B (en) 1993-09-09 1994-09-08 Metallic carrier
KR1019950705234A KR960702342A (en) 1993-09-09 1995-11-23 Metal Support (METALLIC SUPPORT)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5/247306 1993-09-09
JP5247306A JPH0780325A (en) 1993-09-09 1993-09-09 Metallic carrier

Publications (1)

Publication Number Publication Date
WO1995007142A1 true WO1995007142A1 (en) 1995-03-16

Family

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Country Link
JP (1) JPH0780325A (en)
KR (1) KR960702342A (en)
DE (1) DE4496683T1 (en)
GB (1) GB2295100B (en)
WO (1) WO1995007142A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63315150A (en) * 1987-06-18 1988-12-22 Yutaka Giken:Kk Catalyst carrier for exhaust gas of car

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4305910A (en) * 1979-02-28 1981-12-15 Mitsui Engineering And Shipbuilding Co., Ltd. Catalytic reaction for reduction of nitrogen oxide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63315150A (en) * 1987-06-18 1988-12-22 Yutaka Giken:Kk Catalyst carrier for exhaust gas of car

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GB9600125D0 (en) 1996-03-20
KR960702342A (en) 1996-04-27
JPH0780325A (en) 1995-03-28
GB2295100A (en) 1996-05-22
GB2295100B (en) 1997-08-27
DE4496683T1 (en) 1996-03-21

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