JP2019105189A - Exhaust emission control device and method for manufacturing and installing exhaust emission control device - Google Patents

Abstract

To provide an inexpensive exhaust emission control device that can effectively oxidize and reduce harmful substances and can be easily manufactured and installed.SOLUTION: An exhaust emission control device 1 is an exhaust emission control device provided in the middle of an exhaust passage for discharging exhaust gas G discharged from an engine E to outside and eliminating harmful substances C included in the discharged exhaust gas G through oxidation and reduction, and includes: a plurality of catalyst carriers 7 formed by supporting a catalyst B for oxidizing and reducing the harmful substances C on a disk-like catalyst support base material 5 having a metallic porous structure; and a bendable tubular holding member 17 holding the plurality of catalyst carriers 7 while they are disposed at predetermined positions, internally fitted to a tubular member 9 to be installed, and joined to the tubular member 9.SELECTED DRAWING: Figure 4

Description

  An exhaust gas purification apparatus provided in the middle of an exhaust path for exhausting exhaust gas exhausted from an engine to the outside and oxidizing and reducing harmful substances contained in the exhaust gas and purifying the same The present invention relates to a method of manufacturing and assembling an exhaust gas purification apparatus and an exhaust gas purification apparatus, which are particularly lightweight, low in cost and easy to manufacture and assemble, which can be effectively arranged corresponding to the temperature distribution of exhaust gas in an exhaust path. It relates to manufacturing and assembling methods.

In a four-wheeled motor vehicle, a two-wheeled motor vehicle, etc., in order to discharge | emit the exhaust gas discharged | emitted from the engine outside, the exhaust route is provided. For example, in the exhaust path of a motorcycle, an exhaust pipe with a curved shape at the upstream position close to the engine, a straight pipe-shaped collecting pipe at the downstream position, and a muffler (silencer) for reducing exhaust noise at the most downstream position It is done.
And an exhaust gas purification device is arranged to the above-mentioned collective pipe which is generally easy to install.

As an exhaust gas purification apparatus, a catalyst support body 101 of a ceramic honeycomb structure having a light weight and an inexpensive weight of about 2.7 as shown in FIG. 17A is mainly used for an automobile four-wheeled vehicle. Further, in the case of a motorcycle for which the vibration stress is high, as shown in FIG. 17B, a heavy metal catalyst support 103 having a heavy specific gravity of about 8.0 is mainly used.
The catalyst carriers 101 and 103 each have a cylindrical or cylindrical shape elongated in the axial direction Y along the exhaust path, and are provided with a large number of minute holes 105 penetrating in the axial direction Y. In addition, the size and the number (roughness of the eye) of the holes 105 are structurally difficult to change in a secondary manner.

Further, Patent Documents 1 and 2 below disclose an exhaust gas purification device provided with a catalyst support having a disk shape short in the axial direction Y which can be disposed on a curved exhaust path.
Among them, in Patent Document 1, an exhaust gas purifier having a configuration in which a large number of disc-shaped catalyst carriers and porous filters are alternately arranged in a curved pipe, a disk-shaped catalyst carrier and porous bodies. There is disclosed an exhaust gas purification apparatus in which an annular metal ring is externally fitted to the outer peripheral portion of a filter and adjacent metal rings are connected by a bellows-like member.

  On the other hand, Patent Document 2 discloses an exhaust gas purification apparatus in which three disk-shaped foam porous three-dimensional structure catalysts are disposed as catalyst carriers in a curved pipe line. Further, in Patent Document 2, a cylindrical foam porous three-dimensional structure catalyst, a wire three-dimensional structure catalyst, and a punching metal three-dimensional structure are substituted for the above-mentioned disk-like foam porous three-dimensional structure catalyst. It is disclosed that a catalyst can be used as a catalyst carrier.

JP 2007-138875 A Unexamined-Japanese-Patent No. 10-212938

However, the catalyst carriers 101 and 103 elongated in the axial direction Y shown in FIGS. 17 (a) and 17 (b) described above can be disposed only at straight portions on the exhaust path such as the above-described collecting pipe. Therefore, if the catalyst supporting members 101 and 103 can be installed in the exhaust pipe, which would normally be closer to the engine and have a higher temperature, high exhaust gas purification performance can be expected, but the exhaust pipe becomes curved due to the layout. Therefore, the catalyst carriers 101 and 103 can not be installed in the exhaust pipe.
Further, the catalyst supporting member 103 having a metal honeycomb structure has a portion which is not used for purification of exhaust gas, which is wasteful and heavy and expensive. In addition, since the catalyst supporting members 101 and 103 having a honeycomb structure have a large pressure loss, the exhaust efficiency is deteriorated, which may cause a reduction in the output of the engine.

Further, in the exhaust gas purification device disclosed in Patent Documents 1 and 2 in which the catalyst support is provided in the curved portion of the exhaust path, the pipe path in which the catalyst support is provided is "split" in the axial direction Y. It is generally manufactured by arranging a plurality of catalyst carriers at a predetermined position and then overlapping the two divided pipeline elements or connecting them with a bellows and joining them by welding or the like. .
However, with such a manufacturing method, the number of welds increases, the productivity of the exhaust gas purification device deteriorates, and the cost of the exhaust gas purification device increases. On the other hand, if the catalyst support can be installed by pushing the catalyst support into a non-half-rounded tubular pipe, the labor and the like of the welding can be eliminated, but the posture can not be stabilized simply by pushing the catalyst support. It is difficult to install a catalyst carrier. In addition, the catalyst carrier and the pipe can not be sufficiently fixed.

  The present invention has been made based on these points, and the object of the present invention is to be installed in both the straight portion and the curved portion of the exhaust gas exhaust path, without dividing the installed pipeline member in half An exhaust gas purification apparatus and exhaust gas purification apparatus capable of accurately and reliably installing a catalyst carrier at a predetermined position, being excellent in exhaust gas purification performance and purification adjustment ability, easy to manufacture and assemble, and capable of manufacturing at low cost It is to provide a method of manufacturing and assembling the device.

In order to achieve the above object, an exhaust gas purification apparatus according to claim 1 of the present invention is provided in the middle of an exhaust path for exhausting exhaust gas discharged from an engine to the outside, and harmful substances contained in the discharged exhaust gas An exhaust gas purifier that purifies and oxidizes by reducing
A catalyst support formed by supporting a catalyst that oxidizes and reduces harmful substances on a disc-like catalyst support base having a metallic porous structure;
And a bendable tubular holding member that holds the catalyst carrier in a predetermined position and is fitted into the tubular member to be installed, and is joined to the tubular member. It is

  According to a second aspect of the present invention, in the exhaust gas purification apparatus according to the first aspect, the exhaust gas purification apparatus is provided for an exhaust pipe which is a tubular member existing upstream of an exhaust path close to an engine. It is characterized by being.

  The exhaust gas purification apparatus according to claim 3 is the exhaust gas purification apparatus according to claim 2, wherein the exhaust gas purification apparatus is any one of the upstream end and the downstream end of the exhaust pipe, or It is characterized in that it is provided on both sides.

  In the exhaust gas purification apparatus according to a fourth aspect of the present invention, in the exhaust gas purification apparatus according to any one of the first to third aspects, the catalyst supporting member sinters a plurality of sheets having a mesh structure and then sinters the sheets. It is characterized in that it is molded using a catalyst-supporting base material constituted by the above.

  In the exhaust gas purification apparatus according to a fifth aspect of the present invention, in the exhaust gas purification apparatus according to the fourth aspect, the catalyst carrier changes the mesh roughness by adjusting the number of sheets to be used in an overlapping manner. Then, it is characterized in that it is configured to exhibit optimum catalyst supporting performance for each harmful substance to be oxidized and reduced.

  The exhaust gas purification apparatus according to claim 6 is the exhaust gas purification apparatus according to any one of claims 1 to 5, wherein the plurality of catalyst carriers have an optimum catalyst composition for each harmful substance to be oxidized and reduced. It is characterized in that it is constructed to have an optimum temperature range corresponding to the harmful substance to be oxidized and reduced.

  An exhaust gas purification apparatus according to claim 7 is the exhaust gas purification apparatus according to any one of claims 1 to 6, wherein the tubular holding member and the catalyst supporting base are both formed of metal, and the tubular The peripheral portion of the catalyst carrier at a portion joined to the end portion of the holding member is characterized in that it is axially compressed and joined in a flattened state.

  According to an eighth aspect of the present invention, in the exhaust gas purification apparatus according to any one of the first to seventh aspects, the tubular holding member is fitted in a tubular member to be installed, and is formed in accordance with the shape of the tubular member. It is characterized in that it is constituted by a bellows tube having flexibility and an outer diameter which can be pushed.

The exhaust gas purification apparatus according to claim 9 is the exhaust gas purification apparatus according to any one of claims 1 to 8, wherein the exhaust gas purification apparatus is a joining side end member joined to a tubular member to be installed When,
A first catalyst carrier having one end bonded to the other end of the bonding side end member;
A first bellows pipe having a predetermined length, one end of which is joined to the other end of the first catalyst carrier;
A second catalyst carrier whose one end is joined to the other end of the first bellows pipe;
A second bellows pipe of a predetermined length, one end of which is joined to the other end of the second catalyst carrier;
A third catalyst carrier whose one end is joined to the other end of the second bellows pipe;
One end is joined to the other end of the third catalyst carrier, and the other end is connected in series to an insertion side end member joined to the tubular member. It is.

  Further, a method of manufacturing and assembling an exhaust gas purification apparatus according to claim 10 of the present invention manufactures an exhaust gas purification apparatus provided with a plurality of catalyst carriers and a flexible tubular holding member, and the exhaust gas purification apparatus A method of manufacturing and assembling an exhaust gas purification apparatus, comprising: assembling the exhaust gas purification apparatus at a predetermined position of a tubular member constituting an exhaust path of exhaust gas discharged from an engine, A manufacturing process for obtaining a gas purification apparatus, and an assembling process of inserting the manufactured exhaust gas purification apparatus into the tubular member, joining it to the tubular member, and assembling it to the tubular member. It is a thing.

In the method for manufacturing and assembling an exhaust gas purification apparatus according to claim 11 of the present invention, in the method for manufacturing and assembling an exhaust gas purification apparatus according to claim 10, a bellows pipe is used as the tubular holding member,
In the above manufacturing process, the bellows pipe is joined to the left and right of the catalyst carrier at the middle part, and the bellows pipe and the joint side member are joined to the left and right of the catalyst carrier at the joint end. At the side end, the exhaust gas purification device is configured by joining the insertion side end member and the bellows pipe to the left and right of the catalyst carrier,
In the assembling step, the exhaust gas purification apparatus is inserted into the tubular member starting from the insertion side end member side, and when the terminal end on the joining side end member is inserted into the tubular member, the insertion side end portion The exhaust gas purification apparatus is assembled to the tubular member by joining the member and the joining side end member and the tubular member.

Further, in the method of manufacturing and assembling an exhaust gas purification apparatus according to claim 12 of the present invention, in the method of manufacturing and assembling an exhaust gas purification apparatus according to claim 10 or 11, a mesh structure is used as the catalyst carrier. After stacking a plurality of sheets, a sheet carrying a catalyst that oxidizes and reduces harmful substances is used for the sintered catalyst supporting base material,
The peripheral portion of the catalyst carrier at a portion joined to the tubular holding member, the joining side end member and the insertion side end member is axially compressed and flattened and then joined by welding. It is characterized by

And the following effects can be obtained by the above means. That is, according to the exhaust gas purification apparatus of the present invention, since the catalyst supporting body having the disk-like catalyst supporting base of the metal porous structure is used, it is compact at low cost, and the place and the number are not limited. It becomes possible to apply a catalyst support.
In addition, since a bendable tubular holding member is used as holding means for the catalyst support, the tubular holding member in a state where the catalyst support is previously set and held at a predetermined position is fitted inside the tubular member. By mounting it, it is possible to accurately arrange the required number of catalyst supports in the required positions.

  Further, when the exhaust gas purification device is provided for the exhaust pipe which is a tubular member existing at the upstream position of the exhaust path close to the engine, the purification action of harmful substances becomes active, exhaust gas purification in a higher temperature range Since it becomes possible to arrange the device, the conversion efficiency of the catalyst supported by the catalyst carrier becomes large, and the purification performance of the exhaust gas by the catalyst is improved.

Further, when the exhaust gas purification device is provided at the upstream end of the exhaust pipe, the conversion efficiency of the catalyst is maximized, and the purification performance of the exhaust gas by the catalyst is further improved. In addition, when the exhaust gas purification device is provided at the downstream end of the exhaust pipe, the conversion efficiency for harmful substances whose operation becomes active in a state where the temperature is lowered by being far from the engine is improved. become.
In addition, when the exhaust gas purifier is provided at both the upstream end and the downstream end of the exhaust pipe, the exhaust gas can cope with various harmful substances having different temperatures at which the operation becomes active. It becomes possible to provide an exhaust gas purification device excellent in purification performance.

  In addition, when a catalyst supporting base configured by sintering a plurality of sheets having a mesh structure is used as the catalyst supporting body, the size of the mesh is adjusted to a necessary size. It is possible to obtain a metal wire forming a thick mesh structure, and by sintering it, the connection between the metal wires forming the mesh structure becomes strong, and a stable catalyst purification performance can be exhibited. Become.

In addition, if the catalyst support performance is optimized for each harmful substance to be oxidized / reduced by changing the roughness of the mesh by adjusting the number of sheets to be used superimposed, it is possible to perform oxidation. -It becomes possible to provide an exhaust gas purification device excellent in purification performance corresponding to the type of harmful substance to be reduced.
In addition, since the change in the mesh roughness of the catalyst support is performed by adjusting the number of sheets to be overlapped, it is easy to cover various types of catalyst supports having different mesh roughness. It can be created.

  In addition, the catalyst support is configured to have an optimum catalyst composition for each harmful substance to be oxidized and reduced, and when it is divided into optimum temperature ranges corresponding to the harmful substance to be oxidized and reduced, oxidation and reduction are performed. An exhaust gas purification apparatus can be provided which can further improve the purification performance of the exhaust gas by the catalyst composition and the arrangement excellent in the purification performance corresponding to the types of harmful substances.

  Further, the tubular holding member and the catalyst supporting base are both formed of metal, and the peripheral portion of the catalyst supporting body at a portion to be joined with the end of the tubular holding member is axially compressed and flattened. In the case of bonding in a corrugated state, bonding of the tubular holding member and the catalyst supporting base material can be performed easily and reliably, and the bonding state of the both becomes strong due to the increase in the contact area of the bonding portion.

  Further, in the case where the above-mentioned tubular holding member is formed by a bellows pipe which is fitted inside a tubular member and has flexibility and an outer diameter which can be pushed along the shape of the tubular member, It is possible to position the catalyst carrier at an optimum position that conforms to the shape of the tubular member to which the shape of the tubular holding member placed at the position is secondarily deformed and installed.

  Further, the exhaust gas purification apparatus includes: a joining side end member; a first catalyst carrier; a first bellows pipe having a predetermined length; a second catalyst carrier; a second bellows pipe having a predetermined length; When the catalyst carrier and the insertion side end member are connected in series, the length of the first bellows pipe and the length of the second bellows pipe can be varied to change the three types. The arrangement interval of the catalyst support can be freely adjusted, and the three types of catalyst support can be accurately positioned at optimum positions.

Further, according to the method of manufacturing and assembling the exhaust gas purification apparatus according to the present invention, the catalyst carrier is attached in advance to the predetermined position of the tubular holding member in the manufacturing process, so the catalyst carrier is assembled to the tubular member in the assembling process. Even in the state, the catalyst support maintains the same arrangement.
In addition, since the tubular member into which the exhaust gas purification device is inserted in the assembling step is the joint portion of the exhaust gas purification device, attachment of the catalyst carrier to the tubular member is facilitated.

  Further, a bellows pipe is used as the tubular holding member, and the bellows pipe, the bellows pipe and the joint side end member or the bellows pipe and the insertion side end member are joined on the left and right sides of the catalyst carrier in the manufacturing process. In this case, the use of the bellows pipe makes it possible to secondarily freely deform the exhaust gas purification device, and facilitates the assembly of the exhaust gas purification device to the tubular member. Further, by bonding in a state in which the catalyst support is sandwiched in the middle, the bonding strength at the bonding portion becomes strong.

In addition, when a plurality of sheets of mesh structure are stacked as the catalyst supporting base, the mesh size of the catalyst supporting base can be freely set by changing the number of sheets to be stacked. It becomes possible to adjust. In addition, in the case of using a sheet which has been sintered at once after stacking a plurality of sheets, it is possible to form an efficient, waste-free catalyst-supporting base material, thereby reducing part cost. .
Further, the bellows support, the joint end member or the insertion end member, and the catalyst carrier can be joined by compressing the peripheral portion of the catalyst carrier in the axial direction and crushing it into a flat surface and then welding. In this case, end face welding at the joint portion becomes easy, so the welding strength becomes strong.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a perspective view which shows the exhaust-path components containing the muffler which applied the exhaust gas purification apparatus of this invention to the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a partially broken perspective view which shows the state which applied the exhaust gas purification apparatus of this invention to the upstream edge part of an exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a disassembled perspective view which shows the exhaust gas purification apparatus of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a sectional side view which shows the exhaust gas purification apparatus of this invention. It is a figure which shows the 1st Embodiment of this invention, and is an enlarged view of the arrow A part in FIG. 4 which shows the exhaust gas purification apparatus of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and it is a disassembled perspective view (a) which shows a catalyst support base material, and a perspective view (b) which shows a catalyst support body. FIG. 1 is a view showing a first embodiment of the present invention, and is a partially broken perspective view showing a state where the exhaust gas purification device of the present invention is applied to the downstream end of an exhaust pipe. The figure which shows the 1st Embodiment of this invention, and is a partially broken perspective view which shows the state which applied the exhaust gas purification apparatus of this invention to both the upstream end of an exhaust pipe, and the downstream end. is there. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is explanatory drawing which shows the manufacturing and assembling method of the exhaust gas purification apparatus of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a top view which shows the insertion apparatus and holding apparatus which are used when assembling | attaching the exhaust gas purification apparatus of this invention to a tubular member. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a side view which shows the insertion apparatus and holding apparatus which are used when assembling | attaching the exhaust gas purification apparatus of this invention to a tubular member. It is a graph which shows the relationship between the conversion efficiency of the harmful substance contained in exhaust gas, and temperature. (Source: (Germany) Traffic Safety and Environment Research Institute, FY 2001 Forum "Influence of catalyst temperature behavior in cold regions on nitrous oxide (N2O) emissions" page 1 https://www.ntsel.go.jp/forum /13files/13-14p.pdf) It is explanatory drawing which shows the temperature distribution of the exhaust-path components surface connected to an engine. (Source: Japan Avionics Co., Ltd. Application example Test, evaluation and inspection Thermal image collection "bike muffler" http://www.avio.co.jp/products/infrared/appli/rd.html) It is a figure which shows the 2nd Embodiment of this invention, and is sectional drawing which shows the state which applied the exhaust gas purification apparatus of this invention to each of the upstream part, middle part, and downstream part of an exhaust pipe. The figure which shows the 2nd Embodiment of this invention, is an enlarged view of the arrow F part in FIG. 4 which shows the exhaust gas purification apparatus of this invention, It is sectional drawing (a) which shows the example of joining by plug welding It is sectional drawing (b) which shows the example of joining by arc spot welding. It is a figure which shows the 2nd Embodiment of this invention, and is sectional drawing which shows the insertion apparatus used when assembling | attaching the exhaust gas purification apparatus of this invention to a tubular member. It is a figure which shows the conventional exhaust gas purification apparatus, and is a perspective view which shows the thing (a) of honeycomb structure made of ceramics, and the thing (b) of honeycomb structure made of metal.

Hereinafter, the configuration of the exhaust gas purification apparatus of the present invention and the contents of the method of manufacturing and assembling the exhaust gas purification apparatus will be specifically described by taking the illustrated embodiment as an example.
In the following description, first, the configuration of the exhaust gas purification system according to the first embodiment of the present invention will be specifically described based on FIGS. 1 to 8 and FIGS. 12 and 13. Next, differences between the conventional exhaust gas purification device and the exhaust gas purification device of the present invention will be described based on FIGS. 1 to 8, 12, 13 and 17, and the exhaust gas purification device of the present invention will be described. Mention action, effect. Next, the contents of the method of manufacturing and assembling the exhaust gas purification device of the present invention will be specifically described along the flow of manufacture and assembly of the exhaust gas purification device based on FIGS. 9 to 11.

(1) Configuration of exhaust gas purification apparatus (see FIGS. 1 to 8, 12 and 13)
The exhaust gas purification apparatus 1 of the present invention is provided in the middle of an exhaust path for exhausting the exhaust gas G discharged from the engine E to the outside, and oxidizes / reduces harmful substances C contained in the discharged exhaust gas G. Is a device that
Specifically, a catalyst supporting body 7 formed by supporting the catalyst B for oxidizing and reducing the harmful substance C on the disc-like catalyst supporting base 5 having a porous structure of metal, and the catalyst The present invention includes a bendable tubular holding member 17 which holds the carrier 7 in a predetermined position and which is fitted into the tubular member 9 to be installed and which is joined to the tubular member 9. The exhaust gas purification device 1 is basically configured.

Note that FIG. 1 shows an exhaust path component 19 connected to the engine E for a motorcycle, and the exhaust path component 19 is greatly curved and directed rearward after one end 21 is connected to the engine E As a plurality of exhaust pipes 11 extending in a curve, a straight tubular collecting pipe 13 connected to the other end 23 of the exhaust pipes 11, and a silencer connected to the collecting pipe 13 to reduce exhaust noise It is comprised as an example by providing the functioning muffler 15.
Further, in the present embodiment, the exhaust gas purification device 1 is provided as an example for one end 21 serving as the upstream end of the exhaust pipe 11, which is the tubular member 9 located at the upstream position of the exhaust path close to the engine E. ing. In addition, the exhaust gas purification device 1 may be provided for the other end 23 which is the downstream end of the exhaust pipe 11 as shown in FIG. 7, and as shown in FIG. It is also possible to provide for both the one end 21 and the other end 23.

The catalyst carrier 7 is mainly composed of a mesh-structured sheet 3 formed by cutting a wire net-like sheet member formed by knitting a plurality of metal wire rods into a grid shape, as an example. Have as.
Then, after stacking a plurality of sheets 3 having such a mesh structure, the catalyst supporting base 5 configured by sintering is used.
In addition, there is a base material of a catalyst support for purifying exhaust gas manufactured and sold by Nichidai Filter Co., Ltd. as a commercial product of such a catalyst support base 5, and the base of the catalyst support is used as the catalyst support base 5. It can be used as an example.

Further, in the present embodiment, the catalyst supporting base material 5 is configured by stacking a plurality of the sheets 3 described above, and in this case, the mesh is adjusted by adjusting the number of the sheets 3 used by stacking. It is configured to be able to exhibit the optimum catalyst supporting performance for every harmful substance C which is oxidized and reduced by changing the roughness of the mesh size.
Furthermore, the catalyst support 7 is configured by supporting the catalyst supporting base 5 with a catalyst B for oxidizing and reducing the harmful substance C. The harmful substances C to be purified include hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx), etc. Catalyst B for oxidizing and reducing these harmful substances C includes platinum A three-way catalyst consisting of (Pt), palladium (Pd) and rhodium (Rh) is used as a core, and silver, manganese, iron, cobalt, copper, vanadium, zinc, iridium (Ir) etc. are added as cocatalysts to support them. Can be used as an example.

Incidentally, in the catalyst supporting body for exhaust gas purification manufactured and sold by the above-mentioned Nichidai Filter Co., Ltd., palladium (Pd) is used as the catalyst B, and the disc-like base material of the cut mesh structure is used. applying a sol solution prepared by adding palladium nitrate, those baked formed at about 650 ° C. after drying is used.

Further, the plurality of catalyst carriers 7 described above are configured to have the optimum composition of the catalyst B for each toxic substance C to be oxidized and reduced, and are divided into optimum temperature ranges corresponding to the harmful substance C to be oxidized and reduced. Is preferably installed.
Further, in the present embodiment, the tubular holding member 17 is formed by the bellows tube 25 having a flexibility and an outer diameter which can be inserted into the tubular member 9 to be installed and can be pushed along the shape of the tubular member 9. ing.

Further, in the present embodiment, three of the catalyst carriers 7 and two of the tubular holding members 17 are provided, and further, two end members 27 are provided at both ends of these, and the exhaust gas purification device is provided. 1 is configured.
Specifically, in the exhaust gas purification apparatus 1 according to the present embodiment, a joining side end member 27A in which the one end 29A is joined to one end 21 of the tubular member 9 to be installed, and the joining side end member 27A. A first catalyst support 7A having one end 33A joined to the other end 31A, and a first bellows pipe 25A having a predetermined length L1 having one end 37A joined to the other end 35A of the first catalyst support 7A; The second catalyst carrier 7B has one end 33B joined to the other end 39A of the first bellows pipe 25A, and the other end 35B has a predetermined length L2 to one end 37B joined to the second catalyst carrier 7B. The third catalyst carrier 7C having one end 33C joined to the second bellows pipe 25B and the other end 39B of the second bellows pipe 25B and one end 29B joined to the other end 35C of the third catalyst carrier 7C , And the other end 31 B is internally fitted into the inside of the tubular member 9 It is constructed by connecting the inlet-side end member 27B, a serial manner.

  Further, the catalyst supporting base material 5 in the two end members 27A, 27B, the two bellows pipes 25A, 25B as the tubular holding members 17, and the three catalyst carriers 7A, 7B, 7C are all The peripheral portion 41 of the catalyst carrier 7A, 7B, 7C at the portion joined to the end portions 37A, 37B and 39A, 39B of the tubular holding members 17A, 17B is made of stainless steel and compressed in the axial direction Y And they are joined together in a squashed condition.

  Among them, the joint side end member 27A and the insertion side end member 27B are formed in the same shape and the same size as one example, and are attached to the outer part connected to the engine E or another part of the exhaust path part 19. A short-cylindrical socket 43 is provided, inside of which is a curved inner fold 45 having a diameter decreasing towards the inside, and a flange 47 having a flat end surface having a diameter increasing towards the outside at the inside. Is equipped. The dimensions of the end members 27A and 27B configured in this way are set such that the outer diameter D1 is 30 to 40 mm as an example, the inner diameter d1 is 20 to 30 mm as an example, and the length L3 is 10 to 15 mm as an example ing.

The catalyst carriers 7A, 7B, 7C are formed, for example, in the same shape and the same size, and substantially function as a filter to fit in the end members 27A, 27B or the bellows pipes 25A, 25B. The outer diameter D2 of 40 is set to be equal to or somewhat smaller than the inner diameter d1 of the end members 27A, 27B.
The thickness T1 of the main body 40 is, for example, about 4 mm, and the thickness T2 of the peripheral edge 41 is, for example, about 1 mm. Further, the outer diameter D3 of the catalyst carriers 7A, 7B, 7C including the peripheral portion 41 is set to substantially the same size as the outer diameter D1 of the end members 27A, 27B.

The first bellows pipe 25A and the second bellows pipe 25B are formed to have the same shape and the same size as one example in the present embodiment, and one end 37A that abuts on the peripheral portion 41 of the catalyst carrier 7A, 7B, 7C. A flange portion 49 having flat end surfaces is provided at 37 B and the other ends 39 A, 39 B.
Further, 12 inner folds 51 are disposed between the flanges 49 at both ends, and 11 outer folds 53 are disposed at equal pitches between the inner folds 51 as an example. The outer diameter D4 of the first bellows pipe 25A and the second bellows pipe 25B thus configured is set to substantially the same size as the outer diameter D1 of the end members 27A and 27B, and the first bellows The inner diameter d4 of the pipe 25A and the second bellows pipe 25B is set to substantially the same size as the inner diameter d1 of the end members 27A and 27B.

Further, the length L1 of the first bellows pipe 25A and the length L2 of the second bellows pipe 25B are set to the same dimensions in the present embodiment, and are set to about 60 mm as an example.
The length L1 of the first bellows pipe 25A and the length L2 of the second bellows pipe 25B have a role of determining the mounting positions of the second catalyst carrier 7B and the third catalyst carrier 7C, and hence the attachment The length L1 of the first bellows pipe 25A and the length L2 of the second bellows pipe 25B are appropriately adjusted in accordance with the positions of the second catalyst carrier 7B and the third catalyst carrier 7C.

Further, in the present embodiment, the two end members 27A and 27B, the three catalyst carriers 7A, 7B and 7C, and the two bellows pipes 25A and 25B improve the SUS 304 or heat resistance as an example. These joints are made by, for example, MAG welding or TIG welding.
Further, the joining of the joint portion between the end members 27A and 27B at the both ends and the engine E or another part of the exhaust path part 19 is, for example, TIG welding, spot welding, seam welding, arc spot welding, laser welding, etc. It is done by

(2) Differences from conventional exhaust gas purification devices (see FIGS. 1 to 8 and FIGS. 12 to 14)
Heretofore, as the exhaust gas purification apparatus, the catalyst carrier 101 having a ceramic honeycomb structure shown in FIG. 14 (a) described above and the catalyst carrier 103 having a metal honeycomb structure shown in FIG. 14 (b) are often used. It had been. Since these catalyst carriers 101 and 103 are cylindrical or cylindrical long in the axial direction Y, they can not be installed on the curved exhaust pipe 11 close to the engine E, and a straight tubular collecting pipe 13 far from the engine E Only one was provided using.

The harmful substance C contained in the exhaust gas G becomes active in a high temperature range of 300 ° C. or higher as shown in FIG. 12, but in the collecting pipe 13 separated from the engine E as shown in FIG. In some cases, the temperature of the exhaust gas G is lowered to less than 300 ° C. The numbers in the scale in FIG. 13 represent the surface temperature of the exhaust path component 19. The temperature of the exhaust gas G varies depending on the displacement of the engine E, but is about 100 to 240 ° C. as an example. This figure shows the temperature change of the exhaust gas G. While converting from the surface temperature, the temperature of the exhaust gas G becomes about 500 to 600 ° C. in a portion close to the engine E, It can be seen that the temperature of the exhaust gas G is as low as less than 300.degree.
Therefore, in the configuration of the conventional catalyst carriers 101 and 103 provided in the collecting pipe 13, effective oxidation and reduction of the harmful substance C contained in the exhaust gas G have not been performed.

On the other hand, in the exhaust gas purification apparatus 1 according to the present embodiment, the exhaust gas purification apparatus 1 can be installed even on a curved tubular member 9 such as the exhaust pipe 11 due to the presence of the bendable tubular holding member 17. Is configured as.
Further, in the present embodiment, since the mounting position is changed and the plurality of catalyst carriers 7 are provided, when the temperature range in which the harmful substance C contained in the exhaust gas G becomes active is different, It is possible to distribute catalyst supports 7 at positions corresponding to the respective temperature ranges.

(3) Operation and effect of the exhaust gas purification device (see FIGS. 1 to 8 and 12 and 13 and 17)
Therefore, in the present embodiment, the harmful substance C can be oxidized and reduced in a high temperature region where the operation becomes active by installing the exhaust gas purification device 1 in the exhaust pipe 11 close to the engine E. As shown, it is possible to provide the exhaust gas purification device 1 at a position corresponding to the peak around 300 ° C. and the peak around 550 ° C. at which the action of the harmful substance C becomes active, or to arrange the respective catalyst carriers 7 Because of this, in this way, effective oxidation and reduction can be achieved for a plurality of harmful substances C having different temperatures at which operation becomes active.

In addition, the exhaust gas purification apparatus 1 according to the present embodiment can be installed not only on the straight line portion but also on the curved line portion of the exhaust gas G exhaust path, and the catalyst carrier can be obtained without halving the tubular member 9 to be installed. It is possible to accurately and reliably install 7 in a predetermined position.
As a result, it is possible to provide the exhaust gas purification device 1 which is excellent in the purification performance and the purification adjustment ability of the exhaust gas G, is easy to manufacture and assemble, and is low in cost.

(4) Contents of manufacturing and assembling method of exhaust gas purification device (refer to FIGS. 9 to 11)
The method of manufacturing and assembling the exhaust gas purification apparatus according to the present invention manufactures the exhaust gas purification apparatus 1 including the catalyst carrier 7 and the bendable tubular holding member 17. A method of manufacturing and assembling an exhaust gas purification apparatus for assembling at a predetermined position of the tubular member 9 constituting an exhaust path of the exhaust gas G discharged from the exhaust gas, comprising a manufacturing process P1 and an assembling process P2. It is composed of
Hereinafter, the contents of the manufacturing process P1 and the assembling process P2 will be specifically described along the flow of the manufacturing and assembling of the exhaust gas purification device 1.

(A) Manufacturing process (see FIG. 9)
The manufacturing process P1 is a process of bonding the catalyst carrier 7 and the tubular holding member 17 to obtain the exhaust gas purification device 1.
That is, in the present embodiment, two end members 27A and 27B, three catalyst carriers 7A, 7B and 7C, and two bellows pipes 25A and 25B, which are formed to predetermined dimensions in advance, are prepared. In the middle portion, the first bellows pipe 25A and the second bellows pipe 25B are joined by welding as an example to the left and right of the second catalyst carrier 7B.
Further, at the joint side end, the joint side end member 27A and the first bellows pipe 25A are joined by welding as an example to the left and right of the first catalyst support 7A. Further, at the insertion side end, the second bellows pipe 25B and the insertion side end member 27B are joined by welding as an example to the left and right of the third catalyst carrier 7C.

Then, as the catalyst supporting body 7, after stacking a plurality of sheets 3 of mesh structure, the catalyst supporting base 5 which has been sintered is made to support the catalyst B described above which oxidizes and reduces the harmful substance C. Can be used.
Further, as described above, the peripheral portions 41 of the catalyst carriers 7A, 7B, 7C at the portions to be joined to the two bellows pipes 25A, 25B, the joining side end member 27A or the insertion side end member 27B, After being compressed in the direction Y and crushed flat, they are joined by welding.

(B) Assembling process (see FIGS. 9 to 11)
The assembling step P2 is a step of inserting the manufactured exhaust gas purification device 1 from the one end 21 side of the tubular member 9, joining the end 29A to the one end 21 of the tubular member 9, and assembling it to the tubular member 9. It is.
That is, in the present embodiment, the exhaust gas purification device 1 is inserted into the tubular member 9 with the insertion side end member 27B side as the starting end, and the end 29A of the joining side end member 27A is the one end 21 of the tubular member 9 The exhaust gas purification device 1 is assembled to the tubular member 9 by welding the socket portion 43 of the joining side end member 27A and the one end 21 of the tubular member 9 inscribed therein by welding when they are inserted to almost the same position. .

When the exhaust gas purification device 1 is assembled to the tubular member 9, the insertion device 55 and the holding device 57 shown in FIGS. 10 and 11 are used as an example. The tubular member 9 is placed on and supported by the mounting bases 59, 59 which are disposed in accordance with the shape of the tubular member 9. At one end 21 of the tubular member 9, a clamp 61 which is a component of a holding device 57 for holding the one end 21 is disposed.
The clamp 61 is configured as an example by including a fixed clamp 63 and a movable clamp 65. By operating the lever switch 67 of the holding device 57, the movable clamp 65 is advanced or retracted to one end of the tubular member 9. 21 is configured so as to be able to sandwich and hold or to release the sandwiching state.

On the other hand, the insertion device 55 is supported by the mounting table 59, 59 described above, and the insertion head 69 is provided in a state where the axial center coincides with one end 21 of the tubular member 9 held by the holding device 57. A cylinder rod 71 and a cylinder body 73, and an operation switch 75 for supplying hydraulic pressure or air pressure to the cylinder body 73 to move the insertion head 69 forward or backward is provided as an example.
Then, when the exhaust gas purification device 1 is assembled to the tubular member 9, the connection side end member 27A of the exhaust gas purification device 1 is fitted to the insertion head 69 and the insertion head 69 is advanced to complete the exhaust gas purification device 1 To the inside of the tubular member 9 until it is inserted. After completion of the insertion, the operation switch 75 is operated to retract the insertion head 69, and the lever switch 67 is operated to retract the movable clamp 65 to release the clamp. Then, as described above, the tubular member 9 into which the exhaust gas purification device 1 is inserted is removed from the holding device 57 and the joining side end member 27A of the exhaust gas purification device 1 is welded to one end 21 of the tubular member 9 Do.

    Further, the insertion side end member 27B of the exhaust gas purification device 1 and the tubular member 9 are joined by welding. As a welding method, welding can be performed by arc spot welding, plug welding, MAG welding, TIG welding, laser welding or the like.

Then, according to the method of manufacturing and assembling the exhaust gas purification apparatus according to the present embodiment thus configured, the exhaust gas purification apparatus 1 having the above-mentioned excellent characteristics can be easily manufactured and manufactured. Since the device 1 can be freely changed in shape by providing the bellows pipes 25A and 25B, the assembly of the exhaust gas purification device 1 is smooth also for the curved tubular member 9 like the exhaust pipe 11 Will be implemented.
Further, the exhaust gas purification device 1 is inserted into the tubular member 9 from the insertion side end member 27B side in the above assembling process, and assembled so that the end of the joint side end member 27A substantially coincides with one end of the tubular member 9 Since the distance from one end of the tubular member 9 to each catalyst support 7A, 7B, 7C becomes constant, the mounting position of the catalyst support 7A, 7B, 7C becomes accurate.

Second Embodiment (See FIGS. 14 to 15)
In the exhaust gas purification apparatus 1 according to the second embodiment of the present invention, in the exhaust gas purification apparatus 1 according to the first embodiment described above, only one catalyst carrier 7 is provided, and the catalyst carrier 7 is carried. In this embodiment, tubular holding members 17 are provided on both sides of the body 7.
Therefore, the description of the configuration common to the first embodiment is omitted here, and a description will be given focusing on the specific configuration of the above-described present embodiment.
First, in the present embodiment, one catalyst support 7 and two bellows pipes 25 as the bendable tubular holding members 17 are provided, and further, end members 27 are provided at both ends of the bellows pipes 25. Are integrally provided.

  Specifically, as shown in FIG. 15, the exhaust gas purification apparatus 1 according to the present embodiment includes a first bellows pipe 25C provided with an end member 27C joined to the tubular member 9, and the first bellows pipe A second bellows pipe comprising a catalyst carrier 7D whose one end is joined to the other end of 25C, and an end member 27D whose one end is joined to the other end of the catalyst carrier 7D and whose other end is joined to the tubular member 9 It is comprised by connecting 25D in series.

  Further, in the present embodiment, three exhaust gas purification devices 1 of the above configuration are provided at three locations on the upstream side, middle stream side, and downstream side of the tubular member 9, one for each exhaust gas purification device 1. A total of three catalyst carriers 7D, 7E, 7F are arranged. Then, when the temperature range in which the operation of the harmful substance C contained in the exhaust gas G is different is different, the catalyst carrier 7 having different catalytic characteristics is provided by distributing to the position corresponding to each temperature range. It is possible.

The exhaust gas purification apparatus 1 according to the present embodiment is also applicable to the exhaust gas purification apparatus 1 for the curved tubular member 9 such as the exhaust pipe 11 due to the presence of the bellows pipe 25 which is the bendable tubular holding member 17. Are configured to be installed.
That is, when assembling the exhaust gas purification device 1 to the tubular member 9, the tubular member 9 can be inserted from one end or the other end side of the tubular member 9 and held at a predetermined position. Specifically, when the exhaust gas purification device 1 is inserted into the tubular member 9, the above-mentioned insertion device 55 and holding device 57 are used as an example, but the insertion device 55 is bent as shown in FIG. A possible insertion head 77 is used. As the insertion head 77, a bendable core metal structure used for pipe bending can be used as an example.

Then, the tubular member 9 into which the exhaust gas purification device 1 is inserted is removed from the holding device 57 and the end members 27C and 27D of the exhaust gas purification device 1 are welded and joined to the tubular member 9 as described above. Specifically, as shown in FIG. 15 (a), a plurality of welding holes are previously provided at appropriate positions of the tubular member 9, and the inserted end member 27 and the periphery of the holes are welded by MAG welding or arc welding. Join by plug welding 79. In addition, if the attachment position of the exhaust gas purification device 1 is defined by the position of the hole, the catalyst carrier 7 can be joined in a state of being accurately positioned at the time of insertion into the tubular member 9.
Further, as shown in FIG. 15 (b), the end member 27 inserted into the appropriate position of the tubular member 9 and the tubular member 9 are joined by arc spot welding 80. The inserted exhaust gas purification apparatus 1 is positioned by attaching a stopper to the insertion head 77 of the insertion device 55 and positioning the stopper when the stopper reaches a predetermined position such as the end face of the tubular member 9. It is possible.

  And, with the exhaust gas purification device 1 according to the present embodiment configured as described above, the same operation and effect as the exhaust gas purification device 1 according to the above-described first embodiment can be exhibited. Moreover, according to the present embodiment, the structure is simple and the manufacture is easy, the assembly to the tubular member and the bonding are easy, and the manufacturing can be performed inexpensively. Further, the exhaust gas purification devices 1 can be attached to any desired position of the tubular member, and the exhaust gas purification capacity can be maximized.

Other Embodiments
The exhaust gas purification apparatus 1 and the method of manufacturing and assembling the exhaust gas purification apparatus of the present invention are not limited to those of the above-described embodiment, and modifications within the scope of the invention are possible.
For example, as the catalyst supporting base material 5 of the catalyst supporting body 7, in addition to the structure in which a plurality of sheets 3 of the mesh structure described in the embodiment described above are stacked, porous metal such as porous metal or lotus metal It is also possible to use a disc-shaped one.

Further, the tubular holding member 17 is not limited to the bellows pipe 25 described in the above embodiment, but at least the shape can be freely changed at the time of assembly, and at least the required heat resistance and mechanical strength after assembly. It is also possible to use other tubular retaining members of different structure, material or process.
Further, the manufacturing method is not limited to the insertion method, and for example, after the exhaust gas purification device 1 is set in the straight tubular exhaust pipe 11 before bending, water is put in the exhaust pipe 11, and then it is frozen and bent It is also possible to form the exhaust gas purification device 1 integrally with the exhaust pipe 11.

In addition, the number of the catalyst carriers 7 is not limited to three as in the embodiment described above, and may be one or two, or four or more.
Similarly, the number of tubular holding members 17 is not limited to two, and may be one or three or more.
Further, the shape of the exhaust gas purification device 1 and the size of each part can be appropriately changed in accordance with the shape and the size of the tubular member 9 to which the exhaust gas purification device 1 is applied. For example, it is also possible to arrange the exhaust gas purification device 1 in the middle part of the tubular member 9. In addition, when using a long tubular holding member 17 that extends the entire length of the tubular member 9, it is possible to join the exhaust gas purification device 1 at both one end 21 and the other end 23 of the tubular member 9. is there.

Further, one end of the tubular member 9 is not limited to the portion shown in the above-described embodiment. For example, the end portion of the tubular member 9 may be a portion slightly inward of the end. Further, joining is not limited to welding as described above, and other joining means such as brazing and caulking can be used.
In addition, although the tubular member 9 shows the case where the exhaust pipe 11 is used as an example, the exhaust gas purification device 1 of the present invention is a component provided in the collective pipe 13 and various exhaust paths provided depending on the type of vehicle to be applied. It is also possible to set up
In addition, although the shape of the catalyst supporting base 5 is a disc-like one, the term "circle" used herein is not limited to a perfect circle, but may be a shape close to other circles such as an ellipse or an oval. Is possible.

  INDUSTRIAL APPLICABILITY The exhaust gas purification apparatus and exhaust gas purification apparatus of the present invention are manufactured and assembled using the exhaust gas purification apparatus for oxidizing and reducing harmful substances contained in exhaust gas discharged from an engine, and the field of use It is possible to use an exhaust gas purifier that can be used particularly in an effective exhaust gas purification apparatus that can be effectively oxidized and reduced, can be easily manufactured and assembled, and can be used.

Reference Signs List 1 exhaust gas purification apparatus 3 sheet 5 catalyst supporting base 7 catalyst supporting body 9 tubular member 11 exhaust pipe 13 collecting pipe 15 muffler (silencer)
17 Tubular holding member 19 Exhaust path part 21 (at a tubular member) one end (upstream end)
23 (Tubular member) Other end (downstream end)
25 Bellows tube 27 end member 29 one end 31 (of end member) 31 the other end 33 (of catalyst support) one end 35 (of the catalyst support) other end 37 (of the tubular support member) one end 39 The other end 40 (tubular holding member) body portion 41 peripheral portion 43 socket portion 45 (for end member) inner fold 47 (for end member) flange portion 49 (for tubular holding member) flange portion 51 (for tubular holding member ) Internal fold 53 (Tubular holding member) Outer fold 55 Insertion device 57 Holding device 59 Holding device 61 Mounting base 61 Clamp 63 Fixed clamp 65 Movable clamp 67 Lever switch 69 Insertion head 71 Cylinder rod 73 Cylinder body 75 Operation switch 77 Insertion head Body 79 Plug welding P1 Manufacturing process P2 Assembly process E Engine G Exhaust gas C Hazardous substance S Particulate etc. B Catalyst L Length T Thickness Y Axial direction D Outer diameter d inner diameter

Claims (12)

An exhaust gas purifier is provided in the middle of an exhaust path for exhausting exhaust gas discharged from an engine to the outside, and oxidizing and reducing harmful substances contained in the discharged exhaust gas for purification.
A catalyst support formed by supporting a catalyst that oxidizes and reduces harmful substances on a disc-like catalyst support base having a metallic porous structure;
And a bendable tubular holding member that holds the catalyst carrier in a predetermined position and is fitted into the tubular member to be installed, and is joined to the tubular member. Exhaust gas purification device.   The exhaust gas purification device according to claim 1, wherein the exhaust gas purification device is provided for an exhaust pipe which is a tubular member existing at an upstream position of an exhaust path close to an engine.   3. The exhaust gas purification apparatus according to claim 2, wherein the exhaust gas purification apparatus is provided at either or both of the upstream end and the downstream end of the exhaust pipe.   The catalyst support is formed by using a catalyst-supporting base configured by sintering a plurality of sheets having a mesh structure and then sintering the sheets. The exhaust gas purification device described in.   The catalyst supporting body is configured to change the roughness of mesh mesh by adjusting the number of sheets to be used by overlapping and to exhibit optimum catalyst supporting performance for each harmful substance to be oxidized and reduced. The exhaust gas purification apparatus according to claim 4, wherein   The catalyst support is configured to have an optimum catalyst composition for each harmful substance to be oxidized and reduced, and is characterized by being divided into optimum temperature ranges corresponding to the harmful substance to be oxidized and reduced. The exhaust gas purification apparatus according to any one of claims 1 to 5.   The tubular holding member and the catalyst supporting base are both made of metal, and the peripheral portion of the catalyst supporting body at a portion joined to the end of the tubular holding member is axially compressed and flattened flatly The exhaust gas purification apparatus according to any one of claims 1 to 6, which is joined in a closed state.   The tubular holding member is characterized in that it is constituted by a bellows tube which is fitted inside the tubular member to be installed, and which has flexibility and an outer diameter which can be pushed along the shape of the tubular member. The exhaust gas purification device according to any one of to 7. The exhaust gas purification apparatus includes a joining side end member joined to a tubular member to be installed;
A first catalyst carrier having one end bonded to the other end of the bonding side end member;
A first bellows pipe having a predetermined length, one end of which is joined to the other end of the first catalyst carrier;
A second catalyst carrier whose one end is joined to the other end of the first bellows pipe;
A second bellows pipe of a predetermined length, one end of which is joined to the other end of the second catalyst carrier;
A third catalyst carrier whose one end is joined to the other end of the second bellows pipe;
The other end of the third catalyst carrier is connected in series with an insertion-side end member, one end of which is joined and the other end of which is joined to the tubular member. The exhaust gas purification device according to any one of Items 1 to 8. An exhaust gas purification apparatus comprising a catalyst carrier and a bendable tubular holding member is manufactured, and the exhaust gas purification device is assembled at a predetermined position of a tubular member constituting an exhaust path of exhaust gas discharged from an engine. A method of manufacturing and assembling an exhaust gas purification device,
Manufacturing the exhaust gas purification apparatus by joining the catalyst carrier and the tubular holding member;
Manufacturing and assembling the exhaust gas purifier characterized by including an assembling step of inserting the manufactured exhaust gas purifier into the tubular member, joining it to the tubular member and assembling it to the tubular member. Method. Use a bellows pipe as the above-mentioned tubular holding member,
In the above manufacturing process, the bellows pipe is joined to the left and right of the catalyst carrier at the middle part, and the bellows pipe and the joint side member are joined to the left and right of the catalyst carrier at the joint end. At the side end, the exhaust gas purification device is configured by joining the insertion side end member and the bellows pipe to the left and right of the catalyst carrier,
In the assembling step, the exhaust gas purification apparatus is inserted into the tubular member starting from the insertion side end member side, and when the terminal end on the joining side end member is inserted into the tubular member, the insertion side end portion 11. The method of manufacturing and assembling an exhaust gas purification device according to claim 10, wherein the exhaust gas purification device is assembled to the tubular member by joining the member and the joint side end member and the tubular member. As the above-mentioned catalyst supporting body, one obtained by supporting a catalyst which oxidizes / reduces harmful substances to a sintered catalyst supporting base material after laminating a plurality of sheets of mesh structure is used,
A peripheral portion of the catalyst carrier at a portion joined to the tubular holding member, the joining side end member and the insertion side end member is axially compressed, flatted and then joined. A method of manufacturing and assembling the exhaust gas purification device according to claim 10 or 11,

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