JP2016109106A - Exhaust emission control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust emission control system that can remove a predetermined substance from an exhaust gas, prevent a failure such as deformation and the like, and continuously be used.SOLUTION: The exhaust emission control system 10 for causing an exhaust gas to pass therethrough to remove the predetermined substance contained in the exhaust gas with a metal catalyst includes: a metal frame member 20 providing a cylindrical shape; and multiple metal plate-like members 30 arranged in an interior 21 of the metal frame member 20, of which plate surface 31 is aligned and held along a direction A connecting both opening parts 22, 23 of the metal frame member 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an exhaust gas purification device, and more particularly to an exhaust gas purification device that removes a predetermined substance with a metal catalyst.

  Conventionally, exhaust gas exhausted from engines contains hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx), etc., and exhaust gas purification that removes these using catalytic reaction A catalyzer as a device is provided. As a catalyst for exhaust gas purification of this catalyzer, a ceramic catalyst in which a catalyst body is supported on a honeycomb-shaped ceramic carrier formed of ceramic, or a metal honeycomb catalyst in which a catalyst body is supported on a honeycomb-shaped metal carrier formed of metal (See Patent Document 1).

  In recent years, as a catalyst having higher substance removal performance than these catalysts, a catalyst having a wire mesh structure in which a catalyst body is supported on a carrier made of a metal wire metal mesh and formed in a spiral shape has been proposed.

Japanese Patent Laid-Open No. 9-300031

  However, in the catalyzer using the wire mesh catalyst formed in a spiral shape as described above, there is a possibility that the central portion may be deformed by repeated use, resulting in an unusable state. There was a possibility of becoming. Therefore, the present inventor investigated the cause and found that the high-temperature exhaust gas easily passes through the central portion of the catalyzer, so that the heat of the exhaust gas tends to concentrate on the central portion, and means for releasing the heat is further provided. Therefore, it has been found that the central portion is easily deformed by heat.

  The present invention has been made in view of such circumstances, and is capable of removing a predetermined substance from the exhaust gas, preventing and coping with problems such as deformation, and continuously usable exhaust gas purification. An object is to provide an apparatus.

  In order to achieve the above object, the invention described in claim 1 is an exhaust gas purifying apparatus that removes a predetermined substance contained in the exhaust gas by a metal catalyst by passing the exhaust gas through the inside. A metal frame member having a shape, and a metal catalyst that is disposed inside the metal frame member and held side by side along a direction connecting both openings of the metal frame member is supported. An exhaust gas purifying apparatus having a plurality of metal plate-like members is provided.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, a holding portion for holding the metal plate member is provided on the inner surface of the metal frame member, and the openings of both the metal frame members. The metal plate member is held by the holding portion. The metal plate-like member is held by the holding portion.

  The invention described in claim 3 is characterized in that, in addition to the configuration described in claim 1 or 2, the metal frame member has a rectangular tube shape.

  According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the metal plate member is composed of a metal wire-made wire mesh carrying a metal catalyst. It is characterized by.

  According to a fifth aspect of the present invention, in addition to the configuration according to any one of the first to fourth aspects, the metal plate-shaped member includes a metal flat member on which a metal catalyst is supported, and a metal catalyst. The metal corrugated member overlaps with the metal corrugated member.

  In addition to the structure as described in any one of Claims 1 thru | or 5, the invention of Claim 6 is comprised so that the said metal plate-shaped member can be attached and detached with respect to the said metal frame member. It is characterized by.

  According to the first aspect of the present invention, since the plurality of metal plate-like members carrying the metal catalyst are held by the metal frame member, the metal plate-like members are repeatedly heated by the high-temperature exhaust gas. However, since each metal plate member is connected to the metal frame member, the heat accumulated in the metal plate member can be easily released to the metal frame member, and heat is released from the metal frame member to the outside. be able to. As a result, the metal plate-like member carrying the metal catalyst can be prevented from causing thermal deformation or the like continuously compared to the conventional catalyst device in which the metal member carrying the metal catalyst is spirally formed. It can be set as the exhaust gas purification apparatus which can be used.

  According to the second aspect of the present invention, since the holding portion for holding the metal plate member is formed on the inner surface of the metal frame member, the metal plate member is surely secured to the determined position of the metal frame member. Can be held. As a result, it is possible to reliably realize a state in which a predetermined substance is efficiently removed and exhaust efficiency, and heat accumulated in the metal plate member can be surely released to the metal frame member. In addition, since the work can be performed along the holding portion when the metal plate member is attached, the work for attaching the metal plate member can be easily and reliably performed.

  According to the third aspect of the present invention, since the metal frame member has a rectangular tube shape, the metal frame member can be easily arranged with respect to other members than the cylindrical one, and can be installed without waste in space.

  According to the invention described in claim 4, since the metal plate-like member is composed of a metal wire-made wire mesh on which a metal catalyst is supported, a larger surface area can be obtained in the same space. As a result, the metal plate member can come into contact with more exhaust gas, and more predetermined substances can be removed.

  According to the fifth aspect of the present invention, the metal plate-like member is formed by overlapping the metal flat member carrying the metal catalyst and the metal corrugated member carrying the metal catalyst. Compared to the case where metal corrugated members are lined up by partitioning them with metal flat members, it is possible to form a state in which exhaust gas flows more easily, and problems such as entanglement even when the metal members are in contact with each other. It can be made difficult to occur.

  According to the sixth aspect of the present invention, the metal plate-like member carrying the metal catalyst is configured to be freely attached to and detached from the metal frame member. Even if it becomes unusable due to such a situation, only a part of the metal plate-like members can be exchanged. As a result, the cost can be reduced without wasting the members, compared to the case where the entire exhaust gas purification device is replaced.

  Furthermore, since only the metal plate member can be replaced with the metal frame member, the metal plate member is replaced with another for a car or device having different specifications, such as different types of substances to be removed. Thus, the metal frame member can be used in common. As a result, costs can be reduced when manufacturing a plurality of types of exhaust gas purification apparatuses.

It is a longitudinal cross-sectional view which shows the exhaust apparatus provided with the catalyzer which concerns on Embodiment 1 of this invention. It is a perspective view which shows the catalyzer which concerns on the same embodiment. It is a perspective view which shows the metal plate-shaped member which concerns on the same embodiment. It is an enlarged view of the metal plate-shaped member of FIG. It is a perspective view which shows the metal frame member which concerns on the same embodiment. It is a perspective view which shows the catalyzer which concerns on Embodiment 2 of this invention. FIG. 7 is a front view of FIG. 6. It is a perspective view which shows the metal plate-shaped member which concerns on the same embodiment. It is a perspective view which shows the metal frame member which concerns on the same embodiment. It is a front view which shows the catalyzer which concerns on Embodiment 3 of this invention. It is a perspective view which shows the hole non-corrugated member which comprises the metal plate-shaped member which concerns on the embodiment. It is a perspective view which shows the corrugated member with a hole which comprises the metal plate-shaped member which concerns on the embodiment. It is a perspective view which shows the holeless flat plate member which comprises the metal plate-shaped member which concerns on the embodiment. It is a perspective view which shows the flat plate member with a hole which comprises the metal plate-shaped member which concerns on the embodiment. It is a perspective view which shows the 1st example of the metal plate-shaped member which concerns on the embodiment. It is a perspective view which shows the 2nd example of the metal plate-shaped member which concerns on the same embodiment. It is a perspective view which shows the 3rd example of the metal plate-shaped member which concerns on the same embodiment. It is a perspective view which shows the 4th example of the metal plate-shaped member which concerns on the same embodiment. It is a perspective view which shows the 5th example of the metal plate-shaped member which concerns on the same embodiment. It is a schematic plan view which shows the modification of the metal plate-shaped member which concerns on Embodiment 1 of this invention.

Embodiments of the present invention will be described below.
[Embodiment 1 of the present invention]
First, Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 is a longitudinal sectional view showing an exhaust device 1 provided with a catalyzer 10 according to Embodiment 1 of the present invention. In the following description and drawings, “upstream side” and “downstream side” indicate the upstream side and the downstream side of the flow of exhaust gas.

  The exhaust device 1 includes a catalyzer 10 as an exhaust gas purification device that purifies exhaust gas exhausted from an engine, and includes a connection pipe 2 connected to a cylinder head of the engine, and an upstream side in which one end is connected to the connection pipe 2. The rear end portion of the downstream taper tube 4 includes a taper tube 3, a catalyzer 10 connected to the other end of the upstream taper tube 3, and a downstream taper tube 4 connected to the downstream end of the catalyzer 10. For example, an exhaust pipe, a silencer, and the like are connected.

  The catalyzer 10 includes a rectangular tube-shaped metal frame member 20 and a plurality of metal plate members 30 that are disposed in the interior 21 of the metal frame member 20 and carry a predetermined metal catalyst. Yes. Detailed description will be given later.

  The connection pipe 2 includes a flange portion 2a in which bolt holes 2b and 2b are opened when the exhaust device 1 is attached to the cylinder head with bolts, and a pipe portion 2c attached to the flange portion 2a. The upstream taper tube 3 includes a small-diameter tube portion 3a attached to the outer peripheral surface of the tube portion 2c of the connection tube 2, a large-diameter tube portion 3b attached to the inner surface of a metal frame member 20 (described later) of the catalyzer 10, It consists of the taper part 3c which connects each of the small diameter pipe part 3a and the large diameter pipe part 3b integrally. In addition, the small diameter pipe part 3a of the upstream taper pipe 3 has a substantially circular shape in cross section in accordance with the shape of the connection pipe 2 to be connected, and the large diameter pipe part 3b has a shape of the metal frame member 20 to be connected. According to the shape, the cross-sectional view has a substantially square shape. Therefore, the taper portion 3c is formed so as to change from a substantially circular shape in cross section to a substantially square shape in cross section from the small diameter tube portion 3a to the large diameter tube portion 3b.

  The downstream taper tube 4 includes a large diameter tube portion 4a attached to the inner surface of the metal frame member 20, a small diameter tube portion 4b formed with a smaller diameter than the large diameter tube portion 4a, a large diameter tube portion 4a, and a small diameter tube. It consists of the taper part 4c which connects each of the part 4b integrally. The large-diameter pipe portion 4a of the downstream side taper pipe 4 has a substantially square shape in cross section in accordance with the shape of the metal frame member 20 to be connected, and the small-diameter pipe portion 4b has an exhaust pipe to be connected, a muffler The cross-sectional view is substantially circular according to the shape of the vessel. Therefore, the taper portion 4c is formed so as to change from a substantially square shape in cross section to a substantially circular shape in cross section from the large diameter tube portion 4a to the small diameter tube portion 4b.

  Hereinafter, the catalyzer 10 of the present embodiment will be described.

  As shown in FIGS. 2 and 5, the metal frame member 20 of the catalyzer 10 is a rectangular tube-shaped member made of stainless steel, can withstand high temperatures, and has good thermal conductivity. In addition, as shown in FIG. 5, the metal frame member 20 is formed by combining two upper and lower members 20A and 20B having the same U shape in a cross-sectional view, and as a result of the combination, the upstream first member is formed. It is a rectangular tube-shaped member having a substantially square shape in cross section in which the opening 22 and the second opening 23 on the downstream side are formed.

  Further, the metal frame member 20 of the present embodiment is formed with a plurality of holding portions 24 for holding a plurality of metal plate-like members 30. Each of the holding portions 24 is composed of a plurality of slit portions along a direction A connecting the first opening 22 and the second opening 23 of each of the upper and lower portions, and a metal plate member to be described later 30 attachment portions 33 are inserted and held. And, with respect to the lower member 20B of the metal frame member 20, the mounting portions 33 of the metal plate members 30 are inserted and held in the plurality of holding portions 24, respectively, and the upper member 20A is overlapped and attached, brazed, By welding or the like, a plurality of metal plate-like members 30 are arranged in the interior 21 of the metal frame member 20 so that the plate surface 31 extends along the direction A connecting both the openings 22 and 23 of the metal frame member 20. The arranged catalyzer 10 can be used.

  As shown in FIGS. 3 and 4, the metal plate member 30 of the catalyzer 10 includes a main body portion 32 and a plurality of attachment portions 33. The main body 32 is made of a wire mesh made of a metal wire carrying a predetermined metal catalyst made of platinum (Pt), rhodium (Rh), palladium (Pd), etc., as shown in FIG. It is configured in a three-dimensional shape. Thereby, the surface area which the exhaust gas which passes here and the metal plate-shaped member 30 contact increases, and it becomes easier to remove a substance. In addition, attachment portions 33 for attachment to the holding portion 24 of the metal frame member 20 are formed above and below the main body portion 32. Here, a plurality of protrusion-like attachment portions 33 are formed at equal intervals in the vertical direction, and each is inserted and held in the holding portion 24. The metal plate member 30 is fixed by brazing, welding, or the like after the attachment portion 33 is inserted and held in the holding portion 24 of the metal frame member 20. By the metal plate member 30, substances such as HC, CO, NOx in the exhaust gas are removed, and the exhaust gas is purified. The wire diameter of the metal wire used for the metal plate member 30 is 0.1 to 1 mm.

When exhaust gas is passed from the upstream side (first opening 22) of the catalyzer 10 thus configured toward the downstream side (second opening 23), the plate surface 31 and the second opening 22 are connected to the second opening 22. Exhaust gas comes into contact with the plurality of metal plate-like members 30 arranged along the direction A connecting the openings 23 to remove a predetermined substance. At the same time, the heat absorbed by the metal plate member 30 from the exhaust gas is released to the metal frame member 20 from locations where the metal plate member 30 contacts the upper and lower mounting portions 34 and the metal frame member 20 of the main body portion 32. The heat can be released from the metal frame member 20 to the outside. As a result, the metal plate-like member 30 carrying the metal catalyst can be prevented from causing thermal deformation and the like, compared with the conventional catalyst device in which the metal member carrying the metal catalyst is spirally formed. The catalyzer 10 can be used.
[Embodiment 2 of the present invention]
Next, a second embodiment of the present invention will be described with reference to FIGS. Note that, for example, the description of the same configuration as that of the first embodiment of the present invention in the present embodiment such as a portion other than the catalyzer in the exhaust device 1 is omitted.

  FIG. 6 is a perspective view showing a catalyzer 110 according to Embodiment 2 of the present invention.

  Similarly to the first embodiment, the catalyzer 110 includes a rectangular metal frame member 120 and a plurality of metal plates disposed on the interior 121 of the metal frame member 120 and carrying a predetermined metal catalyst. It has the shape member 130 and is comprised.

  Among these, the metal frame member 120 is a rectangular tube-shaped member made of stainless steel, as shown in FIGS. 6, 7, and 9. Also, the metal frame member 120 is formed by combining two upper and lower members 120A and 120B having the same U shape in cross section as in the first embodiment. As a result of the combination, the upstream side The first opening portion 122 and the downstream second opening portion 123 are formed in a square tube-shaped member having a substantially square shape in cross section (see FIG. 9).

  Further, the metal frame member 120 of the present embodiment is formed with a plurality of holding portions 124 for holding the plurality of metal plate members 130. Each of the holding portions 124 includes a holding groove along a direction A connecting the first opening 122 and the second opening 123 on the upper and lower sides, and a metal plate member 130 described later is inserted into the holding groove 124. It is configured to hold in. Then, the upper and lower members 120A and 120B of the metal frame member 120 are overlapped, and in this state, the metal plate member 130 is inserted and held in the holding grooves of the plurality of holding portions 124, and then brazed, welded, or the like. Thus, a plurality of metal plate-like members 130 are arranged in the interior 121 of the metal frame member 120 so that the plate surface 131 extends along the direction A connecting both the openings 122 and 123 of the metal frame member 120. The catalyzer 110 can be used.

  As shown in FIG. 8, the metal plate member 130 of the catalyzer 110 is composed only of the main body 132. The main body 132 is made of a wire mesh made of a metal wire material carrying a predetermined metal catalyst made of platinum (Pt), rhodium (Rh), palladium (Pd), etc., and has a three-dimensional shape. ing. Here, in the present embodiment, the attachment portion 33 as in the first embodiment is not formed above and below the main body portion 132. This is because the holding portion 124 of the metal frame member 120 is formed of a holding groove, and can be held without a projection or the like. By this metal plate member 130, substances such as HC, CO, NOx in the exhaust gas are removed, and the exhaust gas is purified.

When exhaust gas is passed from the upstream side (first opening portion 122) to the downstream side (second opening portion 123) of the catalyzer 110 configured in this way, the plate surface 131 and the first opening portion 122 and the second opening portion are passed through. Exhaust gas comes into contact with the plurality of metal plate-like members 130 arranged along the direction A connecting the openings 123 to remove a predetermined substance. At the same time, the heat absorbed by the metal plate member 130 from the exhaust gas can be released to the metal frame member 120 from locations where the metal plate member 120 contacts the upper and lower metal frame members 120, and the metal frame member 120. Heat can be released from the outside. As a result, compared to the conventional catalyst device in which the metal member carrying the metal catalyst is spirally formed, the metal plate-like member 130 carrying the metal catalyst can be prevented from being thermally deformed and continuously. The catalyzer 110 can be used.
[Embodiment 3 of the present invention]
Next, Embodiment 3 of the present invention will be described with reference to FIGS. Note that, for example, the description of the same configuration as in the first and second embodiments of the present invention in the present embodiment, such as a portion other than the catalyzer in the exhaust device 1, is omitted.

  FIG. 10 is a front view showing a catalyzer 210 according to Embodiment 3 of the present invention.

  Similarly to the first embodiment, the catalyzer 210 includes a rectangular metal plate member 220 and a plurality of metal plates disposed on the interior 221 of the metal frame member 220 and carrying a predetermined metal catalyst. It has the shape member 230 and is comprised.

  Among these, the metal frame member 220 is a rectangular tube-shaped member made of stainless steel as shown in FIG. In addition, the metal frame member 220 may be formed by combining two upper and lower members of the same shape having a substantially U-shaped cross-sectional view, as in the first embodiment described above, or may have a substantially rectangular shape in cross-sectional view. It may be composed of one member.

  In addition, the metal frame member 220 of the present embodiment is not formed with a plurality of holding portions for holding the metal plate member 230 as in the first and second embodiments. In the present embodiment, as will be described later, the metal plate member 230 is configured by combining a metal corrugated plate member 240 and a metal flat plate member 250, and has a predetermined thickness. Further, since the adjacent metal plate members 230 are in contact with each other via the metal flat plate member 250, if the metal plate members 230 are arranged side by side inside the metal frame member 220, a thin plate member Compared to the case, the metal plate member 230 is less displaced. Therefore, even if it does not have a holding part, metal plate-like member 230 can be held.

  As shown in FIG. 10, the metal plate-like member 230 of the catalyzer 210 is configured by combining a metal corrugated plate member 240 carrying a metal catalyst and a metal flat plate member 250 carrying a metal catalyst. The corrugated metal plate member 240 and the flat metal plate member 250 are constituted by plate-like members on which a predetermined metal catalyst made of platinum (Pt), rhodium (Rh), palladium (Pd), or the like is supported. The metal plate-like member 230 removes substances such as HC, CO, and NOx in the exhaust gas and purifies the exhaust gas.

  When exhaust gas is passed from the upstream side (first opening 222) of the catalyzer 210 thus configured toward the downstream side (second opening (not shown)), the plate surfaces 241 and 251 open to the first opening. The exhaust gas comes into contact with the plurality of metal plate-like members 230 arranged along the direction connecting the portion 222 and the second opening (not shown), and a predetermined substance is removed. At the same time, the heat absorbed by the metal plate member 230 from the exhaust gas can be released to the metal frame member 220 from locations where it contacts the upper and lower metal frame members 220 of the metal plate member 230. Heat can be released from the outside. As a result, the metal plate-like member 230 carrying the metal catalyst can be prevented from causing thermal deformation and the like, compared with the conventional catalyst device in which the metal member carrying the metal catalyst is formed in a spiral shape. The catalyzer 210 can be used.

  In addition, the following variations exist in the metal plate-like member 230 of the present embodiment. First, as the corrugated metal plate member 240, there are two types of the corrugated metal plate member 240A (see FIG. 11) and the corrugated metal plate member 240B (see FIG. 12), and the flat metal plate member 250 has no holes. There are two types of flat metal plate member 250A (see FIG. 13) and perforated metal flat plate member 250B (see FIG. 14). Then, by combining these, as shown in FIG. 16, the metal plate member 230A of the first example constituted by the combination of the holeless metal corrugated plate member 240A and the holeless metal flat plate member 250A, as shown in FIG. Further, the metal plate member 230B of the second example constituted by the combination of the holed metal corrugated member 240B and the holeless metal flat plate member 250A, as shown in FIG. 17, the holeless metal corrugated member 240A and the holed metal. The metal plate member 230C of the third example configured by a combination of the flat plate members 250B, and the fourth example of the fourth example configured by the combination of the perforated metal corrugated plate member 240B and the perforated metal flat plate member 250B as shown in FIG. A metal corrugated plate member 230D, and a corrugated metal plate member 240C and a perforated metal flat plate member 250B formed by pressing a metal mesh made of a metal wire material as shown in FIG. 19 into a corrugated shape as shown in FIG. of It includes variations such as the fifth example of the metal plate member 230E configured in mating.

  Thus, according to the catalyzer 10, 110, 210 of these embodiments, the plurality of metal plate members 30, 130, 230, 230A to 230E carrying the metal catalyst are formed into the metal frame members 20, 120, 220. Therefore, even if the metal plate members 30, 130, 230, 230A to 230E are repeatedly heated by the high-temperature exhaust gas, the respective metal plate members 30, 130, 230, 230A to 230E are heated. By being connected to the metal frame members 20, 120, 220, the heat accumulated in the metal plate members 30, 130, 230, 230A to 230E can be easily released to the metal frame members 20, 120, 220, Heat can be released from the metal frame members 20, 120, and 220 to the outside. As a result, the metal plate-like members 30, 130, 230, 230A to 230E carrying the metal catalyst are subjected to thermal deformation or the like as compared with the catalyst device in which the metal member carrying the metal catalyst is spirally formed. The catalyzer 10, 110, 210 that can be prevented from being raised and can be used continuously can be obtained.

  Further, the catalyzer 10, 110, 210 of these embodiments is formed by holding a plurality of metal plate members 30, 130, 230, 230A to 230E on the metal frame members 20, 120, 220 by insertion or the like. Therefore, it is superior to the conventional catalyst device in which the metal member is formed in a spiral shape, and can be easily manufactured.

  Further, according to these embodiments, since the metal frame members 20, 120, 220 have a rectangular tube shape, they are easier to arrange with respect to other members than the cylindrical shape, and are installed without waste in space. be able to.

  Further, according to the second embodiment and the third embodiment of the invention, the metal plate members 130, 230, 230A to 230E carrying the metal catalyst are attached to and detached from the metal frame members 120, 220. Since it is configured freely, even if some of the metal plate members 130, 230, 230A to 230E are deformed and become unusable, some of the metal plate members 130, 230 , 230A-230E can be exchanged. As a result, the cost can be reduced without wasting a member as compared with the case where the entire catalyzer 110, 210 is replaced.

  Furthermore, since only the metal plate-like members 130, 230, 230A to 230E can be replaced with the metal frame members 120, 220, the metal can be applied to vehicles and apparatuses having different specifications such as different types of substances to be removed. By replacing the plate-like members 130, 230, 230A to 230E with other members, the metal frame members 120, 220 can be used in common. As a result, costs can be reduced when manufacturing a plurality of types of catalyzers 110 and 210.

  Further, according to the catalyzer 10 and 110 of the first embodiment and the second embodiment of the invention, the holding portions 24 and 124 that hold the metal plate members 30 and 130 are formed on the inner surfaces of the metal frame members 20 and 120. Therefore, the metal plate members 30 and 130 can be reliably held with respect to the determined positions of the metal frame members 20 and 120. As a result, it is possible to reliably realize a state in which a predetermined substance is efficiently removed and exhausted efficiently, and the heat accumulated in the metal plate members 30 and 130 can be surely released to the metal frame members 20 and 120. it can. In addition, since the work can be performed along the holding parts 24 and 124 when the metal plate members 30 and 130 are attached, the work of attaching the metal plate members 30 and 130 can be easily and reliably performed. .

  Further, according to the first embodiment and the second embodiment of the invention, the metal plate-like members 30, 130 are composed of a metal wire-made wire mesh carrying a metal catalyst. A large surface area can be obtained. As a result, the metal plate-like members 30 and 130 can come into contact with more exhaust gas, and more predetermined substances can be removed.

  Further, according to the third embodiment of the invention, the metal plate member 230 is configured such that the metal flat member 250 carrying the metal catalyst and the metal corrugated member 240 carrying the metal catalyst overlap each other. By separating the metal corrugated members 240 with the metal flat members 250, it is possible to form a state in which exhaust gas flows more easily than when only the metal corrugated members 240 are arranged, and the metal plate members 230 are Even if they are in contact with each other, problems such as entanglement can be made difficult to occur.

  The embodiment described above is described in order to facilitate understanding of the present invention, and is not described in order to limit the present invention.

  For example, the metal frame member is not limited to stainless steel, and may be made of other metals as long as it can withstand high temperatures and has good thermal conductivity. Further, the metal frame member is not limited to a rectangular tube shape having a substantially positive shape in cross section, and may be a rectangular tube shape having a substantially rectangular shape in cross section. It may be a shape. However, since a plurality of metal plate-like members having the same shape can be disposed in the rectangular tube shape, there is an advantage that manufacturing is easy and manufacturing cost can be reduced.

  Further, for example, in Embodiment 1 of the invention, the shape of the wire mesh of the main body portion 32 of the metal plate member 30 is obliquely arranged along the flow of exhaust gas as viewed from above as shown in FIG. Then, as indicated by the arrow, the exhaust gas proceeds so as to sew between the main body portions 32A of the plurality of metal plate-like members 30A, and the ratio of the exhaust gas touching the surface of the main body portion 32A of the metal plate-like member 30A is higher. Become more. As a result, the exhaust gas can easily touch the metal catalyst, and a predetermined substance can be easily removed from the exhaust gas.

  In each of the above-described embodiments, the metal plate-like member is composed of a metal wire-made wire mesh carrying a metal catalyst, a metal flat member carrying a metal catalyst, and a metal catalyst. However, the present invention is not limited to this, and is not limited to this, but is a metal member formed in a plate shape that touches the metal catalyst a lot when exhaust gas passes through it. If so, an appropriate metal plate-like member can be used. As an example, a member in which a plurality of pressing portions are formed on a metal flat plate member may be used.

  In each of the embodiments described above, the exhaust device for a motorcycle is applied with the catalyzer of the present invention. However, the present invention is not limited to this, and the exhaust device for a vehicle other than a motorcycle (for example, a four-wheel vehicle) is used. The present invention may be applied, or may be applied to an exhaust device for an engine used in a device other than a vehicle.

1 Exhaust device
10,110,210 Catalyzer (exhaust gas purifier)
20,120,220 Metal frame member
21,121,221 inside
22,122,222 First opening (opening)
23,123 Second opening (opening)
24,124 holder
30,130,230,230A ~ 230E Metal plate member
31,131,241,251 Plate surface
32 Main unit
33 Mounting part
240 corrugated metal
240A corrugated metal without holes
240B corrugated metal with hole
250 metal plate
250A holeless metal flat plate
250B metal plate with holes
A Direction connecting both openings

Claims (6)

An exhaust gas purification device that removes a predetermined substance contained in the exhaust gas by a metal catalyst by passing the exhaust gas through the inside,
A metal frame member having a cylindrical shape;
A plurality of metal plate-like members loaded with a metal catalyst, arranged in the metal frame member and held side by side along a direction in which the plate surfaces connect both openings of the metal frame member;
An exhaust gas purification device comprising:   A holding portion for holding the metal plate member is formed on an inner surface of the metal frame member along a direction connecting the openings of both the metal frame members, and the metal plate shape is formed on the holding portion. The exhaust gas purification apparatus according to claim 1, wherein a member is held.   The exhaust gas purification apparatus according to claim 1 or 2, wherein the metal frame member has a rectangular tube shape.   The exhaust gas purification apparatus according to any one of claims 1 to 3, wherein the metal plate-like member is formed of a metal wire-made wire mesh carrying a metal catalyst.   5. The metal plate-like member is configured by overlapping a metal flat member carrying a metal catalyst and a metal corrugated member carrying a metal catalyst. The exhaust gas purifying apparatus according to 1.   The exhaust gas purifying device according to any one of claims 1 to 5, wherein the metal plate member is configured to be attached to and detached from the metal frame member.

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