JP2017190774A - Catalytic converter unit and exhaust gas catalytic converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new type catalytic converter unit for an exhaust gas catalytic converter and the exhaust gas catalytic converter including the unit.SOLUTION: A catalytic converter unit 10 for an exhaust gas catalytic converter having catalytic converter modules 11 is provided. Each of the module 11 includes a catalyst body 13 and a metallic housing 12 and is fixed to a support structure 14. The support structure 14 includes a plate-like base body 15 having opening portions 16 and projecting portions 17 for the modules 11. Each of the projecting portions 17 forms a first fixation flange 18 projecting outwards. Each of the metallic housing 12 includes a collar 19 projecting outwards. The collar 19 comes into contact with the fixation flange 18. Each of the module 11 is fixed to the first fixation flange 18 via a second fixation flange 21 of the collar 19 or a separate second fixation flange 21a and via removable fixation means.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a catalytic converter unit based on the preamble of claim 1. The invention further relates to an exhaust gas catalytic converter.

  A catalytic converter unit for an exhaust gas catalytic converter includes a plurality of catalytic converter modules. Each catalytic converter module includes a ceramic catalyst body through which exhaust gas flows and a metal housing for the ceramic catalyst body, which is also referred to as canning. The housing of each catalytic converter module receives the respective catalyst body and surrounds the catalyst body in a particular section, i.e. excluding the flow end of the catalyst body. Of the ends of each catalyst body, one flow end provides an inflow end and the other flow end provides an outflow end.

  In the case of conventionally known catalytic converter units, the catalytic converter modules are arranged in an array on the support structure in a form with a plurality of lines and gaps, and within the region of their metal housing The modules are firmly connected to the support structure and / or are connected to each other, in particular by welding. These welded connections must be separated, for example, by grinding stones, especially if it is necessary to replace the catalytic converter module in the catalytic converter unit, resulting in damage to the support structure and / or the adjacent catalytic converter module. There was something to be done. Furthermore, connecting adjacent catalytic converter modules by welding is practically available only when the housing has a rectangular cross section. Therefore, there is a need for a catalytic converter unit for a catalytic converter that allows the catalytic converter module to be easily replaced regardless of the shape of its housing. Starting from this, the present invention is based on the object of providing a new type of catalytic converter unit for an exhaust gas catalytic converter and an exhaust gas catalytic converter having such a catalytic converter unit.

  This object is achieved by a catalytic converter unit according to claim 1 of the present application.

  According to the present invention, the support structure that functions to receive the catalytic converter module includes a plurality of openings for receiving each of the individual catalytic converter modules, and a protruding portion that protrudes with respect to the plate-like substrate. And the projecting portion surrounds the opening in a frame shape, and the projecting portion has a first fixing flange projecting outward with respect to the opening on the side opposite to the plate-like base. Form. The metal housing of the catalytic converter module is provided with a collar at one end, which protrudes outwardly with respect to the housing, and particularly surrounds this opening when the catalytic converter module is inserted into the opening of the support structure. Adjacent to the first fixed flange. Each catalytic converter module has at least one removal that interacts with and through the second fixed flange provided by the metal housing collar of the individual catalytic converter module or through the second separate fixed flange. Via a possible fixing means, it is fixed to the first fixing flange of the protrusion surrounding the opening for receiving the individual catalytic converter module.

  The present invention proposes significant advantages with respect to securing the catalytic converter module to the support structure of the catalytic converter unit. The protrusion of the support structure that surrounds the opening of the support structure in a frame shape forms a first fixing flange. The catalytic converter module housings inserted into the openings contact these first fixed flanges by the collars of the individual housings.

  A second fixing flange provided separately by this collar or a separate second fixing flange interacts with the first fixing flange of the projections surrounding the individual openings in a frame-like manner, ie with the fixing flange. It functions to removably fix the catalytic converter module to the support structure via the fixing means. By providing a high packing density, a plurality of catalytic converter modules can be attached to the support structure of the catalytic converter unit for easy replacement.

  According to an advantageous further development, each catalytic converter module is fixed to an individual first fixing flange via a second fixing flange and via a screw connection extending through the fixing flange. Is done. Connecting the catalytic converter module to the support structure via a screw connection that interacts with the fixed flange is simple and therefore preferred.

  According to a further advantageous development, the first fixing flange and the second fixing flange comprise outwardly projecting segments for receiving and guiding the screw connection, and these segments are An insertion slot is provided on the side, through which an individual screw connection consisting of a screw and a nut pre-assembled on the screw can be inserted laterally into the segment of the fixed flange. This method makes it possible to particularly advantageously fix the catalytic converter module to the support structure of the catalytic converter unit. A screw with a pre-assembled nut can be inserted laterally into the insertion slot of the segment of the fixed flange. By this method, the catalytic converter module can be easily and firmly fixed to the support structure even in a narrow space. In particular, it is not necessary to separately fasten the loose nuts to the screws in the region between adjacent protrusions of the support structure that are difficult to access.

  Preferentially, a holder for the nut is formed on the projecting portion surrounding the opening in a frame shape, and the nut allows the nut to connect the screw connection portion consisting of a screw and a pre-assembled nut to the segment. During or after insertion into the insertion slot, the holder is brought into engagement and the holder secures the nut when the screw connection is tightened. This has the advantage that when tightening the screw connection, there is no need to access the difficult-to-access nut. The nuts of the individual screw connections are automatically fixed to the holder so that the screw connections can be easily tightened.

  An exhaust gas catalytic converter according to the invention is defined in claim 10.

  Preferred further developments of the invention result from the dependent claims as well as the following description. Exemplary embodiments of the present invention will be described in more detail with reference to the drawings, but are not limited thereto.

1 is an exploded perspective view of a first catalytic converter unit for an exhaust gas catalytic converter according to the present invention. FIG. FIG. 2 is a detailed view of the catalytic converter unit of FIG. 1. FIG. 3 is a diagram showing an alternative example of the details of FIG. 2. FIG. 4 shows a further alternative of the details of FIGS. 2 and 3. It is a disassembled perspective view of the 2nd catalytic converter unit for the exhaust gas catalytic converter by this invention. FIG. 6 is a detailed view of the catalytic converter unit of FIG. 5. FIG. 7 is a diagram showing an alternative example of the details of FIG. 6.

  The present invention relates to a catalytic converter unit and an exhaust gas catalytic converter for an exhaust gas catalytic converter of an internal combustion engine.

  Preferentially, the present invention is used in internal combustion engines for marine or maritime applications. In particular, the catalytic converter unit according to the invention is designed as an SCR catalytic converter unit for an SCR exhaust gas catalytic converter of a marine diesel engine.

  The catalytic converter unit 10 according to the present invention includes a plurality of catalytic converter modules 11. Each catalytic converter module 11 includes a metal housing 12 that houses a ceramic catalyst body 13. The metal housing 12 and the ceramic catalytic converter body 13 have a rectangular cross section in FIGS. 1 to 4 and a circular cross section in FIGS. 5 to 7. These housings 12 enclose individual ceramic catalyst bodies 13 in specific areas outside. The housing 12, also called canning, makes the ceramic catalyst body 13 visible at both ends forming the inflow end and the outflow end of each catalytic converter module 11.

  Furthermore, the catalytic converter unit 10 includes a metal support structure 14 for a plurality of catalytic converter modules 11, and the catalytic converter module 11 is fixed to the support structure 14 via the metal housing 12.

  The support structure 14 includes a plate-like base body 15 having a plurality of openings 16, and each opening 16 functions to receive the catalytic converter module 11. Further, the support structure 14 includes a frame-like protrusion 17 that functions to receive the catalytic converter module 11 each time. The protrusion 17 protrudes from the plate-shaped base 15 toward the catalytic converter module 11 at least on one side, and preferentially on both sides. These protrusions 17 reinforce the base 15 of the support structure 14.

  Each protruding portion 17 is a frame-shaped first fixing flange 18 that surrounds one of the plurality of openings 16 and protrudes outward with respect to the opening 16 on the side away from the plate-like base body 15. Form. Therefore, when each protrusion 17 surrounds one of the clearances 16 of the plate-like base 15 of the support structure 14 in a frame shape, the protrusion 17 is separated from the base 15 on the end protruding from the base 15. A first fixing flange 18 is provided at the end. The first fixing flange 18 surrounds the individual clearances 16 in a frame shape on the side away from the base body 15. Each first fixing flange 18 is preferentially an integral part of the individual projection 17.

  The metal housing 12 of the catalytic converter module 11 includes a collar 19 that protrudes outward with respect to the housing 12 at its end. Such a collar 19 is preferentially an integral part of the housing 12 of the catalytic converter module 11 and can be easily manufactured by flanging.

  In particular, when the catalytic converter module 11 is inserted into the clearance 16 of the support structure 14, the collar 19 that protrudes outwardly with respect to the housing 12 of the catalytic converter module 11 has individual protrusions 17 that surround the opening 16. It is carried on the first fixed flange 18. In particular, when the catalytic converter module 11 having the collar 19 contacts the protruding portion 17, the protruding portion 17 supports the weight of the catalytic converter module 11 and applies the force to the base body 15.

  Here, in order to seal the gap between the first fixing flange 18 and the collar 19, the individual first fixing flanges 18 of the individual protrusions 17 of the support structure 14 and the housings 12 of the individual catalytic converter modules 11. A sealing element 20 is preferentially arranged between the collar 19.

  Each catalytic converter module 11 uses a second fixing flange 21 (see FIG. 2) integrally provided by the collar 19 of the metal housing 12 of the individual catalytic converter module 11, or a second separate fixing. It is fixed to the first fixed flange 18 of the protrusion 17 surrounding the opening 16 for receiving each catalytic converter module 11 via the flange 21a (see FIG. 3).

  Since the separate second fixing flange 21a can be reused and the housing 12 of the catalytic converter module 11 can be easily manufactured, the separate second fixing flange 21a is preferably based on FIG. In addition, removable fixing means that interact with each of the fixing flanges 18, 21 and the fixing flanges 18, 21 a serve to fix the catalytic converter module 11 to the support structure 14.

  The fixing means that serves to detachably fix the catalytic converter module 11 is preferentially realized as a screw connection 22. Each of these screw connection portions 22 includes a screw 22a and a nut 22b that interacts with the screw 22a. The screw connection 22, ie the screw 22 a of this screw connection 22, is in this case individually connected to the support structure 14 via the respective first fixing flanges 18 and the respective second fixing flanges 21 and 21 a. Extending into the area of the catalytic converter module 11.

  The first fixing flange 18 and the second fixing flange 21, 21 a respectively include segments 23 and 24 protruding outward, that is, the segment 23 corresponding to the first fixing flange 18, the second fixing flange 21, And a segment 24 corresponding to 21a. In any case, the segments 23 and 24 serve to receive and guide the screw connection 22, ie the screw 22 a of the screw connection 22, and in this regard a passage for guiding the screw 22 a of the screw connection 22. An opening is provided. Each screw connection 22 interacts with two segments: a segment 23 of the first fixing flange 18 and a segment 24 of the second fixing flange 21 or 21a.

  Each screw connection 22 passes through the passage openings of the respective segments 23, 24 of the fixing flanges 18, 21, 21a, i.e. in the insertion direction of the individual catalytic converter modules 11 in the respective openings 16 of the support structure 14. Extend in parallel directions.

  The segments 23 and 24 of the fixed flange 18 or 21 and 21a projecting outward face the side away from the opening 16, and are thus arranged in the opening 16 and adjacent to each other in the support structure 14 It faces the side away from the catalytic converter module 23 which is positioned in the area between the adjacent individual openings 16.

  As is apparent from FIGS. 2 and 3, each of these segments 23, 24 projects outwardly of an individual fixing flange 18, 21, 21a which serves to receive and guide the screw connection 22 each time. It is formed to open on the side where the insertion slots 25 and 26 are formed. That is, the segments 23 and 24 are connected to the fixing flanges 18 or 21 through the insertion slots 25 and 26 of the segments 23 and 24, with the screw connection portions 22 including the screws 22a and the nuts 22b assembled in advance to the screws 22 being fixed. , 21a is formed in such a manner that it can be inserted laterally into the segment 23 or 24, ie into the passage opening of the segment for the screw 22a.

  Rather, in order to fix the loose nuts 22b to the individual screws 22a, the loose nuts 22b are inserted through the passage openings of the segments 23, 24 of the fixing flanges 18, 21, 21a and then assembled in advance. In order to insert the connecting part 22 through the screw slots 25, 26 into the segments 23, 24 of the fixing flanges 18, 21, 21a, that is, into the passage openings of the segments 23, 24, the nut 22 is inserted into the screw 22a. It is not necessary to be able to assemble in advance.

  As best understood from FIGS. 2 and 3, these insertion slots 25 and 26 are formed on the side of the segments 23 and 24 facing away from the catalytic converter module 11. Thereby, the screw connection part 22 consisting of the screw 22a and the pre-assembled nut 22b is individually connected to the segments 23 and 24 of the fixing flanges 18, 21, and 21a via the insertion slots 25 and 25 of the segments 23 and 24. Can be inserted in a direction perpendicular to a corresponding portion of the protrusion 17 surrounding the opening 16 of the first portion.

  Insertion of the screw connection 22 into the insertion slot 25, 26 of the segment 23, 24 is in the direction perpendicular to the insertion direction of the individual catalytic converter module 11 into the individual opening 16 of the support structure 14, and thus screw connection. It is carried out in a direction perpendicular to the direction of extension of the passage openings of the individual segments 23, 24 for the part 22.

  Preferentially, the holder 27 for the nut 22b of the screw connection 22 assembled in advance through the insertion slots 25, 26 opens the opening of the plate-like base body 15 of the support structure 14 in a frame shape. It is formed in the surrounding protrusion 17.

  The nut 22b of the screw connection portion 22 is inserted into the passage openings of the segments 23 and 24 via the insertion slots 25 of the segments 23 and 24, and then the nut 22b is inserted into the holder 27 by inserting the screw connection portion 22 including the screw 22a and the nut 22b. These holders 27 are supported in such a manner that the rotation shaft with respect to the nut 22b is not necessary during the subsequent fastening of the screw connection portion 22. Thus, the nuts 22b of the individual screw connection portions 22 are fixed to the corresponding holders in a non-rotatable manner. Therefore, by tightening the screws 22a of the respective screw connection portions 22, the screw connection portions 22 can be easily connected. Can be tightened.

  As described above, it is not only easy to fix the catalytic converter module 11 to the support structure 14, but also the nut 22 b removed from the holder 27 when removing the screw connection portion 22 is provided with an exhaust gas turbocharger or a catalytic converter. An advantage is that the nut 22 is captured by the plate-like base body 15 of the support structure 14 even if the nut 22 can be dropped, while preventing it from falling freely toward the direction of the engine of the internal combustion engine including the unit. In this way, damage to the exhaust turbocharger and the engine can be prevented. A further advantage of securing the catalytic converter module 11 to the support structure 14 as described above is that the screw connection 22 can be easily accessed from the side. When blocking the screw connection 22, the screw connection 22 may serve to remove the blocked screw connection 22 without risking damage to the catalytic converter module 11 in the area of the screw 22 a.

  In order to be able to realize the packing density of the catalytic converter module 11 as high as possible, the distance between the adjacent openings 16 for the catalytic converter module 11 is chosen to be minimal and the corresponding fixing flanges 18, 21, 21a. And the collar 19 are likewise implemented with a minimal outward facing outward from the receiving opening 16 so that an adequate sealing surface for the seal 20 is ensured.

  The segments 23, 24 which serve to receive and guide the screw connection 22 are offset from each other in the catalytic converter module 11 directly adjacent to each other or in the receiving opening 16 for the catalytic converter module 11 directly adjacent to each other. Such segments 23, 24 are not arranged to face each other directly and therefore require minimal installation space. This is also advantageous when inserting the preassembled screw connection 22 into the insertion slots 25, 26 of the segments 23 and 24, since the insertion slot is easily accessible.

  FIG. 4 shows an arrangement according to the invention in which a so-called V-clamp or clamp 28 interacting with the fixing flange 18 or 21, 21 a is used to fix the catalytic converter module 11 on the support structure 14. By using such a V clamp, the assembly of the catalytic converter module 11 to the support structure 14 and the disassembly of the catalytic converter module 11 from the support structure 14 can be simplified as well. The geometric profile of the V clamp 28 in this case is adapted to the geometric profile of the flanges 18, 21 and 21a.

  In the exemplary embodiment illustrated in FIGS. 1-4, the catalytic converter module 11 has a contour that is rectangular in cross section due to a rectangular housing 12, and the housing 12 has a rectangular contour. The clearance 16 is accommodated, and the clearance 16 is surrounded by a protrusion having a frame-like and rectangular outline. Compared to this embodiment, FIGS. 5, 6 and 7 show that a catalytic converter module 11 having a circular cross section has a housing 12 having a circular cross section and a catalytic converter body 13 having a circular cross section. 2 illustrates an exemplary embodiment of the present invention. The receiving opening 16 in the plate-like substrate 15 of the support structure 14 is surrounded by a frame-like protrusion 17 having a circular cross section and a circular cross section. Note that for all remaining details, the exemplary embodiment of FIGS. 5 and 6 corresponds to the exemplary embodiment of FIGS. 1 and 2, and the exemplary embodiment of FIG. This corresponds to the embodiment. The same reference numbers are used for the same parts to avoid unnecessary repetition.

  In an exemplary embodiment having a catalytic converter module 11 with a circular cross section and an opening 16 with a circular cross section, a V clamp may be used to secure the catalytic converter module 11.

  In order to reduce the weight of the support structure 14 without adversely affecting the rigidity of the entire structure, it is possible to combine the fixing flanges 21a of the plurality of catalytic converter modules 11. For these reasons, a reinforced grid structure can be obtained by combining a plurality of flanges 21a, so that the thickness of the base plate 15 can be reduced.

DESCRIPTION OF SYMBOLS 10 Catalytic converter unit 11 Catalytic converter module 12 Housing 13 Catalyst main body 14 Support structure 15 Base | substrate 16 Opening part 17 Protrusion part 18 Fixing flange 19 Collar 20 Seal 21 Fixing flange 21a Fixing flange 22 Screw connection part 22a Screw 22b Nut 23 Segment 24 Segment 25 Insert slot 26 Insert slot 27 Holder 28 V clamp

Claims (11)

A catalytic converter unit (10) for an exhaust gas catalytic converter comprising a plurality of catalytic converter modules (11),
Each catalytic converter module (11) includes a ceramic catalyst body (13) through which exhaust gas flows and a metal housing (12) for the catalyst body (13). ) Are received within the individual metal housings (12) and are surrounded by the metal housings (12) in particular sections;
The catalytic converter unit (10) includes a support structure (14) for the plurality of catalytic converter modules (11), and the catalytic converter module (11) is interposed via the metal housing (12). Fixed to the support structure (14);
The support structure (14) has a plurality of openings (16) for receiving each catalytic converter module (11), and protrudes from the openings (16) and has a frame shape in the openings (16). A plate-like substrate (15) having a protrusion (17) surrounding the
On the side away from the plate-like base body (15), the protrusions (17) each form a first fixing flange (18) protruding outward with respect to the opening (16). ,
The metal housing (12) of the catalytic converter module (11) has, at one end, a collar (19) protruding outward with respect to the housing (12), and the collar (19) In particular, when the catalytic converter unit (11) is inserted into the opening (16) of the support structure (14), the first fixing flange (17) of the protrusion (17) surrounding the opening (16) (see FIG. 18) contacted,
Each catalytic converter module (11) is connected via a second fixed flange (21) provided by the collar (19) of the metal housing (12) of the individual catalytic converter module (11) or separately. The openings (16) for receiving the individual catalytic converter modules (11) via two fixing flanges (21a) and via at least one removable fixing means interacting with the fixing flanges. A catalytic converter unit, wherein the catalytic converter unit is fixed to the first fixing flange (18) of the surrounding projecting portion (17).   Each catalytic converter module (11) is connected via a screw connection (22) extending through the second fixing flange (21, 21a) and through the fixing flange (18, 21, 21a). Catalytic converter unit according to claim 1, characterized in that it is fixed to each said first fixing flange (18). The first fixing flange (18) and the second fixing flange (21, 21a) are outwardly projecting segments (23, 24) for receiving and guiding the screw connection (22). )
These segments (23, 24) on one side have insertion slots (25, 26)
Through the insertion slot (25, 26), each screw connection portion (22) including a screw (22a) and a nut (22b) pre-assembled to the screw (22a) is connected to the fixing flange (18). The catalytic converter unit according to claim 2, characterized in that it can be inserted laterally in the segments (23, 24) of.   The catalytic converter according to claim 3, wherein the insertion slot (25, 26) is formed on a side of the segment (23, 24) facing away from the catalytic converter module (11). unit. A holder (27) for the nut (22b) is formed on the protrusion (17) surrounding the opening (16) in a frame shape,
By means of the holder (27), the nut (22b) is made up of a screw (22a) and a pre-assembled nut (22b) in the insertion slot (25, 26) of the segment (23, 24). It is brought into an engaged state during or after inserting (22), and the holder (27) fixes the nut (22b) when tightening the screw connection (22). The catalytic converter unit according to any one of claims 2 to 4.   4. In the region of the catalytic converter module (11) directly adjacent to each other, the segments (23, 24) of the fixed flange (18, 21, 21a) are offset with respect to each other. The catalytic converter unit according to claim 5.   Each catalytic converter module (11) is connected via the second fixed flange (21, 21a) and via a V clamp (28) or clamp that interacts with the fixed flange (18, 21, 21a). The catalytic converter unit according to any one of claims 1 to 4, wherein the catalytic converter unit is fixed to each of the first fixing flanges (18). The catalytic converter module (11) includes a catalytic converter body (13) having a circular cross section and a metal housing (12) having a circular cross section,
The catalytic converter unit according to any one of claims 1 to 7, wherein the opening (16) and the protrusion (17) of the support structure (14) have a circular cross section. . The catalytic converter module (11) includes a catalytic converter body (13) having a corner in a cross section and a metal housing (12) having a corner in a cross section,
The catalytic converter unit according to any one of claims 1 to 7, wherein the opening (16) and the protrusion (17) of the support structure (14) have corners in cross section. .   The catalytic converter unit according to any one of claims 1 to 9, wherein the fixed flanges (21a) of a plurality of catalytic converter modules are combined.   An exhaust gas catalytic converter comprising a plurality of catalytic converter units (10) according to any one of the preceding claims.