JP6794306B2 - Catalytic converter unit and exhaust gas catalytic converter - Google Patents

Description

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

The catalytic converter unit for the exhaust gas catalytic converter includes a plurality of catalytic converter modules. Each catalyst converter module includes a ceramic catalyst body through which exhaust gas flows and a metal housing for the ceramic catalyst body, and the housing is also referred to as canning. The housing of each catalyst converter module receives each catalyst body and surrounds the catalyst body in a particular section, 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 the 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 the catalytic converter is arranged within the region of their metal housing. The modules are tightly connected to the support structure and / or are interconnected, especially by welding. These welded connections must be separated, for example by grinding, if the catalytic converter module needs to be replaced, especially in the catalytic converter unit, resulting in damage to the support structure and / or adjacent catalytic converter modules. It was sometimes done. Moreover, connecting adjacent catalytic converter modules by welding is only practically available if 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. With this as a starting point, 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 the 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 has a plurality of openings for receiving each of the individual catalytic converter modules and a protrusion that protrudes from the plate-shaped substrate. The protrusion surrounds the opening in a frame shape, and the protrusion has a first fixed flange that projects outward with respect to the opening on the side opposite to the plate-shaped substrate. Form. The metal housing of the catalytic converter module has a collar at one end that projects outward with respect to the housing and surrounds the opening, especially when the catalytic converter module is inserted into an opening in the support structure. Adjacent to the first fixing flange. Each catalytic converter module has at least one removal that interacts with the fixed flange through a second fixed flange provided by the collar of the metal housing of the individual catalytic converter module or through a second separate fixed flange. It is fixed to the first fixing flange of the protrusion surrounding the opening that receives the individual catalytic converter modules via possible fixing means.

The present invention proposes a great advantage in fixing the catalytic converter module to the support structure of the catalytic converter unit. The protruding portion of the support structure that surrounds the opening of the support structure in a frame shape forms a first fixed flange. The housings of the catalytic converter modules inserted into the openings are in contact with these first fixing flanges by the collars of the individual housings.

A second fixed flange or a separate second fixed flange integrally provided by this collar interacts with, or with, the fixed flange a first fixed flange of a protrusion that frame-likes the individual openings. It functions to detachably secure the catalytic converter module to the support structure via a 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 so that they can be easily replaced.

According to an advantageous further deployment example, each catalytic converter module is secured to an individual first fixed flange via a second fixed flange and through a threaded connection extending through the fixed flange. Will be done. Connecting the catalytic converter module to the support structure via a threaded connection that interacts with the fixed flange is simple and therefore preferred.

According to another more advantageous deployment example, the first fixing flange and the second fixing flange include segments that project outward to receive and guide the threaded connection, and these segments are one. An insertion slot is provided on the side, through which individual screw connections consisting of a screw and a nut pre-assembled to the screw can be laterally inserted into a segment of the fixed flange. By this method, the catalytic converter module can be fixed to the support structure of the catalytic converter unit particularly advantageously. Screws with pre-assembled nuts can be inserted laterally into the insertion slots of the fixed flange segments. By this method, the catalytic converter module can be easily and firmly fixed to the support structure even in a narrow space. In particular, there is no need to separately secure loose nuts to the screws in the area between adjacent protrusions of the support structure, which is difficult to access.

Preferentially, a holder for the nut is formed in a frame-like protrusion surrounding the opening, which allows the nut to segment a screw connection consisting of a screw and a pre-assembled nut. Brought into engagement during or after insertion into the insertion slot, and the holder secures the nut when the threaded connection is tightened. This has the advantage that when tightening the threaded connection, it is not necessary to access the nut, which is difficult to access. The nuts on the individual thread connections are automatically secured to the holder for easy tightening of the thread connections.

The exhaust gas catalytic converter according to the present invention is defined in claim 10 of the claims.

A preferred further development of the present invention is obtained from the dependent claims described in the claims and the following description. An exemplary embodiment of the invention will be described in more detail with reference to the drawings, but is not limited thereto.

It is an exploded perspective view of the 1st catalyst converter unit for the exhaust gas catalyst converter according to this invention. It is a detailed view of the catalytic converter unit of FIG. It is a figure which shows the alternative example of the detail of FIG. It is a figure which shows the further alternative example of the detail of FIG. 2 and FIG. It is an exploded perspective view of the 2nd catalyst converter unit for the exhaust gas catalyst converter according to this invention. It is a detailed view of the catalytic converter unit of FIG. It is a figure which shows the alternative example of the details of FIG.

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

Preferentially, the present invention is used in internal combustion engines for marine or maritime applications. In particular, the catalytic converter unit according to the present invention is designed as an SCR catalytic converter unit for the 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 catalyst converter module 11 includes a metal housing 12 that houses the ceramic catalyst body 13. The metal housing 12 and the ceramic catalyst converter main 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 surround the individual ceramic catalyst bodies 13 with specific regions on the outside thereof. The housing 12, also referred to as canning, makes the ceramic catalyst body 13 visible at both ends forming the inflow and outflow ends of the respective catalyst converter modules 11.

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

Each protrusion 17 surrounds one of the plurality of openings 16 in a frame shape on the side away from the plate-shaped substrate 15, and the first fixed flange 18 projects outward with respect to the openings 16. To form. Therefore, when each protrusion 17 surrounds one of the clearances 16 of the plate-shaped 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 frames the individual clearances 16 on the side away from the substrate 15. Each first fixed flange 18 is preferentially an integral part of the individual protrusions 17.

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

In particular, when the catalytic converter module 11 is inserted into the clearance 16 of the support structure 14, the collar 19 projecting outward with respect to the housing 12 of the catalytic converter module 11 is an individual of the projecting portions 17 surrounding the opening 16. It is supported on the first fixing flange 18. In particular, when the catalytic converter module 11 having the collar 19 comes into contact with the protrusion 17, the protrusion 17 supports the weight of the catalytic converter module 11 and exerts its force on the substrate 15.

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

Each catalytic converter module 11 is fixed using 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 by a second separate body. Through the flange 21a (see FIG. 3), it is fixed to the first fixing flange 18 of the protrusion 17 surrounding the opening 16 that receives each catalytic converter module 11.

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

The fixing means useful for the removable fixing of the catalytic converter module 11 is preferentially realized as the screw connection portion 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 portion 22, that is, the screw 22a of the screw connection portion 22, in this case, is individually fixed to the support structure 14 via the individual first fixing flange 18 and the individual second fixing flanges 21 and 21a. Extends within the region of the catalytic converter module 11.

The first fixed flange 18 and the second fixed flanges 21 and 21a include segments 23 and 24 projecting outward, respectively, that is, the segment 23 corresponding to the first fixed flange 18 and the second fixed flange 21, It includes a segment 24 corresponding to 21a. In each case, the segments 23 and 24 serve to receive and guide the screw connection portion 22, that is, the screw 22a of the screw connection portion 22, and in this regard, a passage for guiding the screw 22a of the screw connection portion 22. It has an opening. Each threaded connection 22 interacts with two segments, the segment 23 of the first fixed flange 18 and the segment 24 of the second fixed flange 21 or 21a.

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

The fixed flanges 18 or the segments 23 and 24 of the fixed flanges 18 or 21 and 21a projecting outward face the side away from the opening 16, and are arranged in the opening 16 and adjacent projecting portions 17 of the support structure 14 to each other. Facing away from the catalytic converter module 23, which is located in the region between the adjacent individual openings 16 between the two.

As is apparent from FIGS. 2 and 3, each of these segments 23, 24 projects outward of the individual fixing flanges 18, 21, 21a, which serve to receive and guide the threaded connection 22 each time. , Is formed so as to open on the side where the insertion slots 25 and 26 are formed. That is, these segments 23 and 24 fix the screw connecting portion 22 including the screw 22a and the nut 22b pre-assembled to the screw 22 through the insertion slots 25 and 26 of the segments 23 and 24 with the flange 18 or 21. , 21a are formed in such a manner that they can be inserted laterally into the segment 23 or 24, i.e., inserted into the passage opening of the segment for the screw 22a.

Rather, the loosened nuts 22b are inserted through the passage openings in the segments 23, 24 of the fixing flanges 18, 21, 21a to secure the loosened nuts 22b to the individual screws 22a, and then the pre-assembled screws. A nut 22 is screwed into the screw 22a to allow the connection 22 to be laterally inserted into the segments 23, 24 of the fixing flanges 18, 21, 21a, i.e., into the passage openings of the segments 23, 24 via the screw slots 25, 26. 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 sides of segments 23 and 24 facing away from the catalytic converter module 11. As a result, the screw connection portion 22 composed of the screw 22a and the pre-assembled nut 22b is individually formed in 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. It can be inserted in a direction perpendicular to the corresponding portion of the protrusion 17 surrounding the opening 16.

The insertion of the screw connection portion 22 into the insertion slots 25 and 26 of the segments 23 and 24 is performed in a direction orthogonal to the insertion direction of the individual catalytic converter modules 11 into the individual openings 16 of the support structure 14, and thus the screw connection. It is carried out in a direction orthogonal to the extending direction of the passage opening of the individual segments 23, 24 for the portion 22.

Preferentially, the holder 27 for the nut 22b of the pre-assembled screw connection 22 inserted through the insertion slots 25, 26 opens the opening of the plate-shaped substrate 15 of the support structure 14 in a frame shape. It is formed on a protruding portion 17 that surrounds it.

The nut 22b of the screw connecting portion 22 is formed by inserting the screw connecting portion 22 composed of the screw 22a and the nut 22b into the passage opening of the segments 23 and 24 via the insertion slot 25 of the segments 23 and 24, and then the nut 22b holds the holder 27. These holders 27 are supported in such a manner that they are fixed in a non-rotatable manner and the rotating shaft with respect to the nut 22b is not required during the subsequent fastening of the screw connecting portion 22. In this way, the nuts 22b of the individual screw connection portions 22 are fixed to the corresponding holders in a non-rotatable manner, so that each screw connection portion 22 can be easily tightened by tightening the screws 22a of each screw connection portion 22. Can be tightened.

Not only is it easy to fix the catalytic converter module 11 to the support structure 14 as described above, but also the nut 22b removed from the holder 27 when removing the screw connection 22 is an exhaust gas turbocharger or catalytic converter. It has the advantage that the nut 22 is captured by the plate-shaped substrate 15 of the support structure 14 even if it can be dropped while preventing it from freely falling toward the engine of the internal combustion engine including the unit. In this way, damage to the exhaust turbocharger and the engine can be prevented. As a further advantage of fixing the catalytic converter module 11 to the support structure 14 as described above, the screw connection portion 22 can be easily accessed from the side. When blocking the threaded connection 22, the threaded connection 22 can help remove the blocked threaded connection 22 in the region of the thread 22a without the risk of damaging the catalytic converter module 11.

In order to achieve the highest possible packing density of the catalytic converter module 11, the distance between adjacent openings 16 for the catalytic converter module 11 is chosen to be minimal and the corresponding fixed flanges 18,21,21a And the collar 19 are similarly implemented so that the outward facing spread from the receiving opening 16 is minimized to ensure a suitable sealing surface for the seal 20.

The segments 23, 24 that function to receive and guide the threaded connection 22 are offset from each other in the catalytic converter module 11 that is directly adjacent to each other or in the receiving opening 16 for the catalytic converter module 11 that is directly adjacent to each other. , Such segments 23, 24 are not arranged so as to face each other directly and therefore require minimal installation space. This is also an advantage when inserting the pre-assembled threaded connections 22 into the insertion slots 25, 26 of the segments 23 and 24, as the insertion slots are easily accessible.

FIG. 4 shows the configuration of the present invention in which a so-called V-clamp or clamp 28 that interacts with a fixing flange 18 or 21,21a is used to secure the catalytic converter module 11 onto 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 similarly simplified. The geometric contour of the V-clamp 28 in this case is adapted to the geometric contour of the flanges 18, 21 and 21a.

In the exemplary embodiment illustrated in FIGS. 1 to 4, the catalytic converter module 11 has a contour whose cross section is rectangular due to the rectangular housing 12, and the housing 12 has a rectangular contour. Housed in clearance 16, clearance 16 is surrounded by a frame-like, rectangular contoured protrusion. In comparison with this embodiment, FIGS. 5, 6 and 7 show that the 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. An exemplary embodiment of the present invention is shown. The receiving opening 16 in the plate-shaped substrate 15 of the support structure 14 is surrounded by a frame-shaped protrusion 17 having a circular cross section and a circular cross section. Note that for all remaining details, the exemplary embodiments of FIGS. 5 and 6 correspond to the exemplary embodiments of FIGS. 1 and 2, and the exemplary embodiments of FIG. 7 are of FIG. Corresponds to the embodiment. The same reference numbers are used for the same parts to avoid unnecessary repetition.

Also in an exemplary embodiment having a catalytic converter module 11 having a circular cross section and an opening 16 having a circular cross section, a V-clamp can 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 fixed flanges 21a of the plurality of catalytic converter modules 11. For this reason, the reinforced lattice structure can be obtained by combining the plurality of flanges 21a, so that the thickness of the foundation plate 15 can be reduced.

10 Catalytic converter unit 11 Catalytic converter module 12 Housing 13 Catalytic body 14 Support structure 15 Base 16 Opening 17 Protruding part 18 Fixed flange 19 Color 20 Seal 21 Fixed flange 21a Fixed flange 22 Screw connection 22a Screw 22b Nut 23 Segment 24 Segment 25 Insertion slot 26 Insertion 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 catalyst converter module (11) includes a ceramic catalyst body (13) through which exhaust gas flows, and a metal housing (12) for the catalyst body (13), and each catalyst body (13) is provided. ) Are received within the individual metal housing (12) and are surrounded by the metal housing (12) in a particular section.
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 a metal housing (12) thereof. It is fixed to the support structure (14) and
The support structure (14) has a plurality of openings (16) for receiving each catalytic converter module (11), and the openings (16) projecting from the openings (16) and forming a frame shape. ), And a plate-shaped substrate (15) having a protrusion (17).
On the side away from the plate-shaped substrate (15), each of the projecting portions (17) forms a first fixing flange (18) projecting outward with respect to the opening (16). ,
The metal housing (12) of the catalytic converter module (11) has a collar (19) at one end that projects outward with respect to the housing (12). 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) Contacted against 18)
Each catalytic converter module (11) has a second fixed flange (21) provided by the collar (19) of the metal housing (12) of the individual catalytic converter module (11) or a separate first. The opening (16) that receives the individual catalytic converter module (11) via the fixing flange (21a) of 2 and via at least one removable fixing means that interacts with the fixing flange. A catalytic converter unit characterized in that it is fixed to the first fixing flange (18) of the protruding portion (17) that surrounds it. Each catalytic converter module (11) is via a threaded connection (22) that extends through the second fixed flange (21,21a) and through the fixed flange (18,21,21a). The catalytic converter unit according to claim 1, wherein the catalytic converter unit is fixed to each of the first fixing flanges (18). The first fixing flange (18) and the second fixing flange (21,21a) project outwardly projecting segments (23, 24) for receiving and guiding the threaded connection (22). )
These segments (23,24) have insertion slots (25,26) on one side.
Through the insertion slots (25, 26), the individual screw connection portion (22) including the screw (22a) and the nut (22b) preassembled to the screw (22a) is formed by the fixing flange (18). , 21, 21a) The catalytic converter unit according to claim 2, wherein the segment (23, 24) can be inserted in the lateral direction. The catalytic converter according to claim 3, wherein the insertion slot (25, 26) is formed on the side of the segment (23, 24) facing away from the catalytic converter module (11). unit. A holder (27) for the nut (22b) is formed in the protruding portion (17) that surrounds the opening (16) in a frame shape.
With the holder (27), the nut (22b) is a screw connection portion composed of a screw (22a) and a nut (22b) preassembled in the insertion slot (25, 26) of the segment (23, 24). The holder (27) is brought into an engaged state during or after the insertion of (22), and the holder (27) fixes the nut (22b) when tightening the screw connection portion (22). The catalytic converter unit according to any one of claims 2 to 4. According to claim 3, in the region of the catalytic converter module (11) directly adjacent to each other, the segments (23, 24) of the fixed flanges (18, 21, 21 a) are offset from each other. The catalytic converter unit according to any one of claims 5. Each catalytic converter module (11) is 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) has a catalytic converter main 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) has a catalytic converter main body (13) having an angular cross section and a metal housing (12) having an angular 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 an angle in cross section. .. The catalytic converter unit according to any one of claims 1 to 9, wherein the fixed flanges (21a) of the plurality of catalytic converter modules are combined. An exhaust gas catalytic converter having a plurality of catalytic converter units (10) according to any one of claims 1 to 9.