KR20160117280A - Catalytic converter unit and exhaust gas catalytic converter - Google Patents

Abstract

The present invention relates to a catalytic converter unit (10) for an exhaust gas catalytic converter, and in particular, an SCR catalytic converter unit for an SCR catalytic converter of a internal combustion engine, with multiple catalytic converter modules (11), wherein each catalytic converter module (11) has a ceramic catalytic converter body through which exhaust gas flows and a metallic housing (12) for the ceramic catalytic converter body, wherein the respective ceramic catalytic converter body is received in the respective metallic housing (12) and is partially surrounded by the housing. Moreover, the catalytic converter modules (11) are positioned with first flowed-through ends on a support grating (13), wherein a counter-holder (14) is positioned at the opposite second flowed-through ends of the catalytic converter modules (11), and wherein the catalytic converter modules (11) are clamped between the support grating (13) and the counter- holder (14).

Description

TECHNICAL FIELD [0001] The present invention relates to a catalytic converter unit and an exhaust gas catalytic converter,

The present invention relates to a catalytic converter unit according to the preamble of claim 1. The present invention also 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 metal housing having a rectangular cross-section for a ceramic catalytic converter body and a ceramic catalytic converter body through which the exhaust gas flows, in which case the housing is also referred to as a canning. The housing of each catalytic converter module houses a respective catalytic converter body and encloses it in part, i. E., Under the exposures of the perfused end of the catalytic converter body, where one end is perfused, And the other end that is perfused provides a discharge end.

In a catalytic converter unit actually disclosed, the catalytic converter modules are arranged in an array manner in the form of a plurality of rows and columns, in which case the directly adjacent catalytic converter modules are fixedly connected, in particular by welding, in the region of the metal housing with a rectangular cross section. In the case where the catalytic converter is to be replaced in the catalytic converter unit, the weld connection can be separated by, for example, an angle grinder, which can damage adjacent catalytic converter modules. The connection of adjacent catalytic converter modules by welding provides thus a disadvantage.

There is therefore a need for a catalytic converter unit for a catalytic converter in which the catalytic converter modules can be replaced more simply.

It is an object of the present invention to provide a novel catalytic converter unit for an exhaust gas catalytic converter and an exhaust gas catalytic converter including such a catalytic converter unit.

This problem is solved by the catalytic converter unit according to claim 1.

The perfused first end of the catalytic converter module in accordance with the present invention is positioned on a support grid, in which case the counter holder is positioned at the oppositely disposed second end of the catalytic converter module. The catalytic converter module is clamped between the support grid and the counter holder. The counter holder includes a plurality of counter holder struts extending parallel to each other, the first end of the strut acting on the housing structure of the exhaust gas catalytic converter and the second oppositely disposed end extending perpendicular to the counter holder strut Down hold clamp struts. The second end of the counter-holder strut is connected to the hold-down clamp strut by connecting means extending in the axial direction of the counter-holder strut and as a result of the connection, the first end of the hold-down clamp strut presses the structural member of the housing structure . The present invention allows for a simple trouble-free exchange of catalytic converter modules of the catalytic converter unit and the reliable clamping of the catalytic converter module between the supporting grid and the counter holder without risk of damage for adjacent catalytic converter modules.

According to a preferred refinement, the first end of the counter-holder strut presses the inclined contour of the structural member of the housing structure such that the counter-holder strut applies the clamping force to the catalytic converter module in the region of the first end of the strut. Whereby the catalytic converter module is particularly preferably clampable between the support grid and the counter holder.

According to another preferred refinement, it is possible to provide force in the second end region to all counter holder struts through the hold down clamp struts to clamp the catalytic converter module between the support grid and the counter holder. Whereby the catalytic converter modules are particularly preferably clampable between the support grid and the counter holder.

Preferably, the hold-down clamp struts can be provided with a clamping force via a press-down device, which acts on the one hand hold down clamp strut and on the other hand acts on the housing structure of the exhaust gas catalytic converter. This makes it particularly preferable for the catalytic converter module to be clamped between the support grid and the counter holder.

According to another preferred refinement, the spring members elastically support the hold down clamp strut in the housing structure of the exhaust gas catalytic converter and / or the counter holder strut to the catalytic converter module and / or the hold down clamp strut. Such an elastic support is desirable to compensate for expansion due to temperature.

An exhaust gas catalytic converter according to the present invention is defined in claim 9.

Preferred embodiments of the invention are set forth in the dependent claims and the following description. The embodiments of the present invention are not limited thereto and are described with reference to the drawings.

1 is a perspective view showing a catalytic converter unit according to the present invention for an exhaust gas catalytic converter;
Figure 2 is a cross-sectional view of the catalytic converter unit of Figure 1;
Figure 3 shows the catalytic converter unit of figure 1 without a counter holder;
Fig. 4 is a view showing a counter holder of the catalytic converter unit of Fig. 1; Fig.
5 shows the detail V of Fig. 1; Fig.
Figure 6 shows detail VI of Figure 1;

The present invention relates to a catalytic converter unit for an exhaust gas catalytic converter of an internal combustion engine for marine or naval use. In particular, the catalytic converter unit according to the present invention is formed as an SCR-catalytic converter unit for an SCR-exhaust gas catalytic converter of a marine diesel internal combustion engine. Figures 1-6 illustrate various aspects and details of a preferred embodiment of a catalytic converter unit.

The catalytic converter unit 10 according to the present invention comprises a plurality of catalytic converter modules 11, in which case the catalytic converter modules are positioned directly adjacent in the form of rows and columns in an array manner. Each catalytic converter module 11 includes a metal housing 12, which receives a ceramic catalytic converter body, not shown. The metal housing 12 has a rectangular cross-section in the illustrated embodiment, in which case the housing 12 partially encloses the rectangular catalytic converter body from the outside. A housing 12, also referred to as a canning, exposes the catalytic converter body at an end disposed opposite the inlet end and the outlet end of each catalytic converter module 11.

The catalytic converter unit (10) includes a support grid (13). The region of the first end which is perfused in the catalytic converter module 11 is arranged on the support grid 13. The counter holder 14 is positioned at the oppositely disposed second end of the catalytic converter module 11 wherein the catalytic converter module 11 is clamped between the support grid 13 and the counter holder 14 .

As best seen in Figure 1, the support grid 13 comprises a plurality of first support struts 15a extending parallel to one another and also extending parallel to one another and perpendicular to the first support struts 15a A plurality of second support struts 15b on which the catalytic converter module 11 is positioned.

One sealing member 16 (see FIG. 6) is disposed between the supporting struts 15a or 15b directly adjoining the catalytic converter module 11 positioned above and directly parallel to each other of the supporting grid 13 And the sealing member blocks the exhaust gas flow through the housings 12 of the directly adjoining catalytic converter module 11. 6 shows a gap 17 between the housings 12 of the two catalytic converter modules 11 directly adjacent to that of Figure 6 and in this case the sealing member 16 is arranged between the exhaust gases through the gap 17 Thus ensuring that the entire exhaust gas flow through the catalytic converter body of the catalytic converter module 11. The sealing member 16 shown in Fig. 6 is positioned on a profile carrier 18 profiled in a U-shape and the carrier is supported in the supporting struts 13 15b.

6, the first end of the housing 12 of the catalytic converter module 11 that is perfused includes a curved or flanged support leg 19, which supports the sealing member 16 Or on the support member. If the wall thickness of the canning at the end is sufficiently large, the flanging can be omitted. The wall thickness shall be between 2 mm and 20 mm for this purpose. A gap 20 is formed between the second end of the catalytic converter module 11 and the support struts 15a and 15b in Figure 6 and the gap is preferably formed between the support grid 13 and the counter holder 14 After the clamping of the catalytic converter module 11.

As can be seen in Fig. 6, the individual support struts 15a, 15b of the support grid 13 cooperate with the respective catalytic converter modules 11. The supporting legs 19 of the catalytic converter module 11 are engaged in the free space defined between the directly adjacent supporting struts 15a or 15b and the sealing members 16 are positioned in the free space. This allows the support struts 15a, 15b extending parallel to one another to provide individual tolerance compensation for the dimensional tolerances of the catalytic converter module 11, so that the individual tolerances of the adjacent catalytic converter modules 11 are not added. Thus, the catalytic converter unit 10 according to the present invention can be particularly preferably incorporated into the housing structure of the exhaust gas catalytic converter.

As described above, the catalytic converter module 11 is clamped between the support grid 13 and the counter holder 14. The counter holder 14 includes a plurality of counter holder struts 21 extending parallel to one another. The first end 22 of each counter holder strut 21 acts on the housing structure 27a of the exhaust gas catalytic converter and the hold down clamp struts 24 extending perpendicularly to the counter holder struts 21 And acts together with the counterholder strut at the oppositely disposed second end 23.

A clamping force is provided to the counter holder strut 21 through the hold down clamp strut 24 to clamp the catalytic converter module 11 between the support grid 13 and the counter holder 14. [ The clamping force causes the counter holder struts 23 to be pressed against the housing 12 of the catalytic converter module 11 so that the catalytic converter modules 11 are finally pressed against the support grid 13, As a result, the catalytic converter module 11 is clamped between the support grid 13 and the counter holder 14.

Counter holder struts (21) extending along two rows or rows positioned directly adjacent to the catalytic converter modules (11) are supported on the catalytic converter module (11) in the directly adjacent column or row. Only the external counter holder struts 21 are supported on only one row or column of the catalytic converter module 1. [

The clamping force that can be provided to the counter holder struts 21 of the counter holder 14 via the hold down clamp struts 24 is provided by two press down devices 26 in the illustrated embodiment, The devices act on the oppositely disposed ends of the hold down clamp strut 24. The first end of each press-down device 26 acts on the hold-down clamp struts 24 and the second end acts on the housing structure 27b of the catalytic converter housing, in which case the press-down device 26 The spacing and clamping force between the housing structure 27b and the hold down clamp strut 24 can be adjusted by the nut 28 acting together.

The second end 23 of the counter holder struts 21 is connected to the hold down clamp strut 24 by connecting means 25 extending in the axial direction of the counter holder struts 21, The first end 22 of the struts 21 presses the structural member 29 of the housing structure 27a. As best seen in Figure 5 the connecting means 25 extend through the flange section 30 at the second end 23 of each counterholder strut 21 and into the counter holder struts 21 Down clamp struts 24, that is to say in the axial direction or longitudinal direction of the counter-holder struts 21. The clamp- A force acting in the axial or longitudinal direction of the counter-holder strut 21 is exerted on the counter-holder strut 21 by means of a connection which is preferably implemented by a connecting screw, The end portion 22 presses the inclined contour 31 of the structural members 29 of the housing structure 27a. In this case, the counter-holder struts 21 apply a different clamping force to the catalytic converter module 11 in the region of the first end 22.

The clamping force required to clamp the catalytic converter module 11 between the support grid 13 and the counter holder 14 is thus the clamping force required to clamp the hold down clamp strut 24 and the second end 23 of the counter holder strut 21 On the one hand and on the other hand by the cooperation of the connecting means 25 and the structural member 29 of the housing structure 27a and the counter holder strut 21, To the housing (12) of the catalytic converter module (11).

According to a preferred refinement of the invention, the counter holder 14 is resiliently supported in the housing structure 27b, that is to say that of the press-down device 26 between the hold-down clamp strut 24 and the housing structure 27b Is supported by a spring member (32) supported in the region.

Also, the catalytic converter unit 10 can be elastically supported by spring members (not shown), which are arranged between the housing structure 27c of the catalytic converter housing of the exhaust gas catalytic converter and the support grid 13 .

The spring members may also be provided with spring members which are not shown and which may be provided with a counter holder strut 21 in the housing 12 and / or the hold down clamp strut 24 of the catalytic converter module 11 and / 27, respectively.

These spring members can compensate for variations in the geometric shape of the catalytic converter unit 10 due to temperature cycling. In addition, it is possible to implement the counter holder elastically, especially using spring steel.

Thus, the catalytic converter unit 10 according to the present invention comprises a plurality of catalytic converter modules 11, arranged in an array manner in rows and columns positioned directly adjacent to each other. The housing 12, of which the catalytic converter module 11 is rectangular in cross section, is supported on the stationary support grid 13 by a first end. A counter holder 14 is disposed on the opposed side of the catalytic converter module 11 and the counter holder includes a plurality of movable counter holder struts 21 and one hold down clamp strut 24. The catalytic converter modules (11) are clamped between the stationary support grid (13) and the movable counter holder (14).

The first end 22 of each counter-holder strut 21 acts on the housing structure 27a of the housing of the exhaust gas catalytic converter and is common to the oppositely disposed second ends 23 of the counter- The catalytic converter module 11 can finally be clamped between the support grid 13 and the counter holder 14 because the hold down clamp strut 24 of the catalytic converter module 11 acts. The first clamping force may in this case be provided to the hold down clamp strut 24 via the press down device 26 and the second end 23 of the counter holder strut 21 via the hold down clamp strut 24. [ As shown in FIG. The second clamping force is provided by the cooperation of the connecting means 25 at the first end 22 of the counter holder strut 21 and the inclined contour 31 of the structural member 29 of the housing structure 27a.

The contour 31 of the structural members 29 of the housing structure 27a is such that the first end 22 of the counter-holder strut 21 is moved axially or longitudinally The more strongly the structural members 29 of the housing structure 27a or the housing structure 27a are pressed against the contour 31 of the structural members 29, 22 are inclined so as to strongly press the housing 12 of the catalytic converter module 11.

The thermal expansion of the catalytic converter unit 10 is preferably compensated by the spring members and the spring members are connected to the support grid 13 and / or to the hold down clamp struts 24 and / or to the counter holder struts 21 . An alternative to providing compensation for thermal expansion is to manufacture the counter-holder struts 21 and preferably the hold-down clamp struts 24 of the counter holder 14 with an elastic material, particularly spring steel. The thermal expansion which can be caused thereby can be directly blocked by the counter holder 14 and compensated.

These plurality of catalytic converter units 10 are used in the housing of the exhaust gas catalytic converter.

10: catalytic converter unit 11: catalytic converter module
12: housing 13: support grid
14: Counter holder 15a: Support strut
15b: support strut 16: sealing member
17: gap 18: profile carrier
19: support leg 20: gap
21: counter holder strut 22: end
23: end 24: hold down clamp strut
25: connecting means 26: press-down device
27a: housing structure 27b: housing structure
27c: housing structure 28: nut
29: structural member 30: flange section
31: contour 32: spring member

Claims (9)

A catalytic converter unit (10) for an exhaust gas catalytic converter, in particular an SCR-catalytic converter unit for an internal combustion engine SCR-exhaust gas catalytic converter, comprising a plurality of catalytic converter modules (11) 11 includes a ceramic catalytic converter body through which exhaust gas flows and a metal housing 12 for a ceramic catalytic converter body, each ceramic catalytic converter body being received in a respective metal housing 12, In the partially enclosed catalytic converter unit (30)
The first end of the catalytic converter modules 11 that is perfused is positioned on the support grid 13 and the counter holder 14 is located at the second arranged opposite end of the catalytic converter module 11 And the catalytic converter modules 11 are clamped between the support grid 13 and the counter holder 14 and the counter holder 14 comprises a plurality of counter holder struts 21 extending parallel to each other Wherein the first ends 22 of the struts act on the housing structure 27a of the exhaust gas catalytic converter and the oppositely disposed second ends 23 extend perpendicularly to the counter holder struts 21 Down clamp strut 24 and the second end 23 of the counter-holder strut 21 is supported by connecting means 25 extending in the axial direction of the counter- Connected to the clamp strut 24, As a result the first end 22 of the counter holder, the strut 21 has a catalytic converter unit, characterized in that for pressing the structure member 29 of the housing structure (27a). 2. A method according to claim 1, wherein the counter holder struts (21) are adapted to apply a clamping force to the catalytic converter module (11) in the region of the first end (22) Characterized in that the first end (22) presses the inclined contour (31) of the support members (29) of the housing structure (27a). Clamping device according to any one of the preceding claims, characterized in that it comprises means for clamping said catalytic converter module (11) between said support grid (13) and said counter holder (14) via said hold down clamp strut Is capable of providing an in-zone force of the counter-holder strut (21) to all the counter-holder struts (21). The clamping device of claim 3, wherein the hold down clamp strut (24) is capable of providing a clamping force via a press down device (26), the clamping force acting on the hold down clamp strut (24) (27) of the exhaust gas catalytic converter. ≪ Desc / Clms Page number 13 > 5. A device according to any one of claims 1 to 4, characterized in that the spring members (32) elastically support the hold down clamp strut (24) to the housing structure (27) of the exhaust gas catalytic converter Catalytic converter unit. 6. Module according to any one of claims 1 to 5, characterized in that the spring members are arranged in such a way that the counter holder struts (21) are connected to the catalytic converter module (11) and / or to the hold down clamp struts (24) and / And elastically supports the members (29). 7. A catalytic converter unit according to any one of claims 1 to 6, characterized in that the structural members (29) are resiliently mounted to the housing structure (27). 8. A catalytic converter unit according to any one of claims 1 to 7, characterized in that the counter holders (21) are embodied elastically, preferably spring steel. An exhaust gas catalytic converter comprising a plurality of catalytic converter units (10) according to any one of claims 1 to 8.

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