Modular flange

Abstract

A multipart gas pipe flange for connecting to a counter-flange of an internal combustion engine, having at least one flange plate designed as an outer flange, and having a flange inner part that can be received in said flange plate and is used for attaching a gas pipe which is connected downstream of the inner part in the flow direction and which is fluidically connected. The flange plate has at least one recess for the flange inner part, said recess having at least one inner surface and an inner diameter Di, and a mounting surface which can be placed at least indirectly on the counter-flange. The flange inner part has an outer surface which corresponds to the inner surface and which has an outer diameter Da. The outer surface and the inner surface have a basic shape which tapers in the flow direction, and when being clamped against the counter flange, the outer surface and the inner surface can be clamped relative to each other at least partially in a direction (R) which runs radially in relation to a central axis of the outer surface and/or the inner surface.

What is claimed is: 
     
         1 . A multipart gas pipe flange for connecting to a counter-flange of an internal combustion engine, comprising: at least one flange plate designed as an outer flange, and comprising a flange inner part that can be received in said flange plate and is used for attaching a gas pipe which is connected downstream of the inner part in a flow direction and which is fluidically connected, wherein the flange plate has at least one recess for a single flange inner part, having an inner surface and an inner diameter Di, and a mounting surface which can be placed at least indirectly on the counter-flange, wherein the flange inner part has an outer surface which corresponds to the inner surface and which has an outer diameter Da, wherein the outer surface and the inner surface have a basic shape which tapers in the flow direction, and when being clamped against the counter flange the outer surface and the inner surface can be clamped relative to each other at least partially in a direction R which runs radially in relation to a central axis of the outer surface and/or the inner surface. 
     
     
         2 . The gas pipe flange according to  claim 1 , wherein the outer surface and the corresponding inner surface are formed as an envelope surface of a cone in basic shape and have an axial overlap d of at least 2 mm to 5 mm in regard to the center axis. 
     
     
         3 . The gas pipe flange according to  claim 2 , wherein the outer surface and/or the inner surface are profiled and/or have grooves, recesses or slots running in a circumferential direction and/or in a radial direction and/or in an axial direction in relation to the center axis. 
     
     
         4 . The gas pipe flange according to  claim 1 , wherein the flange inner part and/or the flange plate are made from deep drawn and/or punched sheet metal. 
     
     
         5 . The gas pipe flange according to  claim 1 , wherein the flange inner part at least in the assembled condition sticks out in an axial direction beyond the mounting surface of the flange plate. 
     
     
         6 . The gas pipe flange according to  claim 2 , wherein the flange plate is formed from several plates each with a recess, while the respective recess is conical or cylindrical in configuration and all the recesses form the conical basic shape of the inner surface. 
     
     
         7 . The gas pipe flange according to  claim 1 , wherein the flange inner part is formed from material more temperature resistant than the flange plate. 
     
     
         8 . A system consisting of a gas pipe flange according to  claim 1 , wherein a gas pipe is provided that is fastened only on the flange inner part and stands in fluidic connection with the flange inner part. 
     
     
         9 . A system consisting of a gas pipe flange according to  claim 1 , wherein a seal is provided, which has an encircling sealing bead which can bear against a bearing surface of the flange inner part and/or against the counter flange, wherein the seal has a sealing bead in the area of the flange inner part that at least in the assembled condition sticks out in an axial direction beyond a mounting surface of the flange plate. 
     
     
         10 . A system according to  claim 7  mounted on an exhaust gas system and/or on an internal combustion engine. 
     
     
         11 . A method for making a gas pipe flange according to  claim 1 , wherein at least the recess of the flange plate and/or at least the outer surface of the flange inner part are made by a deep drawing process and/or a punching process. 
     
     
         12 . The gas pipe flange according to  claim 3 , wherein the flange inner part and/or the flange plate are made from deep drawn and/or punched sheet metal. 
     
     
         13 . The gas pipe flange according to  claim 12 , wherein the flange inner part at least in the assembled condition sticks out in the axial direction beyond the mounting surface of the flange plate. 
     
     
         14 . The gas pipe flange according to  claim 13 , wherein the flange plate is formed from several plates each with a recess, while the respective recess is conical or cylindrical in configuration and all the recesses form the conical basic shape of the inner surface. 
     
     
         15 . A system consisting of a gas pipe flange according to  claim 14 , wherein a gas pipe is provided that is fastened only on the flange inner part and stands in fluidic connection with the flange inner part. 
     
     
         16 . The system according to  claim 15 , wherein a seal is provided, which has an encircling sealing bead which can bear against a bearing surface of the flange inner part and/or against the counter flange, wherein the seal has a sealing bead in the area of the flange inner part that at least in the assembled condition sticks out in the axial direction beyond a mounting surface of the flange plate. 
     
     
         17 . A method for making a gas pipe flange according to  claim 7 , wherein at least the recess of the flange plate and/or at least the outer surface of the flange inner part are made by a deep drawing process and/or a punching process.