Arrangement in a pipe joint for a heat exchanger

Abstract

Pipe connection for heat exchangers ( 1 ) having a number of corrugated plates, where each plate has a first edge part opposite a second edge part and a third edge part opposite a fourth edge part, between which corrugated plates there are provided first and second flow channels. A heat-emitting medium ( 6 ) flows through every alternate channel and a heat absorbing medium ( 7 ) flows through every other alternate channel. A collecting channel ( 8 ) is provided having a diverging cross-section for the heat-emitting medium ( 6 ) and is placed at one side of the heat exchanger and connected to an inlet section of a combined inlet and outlet pipe joint ( 2, 3 ) for the heat emitting and heat absorbing media. An outgoing collection channel ( 4 ) for the heat-absorbing medium ( 7 ) is arranged on the same side of the heat exchanger and connected to an outlet section of the inlet and outlet pipe joint ( 2, 3 ). The inlet pipe joint ( 2 ) includes a deformable first pipe section ( 10 ), arranged to absorb thermal and mechanical loading in both axial and radial directions, and at least one further, second pipe section ( 2 a , 2 b ).

1 . A pipe connection for a heat exchanger ( 1 ) in which the heat exchanger comprises a number of corrugated plates, where each plate has a first edge part opposite a second edge part and a third edge part opposite a fourth edge part, between which corrugated plates there are provided first and second flow channels, where a heat emitting medium ( 6 ) flows through every alternate channel and a heat absorbing medium ( 7 ) flows through every other alternate channel, and where a collecting channel ( 8 ) with a diverging cross-section for said heat emitting medium ( 6 ) is placed at one side of the heat exchanger and connected to an inlet section a combined inlet and outlet pipe joint ( 2 ,  3 ) for said heat emitting and heat absorbing media, and an outgoing collection channel ( 4 ) for said heat absorbing medium ( 7 ) arranged on the same side of the heat exchanger and connected to an outlet section of said inlet and outlet pipe joint ( 2 ,  3 ), the inlet pipe joint ( 2 ) comprising a deformable first pipe section ( 10 ), arranged to absorb thermal and mechanical loading in both axial and radial directions, and at least one further, second pipe section ( 2   a ,  2   b ).  
     
     
         2 . The pipe connection for a heat exchanger as recited in  claim 1 , wherein the deformable first pipe section ( 10 ) further comprises a substantially cylindrical pipe having a corrugated cross-section in the axial direction of the pipe.  
     
     
         3 . The pipe connection for a heat exchanger as recited in  claim 2 , wherein the deformable first pipe section ( 10 ) has an inner diameter (D 1 ) corresponding to the smallest diameter of the corrugated section, equal to the inner diameter (D 2 ) of the adjoining second section ( 2 ).  
     
     
         4 . The pipe connection for a heat exchanger as recited in  claim 1 , wherein the deformable first pipe section ( 10 ) has a material thickness that is less than the thickness of the second pipe section.  
     
     
         5 . The pipe connection for a heat exchanger as recited in  claim 1 , wherein the second pipe section ( 2 ) has a cylindrical basic shape.  
     
     
         6 . The pipe connection for a heat exchanger as recited in  claim 5 , wherein the deformable first pipe section ( 10 ) is attached to the cylindrical pipe section ( 2 ) upstream in the direction of flow.  
     
     
         7 . The pipe connection for a heat exchanger as recited in  claim 5 , wherein the deformable first pipe section ( 10 ) is attached to the cylindrical pipe section ( 2 ) downstream in the direction of flow.  
     
     
         8 . The pipe connection for a heat exchanger as recited in  claim 5 , wherein the deformable first pipe section ( 10 ) is attached between the second, cylindrical pipe section ( 2   a ) and a third, cylindrical pipe section ( 2   b ).  
     
     
         9 . The pipe connection for a heat exchanger as recited in  claim 1 , wherein the second pipe section ( 2 ) has a conical basic shape.  
     
     
         10 . The pipe connection for a heat exchanger as recited in  claim 9 , wherein the deformable first pipe section ( 10 ) is attached to the conical pipe section ( 2 ) upstream in the direction of flow.  
     
     
         11 . The pipe connection for a heat exchanger as recited in  claim 9 , wherein the deformable first pipe section ( 10 ) is attached to the conical pipe section ( 2 ) downstream in the direction of flow.  
     
     
         12 . The pipe connection for a heat exchanger as recited in  claim 1 , wherein a combination of the inlet and outlet pipe joint comprises two substantially concentric pipes ( 2 ,  3 ).  
     
     
         13 . The pipe connection for a heat exchanger as recited in  claim 12 , wherein the deformable first pipe section ( 10 ) has an inner diameter (D 1 ) corresponding to the smallest diameter of the corrugated section, equal to the inner diameter (D 2 ) of the adjoining second section ( 2 ).  
     
     
         14 . The pipe connection for a heat exchanger as recited in  claim 12 , wherein the outer pipe joint ( 3 ) has a conical basic shape.  
     
     
         15 . The pipe connection for a heat exchanger as recited in  claim 1 , wherein the inlet pipe joint is welded to the incoming collection channel ( 8 ).  
     
     
         16 . The pipe connection for a heat exchanger as recited in  claim 1 , wherein the deformable section ( 10 ) is welded to the incoming collection channel ( 8 ).  
     
     
         17 . A pipe connection for a heat exchanger ( 1 ) comprising: 
 two substantially concentrically oriented conduits ( 2 ,  12 ) defining two flow channels, one of said flow channels configured as an annulus about the other;    at least one of said conduits ( 2 ,  12 ) comprising a deformable section ( 1 ) for absorbing thermal and mechanical loading in both axial and radial directions when installed on an heat exchanger operating in start-up mode.    
     
     
         18 . The pipe connection for a heat exchanger as recited in  claim 17 , wherein the deformable section ( 10 ) is configured as bellows corrugations.