Frame Part For A Shell-And-Tube Heat Exchanger

Abstract

The invention relates to a frame part for a shell-and-tube heat exchanger. The frame parts should be designed so that given a simplified producibility of the frame parts, a complete compensation for expansion in the longitudinal direction as well as in the transverse direction of the frame part is nevertheless ensured. According to the invention, a frame part for a shell-and-tube heat exchanger comprises a number of tubes, which are parallel to one another, form a tube body, and are flowed through by a heat exchanging medium. The tube body is surrounded by frame parts at least on two sides that are parallel to the tubes. At least one thermal expansion element is formed at least in the frame parts that are oriented parallel to the tubes. The thickness of this thermal expansion element is at least a multiple of that of the material of the frame part where it deviates.

1 . A shell-and-tube heat exchanger, in which a heat exchange medium flows through a number of tubes which run parallel to one another and form a tubular body, the tubular body being adjoined by a frame part at least on one side running parallel to the tubes, wherein Ω-shaped thermal expansion elements which are deflected out of the plane of the frame part by a multiple of the material thickness of the material of the frame part are molded at least into the frame parts which are aligned parallel to the tubes.  
   
   
       2 . The shell-and-tube heat exchanger as claimed in  claim 1 , characterized in that the thermal expansion elements are made from the material of the frame part.  
   
   
       3 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein the thermal expansion elements are connected integrally to the frame part at least on one side.  
   
   
       4 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein the Ω-shaped thermal expansion element comprises a height offset (h) in the plane of extent of the frame part on both sides of the thermal expansion element.  
   
   
       5 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein two Ω-shaped partial sections are formed one behind the other, the sections of curvature of which preferably lie on the mutually opposite sides of the frame part, the thermal expansion element in particular including a height offset (h) in the plane of extent of the frame part on both sides of the thermal expansion element.  
   
   
       6 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein the thermal coefficient of expansion of the frame part in the region of the thermal expansion element is at most equal to the thermal coefficient of expansion of the tubes.  
   
   
       7 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein a thermal expansion element is designed as at least one web which does not extend over the entire width of the frame part and is preferably formed from at least two webs which form a continuous edge in particular on both sides of the frame part.  
   
   
       8 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein a thermal expansion element is formed in a section of the frame part that corresponds to an end region of the tubes, preferably in the region in which the tubes are fastened by welding to another body, such as a collecting tube or a distributor tube.  
   
   
       9 . The shell-and-tube heat exchanger as claimed in  claim 8 , wherein thermal expansion elements are formed in each case on both sides in the section of the frame part that corresponds to the end region of the tubes.  
   
   
       10 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein external ribs which are thermally contacted by the tubes are provided, which external ribs are aligned in particular transversely to the longitudinal direction of the tubes and, preferably on the end, bear at least on one side against a frame part, in particular are connected thereto.  
   
   
       11 . The shell-and-tube heat exchanger as claimed in  claim 1 , wherein the frame part is reduced in sections between Ω-shaped thermal expansion elements to meandering material webs which have planiform material tongues which preferably protrude laterally and are aligned in the plane of the frame part.