Concrete container for vacuum applications

Abstract

The invention relates to a container for vacuum applications comprising a concrete casing, the casing of the container being provided internally or externally with a coating having a tensile adhesive strength which at least corresponds to an external pressure loading of one bar. The concrete is preferably in the form of reinforced concrete, and the coating is a polymer, preferably an epoxy resin.

1 - 15 . (canceled) 
   
   
       16 . A container for vacuum applications comprising a concrete casing, said concrete casing including an a coating upon an interior or exterior surface thereof, said coating having having an adhesive tensile strength which at least corresponds to a pressure load of 1 bar. 
   
   
       17 . The container according to  claim 16 , wherein said concrete casing is formed of steel reinforced concrete. 
   
   
       18 . The container according to  claim 16 , wherein said coating comprises a plastic material. 
   
   
       19 . The container according to  claim 18 , wherein said plastic material comprises an epoxy resin. 
   
   
       20 . The container according to  claim 19 , wherein said epoxy resin is a two-component epoxy resin. 
   
   
       21 . The container according to  claim 16 , wherein said concrete casing includes a suction stub and hatches. 
   
   
       22 . The container according to  claim 21 , wherein said suction stub and said hatches are fixed to flange adapters which are cast into said concrete casing. 
   
   
       23 . The container according to  claim 21 , wherein said suction stub and said hatches are fixed to flange adapters which are fixed to said concrete casing by means of a glue layer. 
   
   
       24 . The container according to  claim 16 , wherein said concrete casing is configured to be hermetically sealed and to be evacuated by a vacuum pump to a preselect final pressure. 
   
   
       25 . The container according to  claim 16 , wherein said concrete casing is dimensioned to balance rotors under vacuum conditions in an interior compartment thereof. 
   
   
       26 . The container according to  claim 25 , wherein the rotors comprise turbines or compressors. 
   
   
       27 . The container according to  claim 25 , wherein the rotors include plates. 
   
   
       28 . The container according to  claim 27 , wherein the plates are fixed to the rotor. 
   
   
       29 . The container according to  claim 25 , wherein the rotors carry plated impellers. 
   
   
       30 . The container according to  claim 25 , wherein the rotors are configured for use in electro motors or generators and comprise coils.