Circulation pump

Abstract

A circulation pump for fluid and, in particular, a rotary pump with a rotatable impeller and a degassing device is suggested, wherein the degassing device comprises a gas line which opens at a first end into an area on the impeller and which opens at a second end into an area with a lower pressure in relation to an interior pressure of the circulation pump.

1 . A circulation pump for fluid, comprising: 
 a rotatable impeller; and    a degassing device,    wherein the degassing device comprises a gas line opening at a first end into an area on the impeller and opening at a second end into an area with a lower pressure in relation to an interior pressure of the circulation pump.    
   
   
       2 . The circulation pump as defined in  claim 1 , wherein the first end of the gas line opens into an area on the impeller where fluid eddies are able to form.  
   
   
       3 . The circulation pump as defined in  claim 1 , wherein the first end of the gas line opens into an area on the impeller where gas is able to accumulate.  
   
   
       4 . The circulation pump as defined in  claim 1 , wherein a higher interior pressure than external pressure prevails at least during operation.  
   
   
       5 . The circulation pump as defined in  claim 4 , wherein the second end of the gas line opens into an exterior space.  
   
   
       6 . The circulation pump as defined in  claim 1 , wherein a valve is arranged at the second end of the gas line.  
   
   
       7 . The circulation pump as defined in  claim 1 , wherein the gas line is adapted to be closed at its second end.  
   
   
       8 . The circulation pump as defined in  claim 7 , wherein the gas line is adapted to be closed manually.  
   
   
       9 . The circulation pump as defined in  claim 7 , characterized in that wherein a screw is provided for closing the gas line.  
   
   
       10 . The circulation pump as defined in  claim 7 , wherein the gas line is adapted to be closed automatically.  
   
   
       11 . The circulation pump as defined in  claim 10 , wherein a float is provided for closing the gas line said float being in effective fluid communication with an interior of the circulation pump.  
   
   
       12 . The circulation pump as defined in  claim 11 , wherein the float is arranged in a receiving chamber of the gas line.  
   
   
       13 . The circulation pump as defined in  claim 1 , wherein the gas line is guided through an intake area of the circulation pump.  
   
   
       14 . The circulation pump as defined in  claim 1 , wherein the first end of the gas line opens into an area in the vicinity of a sealing gap between an intake area and the impeller.  
   
   
       15 . The circulation pump as defined in  claim 1 , wherein the gas line comprises a pipe.  
   
   
       16 . The circulation pump as defined in  claim 1 , wherein the gas line is aligned essentially parallel to the axis of rotation of the impeller at least in one section.  
   
   
       17 . The circulation pump as defined in  claim 1 , wherein the gas line is aligned at an angle to an axis of rotation of the impeller at least in one section.  
   
   
       18 . The circulation pump as defined in  claim 1 , wherein a device generating underpressure is arranged at the second end of the gas line.  
   
   
       19 . The circulation pump as defined in  claim 1 , wherein the pump is a rotary pump.  
   
   
       20 . The circulation pump as defined in  claim 1 , wherein the impeller is arranged on a rotor mounted in a spherical bearing.  
   
   
       21 . The circulation pump as defined in  claim 1 , wherein the first end of the gas line faces a central area of the impeller.  
   
   
       22 . The circulation pump as defined in  claim 1 , wherein the first end of the gas line faces a side of the impeller allocated to an intake side of the circulation pump.  
   
   
       23 . The circulation pump as defined in  claim 1 , wherein the impeller has a cavity, the first end of the gas line opening into said cavity.  
   
   
       24 . A circulation pump for fluid, comprising: 
 an internal pump region adapted to have fluid flow therethrough during operation of the pump; and    a gas line extending from said internal pump region and adapted to facilitate venting of gas accumulating within said internal pump region.    
   
   
       25 . The circulation pump as defined in  claim 24 , further comprising an impeller, wherein the gas line opens into an area on the impeller where fluid eddies are able to form.  
   
   
       26 . The circulation pump as defined in  claim 24 , wherein the gas line is adapted to vent gas to a region having lower pressure than a pressure of the internal region.  
   
   
       27 . The circulation pump as defined in  claim 24 , wherein gas line is adapted to vent gas into an exterior space.  
   
   
       28 . The circulation pump as defined in  claim 24 , further comprising: a valve positioned along the gas line to control the venting of gas.  
   
   
       29 . The circulation pump as defined in  claim 24 , further comprising: a float in effective fluid communication with the internal region and adapted to open a valve when sufficient gas has accumulated.  
   
   
       30 . The circulation pump as defined in  claim 29 , wherein the float is arranged in a receiving chamber of the gas line.