Processing Cavity Pump and an Associated Pump Device

Abstract

A progressing cavity pump comprises a stator having an inlet end for coupling to a fluid-receiving casing, the pump including an anchor element suitable for fastening the inlet end of the stator on a stationary support, and said inlet end and said anchor element including locking means for locking them together in rotation.

1 . A progressing cavity pump comprising a stator having an inlet end for coupling to a fluid-receiving casing; the pump including an anchor element having at least one leg and at least one clamping body; said leg being suitable for standing on and for being fastened to a stationary plane support; said clamping body being suitable for clamping the inlet end of the stator; and said inlet end and said clamping body including locking means for locking them together in rotation. 
     
     
         2 . A pump according to  claim 1 , wherein the locking means comprise:
 at least one stator portion in relief forming part of said inlet end of the stator; and   at least one anchor portion in relief forming part of the clamping body; the anchor portion in relief being suitable for co-operating in complementary manner with said stator portion in relief.   
     
     
         3 . A pump according to  claim 1 , wherein the stator portion in relief and the anchor portion in relief are positioned in such a manner that when the anchor element is fastened to the stator and on the stationary support, the longitudinal axis of the first cell is substantially vertical. 
     
     
         4 . A pump according to  claim 1 , wherein the stator portion in relief is a recess. 
     
     
         5 . A pump according to  claim 2 , wherein the clamping body comprises at least one clamping arm and a separate part carried by the clamping arm, the anchor portion in relief being formed on the separate part. 
     
     
         6 . A pump according to  claim 5 , wherein the stator portion in relief is a portion of a groove having a rectilinear bottom, and wherein the separate part is an assembly rod suitable for being engaged in the groove portion; said assembly rod being fastened to the clamping arm. 
     
     
         7 . A pump according to  claim 6 , wherein the clamping body comprises at least two half-collars, and wherein the assembly rod is suitable for being engaged in through holes provided respectively in the half-collars; said assembly rod being provided at each of its ends with an axial locking element. 
     
     
         8 . A pump according to  claim 5 , wherein the separate part is a set screw suitable for coming into abutment against the stator portion in relief; said set screw being fastened to the clamping arm. 
     
     
         9 . A pump according to  claim 2 , wherein the stator portion in relief is a flat and wherein the separate part is a set screw suitable for coming into abutment against the stator portion in relief; said set screw being fastened to the clamping arm. 
     
     
         10 . A pump according to  claim 2 , wherein the anchor portion in relief is formed on the clamping body, and wherein the stator portion in relief is a flat. 
     
     
         11 . A pump according to  claim 1 , wherein the stator possesses an outlet end for coupling to a fluid delivery duct, and wherein the outlet end possesses a smooth annular groove. 
     
     
         12 . A pump according to  claim 1 , wherein the stator possesses an outlet end for coupling to a fluid delivery duct, and wherein the pump further includes a fastener member suitable for fastening the inlet end or the outlet end to an end tube fitting; the fastener member including a pull rod provided with first and second fastener elements. 
     
     
         13 . A pump according to  claim 12 , wherein the first fastener element comprises an oblong key of longitudinal axis suitable for being engaged in a keyhole in the end tube fitting, the keyhole including at least one first setback having a longitudinal axis, the longitudinal axis of the key being perpendicular to the longitudinal axis of the first setback when the fastener member is fastened to the clamping body. 
     
     
         14 . A pump according to  claim 12 , wherein the second fastener element comprises a thread and a nut suitable for being screwed onto the thread; said nut being suitable for coming into abutment against the anchor element. 
     
     
         15 . A pump device comprising:
 a fluid reception casing; the casing including a keyhole;   a drive shaft housed in the casing, one end of the drive shaft being designed to be coupled to a drive motor;   a progressing cavity pump according to  claim 1 ; the stator having an inlet end coupled to the casing; one end of the rotor being coupled to the other end of the drive shaft; and   a fluid delivery duct, the stator including an outlet end coupled to the delivery duct.