Feeding pump device of volume tube continually metering type

Abstract

A feeding pump device of volume tube continually metering type comprises: a volume tube ( 1 ) provided with metering volume section ( 11 ), a dragging mechanism ( 2 ), and an unilateral inlet valve ( 8 ) and an unilateral outlet valve ( 7 ). Said volume tube ( 1 ) particularly have two unilateral inlet valves ( 8 ) and two unilateral outlet valves ( 7 ) provided in two ends of inner wall thereof respectively. A piston ( 9 ) connected to the said dragging mechanism ( 2 ) is provided in said volume tube ( 1 ). The present invention provides a design scheme of feeding pump, of which metering mode is based on measuring displacement of the piston, and takes reciprocation times of the piston as computation base. The unit of metering is the product of minimal distinguish unit of grating ruler and cross section area of metering volume section of the volume tube, and the pump has both the function of the conventional volume tube device and medium metering type feeding pump and develops it.

1 . A feeding pump device of volume tube continually metering type comprises: a volume tube ( 1 ) provided with metering volume section ( 11 ), a dragging mechanism ( 2 ), and an unilateral inlet valve ( 8 ) and an unilateral outlet valve ( 7 ). Said volume tube ( 1 ) particularly have two unilateral inlet valves ( 8 ) and two unilateral outlet valves ( 7 ) provided in two ends of inner wall thereof respectively. A piston ( 9 ) connected to the said dragging mechanism ( 2 ) is provided in said volume tube ( 1 ).  
   
   
       2 . A feeding pump device of volume tube continually metering type of  claim 1 , wherein a grating R( 4 ) is also set on the moving route of the dragging rod of the mentioned piston ( 9 ).  
   
   
       3 . A feeding pump device of volume tube continually metering type of  claim 1 , wherein the mentioned dragging mechanism ( 2 ) also includes servo motor ( 22 ), belt gear ( 21 ), lead screw ( 23 ) and lead screw nut ( 25 ), which is connected in turn.  
   
   
       4 . A feeding pump device of volume tube continually metering type of  claim 1 , wherein a casing pipe ( 6 ) of lead screw connected with the mentioned piston ( 9 ) is set at the outside of mentioned lead screw ( 23 )  
   
   
       5 . A feeding pump device of volume tube continually metering type of  claim 1 , wherein the mentioned dragging mechanism ( 2 ) is a linear motor.