Liquid transfer device

Abstract

A liquid transfer device to discharge viscosity liquid from vacuum vessel to atmosphere, particularly comprising an extruding shaft sequentially equipped with an introducing segment, a pressurizing segment, a counter-pressurizing segment, and a discharging segment. The counter-pressurizing segment is mainly provided to generate a sealing ring, thereby preventing air leakage resulting from outlet to the viscosity liquid source.

What is claimed is:  
     
         1 . A liquid transfer device, introducing a liquid into a chamber via an inlet thereof and discharging the liquid via an outlet thereof, the liquid transfer device comprising: 
 a rotation actuator; and    a shaft, rotated by the rotation actuator, the shaft comprising: 
 an introducing segment, comprising a first spiral vane, provided to introduce the liquid from the inlet;  
 a pressurizing segment adjacent to the introducing segment, comprising a second spiral vane that spirals in accordance with the first spiral vane, wherein the pitches of the second spiral vane reduce gradually along the shaft for a pressurizing of the liquid;  
 a first counter-pressurizing segment adjacent to the pressurizing segment, comprising a third spiral vane that spirals contrary to the first spiral vane, whereby pushing the liquid with a contrary pressure; and  
 a discharging segment adjacent to the first counter-pressurizing segment, discharging the liquid via the outlet.  
   
     
     
         2 . The liquid transfer device of  claim 1 , wherein the contrary pressure surpasses the atmospheric pressure.  
     
     
         3 . The liquid transfer device of  claim 1 , wherein the shaft is further comprised of discharging vanes on the discharging segment, pushing the liquid out through the outlet.  
     
     
         4 . The liquid transfer device of  claim 1 , wherein the rotation actuator is a motor.  
     
     
         5 . A liquid transfer device, comprising: 
 a main body, comprising a chamber, an inlet and an outlet into and out of the chamber, and a menstruum inlet though which a menstruum is introduced to the chamber;    a shaft disposed in the chamber, comprising an introducing segment near the inlet and a discharging segment near the outlet;    a first pivot device equipped to the main body, pivoting one end of the shaft to the main body, wherein the end is adjacent to the discharging segment;    a rotation actuator, coupling and rotating the shaft; and    the shaft further comprising: 
 a first spiral vane, equipped to the introducing segment, introducing a liquid from the inlet and pushing the liquid toward the discharging segment along the shaft;  
 a pressurizing segment adjacent to the introducing segment, comprising a second spiral vane that spirals in accordance with the first spiral vane, and the pitches of which reduce gradually along the shaft, thereby pressuring the liquid;  
 a first counter-pressurizing segment disposed between the pressurizing segment and the discharging segment, comprising a third spiral vane that spirals contrary to the first spiral vane, thereby applying the liquid with a contrary pressure; and  
 a second counter-pressurizing segment disposed between the discharging segment and the first pivot device, comprising a fourth spiral vane that spirals contrary to the first spiral vane, applying the liquid with a contrary pressure and preventing the liquid from permeating the first pivot device.  
   
     
     
         6 . The liquid transfer device of  claim 5 , wherein the contrary pressure surpasses the atmospheric pressure.  
     
     
         7 . The liquid transfer device of  claim 5 , wherein the liquid is a liquid of high viscosity.  
     
     
         8 . The liquid transfer device of  claim 5 , wherein the liquid comprises melted thermoplastic materials.  
     
     
         9 . The liquid transfer device of  claim 5 , wherein the liquid is a melted polymer.  
     
     
         10 . The liquid transfer device of  claim 5 , further comprising a casing that covers the main body and forms a containing space between the casing and the main body, wherein the casing is comprised of at least two apertures, through which a heat-transfer media is conducted to enter and exit the containing space.  
     
     
         11 . The liquid transfer device of  claim 5 , wherein the discharging segment is further comprised of discharging vanes on the discharging segment, whereby pushing the liquid toward the outlet.  
     
     
         12 . The liquid transfer device of  claim 5 , further comprising a second pivot device equipped to the main body, whereby the shaft is pivoted to the main body with another end adjacent to the introducing segment.  
     
     
         13 . The liquid transfer device of  claim 12 , wherein the shaft further comprises a third counter-pressurizing segment disposing between the introducing segment and the second pivot device, wherein the third counter-pressurizing segment is comprised of a fifth spiral vane that spirals in accordance with the first spiral vane, whereby applying a pressure that preventing the liquid from permeating into the second pivot device.  
     
     
         14 . The liquid transfer device of  claim 13 , wherein the first and the second pivot device are sealing mechanisms.  
     
     
         15 . The liquid transfer device of  claim 5 , wherein the rotation actuator is a motor.