Gas-driven liquid pump

Abstract

A gas-driven liquid pump includes a gas source, a tank, a pumping pipe, at least one gas conveying pipe, and at least one liquid conveying pipe. The pumping pipe includes a gas input end, a liquid output end and a suction portion located between the gas input end and the liquid output end. An inner diameter of the pumping pipe gradually decreases from the gas input end to the suction portion, and the inner diameter of the pumping pipe gradually increases from the suction portion to the liquid output end. At least one gas conveying pipe is configured for connecting the gas source and the gas input end of the pumping pipe. One end of the liquid conveying pipe is connected to the tank, and another end is engaged with the suction portion of the pumping pipe.

1 . A gas-driven liquid pump, comprising:
 a gas source;   a tank;   a pumping pipe comprising a gas input pipe and a liquid output pipe, the gas input pipe comprising a first end and a second end, an inner diameter of the gas input pipe gradually decreasing from the first end to the second end, the liquid output pipe comprising a third end and a fourth end, an inner diameter of the liquid output pipe gradually increasing from the third end to the fourth end, the second end being engaged with the third end, and the inner diameter of the second end being equal to the inner diameter of the third end;   at least one gas conveying pipe configured for connecting the gas source and the first end of the gas input pipe; and   at least one liquid conveying pipe, one end of the liquid conveying pipe being connected to the tank, and another end being engaged with the pumping pipe close to a joint between the gas input pipe and the liquid output pipe.   
     
     
         2 . The gas-driven liquid pumping apparatus as claimed in  claim 1 , wherein the joint is formed by the third end of the liquid output pipe and the second end of the gas input pipe. 
     
     
         3 . The gas-driven liquid pumping apparatus as claimed in  claim 1 , wherein an axis of the pumping pipe is a straight line, the liquid conveying pipe intersects with the axis at an acute angle. 
     
     
         4 . The gas-driven liquid pumping apparatus as claimed in  claim 3 , wherein the acute angle is in a range from about 30 degree to about 60 degree. 
     
     
         5 . The gas-driven liquid pumping apparatus as claimed in  claim 1 , wherein the pumping pipe has an integrated structure. 
     
     
         6 . The gas-driven liquid pumping apparatus as claimed in  claim 1 , wherein the second end of the gas input pipe is joined to the third end of the liquid output pipe by an adhesive. 
     
     
         7 . The gas-driven liquid pumping apparatus as claimed in  claim 1 , wherein the second end of the gas input pipe is mechanically joined with the third end of the liquid output pipe. 
     
     
         8 . The gas-driven liquid pumping apparatus as claimed in  claim 1 , wherein a length of the gas input pipe and liquid output pipe is respectively denoted by L1 and L2, a liquid level height of a liquid of the tank is denoted by H; L1 is in a range from about 0.25H to about 0.5H, L2 is in a range from about 1.5L1 to about 2.5L1. 
     
     
         9 . The gas-driven liquid pumping apparatus as claimed in  claim 8 , wherein the inner diameter of the first end, the second end, the third end and the fourth end is respectively denoted by D1, D2, D3 and D4; D1 is in a range from about 0.5L1 to about 0.7L1, D2 is in a range from about 0.3D1 to about 0.5D1, D3 is equal to D1, D4 is in a range from about 0.71D1 to about 0.8 D1. 
     
     
         10 . A gas-driven liquid pump, comprising:
 a gas source;   a tank;   a pumping pipe comprising a gas input end, a liquid output end and a suction portion located between the gas input end and the liquid output end, an inner diameter of the pumping pipe gradually decreasing from the gas input end to the suction portion, and the inner diameter of the pumping pipe gradually increasing from the suction portion to the liquid output end;   at least one gas conveying pipe configured for connecting the gas source and the gas input end of the pumping pipe; and   at least one liquid conveying pipe, one end of the liquid conveying pipe being connected to the tank, and another end being engaged with the suction portion of the pumping pipe.   
     
     
         11 . The gas-driven liquid pumping apparatus as claimed in  claim 11 , wherein an axis of the pumping pipe is a straight line, the liquid conveying pipe intersects with the axis at an acute angle. 
     
     
         12 . The gas-driven liquid pumping apparatus as claimed in  claim 11 , wherein the acute angle is in a range from about 30 degree to about 60 degree.