Pressurized liquid lifting device and liquid lifting method

Patent metadata

Field	Value
Publication number	US-9316235-B2
Application number	US-201514801873-A
Country	US
Kind code	B2
Filing date	Jul 17, 2015
Priority date	Jan 18, 2013
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A liquid lifting device includes: a liquid lifting tank storing liquid; an air pump pressurizing the interior of the liquid lifting tank; a liquid lifting pipe connecting the liquid lifting pipe to the liquid lifting tank having a liquid delivery port in the other end that stands upright; an air supply pipe in which one end portion of the air supply pipe connected to a branching section provided at a position halfway in the liquid lifting pipe and an upright section provided in the other end portion thereof; an air valve that is provided on the other end portion of the air supply pipe; and a liquid storage section that is formed in part of the liquid lifting pipe at a position between the liquid delivery port and the branching section and that is positioned below the branching section.

First claim

The invention claimed is:

1. A pressurized liquid lifting device comprising:
a liquid lifting tank that has an airtight structure and stores liquid;
an air pump that pressurizes an interior of the liquid lifting tank;
a liquid lifting pipe of which one end communicates with the liquid in the liquid lifting tank and the other end portion stands upright, wherein a liquid delivery port is provided in a leading end of the other end portion, and a height from a liquid surface in the liquid lifting tank to the liquid delivery port is larger than a potential liquid lifting height of the air pump;
an air supply pipe of which one end portion is connected to a branching section provided at a position halfway in the liquid lifting pipe, wherein an upright section which stands upright is provided between the one end portion of the air supply pipe and the air supply pipe's other end portion
an air valve that is provided on the other end portion of the air supply pipe and that is configured to open/close with respect to outside air; and
a liquid storage section that is provided in the liquid lifting pipe at a position between the liquid delivery port and the branching section, positioned below the branching section and configured to store a predetermined amount of liquid,
wherein the branching section is provided at a position that is higher than the height of the liquid surface in the liquid lifting tank and lower than the potential liquid lifting height of the air pump.

2. The pressurized liquid lifting device according to claim 1 ,
wherein the upright section of the air supply pipe extends up to a position higher than the potential liquid lifting height of the air pump, and
the air valve is attached to the upright section of the air supply pipe at a position higher than the potential liquid lifting height of the air pump.

3. The pressurized liquid lifting device according to claim 1 ,
wherein the air valve is a check valve that only allows an airflow from outside air into the air supply pipe.

4. The pressurized liquid lifting device according to claim 1 ,
wherein a volume of the liquid storage section is smaller than a product of a cross-sectional area of the liquid lifting pipe and the potential liquid lifting height of the air pump.

5. A liquid lifting method that uses a pressurized liquid lifting device, the device includes:
a liquid lifting tank that has an airtight structure and stores liquid;
an air pump that pressurizes an interior of the liquid lifting tank;
a liquid lifting pipe of which one end communicates with the liquid in the liquid lifting tank and the other end portion stands upright, wherein a liquid delivery port is provided in a leading end of the other end portion, and a height from a liquid surface in the liquid lifting tank to the liquid delivery port is larger than a potential liquid lifting height of the air pump;
an air supply pipe of which one end portion is connected to a branching section provided at a position halfway in the liquid lifting pipe, wherein an upright section which stands upright is provided between the one end portion of the air supply pipe and the air supply pipe's other end portion
an air valve that is provided on the other end portion of the air supply pipe and that is configured to open/close with respect to outside air; and
a liquid storage section that is provided in the liquid lifting pipe at a position between the liquid delivery port and the branching section, positioned below the branching section and configured to store a predetermined amount of liquid,
wherein the branching section is provided at a position that is higher than the height of the liquid surface in the liquid lifting tank and lower than the potential liquid lifting height of the air pump, the method comprising:
a first step of driving the air pump, lifting the liquid in the liquid lifting tank up to a position higher than the branching section in the liquid lifting pipe, and storing the liquid in the liquid storage section;
a second step of stopping the air pump and opening the air valve, introducing an air layer into the branching section via the air supply pipe, and dividing the liquid in the liquid lifting pipe by the air layer into liquid in the liquid storage section and liquid on a side of the tank relative to the branching section; and
a third step of driving the air pump and closing the air valve, and sending the liquid in the liquid lifting tank out to the liquid lifting pipe so that the liquid in the liquid storage section is pushed upward by the air layer to be discharged through the liquid delivery port of the liquid lifting pipe.

6. The liquid lifting method according to claim 5 ,
wherein a volume of the air layer that is provided in the second step is larger than a product of a cross-sectional area of the liquid lifting pipe and a value obtained by subtracting the potential liquid lifting height of the air pump from a difference in height between the liquid delivery port of the liquid lifting pipe and the liquid surface in the liquid lifting tank.

Assignees

• Murata Manufacturing Co

Inventors

• Tanaka Nobuhira

Classifications

• F04F1/06 Primary

  the fluid medium acting on the surface of the liquid to be pumped (F04F1/02 takes precedence) · CPC title

• F04B23/028

  the pump being mounted on top of the reservoir · CPC title

• F04D17/10

  for compressing or evacuating · CPC title

• F04D13/16

  with storage reservoirs · CPC title

• F04D33/00

  Non-positive-displacement pumps with other than pure rotation, e.g. of oscillating type (F04D35/00 takes precedence; hand-held fans A45B) · CPC title