JP4672450B2 - Liquid pumping device - Google Patents

Description

  The present invention relates to a liquid pumping device that pumps liquid such as hot water or fuel with high-pressure working steam. The liquid pressure feeding device of the present invention is particularly suitable as a device for sending condensate generated in various steam using devices to a boiler or a waste heat utilization site.

  The conventional liquid pumping device is provided with an air supply and exhaust port for working steam and an inlet and a pumping port for pumping liquid in the sealed container, and the inlet allows the flow of liquid only to the sealed container. Connected to the inflow pipe that communicates with the pumped liquid generation source through the valve, and the pumping port is connected to the liquid pumping destination through the pumping-side check valve that allows only the liquid flow to the liquid pumping destination. Is connected to the high-pressure working steam source, the exhaust port is connected to the inflow pipe through the exhaust pipe, and when the liquid level in the sealed container reaches a predetermined high level, the air supply port is opened and the exhaust port is closed. When the working vapor is supplied into the sealed container, the liquid in the sealed container is pumped from the pumping port to the liquid pumping destination, and when the liquid level in the sealed container reaches a predetermined low level, the air supply port is closed and exhausted. Until the mouth is opened and the liquid level in the sealed container reaches a predetermined high level, In which dynamic vapor liquid pumping liquid generation source side while being evacuated to pumping liquid generation source side flows into the sealed container through the inlet from the outlet.

In the conventional liquid pumping device, when the inlet is provided below a predetermined high level in the sealed container in which the air supply port is opened and the exhaust port is closed, the liquid level in the sealed container is changed from the liquid level in the inflow pipe. There was a problem that it took time to rise to a predetermined high level. That is, after the liquid level in the sealed container rises to the liquid level in the inflow pipe, the liquid level in the sealed container rises due to condensation of the working steam in the sealed container, but the steam in the inflow pipe is exhausted. This is because it takes time for the liquid level in the sealed container to rise to a predetermined high level because it is supplied into the sealed container through the pipe.
JP-A-2005-36900

  The problem to be solved is to quickly raise the liquid level in the sealed container to a predetermined high level even if an inlet is provided below the predetermined high level in the sealed container where the air supply port is opened and the exhaust port is closed. It is to provide a liquid pumping device capable of performing the above.

  According to the present invention, the airtight inlet is provided with a supply port and an exhaust port for the working steam and an inlet and a pressure inlet for the pumping liquid, and the inlet is provided with an inflow check valve that allows only the liquid to flow into the sealed container. Connected to an inflow pipe that communicates with the source for generating liquid to be pumped, and the pumping port is connected to the liquid pumping destination through a pumping-side check valve that allows only the flow of liquid to the liquid pumping destination. Connected to the working steam source, the exhaust port is connected to the inflow pipe via the exhaust pipe, and when the liquid level in the sealed container reaches a predetermined high level, the air supply port is opened and the exhaust port is closed to close the inside of the sealed container When the working steam is supplied to the liquid, the liquid in the sealed container is pumped from the pumping port to the liquid pumping destination, and when the liquid level in the sealed container reaches a predetermined low level, the air supply port is closed and the exhaust port is opened. Until the liquid level in the sealed container reaches a predetermined level. Exhaust gas that allows only the flow of fluid to the inflow pipe in the exhaust pipe in the liquid pressure feeding device in which the liquid on the side of the pressure feed liquid generation source is exhausted from the mouth to the pressure feed liquid generation source side and the liquid on the pressure feed liquid generation source side flows into the sealed container A side check valve is provided.

  In the present invention, by providing an exhaust side check valve that allows only the flow of fluid to the inflow pipe in the exhaust pipe, the liquid level in the sealed container can be quickly raised to a predetermined high level. The excellent effect that it can be raised is produced.

  The present invention is provided with an exhaust-side check valve that allows only the flow of fluid to the inflow pipe in the exhaust pipe. Therefore, after the liquid level in the sealed container rises to the liquid level in the inflow pipe, when the working vapor in the sealed container is condensed, the liquid in the inflow pipe flows into the sealed container from the inlet. Therefore, even if an inflow port is provided below a predetermined high level in the sealed container in which the air supply port is opened and the exhaust port is closed, the liquid level in the sealed container can be quickly raised to a predetermined high level.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The liquid pumping device 24 of the present invention forms a sealed container with a main body 1 and a lid 2, and an operating steam supply port 6, an exhaust port 7, and a pumping liquid inlet 8 are provided on the lid 2. The pressure feed port 9 is provided.

  The inflow port 8 is connected to an inflow pipe 21 that communicates with a heat exchanger 25 as a pressure-feeding liquid generation source via an inflow side check valve 20 that allows only the flow of liquid to the sealed container. The exhaust port 7 is connected to an exhaust pipe 23 communicating with the inflow pipe 21 via an exhaust-side check valve 26 that allows only a fluid flow to the inflow pipe 21. The pressure feed port 9 is connected to a pressure feed pipe 30 communicating with a boiler 29 as a liquid pressure feed destination via a pressure feed side check valve 22 that allows only a liquid flow to the liquid pressure feed destination. The air supply port 6 is connected to an air supply pipe 32 communicating with a steam pipe 31 as a high-pressure working steam source.

  In a state where the liquid level in the sealed container is low, the air supply port 6 is closed and the exhaust port 7 is opened. The working steam in the sealed container is exhausted from the exhaust port 7 to the inflow pipe 21 through the exhaust side check valve 26, and the condensate generated in the heat exchanger 25 is returned from the inflow pipe 21 to the inflow side. It flows into the sealed container from the inlet 8 through the stop valve 20, and the liquid level in the sealed container rises to the liquid level in the inflow pipe 21. Thereafter, condensate generated in the heat exchanger 25 due to condensation of the working steam in the sealed container flows into the sealed container from the inlet 8 through the inflow pipe 21 via the inflow side check valve 20, The liquid level reaches a predetermined high level.

  When the liquid level in the airtight container reaches a predetermined high level, the air supply port 6 is opened and the air exhaust port 7 is closed. The operating steam supplied from the air supply port 6 into the airtight container causes the recovery in the airtight container. Water is pumped from the pumping port 30 to the boiler 29 through the pumping side check valve 22 from the pumping port 9. When the liquid level in the hermetic container decreases and reaches a predetermined low level as the liquid is pumped, the air supply port 6 is closed and the exhaust port 7 is opened.

The block diagram of the liquid pumping apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 6 Air supply port 7 Exhaust port 8 Inflow port 9 Pressure feed port 20 Inflow side check valve 21 Inflow pipe 22 Pressure feed side check valve 23 Exhaust pipe 24 Liquid pressure feeder 25 Heat exchanger 26 Exhaust side check valve 29 Boiler 30 Pressure feed pipe 31 Steam pipe 32 Supply pipe

Claims (1)

Pumped liquid is generated via an inflow check valve that allows only air to flow into the sealed container. Connected to the inlet pipe connected to the source, the pumping port is connected to the liquid pumping destination through a pressure check valve that allows only the liquid flow to the liquid pumping destination, and the air supply port is connected to the high-pressure working steam source. Connected, the exhaust port is connected to the inflow pipe via the exhaust pipe, and when the liquid level in the sealed container reaches a predetermined high level, the air supply port is opened and the exhaust port is closed so that the working steam is generated in the sealed container. By being supplied, the liquid in the sealed container is pumped from the pumping port to the liquid pumping destination, and when the liquid level in the sealed container reaches a predetermined low level, the air supply port is closed and the exhaust port is opened. Until the liquid level in the inside reaches a predetermined high level, Exhaust-side check that allows only the flow of fluid to the inflow pipe in the exhaust pipe in a liquid pressure-feeding apparatus in which the liquid on the side of the liquid generation source is exhausted and the liquid on the side of the pressure-feeding liquid generation source flows into the sealed container from the inflow port A liquid pumping device comprising a valve.

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