JP2010024902A - Liquid pressure feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid pressure feeder preventing noise and vibration when a flush steam of condensed water flowing through a drain pipe is mixed with liquid flowing through a conveying pipe. <P>SOLUTION: An air inlet 6 and an air outlet 7 for working steam and an inlet 8 and an outlet 9 for force feed liquid are provided in the liquid pressure feeder 24. An inflow pipe 21 is connected to the inlet 8, the conveying pipe 25 is connected to the outlet 9, an air supply pipe 26 is connected to the air inlet 6, and an exhaust pipe 23 is connected to the air outlet 7. The drain pipe 27 is branched off from the air supply pipe 26 and connected to the conveying pipe 25. A steam trap 28 and a discharge side check valve 29 allowing only a flow of condensed water to the conveying pipe 25 are arranged on the drain pipe 27. A mixing chamber 30 of the flush steam of the condensed water flowing through the drain pipe 27 and the liquid flowing through the conveying pipe 25 is formed on a connection part of the drain pipe 27 and the conveying pipe 25, and a nozzle part 32 injecting the flush steam into the mixing chamber 30 and a suction opening 34 sucking in the liquid by the flush stem injected from the nozzle part 32 are provided on a trailing end of the drain pipe 27. <P>COPYRIGHT: (C)2010,JPO&INPIT

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.

  As a conventional liquid pumping apparatus, for example, the one shown in Japanese Patent Laid-Open No. 8-145290 has been used. As shown in FIG. 2, the main body 1 and the lid 2 constitute a sealed container, and the float 3, the float valve 4 and the snap mechanism portion 5 are arranged in the sealed container, and the working steam is supplied to the lid 2. The inlet 6 and the outlet 7 and the inlet 8 and the outlet 9 of the pumping liquid are provided, and the inlet 8 is pumped via an inflow check valve 20 that allows only the liquid to flow into the sealed container. A liquid pumping destination (not shown) is connected to an inflow pipe 21 communicating with a liquid generating source (not shown), and the pumping port 9 allows only the flow of liquid to the liquid pumping destination through a pumping-side check valve 22. ) Is connected to a pressure feed pipe 25 communicating with the pressure supply pipe 26, the air supply port 6 is connected to a supply pipe 26 communicating with a high-pressure working steam source (not shown), and the exhaust port 7 is connected to the pressure feed liquid generation source side (not shown). Is connected to an exhaust pipe 23 communicating with. A drain pipe 27 for discharging the condensate generated in the air supply pipe 26 is branched from the air supply pipe 26 and connected to the pressure feed pipe 25. A steam trap 28 that discharges condensate is disposed in the drain pipe 27, and a discharge-side check valve 29 that allows only the flow of condensate to the pressure feed pipe 25 is disposed downstream of the steam trap 28.

  The float 3 floats up and down around the fulcrum 10 as the center of rotation, moves the float valve 4 of the double valve mechanism up and down to cut off the communication of the pressure feed port 9, and moves the first lever 11 up and down around the fulcrum 12. It is to be displaced. Similarly, a second lever 13 is disposed so as to be rotatable about the fulcrum 12, and a compressed coil spring 14 is attached between the end of the second lever 13 and the end of the first lever 11. The operation rod 15 is connected to the upper part of the second lever 13. A spherical exhaust valve body 16 that opens and closes the exhaust port 7 is attached to the upper portion of the operation rod 15, and an operation lever 17 is fixed to the middle portion of the operation rod 15. An air supply rod 18 is arranged above the operation lever 17 so as to be movable up and down, and a spherical air supply valve body 19 is arranged in a free state further above the air supply rod 18.

  FIG. 2 shows a state where the liquid level in the sealed container is low and the float 3 is located at the bottom. The float valve 4 is closed to shut off the inside of the sealed container and the pressure feed port 9, the air supply valve body 19 closes the air supply port 6, and the exhaust valve body 16 opens the exhaust port 7. The working vapor in the hermetic container is exhausted from the exhaust port 7 through the exhaust pipe 23 to the pumping liquid generation source side, and the liquid at the pumping liquid generation source side is discharged from the inlet pipe 21 through the inlet check valve 20 from the inlet 8. It flows into the sealed container. As the liquid level in the sealed container rises, the float 3 rises and the float valve 4 opens. When the liquid level in the sealed container reaches a predetermined high level, the snap mechanism portion 5 snaps and the air supply valve body 19 opens the air supply port 6 and the exhaust valve body 16 closes the exhaust port 7, and the air supply pipe The liquid in the sealed container is pumped from the pumping port 9 to the liquid pumping destination through the pumping side check valve 22 to the liquid pumping destination by the working vapor supplied from the air supply port 6 into the sealed container through 26. When the float 3 descends as the liquid is pumped and the liquid level in the sealed container reaches a predetermined low level, the float valve 4 closes, and the snap mechanism 5 snaps to the opposite side to supply the air supply valve body 19. Closes the air supply port 6 and the exhaust valve body 16 opens the exhaust port 7.

The conventional liquid pumping apparatus has a problem that noise and vibration are generated when the condensate flush vapor flowing through the drain pipe 27 is mixed with the liquid flowing through the pump pipe 25.
JP-A-8-145290

  Accordingly, an object of the present invention is to provide a liquid pumping device that does not generate noise or vibration when the condensate flush vapor flowing through the drain pipe is mixed with the liquid flowing through the pump pipe.

  The technical means of the present invention devised to solve the above-described problems is that a closed container is provided with a supply port and an exhaust port for working steam and an inlet and a pumping port for pressurized liquid, and the inlet is connected to the sealed container. Via an inflow side check valve that allows only the flow of liquid, it is connected to an inflow pipe that communicates with the source of pressure liquid supply, and through a pressure side check valve that allows only the flow of liquid to the liquid pumping destination. Connected to a pumping pipe communicating with the liquid pumping destination, an air supply port connected to an air supply pipe communicating with a high-pressure working steam source, an exhaust port connected to an exhaust pipe communicating with the pumping liquid generating source side, and a sealed container When the liquid level in the inside reaches a predetermined high level, the air supply port is opened and the exhaust port is closed, and the working vapor is supplied into the sealed container, so that the liquid in the sealed container is transferred from the pressure feed port to the liquid pressure destination. When the liquid level in the sealed container reaches a predetermined low level, the air supply port is closed. At the same time, until the exhaust port is opened and the liquid level in the sealed container reaches a predetermined high level, the working vapor in the sealed container is exhausted from the exhaust port to the pressurized liquid generation source side, and the liquid on the pressurized liquid generation source side is discharged from the inflow port. A liquid pressure feeding device that flows into a sealed container, a drain pipe that discharges the condensate generated in the air supply pipe is branched from the air supply pipe, connected to the pressure feed pipe, and a steam trap that discharges the condensate to the drain pipe And a discharge check valve that allows only the condensate flow to the pressure feed pipe downstream of the steam trap, and the condensate flush steam that flows through the drain pipe at the connection between the drain pipe and the pressure feed pipe. A mixing chamber with the liquid flowing through the pressure feed pipe is formed, and a nozzle part for injecting flash vapor into the mixing chamber at the end of the drain pipe, and a suction port for sucking liquid with the flash vapor injected from the nozzle part are provided. A liquid pumping device for.

  The liquid pumping device according to the present invention is capable of generating noise and vibration because the liquid is sucked from the suction port into the flash vapor ejected from the nozzle portion in the mixing chamber to which the drain pipe and the pumping pipe are connected, and quickly and uniformly mixed. This produces an excellent effect that it does not occur.

  The liquid pumping device of the present invention forms a mixing chamber of the condensate flush vapor flowing through the drainage pipe and the liquid flowing through the pumping pipe at the connection between the drainage pipe and the pumping pipe, and the flash steam mixing chamber at the end of the drainage pipe And a suction port through which liquid is sucked by flash vapor ejected from the nozzle portion. Therefore, in the mixing chamber where the drain pipe and the pressure feed pipe are connected, the liquid is sucked from the suction port into the flash vapor sprayed from the nozzle portion, and quickly and uniformly mixed. Therefore, no noise or vibration is generated when the condensate flush steam flowing through the drain pipe is mixed with the liquid flowing through the pressure feed pipe.

  An embodiment of the present invention will be described with reference to FIG. Since the liquid pumping device 24 of the present invention has the same internal structure as that of the conventional example shown in FIG. 2, it is shown in an external view, and the same constituent elements are denoted by the same reference numerals. The liquid pumping device 24 forms a sealed container with the main body 1 and the lid 2, and the lid 2 is provided with a supply port 6 and an exhaust port 7 for working steam, and an inlet 8 and a pumping port 9 for pumping liquid. The inflow port 8 is connected to an inflow pipe 21 that communicates with a pumped liquid generation source via an inflow side check valve 20 that allows only the flow of liquid to the sealed container. The pressure feed port 9 is connected to a pressure feed pipe 25 communicating with the liquid pressure feed destination via a pressure feed side check valve 22 that allows only the flow of liquid to the liquid pressure feed destination. The air supply port 6 is connected to an air supply pipe 26 communicating with a high-pressure working steam source. The exhaust port 7 is connected to an exhaust pipe 23 that communicates with the pumped liquid generation source side. A drain pipe 27 for discharging the condensate generated in the air supply pipe 26 is branched from the air supply pipe 26 and connected to the pressure feed pipe 25. A steam trap 28 that discharges condensate is disposed in the drain pipe 27, and a discharge-side check valve 29 that allows only the flow of condensate to the pressure feed pipe 25 is disposed downstream of the steam trap 28. A mixing chamber 30 of the condensate flush steam flowing through the drain pipe 27 and the liquid flowing through the pressure feed pipe 25 is formed in a T-joint 31 at the connection between the drain pipe 27 and the pressure feed pipe 25, and flush steam is supplied to the end of the drain pipe 27. A nozzle member 33 provided with a nozzle portion 32 to be injected into the mixing chamber 30 is screw-coupled to the T joint 31, and a suction member 35 provided with a suction port 34 for sucking liquid by flash vapor injected from the nozzle portion 32 is used as the nozzle member 33. Screw on to.

  In a state where the liquid level in the sealed container is low, the sealed container and the pressure feeding port 9 are shut off, the air supply port 6 is closed, and the exhaust port 7 is opened. The working steam in the hermetic container is exhausted from the exhaust port 7 through the exhaust pipe 23 to the pressurized liquid generation source side, and condensate generated on the pressurized liquid generation source side flows from the inflow pipe 21 through the inflow check valve 20. It flows into the sealed container from the inlet 8. As the liquid level in the sealed container rises, the inside of the sealed container and the pressure feed port 9 are communicated. When the liquid level in the sealed container reaches a predetermined high level, the air supply port 6 is opened and the exhaust port 7 is closed, The condensate in the sealed container is pumped from the pumping port 9 to the liquid pumping destination through the pumping-side check valve 22 by the working steam supplied from the air supply port 6 into the sealed container through the air supply pipe 26. The When the liquid level in the sealed container decreases and reaches a predetermined low level as the liquid is pumped, the inside of the sealed container and the pumping port 9 are shut off, the air supply port 6 is closed, and the exhaust port 7 is opened. Condensate generated in the air supply pipe 26 is discharged to the pressure feed pipe 25 through the drain pipe 27, but liquid is supplied to the flash vapor ejected from the nozzle portion 32 in the mixing chamber 30 to which the drain pipe 27 and the pressure feed pipe 25 are connected. Since it is sucked in from the suction port 34 and quickly and uniformly mixed, no noise or vibration is generated when the condensate flush vapor flowing in the drain pipe 27 is mixed with the liquid flowing in the pressure feed pipe 25.

The block diagram of the liquid pumping apparatus of this invention. Sectional drawing of the liquid pumping apparatus which shows a prior art example.

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 Pressure feed pipe 26 Supply pipe 27 Drain pipe 28 Steam Trap 29 Ejection check valve 30 Mixing chamber 32 Nozzle part 34 Suction port

Claims (1)

Pumped liquid is generated via an inflow check valve that allows only air to flow into the sealed container. Connected to the inflow pipe communicating with the source, the pumping port is connected to the pressure feeding pipe communicating with the liquid pumping destination through the pressure check valve that allows only the liquid flow to the liquid pumping destination, and the air supply port is high pressure The exhaust port is connected to an exhaust pipe that communicates with the working steam source, and the exhaust port is connected to an exhaust pipe that communicates with the pressurized liquid generation source side. When the liquid level in the sealed container reaches a predetermined high level, the intake port is opened. When the exhaust port is closed and working steam 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 the exhaust port is opened so that the liquid level in the sealed container becomes a predetermined high level. Until the pressure is reached, the working vapor in the sealed container is exhausted from the exhaust port to the pressurized liquid generation source side, and the liquid on the pressurized liquid generation source side flows into the sealed container from the inlet, A drain pipe that discharges the generated condensate is branched from the air supply pipe and connected to the pressure feed pipe. A steam trap that discharges the condensate is placed in the drain pipe, and only the condensate flow to the pressure feed pipe is downstream of the steam trap. In the case where a discharge check valve is arranged to allow the discharge, a mixing chamber of the condensate flush vapor flowing through the drainage pipe and the liquid flowing through the pressure feed pipe is formed at the connection between the drainage pipe and the pressure feed pipe. A liquid pumping device comprising: a nozzle portion for injecting flash vapor into the mixing chamber; and a suction port for sucking liquid by the flash vapor ejected from the nozzle portion.

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