JP2005325775A - Liquid force feed device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost and labor for arranging a liquid force feed device. <P>SOLUTION: In this liquid force feed device 1, a sealed vessel 4 is provided with a hydraulic fluid introducing port 9, a hydraulic fluid discharge port 5, a liquid inflow port 6 and a liquid discharge port 7; opening-closing of an air supply valve element 22 for opening and closing an air supply valve port 20 of the hydraulic fluid introducing port 9 and an exhaust valve element 19 for opening and closing an exhaust valve port 21 of the hydraulic fluid discharge port 5, is switched in response to the height of a liquid level of liquid gathered in the sealed vessel 4; the liquid is made to flow in from the liquid inflow port 6 by closing the air supply valve port 20 by opening the exhaust valve port 21 in the beginning; and the liquid gathered in the sealed vessel 4 is forcibly fed from the liquid discharge port 7 by opening the air supply valve port 20 by closing the exhaust valve port 21 in the next place. The liquid force feed device is constituted so that an inflow side check valve port 33 of the liquid inflow port 6 is arranged in the sealed vessel 4, and an inflow side check valve element 34 is arranged in the sealed vessel 4 for opening the inflow side check valve port 33 toward the inside of the sealed vessel 4, and a communicating passage 35 is arranged in the sealed vessel 4 for connecting the hydraulic fluid discharge port 5 to the liquid inflow port 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid pumping device that pumps liquid such as hot water or fuel. 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 a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet in a sealed container, and the working fluid is introduced according to the height of the liquid level of the liquid accumulated in the sealed container. Switch between opening and closing the supply valve body that opens and closes the intake valve opening and the exhaust valve opening that opens and closes the exhaust valve opening of the working fluid discharge opening, opens the exhaust valve opening first, closes the supply valve opening, In a liquid pumping device that allows liquid to flow in from an inlet, then closes the exhaust valve port and opens the air supply valve port to pump liquid accumulated in the sealed container from the liquid discharge port, the inlet check valve port on the inflow side of the liquid inlet port An inflow side check valve body that is provided in a sealed container and opens the inflow side check valve port toward the inside of the sealed container is disposed in the sealed container, and the working fluid discharge port is connected to the liquid source side via an external pipe. Is connected to.

The conventional liquid pumping device requires an external pipe for connecting the working fluid discharge port to the liquid source side. Therefore, there is a problem that the cost and labor are large because the liquid pumping device is installed.
Japanese Patent Publication No. 48-27648

  The problem to be solved is to provide a liquid pumping device that can reduce cost and labor for installing the liquid pumping device.

  According to the present invention, a closed container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and the working fluid inlet is supplied according to the level of the liquid level accumulated in the sealed container. Switch between opening and closing the supply valve body that opens and closes the air valve port and the exhaust valve body that opens and closes the exhaust valve port of the working fluid discharge port, opens the exhaust valve port first, closes the supply valve port, and liquid from the liquid inlet In a liquid pumping device that closes the exhaust valve port, then opens the air supply valve port and pumps the liquid accumulated in the sealed container from the liquid discharge port, the inlet check valve port of the liquid inlet is placed in the sealed container. The inflow side check valve body that opens the inflow side check valve port toward the inside of the sealed container is disposed in the sealed container, and the communication path that connects the working fluid discharge port to the liquid inlet is provided in the sealed container. It is provided.

  The present invention provides an excellent effect that the cost and labor can be reduced because the liquid pressure feeding device is installed by providing the closed container with a communication path that connects the working fluid discharge port to the liquid inflow port.

  In the present invention, an inflow check valve opening for an inflow side of a liquid inlet is provided in a sealed container, and an inflow check valve body that opens the inflow check valve opening toward the inner side of the sealed container is disposed in the sealed container. The communication container connecting the working fluid discharge port to the liquid inflow port is provided in the sealed container. That is, since the working fluid discharge port and the liquid inflow port are connected by a communication path provided in the sealed container, no separate external piping is required. Therefore, the cost and labor can be reduced because the liquid pumping device is installed.

  An embodiment showing a specific example of the above technical means will be described. 1 is a sectional view of a liquid pumping apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a snap mechanism portion of FIG. 1, and FIG. 3 is an enlarged sectional view of a supply valve body portion and an exhaust valve body portion of FIG. It is. In the liquid pumping apparatus 1 of the present embodiment, a sealed container 4 is constituted by a main body 2 and a lid 3 which are coupled by screws (not shown). The lid 3 is formed with a working fluid discharge port 5, a liquid inlet 6 and a liquid outlet 7 indicated by a one-dot chain line, and a working fluid inlet 9 is formed in a valve case 8 coupled to the lid 3 by a screw (not shown).

  A float 10 and a power transmission shaft 11 are disposed in the sealed container 4. The upper end of the power transmission shaft 11 protrudes upward from the lid 3 and is located in a cap 12 coupled to the lid 3 by a screw (not shown). The float 10 is supported by a bracket 15 via a float arm 13 and a swing shaft 14. The bracket 15 is composed of two plates on the front side and the other side, and is coupled to the lid 3 by screws (not shown), and the swing shaft 14 is stretched over. The float arm 13 is made by bending a plate into a U-shape, and the two plates face each other in parallel, and the float 10 is coupled to the left end. A hole 16 is provided in the float arm 13, a shaft 17 having a smaller diameter than the hole 16 is spanned in the hole 16, and the lower end of the power transmission shaft 11 is connected to the shaft 17. The float 3 swings up and down around the swing shaft 14, and after a predetermined amount of swing, the power transmission shaft 11 is displaced up and down.

  A connecting plate 18 is connected to substantially the middle of the power transmission shaft 11, and an exhaust valve body 19 is connected to the connecting plate 18. The exhaust valve body 19 has a substantially cylindrical shape, and a small diameter operation rod is integrally formed at the upper end. The upper half of the cylindrical portion of the exhaust valve body 19 is located in the valve case 8. In the valve case 8, an air supply valve port 20 for the working fluid introduction port 9 is formed in the upper part, and an exhaust valve port 21 for the working fluid discharge port 5 is formed on the side below the air supply valve port 20. The exhaust valve port 21 is opened and closed on the side surface of the exhaust valve body 19. A spherical air supply valve body 22 for opening and closing the air supply valve opening 20 is arranged on the side of the working fluid introduction port 9 of the air supply valve opening 20, and the air supply valve body 22 is opened by an operation rod of the exhaust valve body 19. The A barrier member 23 that suppresses the exhaust valve body 19 from being pushed back downward by the working fluid from the air supply valve port 20 is fixed to the inside of the sealed container 4 below the air supply valve port 20 by a snap ring 24. The barrier member 23 has an oval shape, and a flow path through which the working fluid from the air supply valve port 20 flows toward the inner side of the sealed container 4 is formed on the front side and the other side, and the operation rod of the exhaust valve body 19 passes through the center. A hole is provided in the center.

  A snap mechanism 25 is disposed in the cap 12. The snap mechanism 25 is a ring-shaped magnet 27 fixed to the upper portion of the power transmission shaft 11 with a snap ring 26 and a ring-shaped magnet that is disposed above the magnet 27 and is prevented from being displaced upward at the stepped portion of the cap 12. An upper magnetic body 28, a ring-shaped lower magnetic body 30 disposed below the magnet 26 and prohibited from being displaced downward by a snap ring 29 fixed to the cap 12, and the upper magnetic body 28 and the lower magnetic body 30 Between the upper magnetic body 28 and the lower magnetic body 30 and a predetermined displacement above the lower magnetic body 30 and a predetermined upward movement of the lower magnetic body 30. The ring-shaped restricting member 32 prohibits the above displacement.

  An inflow side check valve port 33 is formed at the end of the liquid inlet 6 on the side of the sealed container 4, and an inflow side check valve body 34 that opens the inflow side check valve port 33 toward the inside of the sealed container 4 is a sealed container. 4 is arranged. A communication path 35 that connects the working fluid outlet 5 to the liquid inlet 6 is formed in the lid 3. The inflow side check valve body 34 is fixed to one end of the connecting shaft 40 with a nut 38. A guide member 37 is fixed to the other end of the connecting shaft 40 with a nut 39. The connecting shaft 40 is guided in the axial direction on the outer periphery of the guide member 37 and the inner periphery of the plurality of ribs 41.

  Next, the operation of the liquid pumping apparatus 1 of this embodiment will be described by following a series of operation procedures when steam is used as the working fluid. In the external piping of the liquid pumping apparatus 1, the working fluid inlet 9 is connected to a high-pressure vapor source, the liquid inlet 6 is connected to a liquid generating source, and the liquid outlet 7 is connected to a liquid pumping destination. A discharge-side check valve (not shown) that opens outward from the sealed container 4 is disposed on the inner side of the sealed container 4 or on the outer side of the sealed container 4.

  In a state where the liquid level in the sealed container 4 is low, the float 10 is located at the bottom, and the power transmission shaft 11 is displaced downward. At this time, the supply valve body 22 closes the supply valve port 20, and the exhaust valve body 19 opens the exhaust valve port 21. The inflow side check valve body 34 opens the inflow side check valve port 33 and the outflow side check valve is closed. The liquid on the liquid source side flows down from the liquid inlet 6 into the sealed container 4 and accumulates. When the float 10 floats due to the liquid accumulated in the sealed container 4, the float arm 13 rotates clockwise about the swing shaft 14, and the lower end of the hole 16 comes into contact with the shaft 17. Displace upward. At this time, the magnetic coupling force between the magnet 27 and the lower magnetic body 30 causes the lower magnetic body 30 and the regulating member 32 to be displaced upward while compressing and deforming the elastic member 31 in accordance with the upward displacement of the power transmission shaft 11. Then, after the upper end of the restricting member 32 comes into contact with the lower end of the upper magnetic body 28 and the buoyancy of the float 10 further increases, the elastic member 31 suddenly recovers from the deformation and displaces the lower magnetic body 30 downward to magnet. The power transmission shaft 11 snaps upward by the magnetic coupling force between the magnet 27 and the upper magnetic body 28 while weakening the magnetic coupling force between the lower magnetic body 30 and the lower magnetic body 30. With the snap movement of the power transmission shaft 11, the exhaust valve body 19 connected to the power transmission shaft 11 via the connecting plate 18 snaps upward, the exhaust valve port 21 is closed, and the exhaust valve body 19 is closed. During the upward snap movement, the air supply valve body 22 snaps upward with the operating rod of the exhaust valve body 19 and the air supply valve port 20 is opened.

  When the exhaust valve port 21 is closed and the air supply valve port 20 is opened, high-pressure steam is introduced into the sealed container 4 from the working fluid inlet 9 and the pressure in the sealed container 4 increases. As a result, the inflow side check valve port 33 is closed, the outflow side check valve is opened, and the liquid accumulated in the sealed container 4 is pushed by the vapor pressure and is pumped from the liquid discharge port 7 to the liquid pumping destination. The

  When the liquid level in the sealed container 4 decreases due to the liquid discharge, the float 10 descends, the float arm 13 rotates counterclockwise about the swing shaft 14, and the upper end of the hole 16 contacts the shaft 17. After the contact, the power transmission shaft 11 is displaced downward. At this time, due to the magnetic coupling force between the magnet 27 and the upper magnetic body 28, the upper magnetic body 28 is displaced downward while the elastic member 31 is compressed and deformed along with the downward displacement of the power transmission shaft 11. After the lower end of the body 28 comes into contact with the upper end of the restricting member 32 and the buoyancy of the float 10 further decreases, the elastic member 31 suddenly recovers from deformation and displaces the upper magnetic body 28 upward to displace the magnet 27 and the upper magnetism. While weakening the magnetic coupling force with the body 28, the power transmission shaft 11 snaps downward due to the magnetic coupling force between the magnet 27 and the lower magnetic body 30. With the snap movement of the power transmission shaft 11, the exhaust valve body 19 connected to the power transmission shaft 11 via the connecting plate 18 snaps downward to open the exhaust valve port 21. In the process of the downward snap movement, the air supply valve body 22 snaps downward and the air supply valve port 20 is closed.

  When the exhaust valve port 21 is opened and the air supply valve port 20 is closed, the high-pressure steam in the sealed container 4 is discharged from the working fluid discharge port 5 to the liquid inlet 6 side through the communication path 35, and the sealed container 4. The pressure inside decreases. Thereby, the inflow side check valve port 33 is opened, the outflow side check valve is closed, and the liquid flows into and accumulates in the sealed container 4.

Sectional drawing of the liquid pumping apparatus of the Example of this invention. The expanded sectional view of the snap mechanism part of FIG. FIG. 2 is an enlarged cross-sectional view of an intake valve body portion and an exhaust valve body portion of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid pumping apparatus 2 Main body 3 Cover 4 Sealed container 5 Working fluid discharge port 6 Liquid inlet 7 Liquid discharge port 8 Valve case 9 Working fluid introduction port 10 Float 11 Power transmission shaft 12 Cap 13 Float arm 14 Swing shaft 18 Connecting plate 19 Exhaust valve body 20 Supply valve port 21 Exhaust valve port 22 Exhaust valve body 23 Barrier member 25 Snap mechanism 27 Magnet 28 Upper magnetic body 30 Lower magnetic body 31 Elastic member 32 Restriction member 33 Inflow side check valve port 34 Inflow side reverse Stop valve body 35 Communication passage 37 Guide member 40 Connecting shaft

Claims (1)

The closed container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and the air supply valve port of the working fluid inlet is set according to the liquid level of the liquid accumulated in the sealed container. Switch between opening and closing of the supply valve body that opens and closes and the exhaust valve body that opens and closes the exhaust valve port of the working fluid discharge port, and first opens the exhaust valve port and closes the supply valve port to allow liquid to flow in from the liquid inlet, Next, in the liquid pumping device that closes the exhaust valve port and opens the air supply valve port to pump the liquid accumulated in the sealed container from the liquid discharge port, an inflow check valve port for the liquid inlet is provided in the sealed container. The inflow side check valve body that opens the side check valve port toward the inside of the sealed container is arranged in the sealed container, and the communication path that connects the working fluid discharge port to the liquid inlet is provided in the sealed container. A liquid pumping device.

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