JP4372613B2 - Liquid pumping device - Google Patents

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.

  In the conventional liquid pumping device, a float is disposed in a sealed container provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and the liquid level of the liquid accumulated in the sealed container is increased. By operating the snap mechanism with the float buoyancy in accordance with the power, the power transmission shaft snaps to open and close the supply valve body for opening and closing the supply valve port for the working fluid inlet and the exhaust valve port for the working fluid discharge port. Switch the opening and closing of the exhaust valve body, first open the exhaust valve port and close the air supply valve port to allow liquid to flow in from the liquid inlet, then close the exhaust valve port and open the air supply valve port and collect in the sealed container In the liquid pumping device that pumps the liquid from the liquid discharge port, the snap mechanism is engaged with the two grooves provided in the axial direction of the power transmission shaft and the one groove of the power transmission shaft urged by the elastic member. Locking member and movement of power transmission shaft Thus it is intended that in order to release the engagement entry of the locking member consists of an inclined portion provided on at least one of the locking member and the groove.

In the conventional liquid pumping device, since the locking member slides on the inclined portion, when the sliding resistance increases due to wear, foreign matter biting, or the like, the initial height of the liquid accumulated in the sealed container is increased. There was a problem that the power transmission shaft could not be snapped. If the power transmission shaft cannot be snapped, opening / closing of the supply valve body and the exhaust valve body cannot be switched, and liquid cannot be pumped.
JP-A-11-236997

  The problem to be solved is to provide a liquid pumping device capable of snap-moving the power transmission shaft at the initial height of the liquid accumulated in the sealed container.

In the present invention, a float is disposed in a sealed container provided with a working fluid introduction port, a working fluid discharge port, a liquid inflow port, and a liquid discharge port, according to the height of the liquid level of the liquid accumulated in the sealed container. An exhaust valve body that opens and closes an air supply valve body that opens and closes an air supply valve port of a working fluid introduction port and an exhaust valve port of a working fluid discharge port that operates a snap mechanism by buoyancy of the float and snaps the power transmission shaft. When the liquid level in the sealed container is low, the exhaust valve body opens the exhaust valve port, the supply valve body closes the supply valve port, and the liquid flows in from the liquid inlet . the liquid pumping apparatus for pumping fluid exhaust valve body is air-supply valve member closes the exhaust valve port is accumulated in a closed vessel by opening the intake valve port in the liquid level is high from the liquid discharge port, the snap mechanism is powered A magnet fixed to the transmission shaft and an upper part of the magnet And the magnetic body on upward displacement of is prohibited is, a lower magnetic member downward displacement is located below the magnet is prohibited, it is disposed between the upper magnetic member and the lower magnetic above power transmission shaft Alternatively, the elastic member is compressed and deformed in accordance with the downward displacement, and is disposed between the upper magnetic body and the lower magnetic body, and is displaced upward or downward, and the lower magnetic body is displaced by a predetermined amount or more below the upper magnetic body. And a restricting member that prohibits a predetermined amount of displacement upward.

  Since the power transmission shaft can be snap-moved at the initial height of the liquid accumulated in the sealed container, the present invention is excellent in that the liquid can be reliably pumped by switching between the opening and closing of the supply valve body and the exhaust valve body. Produces an effect.

  In the liquid pumping apparatus of the present invention, when the liquid level in the sealed container rises, the float rises and displaces the power transmission shaft upward. At this time, the magnetic coupling force between the magnet and the lower magnetic body causes the elastic member to compress and deform along with the upward displacement of the power transmission shaft, while the lower magnetic body and the regulating member are displaced upward, and the upper end of the regulating member Is in contact with the upper magnetic body, and the buoyancy of the float is further increased, and then the elastic member suddenly recovers the deformation and displaces the lower magnetic body downward to weaken the magnetic coupling force between the magnet and the lower magnetic body, The power transmission shaft snaps upward due to the magnetic coupling force between the magnet and the upper magnetic body. Further, when the liquid level in the sealed container is lowered, the float is lowered and the power transmission shaft is displaced downward. At this time, the magnetic coupling force between the magnet and the upper magnetic body causes the upper magnetic body to move downward while the elastic member is compressed and deformed in accordance with the downward displacement of the power transmission shaft, and the lower end of the upper magnetic body is restricted. After contacting the upper end of the member and further reducing the buoyancy of the float, the elastic member suddenly recovers its deformation and displaces the upper magnetic body upward to weaken the magnetic coupling force between the magnet and the upper magnetic body. The power transmission shaft snaps downward by the magnetic coupling force of the lower magnetic body. Thus, since the power transmission shaft is snap-moved by the magnetic coupling force between the magnet and the magnetic body, the sliding resistance does not increase at the snap mechanism portion. Therefore, the power transmission shaft can be snap-moved at the initial height of the liquid accumulated in the sealed container. Moreover, the force at the time of snap movement can be increased by adding the deformation recovery force of the elastic member when the power transmission shaft is snap-moved.

  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). A working fluid discharge port 5, a liquid inflow port 6, and a liquid discharge port 7 are formed in the lid 3, and a working fluid introduction port 9 is formed in a valve case 8 that is coupled to the lid 3 by screws (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.

  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. The external piping of the liquid pumping device 1 has a working fluid inlet 9 connected to a high-pressure vapor source, a working fluid outlet 5 connected to the liquid generation source side, and a liquid inlet 6 opening from the outside toward the sealed container 4. It is connected to a liquid generation source via an inflow check valve (not shown), and is connected to a liquid pressure destination via a discharge check valve (not shown) that opens from the sealed container 4 to the outside.

  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 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 rapidly recovers from the deformation and displaces the lower magnetic body 30 downward, thereby The power transmission shaft 11 snaps upward by the magnetic coupling force between the magnet 27 and the upper magnetic body 28 as well as 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 introduction port 9, and the pressure in the sealed container 4 rises and enters the sealed container 4. The accumulated liquid is pushed by the vapor pressure and is pumped from the liquid discharge port 7 to the liquid pumping destination.

  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.

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. 1.

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

Claims (1)

A float is placed in a sealed container provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and the float buoyancy according to the liquid level of the liquid accumulated in the sealed container By switching the power transmission shaft by operating the snap mechanism, the supply valve body that opens and closes the supply valve port of the working fluid inlet and the exhaust valve body that opens and closes the exhaust valve port of the working fluid discharge port are switched. When the liquid level in the sealed container is low, the exhaust valve body opens the exhaust valve port, the supply valve body closes the supply valve port, and the liquid flows in from the liquid inlet, so that the liquid level in the sealed container is high. the liquid pumping apparatus exhaust valve member in the state is to pump air supply valve member to close the exhaust valve port is accumulated in a closed vessel by opening the intake valve port liquid from the liquid outlet, the snap mechanism is fixed to the power transmission shaft Placed above the magnet and above the magnet And the magnetic body on which the displacement is inhibited, and a lower magnetic body downward displacement is located below the magnet is prohibited, it is disposed between the upper magnetic member and the lower magnetic upward or downward of the power transmission shaft The elastic member is compressed and deformed in accordance with the displacement of the upper magnetic body and is disposed between the upper magnetic body and the lower magnetic body, and is displaced upward or downward, and at least a predetermined displacement below the upper magnetic body and upward of the lower magnetic body. And a restricting member that prohibits a predetermined displacement or more.

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