JP4545522B2 - 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 a conventional liquid pumping device, a float is disposed in a sealed container provided with a working fluid introduction port, a working fluid discharge port, a liquid inlet and a liquid discharge port, and a power transmission shaft is connected via a power transmission shaft by raising and lowering the float. The cylindrical member of the snap mechanism that is screwed to is moved to operate the snap mechanism, thereby opening and closing the supply valve body that opens and closes the supply valve port of the working fluid introduction port and the exhaust valve port of the working fluid discharge port Open and close the exhaust valve body abruptly, first open the exhaust valve port and close the air supply valve port to allow liquid to flow in from the liquid inflow port, then close the exhaust valve port and open the air supply valve port and open the airtight container The liquid accumulated in is pumped from the liquid outlet.

Since the conventional liquid pumping device has a valve case that forms an air supply valve port and an exhaust valve port, an air supply valve body, and an exhaust valve body inside a sealed container composed of a main body and a lid. When the case, the air supply valve body, and the exhaust valve body are removed or attached for repair or replacement, there is a problem that the sealed container composed of the main body and the lid must be disassembled.
JP-A-11-236997

  The problem to be solved is to provide a liquid pumping device in which the valve case, the air supply valve body, and the exhaust valve body can be removed and attached without disassembling the sealed container.

  In the present invention, a float is disposed in a closed container provided with a working fluid introduction port, a working fluid discharge port, a liquid inflow port, and a liquid discharge port, and is screwed to the power transmission shaft via the power transmission shaft by raising and lowering the float. An exhaust valve body that opens and closes a supply valve body that opens and closes a supply valve port of a working fluid introduction port and an exhaust valve port of a working fluid discharge port by moving the cylindrical member of the snap mechanism and operating the snap mechanism The exhaust valve opening was first opened and the air supply valve opening was closed to allow liquid to flow in from the liquid inlet, then the exhaust valve opening was closed and the air supply valve opening was opened and collected in a sealed container. In a liquid pumping device that pumps liquid from a liquid discharge port, an air supply valve port and an exhaust valve port are formed in a valve case that is detachably attached to the sealed container from the outside of the sealed container, and the air supply valve body and the exhaust valve are formed in the valve case Accommodates the valve body and snap mechanism, valve The cylindrical member of the snap mechanism is connected to the valve case so as to rotate with the rotation of the casing, and the valve case is rotated from the outside of the sealed container so that the power transmission shaft and the cylindrical member of the snap mechanism are screwed together. It is characterized by releasing.

  The present invention provides a valve case, an air supply valve body, and an exhaust without disassembling the sealed container by rotating the valve case from the outside of the sealed container and screwing and releasing the power transmission shaft and the cylindrical member of the snap mechanism. An excellent effect that the valve body can be removed or attached is produced.

  The liquid pressure feeding device according to the present invention has an air supply valve port and an exhaust valve port formed in a valve case that is detachably attached to the airtight container from the outside of the airtight container, and the air supply valve body, the exhaust valve body, and the snap mechanism in the valve case The cylindrical member of the snap mechanism is connected to the valve case so as to rotate with the rotation of the valve case, and the power transmission shaft and the cylindrical member of the snap mechanism are rotated by rotating the valve case from outside the sealed container. Are to be connected / released with screws. Therefore, the valve case is rotated from the outside of the sealed container, and the power transmission shaft and the cylindrical member of the snap mechanism are screw-coupled / released, so that the valve case, the supply valve body, and the exhaust valve body can be removed without disassembling the sealed container. Can be removed and installed.

  An embodiment showing a specific example of the above technical means will be described. FIG. 1 is a sectional view of a liquid pumping apparatus according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a power transmission shaft and a valve case portion of FIG. 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 detachably attached to the lid 3 from the outside by screws (not shown).

  A float 10 and a power transmission shaft 11 are disposed in the sealed container 4. 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.

  In the valve case 8, an air supply valve port 18 of the working fluid introduction port 9 is formed in the upper part, and an exhaust valve port 19 of the working fluid discharge port 5 is formed in a side below the air supply valve port 18. An exhaust valve body 20 that opens and closes the exhaust valve port 19 is substantially cylindrical, and a small-diameter operation rod 21 is integrally formed at the upper end and is accommodated in the valve case 8. The exhaust valve port 19 is opened and closed on the side surface of the exhaust valve body 20. A spherical air supply valve body 22 for opening and closing the air supply valve port 18 is disposed in the valve case 8 on the side of the working fluid introduction port 9 of the air supply valve port 18, and the air supply valve body 22 is an operation rod of the exhaust valve body 20. The valve is opened at 21. A barrier member 23 that suppresses the exhaust valve body 20 from being pushed back downward by the working fluid from the air supply valve port 18 is fixed to the inside of the sealed container 4 below the air supply valve port 18. The barrier member 23 has an oval shape, and a flow path for allowing the working fluid from the air supply valve port 18 to flow down to the inside of the sealed container 4 is formed on the front side and the other side, and the operation rod 21 of the exhaust valve body 20 passes therethrough. A central hole is provided in the center. The valve case 8 has two left and right openings that communicate with the inside and outside on the side.

  A female screw formed on the lower inner periphery of the cylindrical member 26 forming a part of the snap mechanism 25 is screwed to a male screw formed on the upper outer periphery of the power transmission shaft 11. The cylindrical member 26 is formed with a non-round portion 27 having a hexagonal cross section on the outer periphery, and a rod-like portion 28 extends from the upper end of the non-round portion 27 to the upper part inside the exhaust valve body 20. The snap mechanism 25 is disposed around a cylindrical member 26 in which an inclined portion 29 having a gradually decreasing diameter is formed at the center of the rod-shaped portion 28, and the rod-shaped portion 28 above the cylindrical member 26, and the step portion of the valve case 8 And the retaining ring member 30 fixed to the valve case 8 and holding the exhaust valve body 20, and two upper left and right upper openings opened in the holding member 31. The spherical member 32, the two lower spherical members 33 arranged in the two left and right lower openings opened in the holding member 31, and the two left and right openings opened in the exhaust valve body 20, the upper spherical member 32 or Two left and right locking members 34 located outside the lower spherical member 33, a C-shaped elastic member 35 that biases the locking member 34 inward, and an upper portion of the rod-shaped portion 28 of the cylindrical member 26. Between the formed flange portion and the top wall of the exhaust valve body 20 The coiled upper elastic member 36 and a coiled lower elastic member 37 disposed between the flange portion and the step portion provided on the exhaust valve body 20 are accommodated in the valve case 8. ing.

  The inner periphery of the retaining ring member 30 is formed in a non-round shape corresponding to the non-round portion 27 on the outer periphery of the cylindrical member 26. Thereby, the power transmission shaft 11 and the cylindrical member 26 of the snap mechanism 25 are screw-coupled / released by rotating the valve case 8 from outside the sealed container 4. By forming the inner periphery of the valve case 8 into a non-round shape corresponding to the non-round portion 27 on the outer periphery of the tubular member 26, the valve case 8 rotates with the rotation of the valve case 8 without the retaining ring member 30 interposed. Thus, the cylindrical member 26 of the snap mechanism 25 may be connected to the valve case 8.

  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 and the cylindrical member 26 are displaced downward. At this time, the supply valve body 22 closes the supply valve port 18, and the exhaust valve body 20 opens the exhaust valve port 19. 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 is lifted by 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 contacts the shaft 17. The cylindrical member 26 is displaced upward. In the process in which the power transmission shaft 11 and the cylindrical member 26 are displaced upward, the lower spherical member 33 and the locking member 34 are displaced outward while the elastic member 35 is expanded by the lower portion of the inclined portion 29, and the upper elasticity is increased. The member 36 is compressed and deformed. When the locking member 34 comes out of the lower opening of the holding member 31, the upper elastic member 36 that has been compressed and deformed rapidly recovers from the deformation, and the exhaust valve body 20, the locking member 34, and the elastic member 35 are restored. The exhaust valve port 19 is suddenly closed by snapping upward, and the supply valve body 22 snaps upward by the operation rod 21 of the exhaust valve body 20 in the process of snapping upward of the exhaust valve body 20. Thus, the air supply valve port 18 is rapidly opened. Further, the elastic member 35 pushes the locking member 34 into the upper opening of the holding member 31 and displaces the upper spherical member 32 inward.

  When the exhaust valve port 19 is closed and the air supply valve port 18 is opened, high-pressure steam is introduced from the working fluid introduction port 9 into the sealed container 4, and the pressure in the sealed container 4 rises, 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 and the cylindrical member 26 are displaced downward. In the process in which the power transmission shaft 11 and the cylindrical member 26 are displaced downward, the upper spherical member 32 and the locking member 34 are displaced outward while the elastic member 35 is expanded by the upper portion of the inclined portion 29, and the lower elasticity The member 37 is compressed and deformed. When the locking member 34 comes out of the upper opening of the holding member 31, the compression-deformed lower elastic member 37 rapidly recovers from the deformation, and the exhaust valve body 20, the locking member 34, and the elastic member 35 are restored. The exhaust valve port 19 is suddenly opened by snapping downward, and in the process of snapping the exhaust valve body 20 downward, the air supply valve body 22 snaps downward and the air supply valve port 18 is suddenly moved. Closed. Further, the elastic member 35 pushes the locking member 34 into the lower opening of the holding member 31 and displaces the lower spherical member 33 inward.

Sectional drawing of the liquid pumping apparatus of the Example of this invention. The expanded sectional view of the power transmission shaft and valve case part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid pumping apparatus 2 Main body 3 Lid 4 Sealed container 5 Working fluid discharge port 6 Liquid inflow port 7 Liquid discharge port 8 Valve case 9 Working fluid introduction port 10 Float 11 Power transmission shaft 13 Float arm 14 Swing shaft 18 Supply valve port 19 exhaust valve port 20 exhaust valve body 22 air supply valve body 25 snap mechanism 26 cylindrical member 30 retaining ring member 31 holding member 32 upper spherical member 33 lower spherical member 34 locking member 35 elastic member 36 upper elastic member 37 lower elastic member

Claims (1)

The float is disposed in a closed container provided with a working fluid inlet, a working fluid outlet, a liquid inlet and a liquid outlet, and a snap mechanism of a snap mechanism that is screwed to the power transmission shaft via the power transmission shaft by raising and lowering the float. By moving the cylindrical member and 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 rapidly opened and closed. First, the exhaust valve port is opened and the air supply valve port is closed to allow liquid to flow in from the liquid inlet, and then the exhaust valve port is closed and the air supply valve port is opened to collect the liquid accumulated in the sealed container. In a liquid pumping device that pumps from the outlet, a supply valve port and an exhaust valve port are formed in a valve case that is detachably attached to the sealed container from the outside of the sealed container, and the supply valve body, the exhaust valve body, and the snap are formed in the valve case. The mechanism is housed and the valve case The cylindrical member of the snap mechanism is connected to the valve case so as to rotate with the rotation of the valve, and the power transmission shaft and the cylindrical member of the snap mechanism are screwed together and released by rotating the valve case from outside the sealed container. A liquid pumping device.

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