JP5514065B2 - 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.

A conventional liquid pumping device is disclosed in Patent Document 1, for example. This is because the closed container is provided with a working fluid inlet, a working fluid outlet, a liquid inlet, and a liquid outlet, and the air supplied to the working fluid inlet according to the liquid level of the liquid accumulated in the sealed container. Switching between the supply valve body that opens and closes the valve opening and the opening and closing of the exhaust valve body 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, and supplies liquid from the liquid inlet In the liquid pumping device for inflowing, then closing the exhaust valve port and opening the air supply valve port to pump the liquid accumulated in the sealed container from the liquid discharge port, the lower part for opening the air supply valve body to the air supply valve body The lifting rod is attached integrally, the lower lifting rod is guided up and down by the lower guiding member, the upper lifting rod is integrally attached to the air supply valve body, and the upper lifting rod is guided up and down by the upper guiding member. Is.

JP2008-309285A

In the conventional liquid pumping device, since the lower elevating bar and the upper elevating bar are guided up and down by the lower guide member and the upper guide member, respectively, the supply valve body, the lower elevating bar and the upper elevating bar are difficult to tilt. . However, since the foreign matter in the fluid is easily caught between the lower lifting rod and the lower guide member and between the upper lifting rod and the upper guide member, there is a problem that the air supply valve body is difficult to displace.

Therefore, the problem to be solved by the present invention is to provide a liquid pumping device that can prevent the supply valve body from becoming difficult to displace.

In order to solve the above problems, the liquid pumping device of the present invention is provided with a working fluid introduction port, a working fluid discharge port, a liquid inlet and a liquid discharge port provided in a sealed container, and a liquid liquid accumulated in the sealed container. Switch the opening and closing of 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 according to the height of the surface. In a liquid pumping device that closes the open air supply valve port and allows liquid to flow in from the liquid inlet, then 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. A lower elevating rod for opening the air supply valve body is integrally attached to the air valve body, the lower elevating bar is guided up and down by the lower guide member, and the outer surface of the air supply valve body around the air supply valve body A plurality of ribs in sliding contact with each other, and guide the outer surface of the air supply valve body up and down with the inner surfaces of the plurality of ribs, In which characterized in that a cylindrical filter around the drive.

According to the present invention, the lower elevating rod for opening the air supply valve body is integrally attached to the air supply valve body, the lower elevating bar is guided up and down by the lower guide member, and the periphery of the air supply valve body A plurality of ribs with which the outer surface of the air supply valve body is slidably contacted, the outer surface of the air supply valve body is guided up and down by the inner surfaces of the plurality of ribs, and a cylindrical filter is provided around the ribs, thereby Is guided up and down by the lower guide member and becomes difficult to tilt, and the air supply valve body is guided up and down by the inner surface of the plurality of ribs to make it difficult to tilt, and the foreign matter in the fluid is captured by the cylindrical filter and the lower lifting rod There is an excellent effect that foreign matter in the fluid is difficult to be caught between the lower guide member and the air supply valve body and the rib, and the air supply valve body can be prevented from being displaced easily.

It is sectional drawing of the liquid pumping apparatus concerning embodiment of this invention. It is an expanded sectional view of the valve closing state of the air supply valve of FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. The liquid pumping apparatus 1 according to the present embodiment has a float 3, a switching valve 4, and a snap mechanism 5 arranged in a sealed container 2. The sealed container 2 has a main body portion 7 and a lid portion 8 connected by screws (not shown), and a liquid reservoir space 10 is formed inside. The lid 8 is provided with a working fluid introduction port 11, a working fluid discharge port 13, a liquid inflow port 16, and a liquid discharge port 17. An air supply valve 18 is attached inside the working fluid introduction port 11, and an exhaust valve 19 is attached inside the working fluid discharge port 13. The air supply valve 18 includes a valve case 20, an air supply valve body 21, and a lower lift bar 22. The valve case 20 has a through hole in the axial direction, and an air supply valve port 24 is formed in the upper part of the through hole. Four openings 25 are provided on the peripheral wall of the intermediate portion of the valve case 20 to communicate the air supply valve port 24 with the inner side of the sealed container 2. The air supply valve body 21 is spherical and is positioned on the working fluid introduction port 11 side of the air supply valve port 24, and a lower elevating rod 22 is integrally attached to the lower end by welding. A plurality of, for example, four ribs 26 a extending around the air supply valve body 21 are formed at the lower end of the cap 26 above the air supply valve body 21. The inner surfaces of the ribs 26a are all located on concentric circles, and the diameter of the concentric circles is made slightly larger than the diameter of the air supply valve body 21, and the outer surface of the air supply valve body 21 is loosely slidably in contact with the air supply valve body 21. Guide up and down. A cylindrical filter 23 is provided around the rib 26 a between the lower outer periphery of the cap 26 and the upper end of the valve case 20. The cylindrical filter 23 has a number of filter holes for capturing foreign substances in the fluid. The lower lifting / lowering rod 22 is slidably guided up and down by a lower guide member 20a formed of a small-diameter inner peripheral wall formed on the inner surface of the valve case 20. The lower part of the lower lifting / lowering rod 22 comes out inward of the sealed container 2 and comes into contact with the continuous plate 27. The connecting plate 27 is connected to the valve shaft operating rod 28, and the valve shaft operating rod 28 is connected to the snap mechanism 5. The exhaust valve 19 includes a valve case 29, an exhaust valve body 30, and a lifting rod 31. The valve case 29 has a through hole in the axial direction, and has an exhaust valve port 32 at the upper part of the through hole. The exhaust valve body 30 held and fixed to the upper end of the elevating rod 31 from below the exhaust valve port 32 abuts. Open and close. The lower end of the elevating rod 31 is connected to the valve shaft operating rod 28 by a pin. The switching valve 4 is constituted by the air supply valve 18 and the exhaust valve 19. When the air supply valve 18 is opened, the exhaust valve 19 is closed, and when the air supply valve 18 is closed, the exhaust valve 19 is opened.

The float 3 is supported by a bracket 36 via a float arm 34 and a swing shaft 35. The bracket 36 is integrally attached to the lid portion 8 of the sealed container 2 by screws (not shown). The snap mechanism 5 includes a float arm 34, a sub arm 37, and a coil spring 38 in a compressed state. The float arm 34 is composed of two parallel opposing plates, the float 3 is fixed to the left end, and the right side portion is rotatably supported by the swing shaft 35. Accordingly, the float 3 swings up and down around the swing shaft 35. A first shaft 39 parallel to the swing shaft 35 is stretched around the center of the float arm 34. A first spring receiving member 40 is rotatably supported on the first shaft 39. A sub arm 37 is rotatably supported on the swing shaft 35. The sub arm 37 is composed of two plates facing each other in parallel, and a second shaft 41 parallel to the swing shaft 35 is stretched over the left end portion. A second spring receiving member 42 is rotatably supported on the second shaft 41. A coil spring 38 in a compressed state is disposed between the first and second spring receiving members 40 and 42. The float arm 34 is provided with a semicircular elongated hole 43, and a stopper shaft 44 parallel to the swing shaft 35 is supported by the bracket 36 in the elongated hole 43. The stopper shaft 44 regulates the rotation range of the sub arm 37. A connecting shaft 45 that is parallel to the swing shaft 35 is attached to the right end of the sub arm 37 so as to pass therethrough, and the lower end of the power transmission shaft 28 is connected to the connecting shaft 45. Stopper shafts 51 and 52 that are parallel to the swing shaft 35 and restrict the swing range of the float arm 34 are supported by the bracket 36.

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. First, in the external piping of the liquid pumping apparatus 1, the working fluid inlet 11 is connected to a high-pressure steam source, and the working fluid outlet 13 is connected to the steam circulation piping. The liquid inlet 16 is connected to a load such as a vapor using device via a check valve (not shown) that opens from the outside toward the liquid reservoir space 10, and the liquid outlet 17 is directed outward from the liquid reservoir space 10. It is connected to a liquid pumping destination such as a boiler via an open check valve (not shown). When there is no condensate in the liquid reservoir space 10 of the liquid pumping apparatus 1 of this embodiment, the float 3 is located at the bottom as shown in FIG. At this time, the air supply valve 18 in the switching valve 4 is closed and the exhaust valve 19 is opened. When condensate is generated in a load such as a steam using device, the condensate flows down from the pumping liquid inlet 16 to the liquid pumping device 1 and accumulates in the liquid reservoir space 10. When the float 3 rises due to the condensate accumulated in the liquid reservoir space 10, the float arm 34 rotates clockwise about the swing shaft 35, and the first shaft 39, which is a connecting portion with the coil spring 38, moves upward. To the extension line of the line connecting the swing shaft 35 and the second shaft 41, the coil spring 38 is compressed and deformed. When the float 3 further floats and the first shaft 39 exceeds the extension of the line connecting the oscillating shaft 35 and the second shaft 41, the coil spring 38 suddenly recovers from deformation and the sub arm 37 is counterclockwise. The connecting shaft 45 is snapped upward by rotating in the turning direction. As a result, the power transmission shaft 28 connected to the connection shaft 45 snaps upward, and the air supply valve 18 is opened and the exhaust valve 19 is closed. The lower elevating rod 22 is guided up and down by the lower guide member 20a, and the air supply valve body 21 is guided up and down by the rib 26a, thereby preventing the air supply valve body 21 and the lower elevating rod 22 from being inclined with a simple structure. it can. Further, by providing the cylindrical filter 23 around the rib 26a, foreign matter in the fluid is captured by the cylindrical filter 23, and between the lower lifting rod 22 and the lower guide member 20a, or between the air supply valve body 21 and the rib. It becomes difficult to bite foreign matter in the fluid between 26a and 26a.

When the air supply valve 18 is opened and the working fluid inlet 11 is opened, high-pressure steam is introduced into the sealed container 2, the internal pressure rises, and the condensate accumulated in the liquid reservoir space 10 is vapor pressure. And is discharged from the pressure liquid discharge port 17 to an external boiler or waste heat utilization device via a check valve (not shown). When the water level in the condensate reservoir space 10 is lowered due to the discharge of the condensate, the float 3 descends, and the float arm 34 rotates counterclockwise about the swing shaft 35, which is a connecting portion with the coil spring 38. The first shaft 39 moves downward and approaches an extended line connecting the swing shaft 35 and the second shaft 41, and the coil spring 38 is compressed and deformed. When the float 3 further descends and the first shaft 39 exceeds the extension of the line connecting the swing shaft 35 and the second shaft 41, the coil spring 38 suddenly recovers from deformation and the sub arm 37 rotates clockwise. The connecting shaft 45 snaps downward by rotating in the direction. As a result, the power transmission shaft 28 coupled to the coupling shaft 45 snaps downward, closing the air supply valve 18 and opening the exhaust valve 19.

  The present invention is not limited to a condensate pressure feeding device that sends condensate generated in various steam using devices to a boiler or a waste heat utilization place, but can also be used in a liquid pressure feeding device that pumps liquid such as hot water or fuel.

DESCRIPTION OF SYMBOLS 1 Liquid pumping apparatus 2 Sealed container 3 Float 4 Switching valve 5 Snap mechanism 10 Liquid reservoir space 11 Working fluid inlet 13 Working fluid outlet 16 Liquid inlet 17 Liquid outlet 18 Air supply valve 19 Exhaust valve 20a Lower guide member 21 Supply Air valve body 22 Lower lifting rod 23 Cylindrical filter 24 Air supply valve port 26 Cap 26a Rib 30 Exhaust valve body 32 Exhaust valve port

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, the lower lifting rod for opening the air supply valve body is opened to the air supply valve body. Attached integrally, the lower elevating rod is guided up and down by the lower guide member, and a plurality of ribs are provided around the air supply valve body so that the outer surface of the air supply valve body is in sliding contact with each other. A liquid characterized by being guided up and down on the inner surface of the rib and provided with a cylindrical filter around the rib Pumping device.

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