JP2012107528A - Liquid pumping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid pumping device in which the downward movement of an up-and-down rod makes an air supply ball valve element move downward by preventing the air supply ball valve element from pivoting at a position where the air supply ball valve element opens an air supply valve port.SOLUTION: In the liquid pumping device 1, a working fluid supply port 11 and a working fluid discharge port 13, and a fluid inlet 16 and a fluid outlet 17 are provided to a hermetic container 2, and the opening and closing of an air supply valve 20 at the working fluid supply port 11 and an air release valve 21 at the working fluid outlet 13 are changed over according to the height of the liquid level of the liquid stored in the hermetic container 2. The air supply ball valve element 21 is disposed on the working fluid supply port side 11 of the air supply valve port 24, and the up-and-down rod 22 for openably operating the air supply ball valve element 21 is disposed so as to extend through the air supply valve port 24. A conical spring 23 gradually reduced in diameter downward is provided to press the air supply ball valve element 21 in the direction in which the air supply valve port 24 on the lower side is closed. The up-and-down rod 22 is vertically guided by an upper guide member 20a and a lower guide member 20b.

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 a liquid pumping device that inflows and 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 spherical air supply is provided on the working fluid inlet side of the air supply valve port A conical that holds a spherical air supply valve body that is arranged above the spherical air supply valve body by arranging a valve body and an elevating rod that opens the spherical air supply valve body through the air supply valve port. A wall member is arranged.

JP2009-19602

The above conventional liquid pumping device guides and holds the spherical air supply valve body opened by the conical wall member on the central axis of the conical wall member, so that the spherical air supply is lowered when the lifting rod is moved downward. The valve body is prevented from turning at a position where the supply valve port is opened. However, when the lifting rod is moved up in a tilted state, the spherical air supply valve body is held at a position shifted from the central axis of the conical wall member. There was a problem that the body swirled at the position where the air supply valve opening was opened.

Therefore, the problem to be solved by the present invention is that the spherical air supply valve body can be moved downward by the lowering of the lifting rod by preventing the spherical air supply valve body from turning at the position where the air supply valve port is opened. It is to provide a liquid pumping device.

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. A liquid pressure feeding device that closes an open air supply valve port to allow liquid to flow in from a liquid inlet, then closes an exhaust valve port and opens the air supply valve port to pump liquid accumulated in a sealed container from the liquid discharge port. A spherical air supply valve body is arranged on the side of the working fluid inlet of the air supply valve port, and a lifting rod for opening the spherical air supply valve body is disposed through the air supply valve port. A conical spring with a smaller diameter is installed to urge the air valve body in the direction to close the lower air supply valve port, and the lifting rod It is characterized in that for guiding up and down the inner member and the lower guide member.

According to the present invention, the spherical air supply valve body is held by the conical spring having a smaller diameter at the position where the air supply valve port is opened and does not turn. Further, the elevating rod is guided up and down by the upper guide member and the lower guide member and does not tilt. Therefore, the spherical air supply valve body with the air supply valve opening opened can be guided and held on the central axis of the conical spring. It is possible to prevent the spherical air supply valve body from moving down by the downward movement of the elevating rod by preventing the swiveling from being performed at the open position.

It is sectional drawing of the liquid pumping apparatus concerning embodiment of this invention. It is an expanded sectional view of the valve opening 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, a spherical air supply valve body 21, an elevating rod 22, and a conical spring 23. 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. Two openings 25 for communicating the working fluid introduction port 11 and the air supply valve port 24 are provided on the peripheral wall above the air supply valve port 24 of the valve case 20. Four openings 26 are provided in the peripheral wall of the middle portion of the valve case 20 to communicate the air supply valve port 24 with the inner side of the sealed container 2. The spherical air supply valve body 21 is located on the working fluid introduction port 11 side of the air supply valve port 24, and is placed on an elevating rod 22 that penetrates the air supply valve port 24. A conical spring 23 having a smaller diameter is provided above the spherical air supply valve body 21 so that the lower end thereof is in contact with the spherical air supply valve body 21 and the upper end thereof is in contact with a snap ring 26 fixed to the valve case 20. The conical spring 23 urges the spherical air supply valve body 21 in a direction to close the lower air supply valve port 24. The upper and lower rods 22 are guided by an upper guide member 20a made of three ribs formed on the inner surface of the valve case 20 so as to be slidable in the vertical direction. The lower part is guided by the guide member 20b so as to be slidable up and down. The lower part of the lifting / lowering rod 22 comes out to the inside 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 lever 34 and a shaft 35, and the snap mechanism 5 is supported by a bracket 38 via a swing shaft 37. The bracket 36 and the bracket 38 are coupled by a screw (not shown) and are integrally attached to the lid portion 8 of the sealed container 2. The lever 34 is formed by bending a plate into a “U” shape, the two plates are opposed in parallel, and the float 3 is coupled to the bent portion. A shaft 40 is attached to the other end of the lever 34. The bracket 36 is composed of two “L” -shaped plates, and the shaft 35 and the shafts 41 and 42 are spanned and connected. The float 3 rotates about the shaft 35. The shafts 41 and 42 also serve as upper and lower limit stoppers for the float 3. Similarly, the bracket 38 is also composed of two “L” -shaped plates, and the swing shaft 37 and the shaft 43 are stretched over and connected. The shaft 43 also serves as a stopper for the sub arm 52 described below. The snap mechanism 5 includes a float arm 51, a sub arm 52, a compressed coil spring 54, a spring receiving member 55, and a spring receiving member 56. The float arm 51 is composed of two plates facing each other in parallel, and a groove 57 is provided at the left end of the two plates. The shaft 40 of the lever 34 is fitted in the groove 57 of the float arm 51. The float arm 51 is rotatably supported by the swing shaft 37 at the right end. Therefore, the float arm 51 follows up and down of the float 3 and swings up and down around the swing shaft 37. A right end portion of the float arm 51 is expanded downward, and a first shaft 58 parallel to the swing shaft 37 is spanned on the lower end portion thereof, and the spring receiving member 55 is rotatably supported by the first shaft 58. ing. An upper end portion of the sub arm 52 is rotatably supported on the swing shaft 37. The sub arm 52 is composed of two plates opposed in parallel, and each plate has an inverted “L” shape. A swinging shaft 37 and a second shaft 59 parallel to the first shaft 58 are stretched around the lower end portion of the sub arm 52, and the spring receiving member 56 is rotatably supported by the second shaft 59. A compressed coil spring 54 is attached between the spring receiving members 55 and 56. A shaft 60 is stretched over the upper left end of the sub arm 52, and the lower end of the valve shaft operating rod 28 is connected. A window 61 is opened in the float arm 51 so as not to hinder the movement of the shaft 60.

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 such that the spherical air supply valve body 21 closes the air supply valve port 24, and the exhaust valve 19 has the exhaust valve body 30 opened the exhaust valve port 32. 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 storage space 10, the lever 34 rotates clockwise about the shaft 35, and the float 40 moves in conjunction with the downward movement of the shaft 40 due to the rotation of the lever 34. The arm 51 rotates counterclockwise about the swing shaft 37, and the first shaft 58, which is a connecting portion with the coil spring 54, moves to the right to connect the swing shaft 37 and the second shaft 59. As the wire approaches the wire, the coil spring 54 is compressed and deformed. Then, the float 3 further rises, the first shaft 58 is aligned on the line connecting the swing shaft 37 and the second shaft 59, and the float 3 is still lifted so that the first shaft 58 is moved from the swing shaft 37 to the first shaft. When the coil spring 54 is moved to the right from the line connecting the two shafts 59, the deformation of the coil spring 54 is suddenly restored, the sub arm 52 rotates clockwise, and the second shaft 59 snaps to the left. As a result, the valve shaft operating rod 28 connected to the shaft 60 of the sub arm 52 moves upward, the lifting rod 22 and the lifting rod 31 move upward, and the air supply valve 18 in the switching valve 4 is a spherical air supply valve. The body 21 opens the air supply valve port 24, and the exhaust valve 19 closes the exhaust valve port 32 of the exhaust valve 19. Since the lifting rod 22 can be prevented from tilting by guiding the lifting rod 22 up and down with the upper guide member 20a and the lower guide member 20b, the opened spherical air supply valve body 21 is guided on the central axis of the conical spring 23. The spherical air supply valve body 21 is prevented from turning at the position where the air supply valve port 24 is opened when the elevating rod 22 is moved downward. The air valve body 21 can be moved downward to close the air supply valve port 24.

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 decreases due to the discharge of the condensate, the float 3 descends, the lever 34 rotates counterclockwise around the shaft 35, and the lever 40 rotates upward to the shaft 40. In conjunction with the movement, the float arm 51 rotates clockwise about the swing shaft 37, and the first shaft 58, which is a connecting portion with the coil spring 54, moves to the left and the swing shaft 37 and the first shaft The coil spring 54 is compressed and deformed near the line connecting the two shafts 59. Then, the float 3 is further lowered, the first shaft 58 is arranged on a line connecting the swing shaft 37 and the second shaft 59, and the float 3 is further lowered so that the first shaft 58 is moved to the swing shaft 37 and the second shaft 59. When the coil spring 54 is moved leftward from the line connecting the two shafts 59, the deformation of the coil spring 54 is suddenly restored, the sub arm 52 rotates counterclockwise, and the second shaft 59 snaps to the right. As a result, the valve shaft operating rod 28 connected to the shaft 60 of the sub arm 52 moves downward, the lifting rod 22 and the lifting rod 31 move downward, and the air supply valve 18 in the switching valve 4 is spherically fed. The air valve body 21 closes the supply valve port 24, and the exhaust valve 19 opens the exhaust valve port 32 of 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 Airtight container 3 Float 4 Switching valve 5 Snap mechanism 10 Liquid storage space 11 Working fluid inlet 13 Working fluid outlet 16 Liquid inlet 17 Liquid outlet 18 Air supply valve 19 Exhaust valve 20 Valve case 20a Upper guide Member 20b Lower guide member 21 Spherical air supply valve body 22 Lifting rod 23 Conical spring 24 Air supply valve port 28 Power transmission shaft 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, the exhaust valve port is closed, the air supply valve port is opened, and a liquid pressure feeding device that pumps the liquid accumulated in the sealed container from the liquid discharge port, the spherical air supply valve on the working fluid introduction port side of the air supply valve port In the arrangement in which the lifting rod for opening the spherical air supply valve body is disposed through the air supply valve port, the spherical air supply valve body is biased in the direction of closing the lower air supply valve port. A tapered spring with a smaller diameter is provided in the lower part, and the lifting rod is guided up and down by the upper guide member and the lower guide member. Liquid pumping device that.

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