JP6113418B2 - Submersible pump - Google Patents

Description

  The present invention relates to a submersible pump that sucks and discharges various containers, tanks, ditches, or liquids such as rivers, lakes, ponds, and seas, or other fluids.

  Conventionally, submerged pumps (submersible pumps) have been widely used to discharge liquid accumulated in various containers and tanks. Such submersible pumps are often used to discharge sewage containing various impurities such as mud to the outside together with the impurities. For this reason, there are also submerged pumps and the like configured to appropriately disperse impurities precipitated by stirring the liquid, suck the impurities together with the liquid, and discharge the impurities to the outside. (For example, refer to Patent Document 1 or 2).

Japanese Patent Laid-Open No. 10-9182 JP 2006-336554 A

  However, although the submerged pump described in Patent Document 1 includes a stirrer that stirs the liquid, the stirrer is a water flow toward the lower side of the submerged pump, that is, the direction opposite to the suction direction of the pump. Therefore, both the stirring efficiency and the suction efficiency are poor, and the range in which the stirring action can be exerted is limited only to the vicinity of the pump.

  On the other hand, since the submersible pump described in Patent Document 2 is configured to perform stirring by discharging a jet at the start of operation, the stirring action can be exerted over a wider range. However, since the submersible pump described in Patent Document 2 requires a separate device for discharging a jet, both the initial cost and running cost increase, and the installation location is limited. was there.

  In view of such circumstances, the present invention is intended to provide a submerged pump capable of efficient stirring and suction.

(1) The present invention relates to a rotating body that rotates about a rotating shaft, a suction port provided on a surface of the rotating body, and a position on the surface of the rotating body that is located on the outer side in the centrifugal direction from the rotating shaft with respect to the suction port. A first discharge port provided on the first discharge port, a flow passage connecting the suction port and the first discharge port, and a movement trajectory of the first discharge port associated with rotation of the rotating body. And a second discharge port provided in the merge chamber, the rotating body has an exposed surface exposed to the outside, and the suction port has a closed peripheral edge. the a centrifugal direction outside its center of said rotary shaft and which are located so as to be positioned at the exposed surface, it is a pump in liquid.

  (2) The present invention also includes a casing that covers a part of the rotating body and forms the merging chamber, and the exposed surface is a surface of a portion of the rotating body protruding from the casing. The submerged pump according to (1) above.

( 3 ) The present invention is the submerged pump according to any one of (1) and (2) , wherein a plurality of the suction ports are provided.

( 4 ) The liquid according to any one of (1) to ( 3 ), wherein the exposed surface includes a region on the outer side in the centrifugal direction from the rotation shaft than the suction port. Medium pump.

  According to the submerged pump of the present invention, an excellent effect that efficient stirring and suction are possible can be achieved.

(A) It is the fragmentary sectional view of the front view which showed an example of the submerged pump which concerns on embodiment of this invention. (B) It is a bottom view of a submerged pump. (A) And (b) It is the figure which showed the action | operation of the submerged pump. (A) And (b) It is the figure which showed the usage example of the submerged pump. (A) And (b) It is the figure which showed the example of the other form of the submerged pump. (A) And (b) It is the figure which showed the example of the other form of the submerged pump.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  First, the structure of the submerged pump 1 according to the present embodiment will be described. FIG. 1A is a partial sectional view in front view showing an example of the submerged pump 1, and FIG. 1B is a bottom view of the submerged pump 1. As shown in these drawings, the submersible pump 1 includes a rotating body 10 that rotates, a casing 20 that is disposed on the outer periphery of the rotating body 10, a driving device 30 that rotationally drives the rotating body 10, and the rotating body 10. And a drive shaft 40 to which the drive device 30 is connected.

  The rotating body 10 has a substantially bullet shape, specifically, a shape in which a top surface 10a of a cylinder is formed in a planar shape and a bottom surface 10b is formed in a spherical shape, in other words, a shape in which a cylinder and a hemisphere are combined. The material which comprises the rotary body 10 is not specifically limited, For example, an appropriate material according to use conditions, such as a metal, ceramics, resin, rubber | gum, wood, etc., is employable.

  A plurality of suction ports 12 and a plurality of first discharge ports 14 are provided on the surface of the rotator 10, and are formed inside the rotator 10 so as to connect the suction ports 12 and the first discharge ports 14. A flow passage 16 is provided. A connecting portion 18 to which the drive shaft 40 is connected is provided at the center of the upper surface 10a of the rotating body 10. Accordingly, the rotating body 10 is configured to be driven by the driving device 30 and rotate about the central axis C as a rotation axis. In addition, the connection method of the drive shaft 40 and the connection part 18 may be any known method such as a screw or engagement.

  The suction port 12 is provided on the spherical bottom surface 10b (that is, the front end side of the rotating body 10). In the present embodiment, the four suction ports 12 are arranged at equal intervals on a circumference centered on the central axis C, and are formed in the same direction as the central axis C. The first discharge port 14 is provided on the side surface 10c. In the present embodiment, the four first discharge ports 14 are separated from each suction port 12 in a position (in the direction perpendicular to the central axis C from the central axis C) on the outer side in the radial direction (centrifugal direction) of the rotating body 10. Are arranged at each position). Further, the first discharge port 14 is formed in a direction orthogonal to the central axis C.

  The flow passage 16 is formed as a tunnel-like passage that connects one suction port 12 and one first discharge port 14. Therefore, four flow passages 16 are formed inside the rotating body 10. Each of the flow passages 16 is formed so as to go straight from the suction port 12 along the direction of the central axis C and then bend at a right angle so as to go straight toward the centrifugal direction of the rotating body 10 and reach the first discharge port 14. Yes. That is, the flow path 16 of this embodiment is comprised from the axial direction part 16a of the central axis C direction, and the centrifugal direction part 16b of the centrifugal direction.

  In the present embodiment, the suction port 12 and the first discharge port 14 are formed in a circular shape, but the shape (cross-sectional shape) of the suction port 12 and the first discharge port 14 is not particularly limited. Alternatively, other shapes such as an elliptical shape and a polygonal shape may be used. Further, the cross-sectional shape of the flow passage 16 is not particularly limited, and can be configured in an appropriate shape according to the shape and position of the suction port 12 and the first discharge port 14, the processing method, or the like.

  Further, in the present embodiment, the flow passage 16 is configured in an L shape that is bent at a substantially right angle for ease of processing, but the flow passage 16 may be configured as a smoothly curved curved passage. However, the suction port 12 and the first discharge port 14 may be connected linearly. In the present embodiment, the strength of the rotating body 10 other than the flow passage 16 is made solid by configuring the portion other than the flow passage 16, but the portion other than the flow passage 16 of the rotating body 10 is formed in a hollow shape. You may do it.

  The casing 20 is a hollow member provided along the circumferential direction so as to cover the side surface 10 c of the rotating body 10. A first insertion hole 22 through which the drive shaft 40 is inserted is formed on the drive device 30 side of the casing 20, and a second insertion hole 24 through which the rotating body 10 is inserted is formed on the opposite side of the drive device 30. Is formed.

  That is, the rotating body 10 is arranged in a state in which a part on the front end side protrudes from the casing 20. In the present embodiment, the hemispherical portion of the rotating body 10 protrudes from the casing 20, and the spherical bottom surface 10 b is the exposed surface 11 exposed from the casing 20. Further, the suction port 12 provided in the bottom surface 10 b is exposed from the casing 20. An appropriate seal structure (for example, a labyrinth or the like) is provided between the first insertion hole 22 and the drive shaft 40 and between the second insertion hole 24 and the rotating body 10 as necessary.

  A merging chamber 26 which is a space communicating with the first discharge port 14 is formed inside the casing 20, that is, between the casing 20 and the rotating body 10. The merging chamber 26 is formed along the movement locus (movement direction) of the first discharge port 14 accompanying the rotation of the rotator 10, and all the first discharge ports 14 are always in operation during the rotation of the rotator 10. Are communicated.

  The casing 20 is formed so that the cross-sectional area of the merging chamber 26 gradually increases in one circumferential direction (in this example, a clockwise direction when viewed from the bottom surface). An extension pipe 26a extends in the circumferential tangential direction from the portion where the cross-sectional area of the merge chamber 26 is maximized, and a second discharge port 28, which is an opening, is formed at the tip of the extension pipe 26a. Is provided.

  That is, although the details will be described later, the merging chamber 26 is sucked from the suction port 12 as the rotator 10 rotates, and the fluid discharged from the first discharge port 14 flows in the circumferential direction (the rotation direction of the rotator 10). ) And then discharged from the second discharge port 28. A transport pipe 50 that transports the discharged fluid is connected to the second discharge port 28.

  In the present embodiment, the driving device 30 is constituted by a motor. The driving device 30 rotates the rotating body 10 via the driving shaft 40 and rotates it around the central axis C. The casing 20 is fixed to the housing 32 of the drive device 30 via a connection member 60. In the present embodiment, the housing 32 of the drive device 30 is configured in a known sealed structure (watertight structure), and the known seal structure 62 that seals the periphery of the drive shaft 40 in the connection member 60 is provided, so The entire pump 1 can be immersed in the liquid.

  In the present embodiment, the driving device 30 is configured to directly drive the rotating body 10, but the driving device 30 rotationally drives the rotating body 10 via a transmission mechanism such as a gear, a chain, and a sprocket. You may comprise. The drive device 30 may be of any existing type such as an electric motor or an air motor.

  Next, the operation of the submerged pump 1 will be described. FIGS. 2A and 2B are views showing the operation of the submerged pump 1. 2A is a cross-sectional view of the submerged pump 1 as viewed from the front, and FIG. 2B is a cross-sectional view of the submerged pump 1 as viewed from the bottom.

  When the rotating body 10 is rotated in a state where the submerged pump 1 is immersed in the fluid, the fluid that has entered the flow passage 16 rotates together with the rotating body 10. Then, centrifugal force acts on the fluid in the flow passage 16, and the fluid in the flow passage 16 flows toward the outside in the radial direction of the rotating body 10 as shown in FIGS. Since the first discharge port 14 is provided on the radially outer side of the rotator 10 with respect to the suction port 12, a stronger centrifugal force acts on the first discharge port 14 than the suction port 12. Accordingly, the fluid in the flow passage 16 flows from the suction port 12 toward the first discharge port 14 as long as the rotating body 10 rotates. Accordingly, the external fluid is sucked into the flow passage 16 from the suction port 12 and flows into the merge chamber 26 from the first discharge port 14.

  The fluid that has flowed into the merge chamber 26 flows in the direction of rotation of the rotating body 10 along the merge chamber 26 as shown in FIG. 4B. That is, the fluid in the merge chamber 26 has a large cross-sectional area. It flows toward the direction and is finally discharged from the second discharge port 28 to the transport pipe 50. In this way, the submerged pump 1 continuously sucks external fluid from the suction port 12 and discharges it from the second discharge port 28.

  In the present embodiment, the suction port 12 is provided outside the central axis C in the centrifugal direction, and the suction port 12 is exposed from the casing 20, so that the suction port 12 that rotates with the rotation of the rotating body 10 is provided. External fluid is sucked directly. In the present embodiment, by providing the suction port 12 in this manner, the flow toward the suction port 12 is a swirling flow. That is, in the present embodiment, the external fluid is appropriately stirred and sucked while stirring.

  Furthermore, in this embodiment, a part of the surface (bottom surface 10b) of the rotating body 10 is the exposed surface 11, so that the fluid in the vicinity of the exposed surface 11 is rotated together with the rotating body 10 due to the influence of viscosity. Yes. By doing in this way, the external fluid can be made to flow over a wider range by a synergistic effect with the suction port 12. Further, since the accompanying flow of the flow toward the suction port 12 can be diffused radially from the submerged pump 1 by the centrifugal force caused by the swirling flow of the fluid in the vicinity of the exposed surface 11, the tank in which the submerged pump 1 is immersed A circulation flow can be formed inside.

  That is, in the present embodiment, by causing a part of the rotating body 10 to function as a stirring body, the fluid is sucked while exerting a stirring action over a wider range in the external fluid without separately providing a stirring device or the like. Can be discharged. Thereby, for example, impurities such as solid contained in the fluid can be appropriately dispersed and discharged together with the fluid, or, for example, a plurality of types of fluid can be more uniformly mixed or emulsified before being discharged. .

  Such a stirring ability can be adjusted by the number and arrangement of the suction ports 12 and the area and shape of the exposed surface 11. That is, the number and arrangement of the suction ports 12 and the area and shape of the exposed surface 11 are not limited to those shown in the present embodiment, and any number, arrangement, area and shape can be adopted.

  For example, six each of the suction ports 12, the first discharge ports 14, and the flow passages 16 may be provided, or the distance from the central axis C may be changed in the plurality of suction ports 12. Alternatively, one suction port 12 may be provided at the center of the bottom surface 10 b and the flow passage 16 may be branched toward the plurality of first discharge ports 14. Further, the shape of the exposed surface 11 may be, for example, a conical shape or a cylindrical shape, or an appropriate uneven shape may be provided on the exposed surface 11. In the present embodiment, the bottom surface 10b is formed in a spherical shape, and the shape of the rotating body 10 is formed such that the thickness in the central axis C direction gradually decreases outward in the radial direction. It is possible to cause a part of the flowing flow to flow smoothly along the bottom surface 10b and diffuse radially. In addition, a cover member that covers the surface of the rotating body 10 may be provided in the casing 20 to adjust the area of the exposed surface 11.

  FIGS. 3A and 3B are diagrams showing an example of use of the submerged pump 1. The submerged pump 1 is used, for example, in a state of being placed on a bottom 112 of a tank 110 storing a liquid 100 via an appropriate pedestal 70 or the like, as shown in FIG. The casing 20 may be provided with legs, and the submerged pump 1 may be placed directly on the bottom 112. A transport pipe 50 is connected to the second discharge port 28 of the submerged pump 1, and a cable 80 that supplies power to the driving device 30 is connected to a power source (not shown).

  By operating the submerged pump 1 and rotating the rotating body 10, the liquid 100 in the tank 110 is sucked from the suction port 12 and discharged out of the tank 110 through the transport pipe 50. At this time, as described above, since the stirring action can be exerted over a wide range in the tank 110, impurities such as sludge and oil contained in the liquid 100 are appropriately dispersed in the liquid 100, and the liquid 100 At the same time, it is efficiently sucked into the submerged pump 1 and discharged out of the tank 110. Further, the submersible pump 1 has high durability because it does not include an impeller that is easily worn or damaged unlike a conventional pump, and even when hard impurities such as gravel are present in the tank 110. In addition to being usable for a long time, it is possible to reduce the frequency of maintenance.

  FIG. 2B shows an example in the case where the sludge accumulated on the bottom 112 of the tank 110 is discharged. In this example, the exposed surface 11 of the rotating body 10 is brought into contact with a deposition layer 102 such as sludge, and the submerged pump 1 is moved along the bottom 112 by the moving mechanism 90. By doing in this way, since the deposition layer 102 is stirred by the rotating exposed surface 11 and the sludge and the like can be sucked while being appropriately mixed with the liquid 100, the accumulated sludge and the like can be efficiently discharged. . In particular, in the present embodiment, since the suction port 12 is rotated, it is possible to more efficiently stir the deposited layer 102 such as sludge.

  As the moving mechanism 90, various existing mechanisms can be employed. Further, instead of the moving mechanism 90, the submersible pump 1 may be pulled by a ship or human power, for example. Moreover, since the submerged pump 1 has high durability of the rotary body 10, it can also be used for rivers, dams, harbors and other dredging.

  Next, other forms of the submerged pump 1 will be described. 4 (a) and 4 (b) and FIGS. 5 (a) and 5 (b) are diagrams showing examples of other forms of the submerged pump 1. FIG.

  FIG. 4A shows that the second suction port 13 and the third discharge port 15 are provided on the exposed surface 11 of the rotator 10, and the second discharge port 13 and the third discharge port are provided inside the rotator 10. The example which provided the 2nd flow path 17 which connects 15 is shown. As described above, the second suction port 12, the third discharge port 15, and the second flow passage 17 are provided, and the third discharge port 15 is located on the outer side in the centrifugal direction from the central axis C than the second suction port 13. By disposing the fluid, the fluid can be sucked from the second suction port 13 and ejected from the third discharge port 15 as the rotating body 10 rotates.

  That is, by doing in this way, it becomes possible to increase the stirring ability and to exert the stirring action over a wider range. Note that the number and position of the second suction port 13 and the third discharge port 15 are not particularly limited, and any number and position can be adopted depending on the required stirring ability. Further, instead of providing the second suction port 13, the flow passage 16 may be branched in the middle and connected to the third discharge port 15.

  FIG. 2B shows an example in which an opening 16 c that opens in the upper surface 10 a of the rotating body 10 is provided in the middle of the flow passage 16. In this way, by providing the opening 16c in the middle of the flow passage 16, a part of the fluid sucked from the suction port 12 is placed between the upper surface 10a of the rotating body 10 and the facing surface 20a of the casing 20 facing the upper surface 10a. It is possible to apply a shearing force to the fluid between the upper surface 10a and the opposing surface 20a.

  That is, by doing so, not only can impurities contained in the fluid be ground and refined, but also the mixing ability and emulsification ability of the rotating body 10 can be improved. In addition, what is necessary is just to set the distance of the clearance gap between the upper surface 10a and the opposing surface 20a suitably according to a use. Moreover, you may make it provide appropriate uneven | corrugated shape in the upper surface 10a or the opposing surface 20a as needed.

  FIG. 5A shows an example in which the submerged pump 1 has a two-stage configuration. In this example, two rotating bodies 10 are arranged in series, and a merge chamber 26 corresponding to the first-stage rotating body 10 is communicated with the suction port 12 of the second-stage rotating body 10 via a connection chamber 27. A second discharge port 28 is provided in the merge chamber 26 corresponding to the second-stage rotating body 10. Therefore, the exposed surface 11 is provided only on the first-stage rotating body 10.

  By doing in this way, the capability (lift head) of the submerged pump 1 can be improved. Needless to say, the submerged pump 1 may be configured in three or more stages by providing three or more rotating bodies 10. Further, the plurality of rotating bodies 10 are not necessarily arranged coaxially, and may be arranged in a state in which the respective rotation axes are shifted. Further, the plurality of rotating bodies 10 may be configured in different shapes or sizes. Further, instead of the second-stage and subsequent rotating bodies 10, an impeller as provided in a general pump may be provided.

  FIG. 2B shows an example in which the submerged pump 1 is provided with a rotating body 10 dedicated to stirring. In this example, the drive shafts 40 are provided on both sides of the drive device 30, the rotator 10 is connected to each drive shaft 40, and the merge chamber 26 and the second discharge port 28 are provided only for one of the rotators 10. I try to provide it. By doing so, it becomes possible to suck the fluid from the suction port 12 of the other rotating body 10 and eject the fluid from the first discharge port 14, so that the stirring action is performed over a very wide range in the fluid. Can be affected. The two rotating bodies 10 may be configured in different shapes or sizes.

  Moreover, although illustration is abbreviate | omitted, you may make it extend the drive shaft 40 and arrange | position the drive device 30 out of the tank (outside the fluid) in which the submerged pump 1 is installed. Further, an axial flow passage is provided inside the drive shaft 40, and the outlet of the axial flow passage is connected to the flow passage 16, or the outlet of the rotary body 10 is connected to the surface of the rotating body 10 and the submerged pump 1 is installed in the tank ( In the fluid) or in the merging chamber 26. By providing the axial flow passage in this way, other substances such as liquid, gas, and powder can be introduced into the fluid in which the submerged pump 1 is used via the axial flow passage. In this case, for example, the inlet of the shaft flow passage may be connected to another pump, a compressor, or the like, and other liquid or gas may be pumped. Other liquids or gases may be sucked by pressure. Further, for example, by opening the entrance of the shaft portion flow passage in the tank (in the fluid) where the submerged pump 1 is installed, the fluid in another place in the tank is placed in the flow passage 16 or around the rotating body 10. Can be supplied.

  As described above, the submerged pump 1 according to the present embodiment includes the rotating body 10 that rotates about the rotating shaft (center axis C), the suction port 12 provided on the surface of the rotating body 10, and the rotating body 10. A first discharge port 14 provided at a position on the outer side in the centrifugal direction from the rotation axis (center axis C) with respect to the suction port 12, a flow passage 16 connecting the suction port 12 and the first discharge port 14, and rotation. A merging chamber 26 provided along the movement trajectory of the first outlet 14 accompanying the rotation of the body 10 and communicating with the first outlet 14, and a second outlet 28 provided in the merging chamber 26. The rotating body 10 has an exposed surface 11 exposed to the outside, and the suction port 12 is provided on the exposed surface 11.

  By adopting such a configuration, it is possible to efficiently suck a fluid such as an external liquid while stirring more efficiently than a conventional submerged pump. That is, the exposed surface 11 and the suction port 12 can suck and suck external liquid or the like directly, and a part of the rotating body 10 can function as a stirring body. Thereby, the impurities contained in the liquid or the like can be sucked while being efficiently dispersed and discharged together with the liquid or the like. In particular, sufficient agitation can be performed by the flow of suction, in other words, the direction of flow that exerts a stirring action can be made substantially coincident with the direction of flow by suction, so efficient stirring and suction can be performed. It can be carried out.

  Further, the submerged pump 1 includes a casing 20 that covers a part of the rotating body 10 and forms a merge chamber 26, and the exposed surface 11 is a surface of a portion protruding from the casing 20 of the rotating body 10. By doing so, it becomes possible to stir the fluid in a continuous state with a wider range of fluid around the submerged pump 1, so that the agitating function by the exposed surface 11 and the suction port 12 can be reliably performed, The range in which the stirring action can be exerted can be expanded, and the stirring effect can be enhanced.

  The suction port 12 is provided on the outer side in the centrifugal direction of the rotation shaft (center axis C). By doing so, the suction port 12 can be rotated and moved with the rotation of the rotating body 10, so that the stirring ability can be further increased.

  A plurality of suction ports 12 are provided. By doing in this way, while being able to raise suction power and to be able to make the flow which goes to the inlet 12 into a more complicated turbulent flow state, stirring ability can be raised more.

  Further, the exposed surface 11 includes a region outside the centrifugal direction from the rotation axis (center axis C) than the suction port 12. By doing so, it is possible to generate a swirling flow over a wider range around the submerged pump 1 and to diffuse the accompanying flow of the flow toward the suction port 12 radially from the submerged pump 1. The range in which the stirring action can be exerted can be expanded and the stirring effect can be enhanced.

  In the present embodiment, an example in which the rotator 10 is configured in a substantially bullet shape is shown, but the present invention is not limited to this, and various other shapes may be adopted as the shape of the rotator 10. Can do.

  In the present embodiment, an example in which the suction port 12 is provided in the direction of the central axis C and the first discharge port 14 is provided in a direction orthogonal to the central axis C has been described. Without being limited thereto, the suction port 12 and the first discharge port 14 may be provided in other directions. For example, the first discharge port 14 may be provided on the upper surface 10 a of the rotating body 10.

  Further, in the present embodiment, an example in which one suction port 12 and one first discharge port 14 are connected by the flow passage 16 is shown, but the present invention is not limited to this, and one The suction port 12 and a plurality of first discharge ports 14 may be connected, or the plurality of suction ports 12 and one first discharge port 14 may be connected.

  In addition, the shapes of the casing 20 and the merge chamber 26 are not limited to the shapes shown in the present embodiment, and various shapes may be used depending on the shape of the rotating body 10 and the arrangement of the first discharge ports 14. Can be adopted. For example, the shape of the merge chamber 26 may be such that the cross-sectional area does not gradually increase in the rotation direction of the rotating body 10.

  Further, the merge chamber 26 may be communicated with the first discharge port 14 only when the first discharge port 14 is in a specific position by the rotation of the rotating body 10. Further, in this case, when a plurality of merging chambers 26 are arranged along the movement trajectory of the first discharge port 14 and the first discharge port 14 and the merging chamber 26 are not in communication, the first discharge port The fluid may be ejected from 14 to the outside.

  Moreover, it cannot be overemphasized that the submerged pump of this invention is not limited to liquid use, It can be used also about other fluids, such as various gas and a granular material.

  As mentioned above, although embodiment of this invention was described, the submerged pump of this invention is not limited to above-described embodiment, In the range which does not deviate from the summary of this invention, a various change can be added. Of course.

  The submerged pump of the present invention can be used in fields such as discharge of sewage at various factories, civil engineering construction sites, etc., dredging at dams, harbors, etc., or delivery of various liquids.

DESCRIPTION OF SYMBOLS 1 Submerged pump 10 Rotating body 11 Exposed surface 12 Suction port 14 1st discharge port 16 Flow path 20 Casing 26 Merge chamber 28 2nd discharge port C Center axis

Claims (2)

A rotating body that rotates about a rotation axis;
A suction port provided on the surface of the rotating body;
A first discharge port provided on the surface of the rotating body at a position on the outer side in the centrifugal direction from the rotation shaft than the suction port;
A flow path connecting the suction port and the first discharge port;
A merging chamber that is provided along a movement trajectory of the first discharge port accompanying rotation of the rotating body, and communicates with the first discharge port;
A second discharge port provided in the merge chamber,
The rotating body has an exposed surface exposed to the outside,
The suction port has a closed peripheral edge, and is provided such that the center of the suction port is located outside the rotating shaft in the centrifugal direction on the exposed surface ,
A casing that covers a part of the rotating body and forms the merge chamber;
The exposed surface is a surface of a portion protruding in the axial direction from the casing of the rotating body,
The exposed surface includes a region on the outer side in the centrifugal direction from the rotation shaft than the suction port, so that the entire periphery of the suction port protrudes from the casing in an axial direction without overlapping the casing. To position,
It is characterized by
Submersible pump. A plurality of the inlets are provided,
The submerged pump according to claim 1 .

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