JP7010762B2 - Suspend type submersible pump - Google Patents

Description

The present invention relates to a submersible pump used for, for example, drainage of floods and heavy rains, water supply to fields, pumping of firefighting water, etc., and in particular, the entire submersible pump including a float operates while floating between the water surface and the water bottom. Suspend (“suspend” is a trademark pertaining to Commercial Application 2018-059503, which the applicant filed for trademark registration on May 8, 2018).

There are two types of conventional submersible pumps, a floating type on the surface of the water and a grounded type on the bottom of the water. Disclosed as a water surface floating type submersible pump, for example, JP-A-2001-115983 (Patent Document 1), JP-A-2001-140787 (Patent Document 2), and JP-A-2007-255236 (Patent Document 3). There is something that has been done. On the other hand, as a submersible pump grounded to the bottom of the water, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2015-17534 (Patent Document 4).

<Water floating type submersible pump>
As disclosed in Patent Documents 1 to 3, the water surface floating type submersible pump has a configuration in which the submersible pump is suspended from a float floating on the water surface. The submersible pump is suspended horizontally on the float so that the main shaft of the built-in submersible motor is oriented sideways.

In such a water surface floating type submersible pump, while floating at the height of the water surface, water near the water surface is sucked by the impeller of the submersible motor and discharged from the hose connected to the discharge port. After that, the floating water surface type submersible pump sinks as the water level decreases, and finally operates in a state of being in contact with the bottom of the water (see FIG. 6 of Reference 3).

<Submersible pump grounded to the bottom of the water>
As disclosed in US Pat. To. The water bottom grounded submersible pump disclosed in Patent Document 4 is provided with a water suction port at a position separated from the water bottom.

In such a submersible pump with a grounded bottom, the water near the bottom of the water is sucked by the impeller of the submersible motor and discharged from the hose connected to the discharge port while the pump is grounded to the bottom of the water. After that, the submersible pump on the bottom of the water stops the operation of the submersible motor when the water level drops below the operable water level.

Japanese Unexamined Patent Publication No. 2001-115983 Japanese Unexamined Patent Publication No. 2001-140787 Japanese Unexamined Patent Publication No. 2007-255236 Japanese Unexamined Patent Publication No. 2015-17534

The water surface floating type submersible pump has a problem that it is easy to suck in the dust floating on the water surface. On the other hand, the bottom-grounded submersible pump has a problem that it easily sucks in dust and mud accumulated on the bottom of the water. The sucked dust and mud block the suction port of the submersible pump to reduce the suction force, or enter the casing of the submersible pump to clog the water flow path and cause a problem that the submersible motor is damaged.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a suspend type submersible pump in which the entire submersible pump operates while floating between the water surface and the water bottom.

(1) In order to achieve the above object, the suspend type submersible pump of the present invention is a submersible pump that is put into water and discharges water sucked by an impeller of a submersible motor, and is based on the submersible weight of the submersible pump. A float that generates a small buoyancy and a pair of flow paths that are provided substantially symmetrically with respect to the main axis of the submersible motor are provided, and the wall portion that defines each flow path is substantially centered on the main axis of the submersible motor. A pair of inclined surfaces provided symmetrically and inclined upward from the outside to the center of the submersible pump, each inclined surface is provided with a water suction port, and each flow path is described from the suction port. Due to the thrust generated by reaching the impeller of the submersible motor and sucking water from each suction port and the buoyancy of the float, the entire submersible pump including the float operates while floating between the water surface and the water bottom. It is characterized by that.

(2) Preferably, in the suspend type submersible pump of the above (1), a hollow pump casing for accommodating the submersible motor inside and a hollow floating box attached to the outside of the pump casing are provided. A pair of flow paths are provided inside the floating box, a wall portion constituting the floating box includes the pair of inclined surfaces, and each inclined surface is provided with a suction port, and each flow path is provided. It is preferable that the suction port reaches the impeller of the submersible motor housed in the pump casing.

(3) Preferably, in the suspend type submersible pump of the above (2), the floating box is composed of a substantially U-shaped box body surrounding the left and right side surfaces and the back surface of the pump casing, and the left and right sides constituting the floating box. The side wall may include the pair of inclined surfaces extending along the longitudinal direction of the pump casing, and the suction port may be provided on substantially the entire surface of each inclined surface.

(4) Preferably, in the suspend type submersible pump of (2) or (3), the float is formed of a plate-shaped foamed resin and mounted on the pump casing and the floating box. good.

(5) It is preferable that the suspend type submersible pump of the above (4) has a shape in which the float does not interfere with the upper side of the pair of suction ports of the floating box.

(6) Preferably, in the suspend type submersible pump according to any one of (1) to (5) above, the suction port may be configured to be composed of a plurality of holes or grooves.

In the suspend type submersible pump of the present invention, the entire submersible pump including the float operates while floating between the water surface and the water bottom due to the upward thrust generated by sucking water from each suction port and the buoyancy of the float. do. As a result, the suspend type submersible pump of the present invention is less likely to suck in dust floating on the water surface and dust and mud accumulated on the bottom of the water, and can maintain the original suction capacity and discharge capacity. Therefore, the suspend type submersible pump of the present invention is suitable for life-saving applications such as drainage of inland water due to flood, drainage of submersible water due to heavy rain, and pumping of fire-fighting water for extinguishing a fire.

It is a perspective view which shows the suspend type submersible pump which concerns on one Embodiment of this invention. It is a top view which shows the said suspend type submersible pump. It is a bottom view which shows the said suspend type submersible pump. It is a front view which shows the said suspend type submersible pump. It is a rear view which shows the said suspend type submersible pump. It is a left side view which shows the said suspend type submersible pump. It is a right side view which shows the said suspend type submersible pump. It is a partial cross-sectional view which shows the internal structure of the above-mentioned suspend type submersible pump. It is a schematic diagram which shows the operation of the said suspend type submersible pump.

Hereinafter, the suspend type submersible pump according to the embodiment of the present invention will be described with reference to the drawings. First, the outline of the suspend type submersible pump of the present embodiment will be described, and then each component of the suspend type submersible pump will be described in detail.

<Overview of suspend type submersible pump>
The appearance of the suspend type submersible pump 1 is shown in FIGS. 1 to 7. Further, FIG. 8 shows the internal structure of the suspend type submersible pump 1. In these drawings, the suspend type submersible pump 1 is mainly composed of a submersible motor 10, a pump casing 20, a floating box 30, and a float 40.

As shown in FIG. 8, the submersible motor 10 is housed inside the pump casing 20. The submersible motor 10 and the pump casing 20 constitute a submersible pump main body that discharges water sucked by the impeller 16. The floating box 30 is composed of a substantially U-shaped box body that surrounds the left and right side surfaces and the back surface of the pump casing 20. A pair of suction ports 33, 33 are provided on the left and right side walls of the floating box 30. Further, inside the floating box 30, a pair of flow paths 31 and 31 reaching from each suction port 33 to the impeller 16 arranged at the inflow port 21 of the pump casing 20 are provided. Further, as shown in FIGS. 1 to 7, a float 40 is mounted on the pump casing 20 and the floating box 30.

The suspend type submersible pump 1 having such a configuration is used by being put into water such as inland water, submersion, a water tank, or natural water. When the control panel 60 is operated to drive the submersible motor 10, the impeller 16 rotates at high speed, and the air inside the pump casing 20 and the floating box 30 is sucked out. After that, water is sucked from each suction port 33 of the floating box 30. The water sucked from each suction port 33 flows in the pump casing 20 through each flow path 31 in the floating box 30, and is discharged from the discharge port 22 of the pump casing 20. A hose 50 is connected to the discharge port 22, and the water discharged from the discharge port 22 passes through the hose 50 and is sent to an arbitrary place.

<Underwater motor>
As shown in FIG. 8, the submersible motor 10 has a configuration in which the motor 11 is housed in a motor casing 12 having waterproof performance. Inside the motor 11, a rotor and a stator (not shown) for rotating the spindle 13 are provided. Both ends of the spindle 13 are supported by bearings 14, respectively. Further, one end side of the spindle 13 is sealed with an O-ring 15 inside the motor casing 12, and protrudes to the outside of the motor casing 12. Further, an impeller 16 is attached to one end of a spindle 13 projecting to the outside of the motor casing 12.

The motor 11 is connected to the control panel 60 via a cable 17 penetrating the motor casing 12 and the pump casing 20. The control panel 60 supplies electric power to the motor 11 via the cable 17 and enables ON / OFF operation of the motor 11.

<Pump casing>
As shown in FIG. 8, the pump casing 20 is a hollow case extending along the longitudinal direction of the spindle 13. The above-mentioned submersible motor 10 is housed inside the pump casing 20. An impeller 16 of the submersible motor 10 is arranged on one end side of the pump casing 20, and an inflow port 21 for allowing water sucked by the impeller 16 to flow into the inside is opened. On the other hand, on the other end side of the pump casing 20, a discharge port 22 for discharging the water flowing into the inside to the outside is opened. A hose 50 is connected to the discharge port 22.

The water flowing into the inside from the inflow port 21 of the pump casing 20 passes through a flow path formed between the inner surface of the pump casing 20 and the outer surface of the motor casing 12, and is discharged from the discharge port 22 into the hose 50. The casing.

<Floating box>
In the suspend type submersible pump 1 of the present embodiment, the entire submersible pump 1 including the float 40 operates while floating between the water surface and the water bottom. The floating box 30 described below operates a "suspend function" in which the entire submersible pump 1 is suspended between the water surface and the water bottom.

As shown in FIG. 8, the floating box 30 is composed of a substantially U-shaped box body surrounding the left and right side surfaces and the back surface of the pump casing 20 described above. The entire floating box 30 has a symmetrical shape centered on the main shaft 13 of the submersible motor 10. A pair of flow paths 31 and 31 are provided inside the hollow of the floating box 30. Each flow path 31 also has a symmetrical shape about the main shaft 13 of the submersible motor 10. Each flow path 31 communicates with a single outlet 34. The outlet 34 is watertightly coupled to the inlet 21 of the pump casing 20.

As shown in FIGS. 1, 4, 6 and 7, the upper half of the left and right side walls constituting each flow path 31 of the floating box 30 is a pair of inclined surfaces 32 extending along the longitudinal direction of the pump casing 20. It is 32. Each inclined surface 32 is inclined upward from the outside to the center of the suspend type submersible pump 1. Each inclined surface 32 also has a symmetrical shape about the main shaft 13 of the submersible motor 10, has the same inclination angle and area as each other, and is located symmetrically. The inclination angle of each inclined surface 32 is not particularly limited, but is preferably in the range of about 30 ° to 60 ° with respect to the horizontal plane (see FIG. 4).

A suction port 33 composed of a large number of small holes is provided on substantially the entire surface of each inclined surface 32. As shown in FIG. 8, the water sucked from each suction port 33 passes through each flow path 31 and reaches the impeller 16 of the submersible motor 10 housed in the pump casing 20. Here, the above-mentioned "suspend function" is realized by sucking water from each suction port 33. That is, the force of sucking water from the suction port 33 that opens diagonally upward is an upward thrust that levitates the entire suspend type submersible pump 1. Due to this upward thrust, the suspend type submersible pump 1 floats between the water surface and the water bottom.

<Float>
As shown in FIGS. 1 to 7, the float 40 is formed of a plate-shaped foamed resin and is mounted on the pump casing 20 and the floating box 30 described above. The float 40 of the present embodiment has two features for complementing the "suspend function" of the floating box 30.

As a first feature, the buoyancy of the float 40 is smaller than the submersible weight of the suspend type submersible pump 1. Therefore, the float 40 cannot float the suspend type submersible pump 1 on the water surface. The buoyancy of the float 40 supplements the upward thrust generated by the floating box 30, and the suspend type submersible pump 1 is stopped and floated at an arbitrary position between the water surface and the water bottom.

As a second feature, the float 40 has a shape that does not interfere above the pair of suction ports 33 of the floating box 30 (see FIGS. 1 and 2). With this configuration, the suction of water from diagonally above each suction port 33 is not hindered by the float 40, and as a result, it is possible to efficiently generate an upward thrust.

<Control panel>
The control panel 60 shown in FIG. 8 is for controlling the suspend type submersible pump 1 put into water from land. The control panel 60 includes, for example, an ON / OFF switch and a reset switch for the submersible motor 10. Further, the control panel 60 includes a power supply circuit (not shown), and supplies power to the submersible motor 10 via the cable 17.

<Operation of suspend type submersible pump>
The operation of the suspend type submersible pump 1 of the present embodiment having the above configuration will be described with reference to FIG.

As shown in FIG. 9, the suspend type submersible pump 1 is put into water with one end side of the hose 50 connected to the discharge port 22. Although not shown, the other end of the hose 50 and the control panel 60 connected to the cable 17 are both located on land. The suspend type submersible pump 1 put into the water is remotely controlled by the control panel 60 located on land.

When the ON / OFF switch of the control panel 60 is operated to drive the submersible motor 10, the air inside the pump casing 20 and the floating box 30 is sucked out, and then water is sucked out from each suction port 33 of the floating box 30. Inhaled (see white arrow in FIG. 9). The force of sucking water from the suction port 33 that opens diagonally upward is an upward thrust that raises the entire suspend type submersible pump 1 (see the black arrow in FIG. 9). Due to this upward thrust, the suspend type submersible pump 1 operates while floating between the water surface 100 and the water bottom 200 (suspend function). The water sucked from each suction port 33 is discharged from the discharge port 22 and is sent to an arbitrary place on land through the hose 50.

<Action effect>
In the suspend type submersible pump 1 of the present embodiment, the entire submersible pump 1 including the float 40 has a water surface 100 and a water bottom 200 due to the upward thrust generated by sucking water from each suction port 33 and the buoyancy of the float 40. It works while floating in the middle of. As a result, the suspend type submersible pump 1 of the present embodiment is difficult to suck in the dust 101 floating on the water surface 100 and the dust 201 and mud 202 collected on the bottom 200, and can maintain the original suction capacity and discharge capacity. Will be. Therefore, the suspend type submersible pump 1 of the present embodiment is suitable for life-saving applications such as drainage of inland water due to flood, drainage of submersible water due to heavy rain, and pumping of fire-fighting water for extinguishing a fire.

<Other changes>
The suspend type submersible pump of the present invention is not limited to the configuration of the above-described embodiment. For example, in the above-described embodiment, the pump casing 20 and the floating box 30 are separate parts, and the inlet 21 and the outlet 34 are coupled to each other, but the configuration is not limited to this. The pump casing 20 and the floating box 30 may be an integral casing for accommodating the submersible motor 10.

Further, in the above-described embodiment, the inclination angles of the pair of inclined surfaces 32 and 32 are set to about 45 °, but the present invention is not limited to this configuration. The inclination angle of each inclined surface 32 is not particularly limited as long as it is inclined upward from the outside toward the center of the suspend type submersible pump 1. The tilt angle of each tilted surface 32 is changed according to the thrust required to suspend the suspend type submersible pump 1 in a desired position.

Further, the inclined surface 32 and the suction port 33 may be integrally molded on the wall portion of the floating box 30 made of synthetic resin, or may be separate parts retrofitted to the floating box 30 made of synthetic resin. For example, the metal punching metal as the inclined surface 32 and the suction port 33 may be detachably attached to the wall portion of the floating box 30 made of synthetic resin. When the inclined surface 32 and the suction port 33 are separate parts that can be attached to and detached from the wall portion of the floating box 30, the suction port 33 and the flow path 31 can be easily cleaned.

The shape of the large number of holes constituting the suction port 33 is not limited to the circular shape shown in the drawings, and may be holes or grooves having other shapes.

1 Suspend type submersible pump 10 Submersible motor 11 Motor 12 Motor casing 13 Main shaft 14 Bearing 15 O-ring 16 Impeller 17 Cable 20 Pump casing 21 Inflow port 22 Discharge port 30 Floating box 31 Flow path 32 Inclined surface 33 Suction port 34 Outlet 40 Float 50 Hose 60 Control panel 100 Water surface 200 Water bottom 101, 201 Garbage 202 Mud

Claims (6)

It is a submersible pump that is put into the water and discharges the water sucked by the impeller of the submersible motor.
A float that produces buoyancy smaller than the submersible weight of the submersible pump,
It is provided with a pair of flow paths provided substantially symmetrically with respect to the main axis of the submersible motor.
The wall portion defining each flow path is provided substantially symmetrically about the spindle of the submersible motor, and includes a pair of inclined surfaces that incline upward from the outside to the center of the submersible pump.
Each inclined surface is provided with a water suction port,
Each flow path reaches the impeller of the submersible motor from the suction port, and reaches the impeller of the submersible motor.
Due to the thrust generated by sucking water from each suction port and the buoyancy of the float, the entire submersible pump including the float operates while floating between the water surface and the water bottom.
Suspend type submersible pump featuring that. A hollow pump casing for accommodating the submersible motor inside and a hollow floating box attached to the outside of the pump casing are provided.
The pair of flow paths are provided inside the floating box.
The wall portion constituting the floating box includes the pair of inclined surfaces.
The suction port is provided on each inclined surface, and the suction port is provided.
The suspend type submersible pump according to claim 1, wherein each flow path reaches the impeller of the submersible motor housed in the pump casing from the suction port. The floating box is composed of a substantially U-shaped box body surrounding the left and right side surfaces and the back surface of the pump casing, and the left and right side walls constituting the floating box extend along the longitudinal direction of the pump casing. The suspend type submersible pump according to claim 2, wherein the suction port is provided on substantially the entire surface of each inclined surface including a surface. The suspend type submersible pump according to claim 2 or 3, wherein the float is formed of a plate-shaped foamed resin and mounted on the pump casing and the floating box. The suspend type submersible pump according to claim 4, wherein the float has a shape that does not interfere with the upper part of the pair of suction ports of the floating box. The suspend type submersible pump according to any one of claims 1 to 5, wherein the suction port is composed of a plurality of holes or grooves.

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