JP6714413B2 - underwater pump - Google Patents

Description

The present invention relates to a submersible pump.

BACKGROUND ART Conventionally, there is known an underwater motor that absorbs and discharges water by rotating an impeller with a motor (see, for example, Patent Document 1).

In Patent Document 1, a pump casing in which an impeller is housed is arranged below a motor frame in which a motor is housed, and water sucked from a pump suction port opened at the bottom of the pump casing is discharged from the pump discharge port. A configuration for discharging is disclosed.

Here, when the entire submersible pump is submerged in water, the heat generated by the motor is released into the water from the motor frame and cools the motor, so the motor does not overheat and runs continuously for a long time. It can be performed.

However, when the submersible pump is operated when the water level is low and the motor part is exposed to the air, the heat generated by the motor is released from the motor frame into the air, which reduces the cooling efficiency of the motor. Markedly reduced. Therefore, if the submersible pump is continuously operated for a long time, the motor may be overheated and burned.

Therefore, Patent Document 2 discloses a configuration in which a water jacket is attached to the outside of the motor frame and the cooling liquid is sent to the water jacket to cool the heat generated inside the motor.

Japanese Utility Model Publication No. 5-14590 JP, 2002-310088, A

However, in the invention of Patent Document 2, since it is necessary to mount a water jacket, there is a problem that the structure of the entire pump becomes complicated and the cost increases. Further, since a water jacket cannot be retrofitted to an existing submersible pump, there is a problem that the submersible pump itself must be replaced when used in an environment where the water level is low.

The present invention has been made in view of the above points, and an object thereof is to make it possible to appropriately secure the cooling performance of a motor with a relatively simple configuration in accordance with the water level of a use environment.

The present invention is directed to a submersible pump including a pump body provided with a pump unit having an impeller and a motor unit having a motor for driving the impeller, and has taken the following solving means.

That is, a first aspect of the present invention is a support leg that supports the pump body in a vertical posture in which the pump unit and the motor unit are vertically aligned,
A support base that is detachably attached to the pump body, and that supports the pump body on a support surface of an upper surface in a horizontal orientation in which the pump unit and the motor unit are laterally aligned;
It is wrapped around the outer peripheral surface of the pump body, and comprises a fixing band whose length is adjustable,
The support base is detachably attached to the pump body by the fixing band.

According to the first aspect of the invention, the pump body can be supported in either a vertical posture or a horizontal posture. Therefore, even if you do not have two types of submersible pumps, one for vertical installation and one for horizontal installation, you can easily prepare one submersible pump for vertical installation. Since the submersible pump of the present invention can be configured, it is possible to cope with various water levels in the usage environment, and inventory management can be easily performed.

For example, in an environment in which the water level is high and the entire submersible pump is submerged in water, it is preferable to support the pump body in a vertical position because the installation area is small. On the other hand, in an environment where the water level is low and the motor section is exposed to the air when the pump body is placed vertically, by supporting the pump body horizontally, the heat generated by the motor is Since it is cooled by water, it is possible to prevent the motor from overheating.

In addition, the support base can be attached to and detached from the pump body by a fixed band. As a result, the support base can be attached to pump main bodies having different outer diameters only by adjusting the total length of the fixing band. Therefore, the support base can be attached to the existing submersible pump.

The second invention is the same as the first invention,
An insertion hole is formed in the support base,
The support base is detachably attached to the pump main body by inserting and fixing the fixing band into the insertion hole.

In the second aspect, the fixing band can be fixed to the support base by inserting it into the insertion hole of the support base. As a result, the support base can be attached to pump main bodies having different outer diameters only by adjusting the total length of the fixing band. Therefore, the support base can be attached to the existing submersible pump.

A third invention is the first or second invention,
The pump unit has a pump casing that houses the impeller,
The pump casing has a suction port formed at a position that opens in the lateral direction when the pump body is in a horizontal posture.
It is characterized in that it comprises a suction port cover which is detachably attached to the pump casing, the upstream end of which opens downward, and the downstream end of which is connected to the suction port.

According to the third aspect of the invention, the suction port is opened in the pump casing in the horizontal direction when the pump body is in the horizontal posture. A suction port cover is attached to the suction port. The upstream end of the suction port cover opens downward. As a result, even in an environment where the water level is low, it is possible to suppress the generation of suction vortices due to the suction of air together with water from the suction port.

4th invention is any one among 1st thru|or 3rd invention, Comprising:
A plurality of curved support surfaces having different radii of curvature are formed on the support base.

According to the fourth aspect of the present invention, since the support base is formed with the plurality of curved support surfaces, one type of support base can also be used as a support for a plurality of pump main bodies having different outer diameters. It can be managed easily.

According to the present invention, since the pump main body can be supported in any of the vertical posture and the horizontal posture, it is possible to cope with various water levels in the usage environment and inventory management can be easily performed.

It is a side sectional view showing composition of a pump body of a submersible pump concerning this Embodiment 1. It is a perspective view which shows the structure of a submersible pump. It is a side view which shows the state which supported the submersible pump in the horizontal posture. It is a front view which shows the structure of a support stand. It is a perspective view which shows the structure of a support stand. It is a perspective view which shows the structure of an inlet cover. It is a side view which shows the state which supported the submersible pump which concerns on this Embodiment 2 in the horizontal posture. It is a side view which shows the state which supported the submersible pump which concerns on this Embodiment 3 in the horizontal posture. It is a side view which shows the state which supported the submersible pump which concerns on this Embodiment 4 in the horizontal posture. It is a side view which shows the state which supported the submersible pump which concerns on this Embodiment 5 in the horizontal installation posture. It is a side view which shows the state which supported the submersible pump which concerns on the present reference example 1 in a horizontal posture. It is a side view which shows the state which supported the submersible pump which concerns on the present reference example 2 in a horizontal posture.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the following description of the preferred embodiments is merely an example in essence, and is not intended to limit the present invention, its application, or its use.

<<Embodiment 1>>
As shown in FIG. 1, the submersible pump 10 includes a pump body 15 provided with a motor unit 20 and a pump unit 30. The motor unit 20 includes a motor 23 including a stator 21 and a rotor 22, a motor casing 24 that covers the stator 21 of the motor 23, and a head cover 28 that is attached to the upper end of the motor casing 24. The rotation shaft 25 of the motor 23 is arranged so as to extend in the vertical direction. The motor casing 24 is made of stainless steel. The head cover 28 is made of a resin material.

The motor casing 24 is formed in a substantially bottomed cylindrical shape with one end closed. Bearings 26 that rotatably support an upper end portion and a lower end portion of the rotary shaft 25 are mounted and supported on an upper bearing bracket 27 and a bottom portion of the motor casing 24, respectively, on an upper portion and a lower portion of the motor casing 24.

A flange portion 24 a is provided on the upper edge portion of the motor casing 24. A flange portion 28a is similarly provided on the lower edge portion of the head cover 28. The head cover 28 is attached to the upper end of the motor casing 24 by fastening the flange portions 24a, 28a together with fastening bolts 55. An accommodation space 29 is provided inside the head cover 28, and various electrical parts (not shown) are accommodated in the accommodation space 29.

The pump unit 30 includes an impeller 31 connected to the rotating shaft 25 of the motor 23, and a pump casing 32 that houses the impeller 31. The pump casing 32 is made of a resin material.

The pump casing 32 has a suction port 33 which is a suction port of water, and a discharge port 34 which discharges the sucked water. The suction port 33 is formed on the bottom surface of the pump casing 32 and opens downward. The discharge port 34 is formed in a portion of the pump casing 32 that bulges to the left of the motor casing 24 in FIG. 1, and opens upward. The discharge port 34 is connected to a pipe (not shown).

A mechanical seal 36 that seals the rotating shaft 25 is provided between the pump unit 30 and the motor casing 24. The mechanical seal 36 prevents water from entering the motor casing 24. Instead of the mechanical seal 36, an oil seal, a gland packing, or the like can be used.

In the lower part of the pump casing 32, three support legs 35 extending downward are arranged at predetermined intervals (see also FIG. 2). The support leg 35 is for supporting the pump body 15 in a vertically placed posture in which the motor unit 20 and the pump unit 30 are vertically aligned and the rotation shaft 25 of the motor 23 is vertically oriented.

By the way, as shown in FIG. 1, in an environment in which the water level H is high and the entire submersible pump 10 is submerged in water, it is preferable to support the pump body 15 in a vertical position because the installation area is small.

On the other hand, in the environment where the water level H is low and the motor unit 20 is exposed to the air when the pump body 15 is placed vertically, the heat generated in the motor unit 20 is not cooled by water, so the motor unit 20 is not cooled. 20 will be overheated.

In view of this, in the present embodiment, the pump body 15 is placed in a vertical position in which the motor unit 20 and the pump unit 30 are aligned in the vertical direction (see FIG. 1), and the motor unit 20 and the pump unit 30 are aligned in the horizontal direction. It can be supported in any of the horizontal postures (see FIG. 2). Hereinafter, this point will be described in detail.

As shown in FIGS. 2 and 3, the motor unit 20 and the pump unit 30 are arranged side by side in a horizontal direction, and the support base 40 is provided to support the pump body 15 in a horizontal posture in which the rotation shaft 25 of the motor 23 is horizontal. .. The support base 40 is arranged at a position to support the outer peripheral surface of the motor casing 24 of the pump body 15 in the horizontal position. In the horizontal posture, the support table 40 and the outer peripheral surface of the pump casing 32 keep the submersible pump 10 horizontal.

The support base 40 is removably attached to the pump body 15 by a fixed band 45 whose length is adjustable by being wound around the outer peripheral surface of the pump body 15 (the outer peripheral surface of the motor casing 24 in FIG. 3). ing. The fixing band 45 can be fixed to the support base 40 by inserting it into the insertion hole 46 of the support base 40. Accordingly, the support base 40 can be attached to the existing submersible pump 10 only by adjusting the total length of the fixing band 45.

Further, as shown in FIGS. 4 and 5, on the upper surface of the support base 40, two curved support surfaces 41 and 42 having different radii of curvature are formed. In the example shown in FIG. 4, a first curved support surface 41 corresponding to the motor casing 24 having a large outer diameter and a second curved support surface 42 corresponding to the motor casing 24 having a small outer diameter are formed. Accordingly, one type of support base 40 can be used as a support for the submersible pumps 10 having different outer diameters.

Legs 44 are attached to the lower portion of the support base 40 at intervals in the width direction. The leg portion 44 is made of an elastic body such as rubber and can obtain a vibration damping effect. Further, by attaching the leg portions 44, it is possible to prevent the support base 40 from being rubbed against the ground by vibration and worn.

As shown in FIG. 3, when the pump body 15 is supported in a horizontal posture, the suction port 33 opens in the lateral direction. Here, if the water level H is low, air may be sucked together with water from the suction port 33, and a suction vortex may be generated. Therefore, in the present embodiment, the suction port cover 50 is attached to the suction port 33.

As shown in FIGS. 2 and 3, the suction port cover 50 includes a ring-shaped mounting flange 51 in which through holes 51a (see FIG. 6) are formed at intervals in the circumferential direction, and a thickness direction from the mounting flange 51. And a cover portion 52 that projects and opens downward.

Here, a plurality of mounting posts 38 are provided around the suction port 33 of the pump casing 32 at intervals in the circumferential direction, and the mounting flange 51 of the suction port cover 50 is inserted into the through hole 51a. It is fixed by fastening the fastening bolts 55 to the mounting posts 38.

As a result, the suction port cover 50 is detachably attached to the pump casing 32 with the upstream end opening downward and the downstream end connected to the suction port 33.

By doing so, even in an environment where the water level H is low, water is sucked from below by the suction port cover 50, so that suction vortices due to sucking air together with water from the suction port 33 are generated. Can be suppressed.

As described above, according to the submersible pump 10 according to the present embodiment, since the pump body 15 can be supported in either the vertical posture or the horizontal posture, it is possible to cope with various water levels in the usage environment. , Inventory management can be performed easily.

<<Embodiment 2>>
FIG. 7 is a side view showing a state in which the submersible pump according to the second embodiment is supported in a horizontal position. Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, and only different points will be described.

As shown in FIG. 7, the submersible pump 10 is in a horizontal posture in which the motor unit 20 and the pump unit 30 are arranged side by side. The support base 40 is arranged at a position to support the outer peripheral surface of the motor casing 24 of the pump body 15 in the horizontal position. A cushion member 47 made of an elastic material such as rubber is attached to the lower edge of the pump casing 32. Thereby, in the horizontal posture, the submersible pump 10 is maintained horizontally by the support base 40 and the cushion member 47.

By thus sandwiching the cushion member 47 with the ground, it is possible to prevent the pump casing 32 from being rubbed against the ground and worn.

<<Embodiment 3>>
FIG. 8 is a side view showing a state in which the submersible pump according to the third embodiment is supported in a horizontal position. As shown in FIG. 8, the submersible pump 10 is in a horizontal posture in which the motor unit 20 and the pump unit 30 are arranged side by side.

The support base 40 is arranged at a position to support the outer peripheral surface of the motor casing 24 of the pump body 15 in the horizontal position. The height of the support base 40 is set so that the lower end of the pump casing 32 is lifted from the ground. The length (left and right length in FIG. 8) of the support surface of the support base 40 is set to be longer than that of the first embodiment.

In this way, by lifting and supporting the pump main body 15 only by the support base 40, it is possible to prevent the pump casing 32 from being rubbed against the ground and worn. Further, by increasing the support area of the support surface of the support base 40, the pump body 15 can be stably supported.

<<Embodiment 4>>
FIG. 9 is a side view showing a state in which the submersible pump according to the fourth embodiment is supported in a horizontal position. As shown in FIG. 9, the submersible pump 10 is in a horizontal posture in which the motor unit 20 and the pump unit 30 are arranged side by side.

The support base 40 is arranged at a position to support the outer peripheral surface of the head cover 28 of the pump body 15 in the horizontal posture. In the horizontal posture, the support table 40 and the outer peripheral surface of the pump casing 32 keep the submersible pump 10 horizontal.

As described above, by disposing the support base 40 on the lateral end side of the pump body 15, the pump body 15 can be stably supported on both lateral ends.

<<Fifth Embodiment>>
FIG. 10 is a side view showing a state in which the submersible pump according to the fifth embodiment is supported in a horizontal position. As shown in FIG. 10, the submersible pump 10 is in a horizontal posture in which a motor unit 20 and a pump unit 30 are arranged side by side.

The support bases 40 are respectively arranged at the outer peripheral surface of the head cover 28 of the pump main body 15 in the horizontal position and the position supporting the outer peripheral surface of the motor casing 24. The height of the support base 40 is set so that the lower end of the pump casing 32 is lifted from the ground. As a result, the submersible pump 10 is horizontally maintained by the two support bases 40 in the horizontal posture.

In this way, by lifting and supporting the pump main body 15 by the two support bases 40, it is possible to prevent the pump casing 32 from being rubbed against the ground and worn.

<<Reference Example 1>>
FIG. 11 is a side view showing a state in which the submersible pump according to the present reference example 1 is supported in a horizontal position. As shown in FIG. 11, the submersible pump 10 is in a horizontal posture in which the motor unit 20 and the pump unit 30 are arranged side by side.

A support bracket 48 as a support is attached to the flange portion 28a of the head cover 28. The support bracket 48 is composed of a plate-like member that is bent in an L-shaped cross section, and is fastened together with the flange portion 28a by a fastening bolt 55 that fastens the flange portion 28a of the head cover 28 to the motor casing 24. As a result, in the horizontal position, the support bracket 48 and the outer peripheral surface of the pump casing 32 keep the submersible pump 10 horizontal.

In this way, if the support bracket 48 is fastened together with the flange portion 28a, the pump main bodies 15 having various outer diameters can be mounted without using a support base having a support surface corresponding to the pump main bodies 15 having different outer diameters. Can be supported.

<<Reference example 2>>
FIG. 12 is a side view showing a state in which the submersible pump according to the second reference example is supported in a horizontal posture. As shown in FIG. 12, the submersible pump 10 is in a horizontally placed posture in which the motor unit 20 and the pump unit 30 are arranged side by side.

A support bracket 48 as a support is attached to the flange portion 28a of the head cover 28. The support bracket 48 is composed of a plate-like member that is bent in an L-shaped cross section, and is fastened together with the flange portion 28a by a fastening bolt 55 that fastens the flange portion 28a of the head cover 28 to the motor casing 24.

Similarly, a support bracket 48 as a support is attached to the suction port cover 50. The support bracket 48 is fastened together with a fastening bolt 55 that attaches the suction port cover 50 to the pump casing 32. As a result, the submersible pump 10 is maintained horizontally by the two support brackets 48 in the horizontal posture.

In this way, by lifting and supporting the pump main body 15 with the two support brackets 48, it is possible to prevent the pump casing 32 from being rubbed against the ground and worn.

<<Other Embodiments>>
In addition, in each of the embodiments, the opening direction of the suction port cover 50 can be changed to the downward direction even when the lower side is changed when the pump body 15 is placed horizontally. The openings 38 may be arranged at equal intervals in the circumferential direction, or the inlet port cover 50 may be attached by a housing joint or a ferrule joint so that the opening direction can be freely adjusted.

Further, in order to adjust the height of the discharge port 34 to the position of the discharge pipe which is fixed in advance or to adjust the fixed angle of the pump to be horizontal, the protrusion amount of the leg portion 44 of the support base 40 is changed. The support height may be adjustable, for example.

INDUSTRIAL APPLICABILITY As described above, the present invention has a relatively simple structure and can obtain a highly practical effect that the cooling performance of the motor can be appropriately secured according to the water level of the use environment, and thus is extremely useful and industrial. The above availability is high.

DESCRIPTION OF SYMBOLS 10 Submersible pump 15 Pump body 20 Motor part 23 Motor 30 Pump part 31 Impeller 32 Pump casing 33 Suction port 35 Support leg 40 Support base 41 First curved support surface 42 Second curved support surface 45 Fixed band 50 Suction port cover

Claims (4)

A submersible pump including a pump body having a pump section having an impeller and a motor section having a motor for driving the impeller,
A support leg that supports the pump body in a vertically placed posture in which the pump unit and the motor unit are vertically aligned,
A support base that is detachably attached to the pump body, and that supports the pump body on a support surface of an upper surface in a horizontal orientation in which the pump unit and the motor unit are laterally aligned;
It is wrapped around the outer peripheral surface of the pump body, and comprises a fixing band whose length is adjustable,
The submersible pump, wherein the support base is detachably attached to the pump body by the fixing band. In claim 1,
An insertion hole is formed in the support base,
The submersible pump, wherein the support base is detachably attached to the pump main body by inserting and fixing the fixing band into the insertion hole. In claim 1 or 2,
The pump unit has a pump casing that houses the impeller,
The pump casing has a suction port formed at a position that opens in the lateral direction when the pump body is in a horizontal posture.
A submersible pump comprising a suction port cover detachably attached to the pump casing, having an upstream end opening downward and a downstream end connected to the suction port. In any one of Claim 1 thru|or 3,
The submersible pump according to claim 1, wherein the support base is formed with a plurality of curved support surfaces having different radii of curvature.

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