JP2001099085A - Vertical shaft pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical shaft pump facilitated in change of installation from a horizontal shaft pump to a vertical shaft pump and capable of reducing a load to be applied to a pump installed floor while reducing the weight of a motor base by lowering the projection height of the vertical shaft pump from the pump installed floor and a height from the pump installed floor to the top of the motor. SOLUTION: A reduction gear 14 is built in a discharge pipe 6 continuously provided to an upper side of a lifting pipe 5. With this structure, projection height H of a vertical shaft pump P is lowered to the height of a discharge pipe 9, and while a motor 20 can be installed in a motor base 22 having a small height dimension, and a height H4 from a pump installed floor 12 to the top of the motor 20 can be lowered. Furthermore, a load to be applied to the pump installed floor 12 can be reduced by using the light motor base 22 having a small height dimension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vertical pump,
Particularly, the present invention relates to a vertical shaft pump in which the height of the protrusion of the vertical axis pump from the pump installation floor and the height from the pump installation floor to the top of the prime mover are reduced to facilitate installation change from the horizontal shaft pump to the vertical shaft pump. .

[0002]

2. Description of the Related Art As shown in FIG. 4, a vertical shaft pump P comprises a vertical main shaft 2 rotatably supported by a plurality of bearings 1, 1,... And an impeller 3 fixed to the lower end of the main shaft 2. And a discharge bowl 4 which rotatably accommodates the impeller 3, and is connected to the upper side of the discharge bowl 4 and has a main shaft 2.
And a discharge curved pipe 6 connected to the upper side of the pumping pipe 5 and penetrating the main shaft 2 in a liquid-tight and rotatable manner and extending to the upper side. 4
A suction bell 7 is provided downward so as to communicate with the inside, and a discharge valve 8 and a drain pipe 9 are connected to the downstream side of the discharge curved pipe 6. The outlet of the drain pipe 9 faces the inside of the discharge water tank 10, and a flap valve 11 for preventing backflow is attached to this outlet.

The vertical pump P is installed on a pump installation floor 12 of a drainage pump station. A gantry 13 is provided on the pump installation floor 12.
The speed reducer 14 is installed on the gantry 13, and the upper end of the main shaft 2 led out above the discharge curved pipe 6 is
A vertical output rotation shaft 16 of the speed reducer 14 is connected via a coupling 15, and a horizontal input rotation shaft 17 of the speed reducer 14 is connected to a prime mover (for example, a motor) via couplings 18, 18 and an intermediate shaft 19. , Diesel engine) 20
Are connected to a horizontal output rotation shaft 21. Also,
The prime mover 20 is installed on a prime mover stand 22 erected on the pump installation floor 12.

On the other hand, a horizontal pump P shown in FIG.
A horizontal main shaft 23 rotatably supported by the main shaft 2
An impeller 3 fixed to the end of the casing 3, a casing 24 rotatably housing the impeller 3, and a casing 24 connected to the upstream side of the casing 24 and having the main shaft 23 penetrated in a liquid-tight and rotatable manner, and And a vertical suction pipe 26 connected to the upstream side of the suction bending pipe 25, and the suction bell 7 is provided downward so as to communicate with the inside of the suction pipe 26. A discharge valve 8 and a drain pipe 9 are connected to the downstream side, and the outlet of the drain pipe 9 faces the inside of the discharge water tank 10, and a flap valve 11 for preventing backflow is attached to this outlet.

[0005] A main shaft 23 led out to the side of the suction curved tube 25.
Is connected to a horizontal output rotation shaft 16 of the speed reducer 14 via a coupling 15, and the horizontal input rotation shaft 17 of the speed reducer 14 is connected to couplings 18, 18 and an intermediate shaft 19.
The motor 20 is connected to a horizontal output rotation shaft 21 of the prime mover 20 through the like.

[0006] However, the horizontal pump P needs to be filled with auxiliary equipment such as a vacuum pump at the time of starting the pump, which makes the starting operation of the pump complicated and takes a long time from the start of the starting operation to the start of the pump. It takes. For this reason, in the drainage station where the horizontal axis pump P is installed, it may be required to remove the horizontal axis pump P and change to the vertical axis pump P.

[0007]

However, in the conventional vertical shaft pump P shown in FIG. 4, a reduction gear 14 is installed on a gantry 13 erected on a pump installation floor 12 of a drainage station, and a discharge curved pipe 6 is provided. Exposed above the pump, the pump installation floor 1
The height H1 from 2 to the top of the speed reducer 14, that is, the protrusion height H1 of the vertical axis pump P from the pump installation floor 12 increases. In addition, since the speed reducer 14 is installed at a high position on the gantry 13, the height of the motor base 22
Is erected on the pump installation floor 12 and the prime mover 20 is installed on the prime mover base 22, so that the height H2 from the pump installation floor 12 to the top of the prime mover 20 increases.
An excessive load is applied to the pump installation floor 12.

The heights H1 and H2 are higher than the height H3 from the pump installation floor 12 to the ceiling 27 of the drainage pump building where the horizontal pump P is installed as shown in FIG.
Therefore, in order to remove the horizontal axis pump P and install the vertical axis pump P of FIG. 4 here, a large-scale construction for rebuilding the building is required.

In view of the above, the present invention reduces the height of the vertical pump from the pump installation floor and the height from the pump installation floor to the top of the prime mover to change the installation from the horizontal pump to the vertical pump. It is an object of the present invention to provide a vertical shaft pump capable of reducing the load applied to a pump installation floor by reducing the weight of a motor base while reducing the weight of a motor base.

[0010]

To achieve the above object, a vertical shaft pump according to the present invention comprises: a vertical main shaft rotatably supported by a bearing; an impeller fixed to a lower portion of the main shaft; A discharge bowl that rotatably accommodates the impeller, a vertically connected pumping pipe connected to the upper side of the discharge bowl, and a vertical pumping pipe that penetrates the main shaft, and a connectedly connected upper side of the pumping pipe. A vertical shaft pump, wherein the output rotation of the prime mover is transmitted to the main shaft via a speed reduction device, wherein the speed reduction device is built in the discharge tube, and the main shaft is used as a vertical output shaft of the speed reduction device. It is characterized in that it is configured to be able to rotate simultaneously, and is configured to be able to rotate simultaneously the input rotation shaft in the lateral direction of the speed reducer and the output rotation shaft of the motor.

According to the present invention, since the speed reducer is incorporated in the discharge pipe, the projecting height of the vertical axis pump can be reduced to the height of the discharge pipe. That is, as compared with the projection height of the conventional vertical axis pump, the height can be reduced by substantially the height of the conventional reduction gear. As described above, the projecting height of the vertical axis pump is reduced, so that a light-weight motor stand having a small height dimension can be erected on the pump installation floor, and the motor can be installed on this motor stand. And the height from the motor to the top of the prime mover can be reduced, and the load applied to the pump installation floor can be reduced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part. In addition, the bearing, impeller, discharge bowl, suction bell, and
A discharge valve, a drain pipe, a discharge water tank, a flap valve for backflow prevention, and the like are the same as those shown in FIGS. 4 and 5.
Descriptions of these structures and operations will be omitted, and the same or corresponding parts will be denoted by the same reference characters.

1 and 2, the speed reducer 14 is mounted in the discharge pipe 6 in a built-in manner. The outlet of the discharge pipe 6 is integrally connected to the upper end of the pumping pipe 5, and the outlet thereof communicates with the discharge valve 8. The upper end opening of the discharge pipe 6 is always closed by the lid member 6A. Therefore, by temporarily removing the lid member 6A and opening the upper end opening, the reduction gear 14 is connected to the discharge pipe 6 from the opened upper end opening.
Can be put in and out.

The speed reducer 14 has a vertical output rotating shaft 28.
And a horizontal input rotary shaft 29, which are provided with a plurality of bearings 3.
It is rotatably supported by the casing 31 via 0, 30,. A small bevel gear 3 is provided at the inner end of the horizontal input rotary shaft 29.
2, the small bevel gear 32 meshes with the large bevel gear 33 fixed to the output rotary shaft 28, thereby constituting a gear reducer having an orthogonal transformation transmission function.

The lower end of the output rotary shaft 28 is led out to the lower side of the casing 31 in a shaft-sealed state in which water is prevented from entering the casing 31 by a gland packing 34, and is simultaneously connected to the main shaft 2 via a coupling 35. It is rotatably connected. The distal end of the input rotary shaft 29 is led out from the side end of the casing 31 to the outside, and is coupled to the horizontal output rotary shaft 21 of the prime mover 20 via the couplings 18 and 18 and the intermediate shaft 19 so as to be simultaneously rotatable. ing. Further, the side end flange portion 31A of the casing 31 is fitted into a casing mounting hole 6B provided in the discharge pipe 6, and the side end flange portion 31A is provided.
A and the discharge pipe 6 are integrally connected by a support flange 36, so that the reduction gear 14 is built in and attached to the discharge pipe 6.

With such a configuration, the output of the prime mover 20 is the horizontal output rotary shaft 21 → the horizontal input rotary shaft 29 of the speed reducer 14 → the small bevel gear 32 → the large bevel gear 33 → the output rotary shaft 28.
→ transmitted to the main shaft 2 through the path of the coupling 35,
Is rotated at a reduced speed to operate the vertical pump P.

On the other hand, since the reduction gear 14 is built in the discharge pipe 9, the protrusion height H of the vertical pump P can be reduced to the height of the discharge pipe 9. That is, as compared with the projection height H1 of the conventional vertical pump P, the projection height H of the vertical pump P according to the present invention is reduced by an amount substantially equivalent to the height of the conventional reduction gear 14, and FIG. Can be made lower than the height H3 from the pump installation floor 12 to the ceiling 27 of the drainage pump building where the horizontal axis pump P is installed. In this way, the lower the protrusion height H of the vertical axis pump, the lower the height of the motor base 22
Can be erected on the pump installation floor 12 and the prime mover 20 can be installed on the prime mover base 22, so that the height H4 from the pump installation floor 12 to the top of the prime mover 20 is also reduced. Therefore, when it is required to remove the horizontal axis pump P and install the vertical axis pump P shown in FIG. Can be easily changed. Moreover,
The motor base 22 having a small height is lighter than the motor base 22 having a high height, so that the load applied to the pump installation floor 12 can be reduced.

In the above embodiment, the output rotary shaft 28 of the speed reducer 14 is described as being connected to the main shaft 2 via the coupling 35 so as to be able to rotate simultaneously. The output rotary shaft 28 of the reduction gear 14 and the main shaft 2 may be configured as a series of shafts.

[0019]

As described above, according to the present invention, since the speed reducer is incorporated in the discharge pipe, the projecting height of the vertical axis pump can be reduced to the height of the discharge pipe. In addition, since the protrusion height of the vertical axis pump is reduced, a motor base having a small height dimension can be erected on the pump installation floor, and the motor can be installed on the motor installation base 22. The height to the top is also lower. Therefore, if it is required to remove the horizontal pump and install a vertical pump here,
This eliminates the need for major construction work to rebuild the building, and makes it easy to change the installation from a horizontal axis pump to a vertical axis pump. In addition, the motor stand having a small height dimension is lighter in weight than a conventional motor stand having a high height dimension, so that the load applied to the pump installation floor can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is an enlarged sectional view showing another embodiment of the speed reducer.

FIG. 4 is an overall view showing a conventional vertical shaft pump.

FIG. 5 is an overall view showing a horizontal axis pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bearing 2 Main shaft 3 Impeller 4 Discharge bowl 5 Pumping pipe 6 Discharge curved pipe (discharge pipe) 14 Reduction gear (reduction gear) 16 Output rotation axis of reduction gear 17 Input rotation axis of reduction gear 20 Prime mover

Continued on the front page F term (reference) 3H022 AA03 BA03 BA06 CA01 CA07 CA11 CA26 DA07 DA20 3H032 AA01 AA12 3H034 AA01 BB01 BB07 BB16 CC03 CC05 CC06 DD14 DD28 EE05 EE12

Claims (1)

[Claims] 1. A longitudinal main shaft rotatably supported by a bearing, an impeller fixed to a lower portion of the main shaft, a discharge bowl rotatably housing the impeller, and an upper side of the discharge bowl. And a vertical pump pipe penetrating the main shaft, and a discharge pipe connected above the pump pipe, and the output rotation of the prime mover is transmitted to the main shaft via a reduction gear. In the vertical shaft pump described above, the speed reducer is built in the discharge pipe, and the main shaft is configured to be able to simultaneously rotate as a vertical output shaft of the speed reducer, and the horizontal input rotation of the speed reducer is performed. A vertical shaft pump, wherein the shaft is configured to be able to rotate simultaneously with the output rotation shaft of the prime mover.