JP2003129988A - Vertical shaft pump with built-in direction changer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical shaft pump with a built-in direction changer, allowing easy visible identification and inspection of an interior of the direction changer from the outside of a discharge pipe even during operating the pump. SOLUTION: An inspection window 23 on the side of the direction changer and an inspection window on the side of a discharge elbow are provided at symmetrical positions on both right and left sides on an axis C4 which is parallel to an axis C3 perpendicular to an axis C2 through an axis C1 and displaced to the side of a small bevel gear 45 beyond the axis C3 and which passes through the small bevel gear 45. The inspection windows 23, 24 are connected to each other with a straight-pipe connection cylinder 25 which is mounted between a wall portion of the direction changer 14 and a wall portion of the discharge elbow 6 with water tightness and which has both axial ends open. A transparent cover 50 formed with a transparent plate of an acrylic resin or the like is detachably fastened to the opening at the outer end of the connection cylinder 25 with water tightness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical shaft pump with a built-in direction changing device in which the height of protrusion of a vertical shaft pump from the floor of the pump installation and the height from the floor of the pump installation to the top of the motor are reduced.

[0002]

2. Description of the Related Art By lowering the protruding height of a vertical shaft pump from a floor on which a pump is installed, a prime mover having a low height and a low weight is erected on the floor on which the pump is installed, and the prime mover is installed on the prime mover. The applicant of the present invention has already proposed a vertical shaft pump with a built-in direction changing device that can reduce the height from the floor of the pump installation to the top of the prime mover and reduce the load applied to the floor of the pump installation. (Japanese Patent Application 2001
-106993).

The vertical pump with built-in direction changer is constructed as shown in FIGS. In this figure, 14 indicates a direction changer. This direction changer 14 orthogonally converts (direction changes) the output rotation of the prime mover 20, and the main shaft 2
And a lid portion 2 for opening and closing the upward opening 27 provided at the upper end of the discharge elbow (discharge pipe) 6 so as to be opened and closed.
In the state of being fixed to 8, the discharge elbow 6 is built in so that it can be taken in and out from the opening 27. That is, by closing the opening 27 with the lid 28, the direction changing device 14 is built in the discharge elbow 6, and for maintenance or the like, the direction changing device 14 is taken out from the discharge elbow 6 by pulling up the lid 28. be able to. In addition, a lateral opening 27A is provided on the side surface of the discharge elbow 6.

The direction changer 14 has a casing 29 having a vertical axis C1 and a horizontal axis C2 orthogonal to the vertical axis C1 and an inner end thereof is watertightly attached to a side wall of the casing 29 and extends laterally. The bearing case 30, the output rotary shaft 31 on the vertical axis C1, and the input rotary shaft 3 on the horizontal axis C2.
2, the inside of the casing 29 is divided into two upper and lower chambers including an upper direction changing mechanism chamber 33 and a lower mechanical seal chamber 34, and the inner end surface of the bearing case 30 has a direction changing mechanism chamber 33. Facing.

The lid portion 28 has a central boss portion 28A which is open at both ends in the direction of the vertical axis C1, a large-diameter flange portion 28B formed at the upper end portion of the central boss portion 28A, and a lower end portion of the central boss portion 28A. Small diameter flange portion 28C formed nearby
It has and. Then, the small-diameter flange portion 28C is placed on the outer peripheral edge portion of the upper end opening portion 35 of the casing 29 with a seal ring (not shown) interposed therebetween, and is fastened by a plurality of bolts (not shown). The casing 29 of the direction changer 14 is watertightly and detachably fixed. Further, the outer peripheral edge portion of the large-diameter flange portion 28B is placed on the flange portion 27B on the outer periphery of the opening portion 27 of the discharge elbow 6 through a seal ring (not shown), and a plurality of bolts and nuts (not shown) are used. By fastening, the opening portion 27 is closed by the lid portion 28 in a watertight manner and can be opened and closed.

The output rotary shaft 31 has two upper and lower bearings 37A and 37B in a bearing case 36 assembled to the lower end of the central boss 28A of the lid 28, and a direction changing mechanism chamber 33 in the casing 29. It is rotatably supported by a bearing 37C supported by a bearing support 38 provided and extends below the casing 29. Further, these bearings 37A, 37B, 37C receive the axial thrust during pump operation including the weight of the rotating body such as the output rotary shaft 31, the main shaft 2 and the impeller 3.

The input rotary shaft 32 is rotatably supported by bearings 39A, 39B and 39C in the bearing case 30 so as not to move in the direction of the horizontal axis C2. The bearing case 30 is led out to the outside of the discharge elbow 6 through the lateral opening 27A, and the input rotating shaft 3 is provided outside the bearing case 30.
The outer edge of 2 extends. Further, the outer end opening of the bearing case 30 has a seal ring 4 with which the input rotary shaft 32 is in sliding contact.
It is water-tightly closed by the bearing cover 41 in which 0 is fitted in the center. The bearing cover 41 is pressed against the outer end surface of the bearing case 30 by fastening the cover retainer 42 to the outer end portion of the bearing case 30 with a bolt (not shown).

A holding cylinder 43 is externally fitted to a part of the side wall of the bearing case 30 and the casing 29, and the holding cylinder 43 is inserted into the lateral opening 27A from the outside of the discharge elbow 6, and a seal ring (not shown) is inserted. The holding tube 43 is watertightly and detachably fixed to the discharge elbow 6 by bringing the outer end flange portion 43A into contact with the outer circumference of the opening portion 27A via the interposition and fastening them with a plurality of bolts (not shown).

A small bevel gear 45 is provided at the inner end of the input rotary shaft 32.
Is formed or fixed, and the small bevel gear 45 meshes with the large bevel gear 46 fixed to the output rotary shaft 31,
It constitutes a gear reducer with orthogonal transformation transmission function,
The small bevel gear 45 and the large bevel gear 46 are located inside the direction changing mechanism chamber 33. Further, the mechanical seal chamber 34 is provided with upper and lower two-stage mechanical seals 47A and 47B,
The upper mechanical seal 47A prevents the lubricating oil 48 in the direction changing mechanism chamber 33 from leaking to the mechanical seal chamber 34, and prevents the lubricating oil 49 in the mechanical sealing chamber 34 from leaking to the direction changing mechanism chamber 33. The lower mechanical seal 47B prevents the pumped water in the discharge elbow 6 from entering the mechanical seal chamber 34, and prevents the lubricating oil 49 in the mechanical seal chamber 34 from leaking into the discharge elbow 6 to prevent the output rotary shaft from rotating. 31 is rotatably and watertightly sealed in the shaft.

The lower end of the output rotary shaft 31 is the coupling 1
5, the outer end of the input rotary shaft 32 is coupled to the main shaft 2 so as to be rotatable at the same time.
9, the output rotary shaft 21 in the horizontal direction of the prime mover 20
Are connected so that they can rotate simultaneously.

On the other hand, the central boss portion 28A of the lid portion 28
The upper end opening is closed airtight by the lid 52 to prevent dust from entering the bearings 37A and 37B in the bearing case 36. Further, the casing 29 is supplied with a lubricating oil 49 into the mechanical seal chamber 34 to lubricate and seal the mechanical seals 47A and 47B, and at the time of replacing or inspecting the lubricating oil 49, the lubricating oil 49 is discharged. A passage 58 is provided, and the supply / drain oil passage 58 is closed so that a lubricating oil supply / drain pipe 59 can be connected.

On the other hand, as shown in FIG.
In the direction changing mechanism chamber 33 and the discharge elbow 6, inspection windows 23 and 24 through which the inside of the direction changing mechanism chamber 33 can be viewed are provided at symmetrical positions on both left and right sides on an axis C3 that passes through the axis C1 and is orthogonal to the axis C2, The inspection window 23 is detachably and watertightly closed by the lid 23A, and the inspection window 24 is detachably and watertightly closed by the lid 24A. Therefore, when the operation of the pump P is stopped, by removing the lid 23A and the lid 24A, the mesh state of the small bevel gear 45 and the large bevel gear 46 inside the direction changing mechanism chamber 33 and the tooth surfaces of the both bevel gears 45, 46 can be changed. The wear elbow 6 can be inspected from outside the discharge elbow 6. In addition, in FIG.
P is a vertical pump, 1 is a plurality of bearings, 3 is an impeller, 4 is a discharge bowl, 5 is a pump pipe, 7 is a suction bell, 8 is a discharge valve, 9
Is a drain pipe, 10 is a discharge water tank, and 11 is a flap valve for preventing backflow.

With such a configuration, the output of the prime mover 20 is the horizontal output rotary shaft 21 → the input rotary shaft 32 of the direction changer 14 → small bevel gear 45 → large bevel gear 46 → output rotary shaft 31 → The power is transmitted to the main shaft 2 through the power transmission path of the coupling 50, the main shaft 2 is decelerated and rotated, and the vertical shaft pump P is operated. Further, since the direction changer 14 is configured by the gear reducer having the orthogonal conversion transmission function in which the small bevel gear 45 on the input rotary shaft 32 side and the large bevel gear 46 on the output rotary shaft 31 side are meshed with each other, the prime mover 20 It is possible to decelerate the high rotation speed to a required rotation speed of the vertical shaft pump P at a predetermined reduction ratio.

Moreover, since the direction changer 14 is built in the discharge elbow 6, the protruding height H of the vertical shaft pump P can be reduced to the height of the discharge elbow 6. Therefore, a low and lightweight prime mover base 22 can be erected on the pump installation floor portion 12, and the prime mover 20 can be installed on the prime mover base 22. Therefore, the height H4 from the pump installation floor portion 12 to the top of the prime mover 20 is In addition to lowering the load, the effect of reducing the load applied to the pump installation floor 12 is obtained.

[0015]

In the conventional vertical shaft pump with a built-in direction changer, when the operation of the pump P is stopped,
By removing the lid 23A and the lid 24A, it is possible to check the meshing state of the small bevel gear 45 and the large bevel gear 46 inside the direction changing mechanism chamber 33 and the wear state of the tooth surfaces of both bevel gears 45 and 46. Can be done from outside. However, during the operation of the pump P, the inspection windows 23 and 24 are closed by the lid 23A and the lid 24A, so that the above-mentioned inspection cannot be performed from the outside of the discharge elbow 6. Therefore, the lid 2
3A and the lid 24A are formed of a transparent plate such as acrylic resin so that the above-mentioned inspection can be performed from outside the discharge elbow 6 through the transparent lid 23A and the lid 24A while the pump P is operating. It is possible. However, since the pumped water flowing in the discharge elbow 6 has high turbidity and low transparency, even if the lid 23A and the lid 24A are formed of transparent plates, the discharge elbow 6 is in operation during operation of the pump P.
It is difficult to perform the above inspection from inside and outside. Therefore, it is considered necessary to configure so that the inside of the direction changing mechanism chamber 33 of the direction changing device 14 can be easily inspected even while the pump P is operating.

Therefore, the present invention is
An object of the present invention is to provide a vertical shaft pump with a built-in direction changer that allows the inside of the direction changer to be easily visually checked and inspected from the outside of the discharge pipe.

[0017]

In order to achieve the above-mentioned object, a vertical shaft pump with a built-in direction changer according to the invention of claim 1 includes a longitudinal main shaft rotatably supported by a bearing,
An impeller fixed to the lower part of the main shaft, a discharge bowl in which the impeller is rotatably accommodated, and a vertical pumping pipe that is connected to the upper side of the discharge bowl and penetrates the main shaft. , A discharge pipe connected to the upper side of the pumping pipe, the discharge pipe having a built-in direction changer for changing the direction of the output rotation of the prime mover and transmitting the change to the main shaft. In a vertical axis pump with a built-in direction changer in which a check window for visually observing the inside of the direction changer is installed in a watertight manner, the inspection window on the direction changer side and the inspection window on the discharge pipe side are between the direction changer and the discharge pipe. It is characterized in that they are connected to each other by a connecting tube which is installed in a watertight manner and installed in a watertight manner.

Further, it is preferable that the cross-sectional shape of the connecting cylinder is formed in a streamlined shape for reducing the resistance of the pumped-up water in the discharge pipe.

According to the invention described in claim 1, the influence of pumping (pumping having high turbidity and low transparency) on the inspection window on the direction changer side and the inspection window on the discharge pipe side during the operation of the pump is connected. Since it can be reliably avoided by the cylinder, it is possible to easily inspect by visually observing the inside of the direction changer from the inspection window on the discharge pipe side, that is, the outside of the discharge pipe through the connecting cylinder, even while the pump is operating. .

Further, since the cross-sectional shape of the connecting cylinder is formed in a streamlined shape to reduce the resistance of the flow pumped water in the discharge pipe, the smoothing flow of the pumped water is ensured by the rectifying action and the loss in the discharge pipe is reduced. As a result, a decrease in pump efficiency can be suppressed.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an essential part of an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view showing an essential part, and FIG. 1 corresponds to FIG. In addition, the plurality of bearings 1, the impeller 3, the discharge bowl 4, the pumping pipe 5, the suction bell 7, the discharge valve 8, the discharge pipe 9, the discharge water tank 10, the backflow prevention flap valve 11 and the plurality of bearings in FIG. Since the structure shown is the same as that of the present invention, the illustration thereof is omitted, and the same or corresponding portions as those in FIGS. To do.

In FIGS. 1 and 2, symmetrical positions on both left and right sides on an axis C4 which passes through the axis C1 and is parallel to the axis C3 orthogonal to the axis C2, that is, parallel to the axis C3.
3, the inspection window 23 on the direction changer side and the inspection window 24 on the discharge elbow side are provided at symmetrical positions on both left and right sides on an axis C4 passing through the small bevel gear 45 and passing through the small bevel gear 45. The inspection windows 23 and 24 are connected to each other by a connecting tube 25 which is installed between the wall portion of the direction changer 14 and the wall portion of the discharge elbow 6 in a watertight manner and which is a straight tube and has both axial ends opened. .

That is, the inner end flange portion of the connecting tube 25 is watertightly fitted into the inspection window 23 on the direction changer side with the O-ring (seal ring) 26A interposed, and the outer end flange portion of the connecting tube 25 is , A plurality of bolts (not shown) fitted in the inspection window 24 on the discharge elbow side and abutted on the outer surface of the outer peripheral receiving portion 24A of the inspection window 24 with an O-ring (seal ring) 26C interposed. ) By the outer peripheral receiving portion 2
4A is detachably and watertightly fastened, and the outer end opening of the connecting tube 25 has an O-ring (seal ring) 2
In a state in which the transparent lid 50 formed of a transparent plate such as an acrylic resin is in contact with 6D interposed, a plurality of bolts (not shown) are detachably and watertightly fastened. Further, it is preferable that the cross-sectional shape of the connecting cylinder 25 be formed in a streamlined shape that reduces the resistance of the pumped water F flowing in the discharge elbow 6, as shown in FIG.

In this way, the inspection window 23 on the direction changer side and the inspection window 24 on the discharge elbow side are installed between the wall portion of the direction change mechanism chamber 33 of the direction changer 14 and the wall portion of the discharge elbow 6. Since they are connected to each other by the watertightly attached connecting pipe 25, the influence of the pumping water F having high turbidity and low transparency on the inspection window 23 on the direction changer side and the inspection window 24 on the discharge elbow side during the operation of the pump P is not affected. Since it can be reliably avoided by the connecting cylinder 25, the inside of the direction changing mechanism chamber 33 can be visually inspected easily from the transparent lid 50 outside the discharge elbow 6 via the connecting cylinder 25 even while the pump P is operating. be able to.

Further, the inspection window 23 on the direction changer side and the inspection window 24 on the discharge elbow side are displaced toward the small bevel gear 45 side with respect to the axis C3 so as to be symmetrical on the left and right sides on the axis C4 passing through the small bevel gear 45. Since the inspection windows 23 and 24 are connected to each other by the connecting tube 25, the small bevel gear 45 and the large bevel gear are arranged at symmetrical positions on both right and left sides on the axis C4 passing through the small bevel gear 45. 46 meshing state and both bevel gears 45, 4
It is possible to more accurately inspect the wear state of the tooth surface of No. 6 and the like.

Further, since the cross-sectional shape of the connecting cylinder 25 is formed in a streamlined shape that reduces the resistance of the pumped water F flowing in the discharge elbow 6, a smoothing flow of the pumped water F is ensured by exerting a rectifying function. It is possible to reduce the loss in the discharge elbow 6 and suppress the decrease in pump efficiency.

In the above embodiment, the structure is described in which the transparent lid 50 formed of a transparent plate such as acrylic resin is detachably and watertightly fastened to the outer end opening of the connecting tube 25. As shown in FIG. 4, a structure in which transparent lids 50 formed by a transparent plate such as an acrylic resin are detachably and watertightly fastened to both the outer end opening and the inner end opening of the connecting tube 25, or the inner end. Transparent lid 50 only on the opening
May be detachably and watertightly fastened, and the outer end opening may be open to the atmosphere.

[0028]

As described above, since the vertical axis converter built-in vertical shaft pump of the present invention is constructed, the following special effects are obtained.

According to the first aspect of the invention, the influence of pumping water on the inspection window on the direction changer side and the inspection window on the discharge elbow side during operation of the pump can be reliably avoided by the connecting cylinder. Even during the operation of the pump, the inside of the direction changing mechanism chamber can be visually inspected from the outside of the discharge pipe through the connecting cylinder to easily inspect.

According to the second aspect of the present invention, the cross-sectional shape of the connecting cylinder is streamlined to reduce the resistance of the pumped water flowing in the discharge pipe. The flow can be secured, the loss in the discharge pipe can be reduced, and the decrease in pump efficiency can be suppressed to a small level.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of an embodiment of the present invention and corresponds to FIG.

FIG. 2 is a cross-sectional view showing an enlarged main part.

3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is a cross-sectional view corresponding to FIG. 1 showing a modified example of the present invention.

FIG. 5 is an overall view of a conventional example.

FIG. 6 is an enlarged cross-sectional view showing a conventional discharge pipe, a direction changer and the like.

FIG. 7 is a cross-sectional view showing a conventional inspection window.

[Explanation of symbols]

1 bearing 2 spindles 3 impeller 4 Discharge bowl 5 Pumping pipe 6 Discharge elbow (Discharge pipe) 14 Direction changer 20 prime mover 23 Inspection window on the direction changer side 24 Inspection window on the discharge elbow (discharge pipe) side 25 connection tube

Claims (2)

[Claims] 1. A longitudinal main shaft rotatably supported by a bearing, an impeller fixed to the lower part of the main shaft, a discharge bowl accommodating the impeller rotatably, and an upper side of the discharge bowl. And a vertical pumping pipe that penetrates through the main shaft and a discharge pipe that is continuously connected to the upper side of the pumping pipe, and the output rotation of the prime mover is redirected to the discharge pipe. In a vertical axis pump with a built-in direction changer, which has a built-in direction changer that transmits to the main shaft, and an inspection window for visually observing the inside of the direction changer in the direction changer and the discharge pipe is provided in the direction changer side. The vertical axis pump with a built-in direction changer, characterized in that the inspection window and the inspection window on the side of the discharge tube are connected to each other by a watertightly connected connecting tube that is installed between the direction changer and the discharge tube. 2. The vertical shaft pump with a built-in direction changer according to claim 1, wherein a cross-sectional shape of the connection cylinder is formed in a streamlined shape that reduces resistance of pumped water flowing in the discharge pipe.