JP4074184B2 - Horizontal shaft pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a horizontal shaft pump.
[0002]
[Prior art]
FIG. 3 is an overall schematic configuration diagram showing a conventional horizontal axis pump (tubular pump) 80. As shown in the figure, the horizontal shaft pump 80 includes a pump shaft 83, an impeller 85 fixed to one end of the pump shaft 83, and a drive unit 87 connected to the other end of the pump shaft 83. It is configured to store. In addition, 91 is a guide vane and 93 is a flap valve. When the driving machine 87 is driven, the impeller 85 rotates, and water sucked from the pump suction port 95 is discharged from the pump discharge port 97.
[0003]
FIG. 4 is an overall schematic configuration diagram showing a conventional horizontal axis pump gate 100. As shown in the figure, the horizontal axis pump gate 100 is configured by incorporating a horizontal axis pump 130 for drainage into a gate 120 that opens and closes a water channel. A horizontal shaft pump 130 includes a pump shaft 103, an impeller 105 fixed to one end of the pump shaft 103, and a drive unit (submersible motor) connected to the other end of the pump shaft 103 in a casing 101 installed substantially horizontally. ) 107 is housed. When the drive unit 107 is driven, the impeller 105 rotates, and water sucked from the pump suction port 115 is discharged from the pump discharge port 117 and drained.
[0004]
However, the horizontal pumps 80 and 100 have the following problems.
{Circle around (1)} Since the drive unit composed of the drive units 87, 107 and the like is installed in the pump casings 81, 101, the outer dimensions (both outer diameter and length) of the entire pump are increased.
[0005]
{Circle around (2)} Since the drive unit including the drive units 87 and 107 is installed in the pump, maintenance of the drive unit becomes difficult.
[0006]
(3) Since the pump suction ports 95 and 115 and the pump discharge ports 97 and 117 are on the same straight line, the positions of the pump suction ports 95 and 115 are high, and the pump operable water level cannot be lowered.
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described points, and an object of the present invention is to provide a horizontal shaft pump that can reduce the size of the pump, can easily perform maintenance of the driving machine, and can keep the pump operable water level low. There is.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the invention according to claim 1 of the present application is such that the central axis of the pump suction port is parallel to the central axis of the pump discharge port, and the central axis of the pump suction port is more than the central axis of the pump discharge port. The water channel in the pump is eccentric in the middle so that it is located on the lower side, the impeller is housed in the water channel on the pump discharge port side, and the drive unit is installed in the upper space of the water channel on the pump suction port side generated by the eccentricity The horizontal shaft pump is characterized in that the drive unit and the impeller are connected by a horizontally installed pump shaft. Since the drive unit is installed in the upper space (external) of the water channel on the pump suction port side as described above, it is not necessary to store the drive unit such as the drive unit in the water channel, and the entire pump including the drive unit can be downsized. In addition, the maintenance of the drive can be easily performed. Moreover, since the pump suction port is located at a position lower than the pump discharge port, the pump operable water level is lowered.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall schematic configuration diagram showing a horizontal shaft pump 10 according to an embodiment of the present invention. As shown in the figure, the horizontal axis pump 10 is, for example, a pump installed in a drainage facility, and the water channel in the pump formed by the casing 11 is decentered (bent portion 35) in the middle thereof, whereby the pump suction port The central axis of 31 is horizontal with the central axis of the pump discharge port 33, the central axis of the pump suction port 31 is positioned below the central axis of the pump discharge port 33, and the water channel on the pump discharge port 33 side. The impeller 15 and the guide vane 17 are installed inside, the pump shaft 13 having one end fixed to the impeller 15 is horizontally pulled out from the bent portion 35 of the casing 11 to the outside of the pump, and the drive unit 19 is connected to the end portion. Configured. A water channel formed by the casing 11 connects the suction water tank 40 and the discharge water tank 45. The pump discharge port 33 is provided with a discharge valve, a flap valve 21 and the like.
[0010]
In other words, in the case of this horizontal shaft pump 10, the casing 11 is bent halfway to decenter the water channel in the pump, and the drive unit 19 is installed in the upper space of the water channel on the pump suction port 31 side generated by the eccentricity. ing. As the driving machine 19, various driving machines such as a motor and an engine can be used.
[0011]
When the driving device 19 is driven, the impeller 15 rotates, whereby water on the suction water tank 40 side is sucked from the pump suction port 31 and discharged from the pump discharge port 33 into the discharge water tank 45.
[0012]
In this horizontal axis pump 10, since the drive unit 19 is installed in the upper space of the water channel on the pump suction port 31 side generated by the eccentricity, there is no need to store the drive unit such as the drive unit 19 in the water channel. Therefore, the outer diameter of the casing 11 can be reduced, and the outer diameter of the entire pump including the drive unit 19 can be reduced. At the same time, the pump suction port 31 can be installed substantially below the drive unit 19, so that the entire pump The size of the length can be reduced. Moreover, since the drive machine 19 is installed in the upper part (namely, the exterior) of the casing 11, the maintenance can be performed easily. In addition, since the pump suction port 31 is located at a position lower than the pump discharge port 33, the pump operable water level of the suction water tank 40 can be lowered.
[0013]
FIG. 2 is an overall schematic configuration diagram showing a horizontal axis pump gate 70 using a horizontal axis pump 50 according to another embodiment of the present invention. As shown in the figure, the horizontal axis pump gate 70 is constructed by incorporating a horizontal axis pump 50 for drainage into a gate 71 that opens and closes a water channel by moving up and down. The horizontal axis pump 50 decenters (bends 67) the water channel in the pump formed by the casing 51, so that the central axis of the pump suction port 61 is horizontal with the central axis of the pump discharge port 63, and The central axis of the pump suction port 61 is positioned below the central axis of the pump discharge port 63, and an impeller 55 and a guide vane 57 are installed in the water channel on the pump discharge port 63 side. The pump shaft 53 to which is fixed is pulled out horizontally from the bent portion 67 of the casing 51 to the outside of the pump, and a driving machine (submersible motor) 59 is connected to the end thereof. A flap valve 65 is installed at the pump discharge port 63.
[0014]
In other words, in the case of this horizontal shaft pump 50, the casing 51 is bent halfway to decenter the water passage in the pump, and the drive unit 59 is installed in the upper space of the water passage on the pump suction port 61 side generated by the eccentricity. ing.
[0015]
When the water channel is closed by the gate 71 and the drive unit 59 is driven, the impeller 55 rotates, whereby water sucked from the pump suction port 61 is discharged and drained from the pump discharge port 63.
[0016]
Also in this horizontal axis pump 50, since the drive unit 59 is installed in the upper space of the water channel on the pump suction port 61 side generated by the eccentricity, there is no need to store the drive unit such as the drive unit 59 in the pump water channel. For this reason, the outer diameter of the casing 51 can be reduced, the outer diameter of the entire pump including the drive unit 59 can be reduced, and at the same time, the pump suction port 61 can be installed substantially below the drive unit 59. The overall length of the pump can be reduced. Further, since the drive unit 59 is installed on the upper portion (that is, outside) of the casing 51, the maintenance can be easily performed. In addition, since the pump suction port 61 is located at a position lower than the pump discharge port 63, the pump operable water level can be lowered.
[0017]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims and the technical idea described in the specification and drawings. Deformation is possible. For example, although the case where the present invention is used as a pump for a drainage facility or a pump gate is shown in the above embodiment, it is needless to say that the present invention can be applied to a horizontal axis pump used for various other purposes.
[0018]
【The invention's effect】
As described in detail above, the present invention has the following excellent effects.
(1) The drive is installed in the upper space of the water channel on the pump suction port side, which is caused by decentering the water channel in the pump and decentering, so it is necessary to store the drive unit such as the drive in the water channel. Therefore, the entire pump including the drive unit can be reduced in size.
[0019]
(2) Since the drive unit is installed above the water channel in the pump (that is, outside), the maintenance can be easily performed.
[0020]
(3) Since the pump suction port is located at a position lower than the pump discharge port, the pump operable water level can be lowered.
[Brief description of the drawings]
FIG. 1 is an overall schematic configuration diagram showing a horizontal axis pump 10 according to an embodiment of the present invention.
FIG. 2 is an overall schematic configuration diagram showing a horizontal axis pump gate 70 using a horizontal axis pump 50 according to another embodiment of the present invention.
3 is an overall schematic configuration diagram showing a conventional horizontal axis pump (tubular pump) 80. FIG.
4 is an overall schematic configuration diagram showing a conventional horizontal axis pump gate 100. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Horizontal shaft pump 11 Casing 15 Impeller 17 Guide vane 19 Driver 21 Flap valve 31 Pump suction port 33 Pump discharge port 40 Suction water tank 45 Discharge water tank 50 Horizontal shaft pump 51 Casing 53 Pump shaft 55 Impeller 57 Guide vane 59 Drive machine (underwater motor)
61 Pump suction port 63 Pump discharge port 65 Flap valve 70 Horizontal axis pump gate 71 Gate

Claims (1)

The water channel in the pump is decentered in the middle so that the center axis of the pump suction port is parallel to the center axis of the pump discharge port and the center axis of the pump suction port is located below the center axis of the pump discharge port. The impeller is housed in the water channel on the pump discharge port side, and a drive unit is installed in the upper space of the water channel on the pump suction port side caused by the eccentricity, and the pump shaft is installed horizontally between the drive unit and the impeller. A horizontal axis pump characterized by being connected.

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