JP2553230Y2 - Vertical pump - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical pump for pumping water from an underground channel formed deep underground.

[0002]

2. Description of the Related Art In recent years, the forest area has been reduced due to the development of mountainous areas and the like, and the water retention capacity of trees has been reduced. It tends to increase sharply after rainfall. On the other hand, it is almost impossible to increase the width of a river flowing through an urban area, because it is difficult to secure a construction site.

For this reason, it is conceivable to construct a river bypass channel at a large depth, to divert the river water underground, and to later pump the river water downstream.

[0004]

[Problems to be solved by the invention] However, in order to pump river water from a large depth, a large pump such as a vertical shaft pump is required, and a large-diameter pump pipe is required. There is a problem that it is difficult to cast a large-diameter pipe having a characteristic, and the cost increases.

An object of the present invention is to provide a vertical pump having a low-cost, high-head, large-capacity pumping channel at low cost.

[0006]

Means for Solving the Problems To solve the above problems, the vertical shaft pump of the present invention has a cylindrical pumping passage extending from a deep underground to the ground, which is constructed integrally with the pump pit from concrete, and pumps the water. At the lower end of the channel, a suction port communicating with the headrace formed at the bottom of the pump pit is provided, a discharge port is provided at the upper end of the pumping channel, a pump shaft is vertically installed inside the pumping channel, and a motor is provided at the upper end of the pump shaft. And an impeller provided at the lower end of the pump shaft so as to face the suction port.

[0007]

According to the above construction, the impeller is rotated via the pump shaft by the driving of the motor, the water is pumped from the water guide channel into the water pump channel through the suction port, and discharged from the discharge port of the water pump channel to the outside. And since the pumping pit is formed integrally with the pump pit, it can be constructed simultaneously with the pump pit when constructing the pump pit, compared with a case where the pumping pit is formed by a structure such as a metal pipe separate from the pump pit. And the structure can be simplified.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 and 2, a pump pit 1 is formed in a cylindrical shape from a deep underground to the ground, and a water conduit 2 communicating with a groundwater channel is formed at the bottom of the pump pit 1.

A plurality of cylindrical pumping passages 3 are formed vertically inside the pump pit 1 along the axial direction of the pump pit 1, and the pump pit 1 and the pumping passage 3 are integrally made of concrete. Has been built. The pumping channel 3 communicates with the headrace channel 2 through a suction port 4 formed at the lower end.
A discharge port 5 is provided at the upper end of the pumping channel 3.

A motor 6 is provided at the upper end of the water pumping passage 3, and a pump shaft 7 is vertically connected to the motor 6 at one end thereof. The pump shaft 7 is rotatably supported by bearings 8 provided at a plurality of locations along the pumping passage 3, and an impeller 9 is provided at a lower end of the pump shaft 7.
Further, a guide vane 10 is provided around the impeller 9. In the middle of the pumping channel 3, a plurality of inspection ports 11 are provided.
Is formed in each inspection opening 11 so that the door body 1 can be opened and closed.
2 are provided.

In the above structure, the river water 13 of the river flows into the headrace 2 of the pump pit 1 through the underground waterway. At the time of pumping, the pump 6 is driven by the motor 6.
The impeller 9 is rotated through the shaft, and the rotation of the impeller 9 causes the river water 13 in the water conduit 2 to be sucked into the water pumping channel 3 through the suction port 4, to be pumped to the ground side through the water pumping channel 3, and to be discharged from the discharge port 5 to the outside. Discharge.

Since the pumping pit 3 is formed integrally with the pump pit 1, the pumping pit 1 can be constructed of concrete simultaneously with the pump pit 1 when the pump pit 1 is constructed. As compared with the case of forming by a structure such as a tube, a flow path having a large capacity and a high head can be easily constructed at low cost. In addition, the structure is simplified.

[0013]

[Effects of the Invention] As described above, according to the present invention, the pumping channel is constructed of concrete integrally with the pump pit, so that a vertical shaft having a pumping channel with a low cost, a high head, a large capacity, and a simple structure is provided. A pump can be configured.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vertical pump according to an embodiment of the present invention.

FIG. 2 is a plan view of the vertical pump according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump pit 2 Headrace 3 Pumping path 4 Suction port 5 Discharge port 6 Motor 7 Pump shaft 9 Impeller

Claims (1)

(57) [Scope of request for utility model registration] 1. A pumping pit extending from a deep underground to the ground is constructed of concrete integrally with a pump pit, and a suction port at the lower end of the pumping pit communicating with a headrace formed at the bottom of the pump pit is provided. A discharge port is provided at the upper end side of the pumping channel, a pump shaft is vertically provided inside the pumping channel, a motor is connected to the upper end of the pump shaft, and an impeller is provided at the lower end of the pump shaft facing the suction port. A vertical shaft pump characterized by being provided.