JPS6329192Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a vertical submersible pump in which a Wesco pump, which is rotationally driven by the submersible motor, is disposed above the submersible motor.

A conventional device of this type will be explained with reference to FIGS. 1 and 2.

In the figure, reference numeral 1 denotes a well casing, which has a large number of through holes 1A that communicate the inside of the well casing 1 with a water vein. 2 is a vertical submersible motor disposed inside the well casing 1; 3 is a Wesco pump disposed above the submersible motor 2 and rotationally driven by the submersible motor 2; and a downward suction port 31 at the bottom.
A is composed of a pump casing 31 having a discharge port 31B in the upper part, and an impeller 32 built in the pump casing 31. Reference numeral 4 denotes a strainer disposed on the lower side of the Wesco pump 3 corresponding to the suction port 31A, and is composed of a disc having a large number of through holes 4A. 5 is a Wesco pump 3 placed at a predetermined interval above the Wesco pump 3.
It is a support member that supports. Note that FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, viewed in the direction of the arrow.

In a device configured in this way, the suction port 3
Because the distance between 1A and the water vein is close, sand is easily sucked into the Wesco Pump 3, which has the disadvantage that the Wesco Pump 3 is prone to malfunction (inability to start due to suction of sand, abnormal wear inside the Wesco Pump 3, etc.). .

This invention was made in order to eliminate the above-mentioned conventional drawbacks, and one embodiment of this invention will be described below with reference to FIGS. 3 and 4.
Reference numeral 50' denotes a support member consisting of a circumferential wall that supports the Wesco pump 3 at a predetermined interval above the vertical underwater mold 2, and a part of it has a water intake port 50A.
is formed. Reference numeral 6 denotes a chamber configured within the support member 50 and communicating the water intake port 50A and the suction port 31A, and the water intake port 6A is disposed at a position approximately half a circumference away from the suction port 31A in the circumferential direction of the impeller 32. It has been established. Other symbols are shown in Figure 1.
The explanation is the same as that of FIG. 2, so the explanation will be omitted.
Further, FIG. 4 is a cross-sectional view taken along the line - in FIG. 3, viewed in the direction of the arrow.

In this structure, when the submersible motor 2 is operated and the Wesco pump 3 is driven, water flows from the through hole 1A → water intake 6A → chamber 6 → through hole 4.
It flows from A to suction port 31A and is discharged from discharge port 31B. In addition, not only is the distance of the suction port 31A from the water vein long, but also the flow velocity of the water flowing into the chamber 6 is reduced, and furthermore, the suction port 31A is arranged upward, so that the amount of water mixed in with the water is reduced. Sand suction port 31A
It can be allowed to settle by its own weight before it reaches .

In this invention, a Wesco pump with a suction port facing downward is placed above a submersible motor, and a circumferential wall is provided between the submersible motor and the Wesco pump. A water intake port is formed in a part of the peripheral wall, and the inside of the peripheral wall forms a chamber communicating with the suction port, and the water intake port is arranged in a circumferential direction of the impeller of the Wesco pump with respect to the suction port. Since they are placed only at positions approximately half a circle apart, they have the effect of suppressing sand suction with an extremely simple configuration. This has the effect of providing a vertical submersible pump that sucks in very little sand.

[Brief explanation of the drawing]

1 and 2 are views showing a conventional vertical submersible pump, in which FIG. 1 is a vertical cross-sectional view, and FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, viewed in the direction of the arrow. 3 and 4 are diagrams showing one embodiment of this invention, with FIG. 3 being a longitudinal sectional view and FIG.
FIG. 3 is a cross-sectional view taken along the - line in the figure, viewed in the direction of the arrow. In the figure, 2 is a submersible motor, 3 is a Wesco pump, 31A is a suction port, 32 is an impeller, 6 is a chamber, 50 is a support member, and 50A is a water intake port. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A Wesco pump with a downward suction port is disposed above the submersible motor, and a circumferential peripheral wall is provided between the submersible motor and the Wesco pump, and a water intake is provided in a part of the peripheral wall. and forming a chamber in which the inside of the peripheral wall communicates with the suction port, and the water intake port is located only at a position approximately half a circumference away from the suction port in the circumferential direction of the impeller of the Wesco pump. A vertical submersible pump characterized by the fact that: