JPH0561494U - underwater pump - Google Patents

Abstract

(57) [Summary] [Purpose] With the outer casing attached to the outer circumference of the submersible pump,
Even if sediment is deposited inside, the submersible pump can be easily taken out. [Constitution] A submersible pump 1 is erected on a bottom portion T of a column K standing on a water intake portion U.
A pump casing 7 in which a suction casing 5 and a guide casing 6 are vertically connected is provided on the outer circumference of an impeller 4 of the pump 3 which is directly connected to the pump casing 7. It is characterized in that an open funnel-shaped casing 11 is attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a submersible pump that is used for irrigation equipment that uses water such as rivers and that can be pulled up even after long-term operation and sediment has accumulated.

[0002]

[Prior Art]

 In a paddy field close to a river or the like, conventionally, a column K as shown in FIG. 2 is erected on a river bed which is an intake U of the river, and a motor 2 and a pump 3 are provided at a bottom T in the column K. The submersible pump 1 is installed, and this pump 3 is composed of an impeller 4 directly connected to the motor 2 and a pump casing 7 in which a suction casing 5 and a guide casing 6 are vertically connected to surround the impeller 4. Has been done.

The river water S is fed into the column K from the suction port 5 a of the suction casing 5 through the drain port 6 a of the guide casing 6 by the rotation of the impeller 4 driven by the motor 2 of the submersible pump 1.

After the water level rises, the river water S inside the column K is supplied to a water receiving groove M such as a paddy field through a discharge pipe H communicating with the upper end of the column K. In addition, the submersible pump 1 is connected with a lifting member such as a rope or a chain to the eyebolt 8 provided at the upper end of the submersible pump 1 to perform a periodic inspection once a year or disassembly repair once every three or four years. The lifting work was done to do the work.

[0005]

[Problems to be solved by the device]

 However, in the conventional submersible pump 1, the outer shape connecting the suction casing 5 of the pump 3 and the guide casing 6 is thick at the upper and lower end portions and thin at the middle portion. A space S having a substantially arcuate cross section is formed between the peripheral wall and the peripheral wall.

[0006] Therefore, when the river water W contains sediments D having various particle sizes, the sediments D enter the inside of the gap S and are used for the vibration operation of the submersible pump 1 and the guide casing. The river water W generated in the vicinity of the drainage port 6a of No. 6 accumulates while receiving the swirling action, and its consolidation proceeds.

This is because the sediment D accumulated in the gap S acts as a wedge for fixing the submersible pump 1 to the bottom portion T of the column K, so that the pulling operation of the submersible pump 1 becomes extremely difficult. There was an inconvenience.

By the way, a prior art example of a submersible pump is disclosed, for example, in Japanese Utility Model Publication No. 1-10480, but this prior art aims to improve a cable suspension guide for a submersible pump. However, it was not designed to easily pull up the submersible pump even if sediment is deposited between the submersible pump and the inner wall of the column.

In view of such conventional circumstances, the present invention provides a submersible pump which has a simple structure and which can be easily pulled up even after the earth and sand have accumulated inside the gap S. Has a purpose.

[0010]

[Means for Solving the Problems]

 The submersible pump of the present invention has a submersible pump installed at the bottom of a column standing upright at the intake part.This submersible pump has a suction casing and a guide casing arranged vertically on the outer circumference of the impeller of the pump directly connected to the motor. A pump casing connected to the pump casing is provided, and a funnel-shaped casing body that expands upward is attached to the outer periphery of the pump casing.

[0011]

[Action]

 After operating the submersible pump for a long period of time, when pulling up the submersible pump with a rope etc. for periodic inspection and disassembly and repair of the submersible pump, earth and sand accumulate between the submersible pump and the inner wall of the column. Even so, since the submersible pump is covered by the funnel-shaped casing that expands upward, the submersible pump can be easily taken out from the bottom of the column.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

Since the basic structure in which the submersible pump is installed in the column has already been described with reference to FIG. 2, the same reference numerals are used for the same portions, and the description thereof will be omitted.

That is, the outer casing 11 as shown in FIG. 1 is detachably attached to the outer periphery of the pump casing 7 by, for example, four upper mounting screws 12 and four lower mounting screws 13.

The outer casing 11 is provided to easily detach the submersible pump 1 installed at the bottom portion T in the column K. That is, sediment is prevented from accumulating between the submersible pump 1 and the column K. The outer cover 11 is made of a synthetic resin material, a steel plate, or the like, and is formed in a funnel shape that expands upward. A spacer 14 is arranged between the upper part of the outer casing 11 and the upper part of the guide casing 6, and is fixed to the guide casing 6 together with the outer casing 11 by an upper mounting screw 12.

Reference numeral 20 in the drawing is a cable.

Next, the operation of the above embodiment will be described.

After the submersible pump 1 is operated for a long period of time, when the submersible pump 1 is pulled up by connecting a pulling member such as a rope to the eyebolt 8 in order to perform a regular inspection of the submersible pump 1, Since it is covered by the body 11, the submersible pump 1 can be easily taken out from the bottom of the column K without any resistance. Since the outer cover 11 has a shape that expands upward, even if earth and sand are caught between the outer cover 11 and the column K, it can be easily taken out upward.

[0019]

[Effect of the device]

 Since the submersible pump of the present invention has a funnel-shaped casing that expands upward, the submersible pump and the column are mounted on the further outer periphery of the pump casing that forms the outer peripheral shape of the submersible pump. Even if earth and sand accumulate between the inner wall and the inner wall of the column, the submersible pump can be easily taken out from the inside of the column because the outer casing is formed to expand upward.

Therefore, there is an excellent advantage that the workability for periodical inspection and overhaul of the submersible pump is significantly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a main part of a submersible pump.

FIG. 2 is a vertical cross-sectional view illustrating a conventional example of a submersible pump.

[Explanation of symbols]

 1 Submersible Pump 2 Motor 3 Pump 4 Impeller 5 Suction Casing 6 Guide Casing 7 Pump Casing 11 Outer Body D Sediment K Column U Intake Part

Claims (1)

[Scope of utility model registration request] 1. A submersible pump is installed at the bottom of a column standing upright at the water intake, and this submersible pump is constructed by vertically connecting a suction casing and a guide casing to the outer circumference of an impeller of a pump directly connected to a motor. The submersible pump according to claim 1, wherein the pump casing is provided with a funnel-shaped jacket body that expands upward.