JP2001165086A - Submergible motor pump for drainage pump car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a submergible motor pump for drainage pump car capable of eliminating the risk of damaging a power cable and also eliminating an interference of the power cable with the other submergible motor pump or a delivery hose even when a plurality of submergible motor pumps are installed. SOLUTION: This motor pump comprises a submergible motor 3 and a pump P driven by the submergible motor 3. The direction of the power cable extraction port 2 of the submergible motor 3 is set in the same direction as that of the delivery direction of the pump. A power cable protective tube 10 is laid down in the area ranging from near the power cable extraction port 2 to a position exceeding a suction port 4, and a power cable 1 is stored in the power cable protective tube 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submersible motor pump for a drainage pump car.

[0002]

2. Description of the Related Art Conventionally, in a region where there is no drainage pumping station equipment, if natural drainage from a tributary to the main river becomes impossible due to a rise in water level of the main river due to heavy rain or the like, the internal water level rises and there is a risk of flooding. A submersible motor pump was carried into the place where the water flow occurred by a drainage pump truck, and the submersible motor pump was suspended and operated by a float floating on the water surface to drain water.

FIG. 3 is a sectional view showing a conventional underwater motor pump of this type. As shown in the figure, the submersible motor pump includes a submersible motor 3 and a pump P driven by the submersible motor 3. Pump P
A pump impeller 7 driven by the submersible motor 3 is housed inside the suction casing 6 and the pump casing 8.

By the way, the power cable 1 from the underwater motor 3
The direction of the power cable outlet 2 for pulling out the water is usually perpendicular to the motor shaft 31 of the submersible motor 3 as in this conventional example (and sometimes in the direction opposite to the pump side of the submersible motor 3).

The submersible motor pump is operated by suspending a pump discharge port 20 connected to a discharge hose (not shown) to a float and submerging it horizontally so as to be horizontal. Since the connecting direction and the pull-out direction of the power cable 1 do not match, the power cable 1 was used loose.

However, as described above, the power cable 1
If the pull-out direction of the power cable does not match the connecting direction of the discharge hose, the power cable 1 may be bent at a sharp angle at a position exiting the power cable pull-out port 2, and the power cable 1 may be damaged. Was. When a plurality of submersible motor pumps are used at the same time, the power cable 1 interferes with other submersible motor pumps or discharge hoses to apply excessive force to the power cable 1, or the drainage work is completed and the submersible motor pump is completed. When the power cable 1 is lifted from a river, the power cable 1 may be entangled with another underwater motor pump and damage the power cable 1.

[0007] As shown in FIG. 3, the power cable 1 that has exited the power cable outlet 2 passes near the suction port 4 opened on the outer periphery of the suction casing 6. There is also a problem that the cable 1 is pulled in the suction flow direction.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to prevent the power cable from being damaged and to provide a power cable even when a plurality of submersible motor pumps are installed. It is an object of the present invention to provide a submersible motor pump for a drain pump car that does not interfere with other submersible motor pumps and discharge hoses.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a submersible motor and a pump driven by the submersible motor, is loaded on a drainage pump truck, and put into water at a place where drainage is required. In a submersible motor pump for a drainage pump vehicle that drains water from a discharge port of a pump, a direction of a power cable outlet of the submersible motor is set to be the same as a pump discharge direction.

Further, the present invention is characterized in that a power cable protection tube is provided from the vicinity of the power cable outlet to a position beyond the suction port of the pump, and the power cable is accommodated in the power cable protection tube.

The submersible motor pump has a structure in which water is sucked from a suction port opened on an outer periphery of a suction casing provided between the submersible motor and the pump casing, and a part of a suction flow passage of the suction casing is provided. A wall is provided, a power cable is passed through the wall, and a power cable is drawn out from a power cable outlet provided in the suction casing or the pump casing.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view showing a submersible motor pump according to the first embodiment of the present invention. As shown in the figure, the submersible motor pump includes a submersible motor 3 and a pump P driven by the submersible motor 3. The pump P is configured such that a pump impeller 7 driven by the electric motor shaft 31 of the submersible motor 3 is housed inside the suction casing 6 and the pump casing 8. 4 is a suction port, 5 is a rib, and 9 is a guide vane.

On the other hand, the power cable outlet 2 for drawing the power cable 1 to the outside is oriented in the same direction as the motor shaft 31, that is, in the same direction as the pump discharge direction. The direction of the cable 1 is the same as the pump discharge direction.

In this submersible motor pump, a power cable protection tube 10 is provided from a position near the power cable outlet 2 to a position beyond the suction port 4 of the pump P (to a position closer to the discharge port 20 than the suction port 4). Then, the power cable 1 drawn from the power cable outlet 2 is passed through the power cable protection tube 2. The power cable protection tube 10 is fixed to a side surface of the submersible motor pump by protection tube fixing brackets 11, 11.

The submersible motor pump drives a submersible motor 3 by suspending a pump discharge port 20 connected to a discharge hose (not shown) to a float and submerging it horizontally. As a result, the pump impeller 7 rotates, and water is sucked in from the suction port 4 and discharged and drained from the pump discharge port 20 to a discharge hose.

In the above-described submersible motor pump, since the direction of the power cable outlet 2 is set to the same direction as the pump discharge direction, the power cable 1 does not bend at a sharp angle or has a large slack. There is no risk of being damaged. Also, even when a plurality of submersible motor pumps are used at the same time, the power cable 1 does not interfere with other submersible motor pumps or discharge hoses, and does not exert an excessive force on the power cable 1. Power cable 1 when lifting the motor pump from the river
However, there is no danger of damaging the power cable 1 without getting entangled in another submersible motor pump.

Even if a suction flow occurs in the suction port 4 due to the drive of the submersible motor pump, the power cable 1 is housed in the power cable protection tube 10, so that the power cable 1 is not pulled in the suction flow direction. Therefore, no excessive force is applied to the power cable 1.

FIG. 2 is a view showing a submersible motor pump according to a second embodiment of the present invention. FIG. 2 (a) is a sectional view, and FIG. 2 (b) is a sectional view taken on line AA of FIG. 2 (a). It is. In this submersible motor pump, the same parts as those of the submersible motor pump shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In this submersible motor pump, a thick wall 12 is provided in a suction flow path from a suction port 4 opened on the outer periphery of a suction casing 6 provided between a submersible motor 3 and a pump casing 8. A hole 13 is provided inside this hole 1
The power cable 1 is drawn through a power outlet 2 provided in the suction casing 6.

Even with this configuration, the direction of the power cable outlet 2 can be the same as the direction of the motor shaft 31, that is, the same direction as the pump discharge direction, so that the direction of the power cable 1 pulled out from the submersible motor 3 remains unchanged. The direction is the same as the pump discharge direction, so that the same effect as the embodiment of FIG. 1 is produced. That is, the power cable 1 does not bend at a sharp angle or has a large slack, so that the power cable 1 is not likely to be damaged. In addition, even when a plurality of submersible motor pumps are used at the same time, the power cable 1 does not interfere with other submersible motor pumps or discharge hoses, and no excessive force is applied to the power cable 1. Even when the motor pump is lifted from the river, the power cable 1 does not get entangled with another submersible motor pump, and there is no risk of damaging the power cable 1.

Even if the suction flow is generated in the suction port 4 by the driving of the submersible motor pump, the power cable 1 is connected to the suction port 4.
Since the power cable 1 passes through the wall 12 provided in the suction flow path, the power cable 1 is not pulled in the suction flow direction, and no excessive force is applied to the power cable 1 from this point.

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 are possible within the scope of the claims and the technical idea described in the specification and the drawings. Is possible. It should be noted that any shape or material not directly described in the specification and the drawings is within the scope of the technical idea of the present invention as long as the effects and effects of the present invention are exhibited.

For example, in the underwater motor pump shown in FIG.
Although the power cable outlet 2 is provided in the suction casing 6, it may be provided in the pump casing 8 instead.

[0024]

As described in detail above, according to the present invention, the power cable of the submersible motor pump hardly interferes with other submersible motor pumps and discharge hoses at the emergency drain pump installation site, There is no problem of damage to the power cable at the time of installation, operation, and pulling up. Therefore, there is an excellent effect that the installation, operation, and pulling up of a plurality of submersible motor pumps for drainage can be smoothly performed in an emergency. .

In particular, if the power cable is passed through the power cable protection tube or a wall provided in a part of the suction passage, there is no possibility of further damage to the power cable.

[Brief description of the drawings]

FIG. 1 is a sectional view of a submersible motor pump.

FIG. 2 is a view showing another underwater motor pump, and FIG.
2A is a cross-sectional view, and FIG. 2B is a cross-sectional view along the line AA in FIG.

FIG. 3 is a sectional view of a conventional submersible motor pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power cable 2 Power cable outlet 3 Submersible motor P pump 4 Suction port 5 Rib 6 Suction casing 7 Pump impeller 8 Pump casing 9 Guide vane 10 Power cable protection tube 11 Protection tube fixing bracket 12 Wall 13 Hole 14 Single line of power cable 20 outlet

Claims (3)

[Claims] 1. A submersible motor for a drainage pump truck, comprising a submersible motor and a pump driven by the submersible motor, loaded on a drainage pump truck, put into the water at a required drainage point, and drained from a discharge port of the pump. In the pump, the direction of the power cable outlet of the submersible motor is set to the same direction as the pump discharge direction. 2. The drainage pump according to claim 1, wherein a power cable protection tube is provided from a position near the power cable outlet to a position beyond a suction port of the pump, and the power cable is housed in the power cable protection tube. Submersible motor pump for cars. 3. The submersible motor pump has a structure in which water is sucked from a suction port opened on an outer periphery of a suction casing provided between a submersible motor and a pump casing, and a part of a suction flow path of the suction casing. 2. A submersible motor for a drainage pump car according to claim 1, wherein a power cable is passed through the wall, and a power cable is drawn out from a power cable outlet provided in the suction casing or the pump casing. pump.