JP2002188591A - Drainage pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage pump for emergency allowing a person to carry it simply. SOLUTION: This drainage pump 1 consists of a pump part 1a sucking the water 3 collected in underground facility 2 and feeding it into a discharge pipe 4 and a hydraulic motor 1b driving the pump part 1a. An oil pressure generation unit 6 supplying pressure oil which is working fluid to the hydraulic motor 1b is put on the ground by separating it from the pump 1 to allow the person to carry the pump 1 simply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency drain pump for discharging water accumulated in an underground facility.

[0002]

2. Description of the Related Art In recent years, there are many cases in which underground facilities such as underground malls and basements of buildings are damaged by flooding due to heavy rain in urban areas. It is important to drain the accumulated water to the ground as soon as possible in order not to increase the inundation damage of the underground facilities. In such emergency drainage work,
Onshore pumps may not have enough capacity to pump water from underground facilities to the ground,
Submersible motor pumps that operate submerged in water are often used as drainage pumps.

FIG. 5 shows an example of such a drain pump. The pump 51 is driven by an electric motor 54 on a rotating shaft 53 having an impeller 52 mounted at a tip end thereof.
With the rotation of, the water sucked from the suction port 55 is lifted to the ground through the discharge pipe 56 and discharged.
The electric motor 54 is supplied with electricity from a ground power supply (not shown) via a cable 57.

[0004]

The conventional drain pump described above has a built-in electric motor having a considerable size and weight, so that the entire pump has a weight of about several hundred kg and is not easily carried by a person. Is very difficult to transport. Particularly, in the drainage work of an underground facility requiring urgency, if the transport of the pump takes a long time, the start of drainage may be delayed and the damage caused by flooding may increase.

An object of the present invention is to provide an emergency drainage pump that can be easily carried by a person.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention uses a drive shaft which is submerged in water collected in an underground facility and has an impeller mounted at a tip end thereof. A drain pump that lifts and sucks water sucked from the suction port to the ground by the rotation of the impeller, and drives the drive motor by a pressure supplied from a hydraulic source placed on the ground via an oil pipe. The structure adopted was a hydraulic motor using oil as a working fluid.

That is, the drive motor is a hydraulic motor using hydraulic oil supplied from a hydraulic source via an oil pipe as a working fluid, and the hydraulic source, which is a heavy driving force generating unit, is separated from the pump and placed on the ground. As a result, the weight of the pump has been reduced to a level that can be carried by humans.

The rotary shaft is divided into a drive shaft driven by the hydraulic motor and a driven shaft on which the impeller is mounted, and these drive shafts and the driven shaft are detachably connected to each other. The hydraulic motor can be removed from the pump and transported separately.

[0009] An adapter connected to an existing pipe provided for drainage, such as a discharge pipe of another drainage pump, can be attached to the suction port, so that the adapter can be used as a relay pump in case of remote drainage. can do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which the drainage pump 1 according to the first embodiment is used by being immersed in water 3 accumulated in an underground facility 2. The drainage pump 1 includes a pump unit 1a and a hydraulic motor 1b connected to the pump unit 1a. A discharge pipe 4 extending to the ground is connected to the pump unit 1a, and the hydraulic motor 1b is connected via an oil pipe 5. It is connected to a hydraulic pressure generating unit 6 mounted on a ground track. When pressure oil is supplied from the hydraulic pressure generating unit 6 to the hydraulic motor 1b via the oil pipe 5, the hydraulic motor 1b operates to drive the pump unit 1a, and the pump unit 1a sucks the water 3 and sends it to the discharge pipe 4. The water 3 sent to the discharge pipe 4 is discharged on the ground.

As shown in FIG. 2, the pump section 1a of the drainage pump 1 has an impeller 8 attached to the tip of a rotating shaft 7 attached to a hydraulic motor 1b, and a strainer 9 attached to a lower suction port. Have been. Rotary shaft 7 is hydraulic motor 1
b, the rotation of the impeller 8 causes the strainer 9 to rotate.
The water sucked through the hole 9a is sent to the discharge pipe 4 connected to the pump section 1a. In addition,
While the conventional pump has a complicated liquid-tight structure because of incorporating an electric motor, this drainage pump 1 has a hydraulic motor 1b itself having a liquid-tight structure, and therefore the pump section 1a
The structure is very simple.

The rotary shaft 7 is divided into a drive shaft 7a driven by a hydraulic motor and a driven shaft 7b on which an impeller 8 is mounted. The drive shaft 7a and the driven shaft 7b are detachable by spline connection. It is connected to. Since the pump unit 1a and the hydraulic motor 1b are connected only by the rotating shaft 7, by removing the driving shaft 7a from the driven shaft 7b,
Can be easily disassembled.

FIG. 3 shows a comparison between the size of the pump 1 of the present invention and the above-mentioned conventional pump 51 on the same scale. Although the pumps 1 and 51 have the same capacity, the present invention employs a hydraulic motor 1b in place of the electric motor 54, so that the conventional pump 51 is generally used.
Much smaller than. Also, the hydraulic motor 1b
Is about 1/15 of the electric motor 54 in weight. As a result, the weight of the entire pump is 35 k which is about 1/10 of the conventional weight.
g or less, so that people can carry it.

FIG. 4 shows a second embodiment. This drain pump is provided with an adapter 10 which is connected to a discharge pipe (not shown) of another pump by screw connection at a suction port. Even in the case of drainage at a remote location where the suction position and the discharge position are far apart, the drainage can be efficiently performed by connecting the pumps in series on the way. Other configurations are the same as those of the drain pump of the first embodiment.

In the above-described embodiment, the pump is submerged in water. However, it is also possible to submerge only the suction port in water and use it on land within the range of the suction capacity. in this case,
In the conventional pump, cooling of the electric motor is necessary, but it is not necessary because a hydraulic motor is used.

Although the connection between the drive shaft and the driven shaft is made by spline connection, power can be transmitted by key connection or the like.
Any method may be employed as long as it is easy to attach and detach.

Further, the connection between the adapter in the second embodiment and the discharge pipe of another pump is not limited to the screw connection.
Any connection method that can withstand the water supply pressure may be used.

[0018]

As described above, in the drain pump of the present invention, the drive motor is a hydraulic motor operated by hydraulic oil supplied from the hydraulic source, and the heavy hydraulic source is separated from the pump and placed on the ground. As a result, the weight is significantly reduced as compared with the related art, so that a person can easily carry it.

The rotary shaft is divided into a drive shaft driven by a hydraulic motor and a driven shaft on which an impeller is mounted, and these drive shafts and the driven shaft are detachably connected to each other so that the hydraulic pressure can be reduced from the pump. Since the motor can be easily removed, transportation is further facilitated.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a use state of a drainage pump according to a first embodiment.

FIG. 2 is a longitudinal sectional view of the drain pump of FIG. 1;

FIG. 3 is a longitudinal sectional view comparing the size of the drainage pump of FIG. 1 with that of a conventional pump.

FIG. 4 is a longitudinal sectional view of a drainage pump according to a second embodiment.

FIG. 5 is a longitudinal sectional view of a conventional pump.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drainage pump 1a Pump part 1b Hydraulic motor 2 Underground facility 3 Water 4 Discharge pipe 5 Oil pipe 6 Hydraulic pressure generating unit 7 Rotary shaft 7a Drive shaft 7b Followed shaft 8 Impeller 9 Strainer 9a Hole 10 Adapter

Claims (3)

[Claims] 1. A rotary shaft having an impeller mounted at a tip end thereof is driven by a drive motor, and is used by being immersed in water accumulated in an underground facility, and is rotated from the suction port by the rotation of the impeller. In a drain pump for lifting and discharging the sucked water to the ground, the drive motor is a hydraulic motor using a hydraulic fluid supplied from a hydraulic source placed on the ground via an oil pipe as a working fluid. pump. 2. The method according to claim 1, wherein the rotating shaft is divided into a driving shaft driven by the hydraulic motor and a driven shaft on which the impeller is mounted, and the driving shaft and the driven shaft are detachably connected. Item 4. The drainage pump according to Item 1. 3. The suction port can be provided with an adapter connected to an existing pipe.
The drainage pump according to 1.