JP2014227673A - Intake device and intake method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake device which is low in equipment cost and capable of pumping-up water with a high water quality without requiring wide installation space, and an intake method.SOLUTION: An intake device is of a submerged pump direct pumping-up type having a submerged pump with a suction opening near a bottom and a lifting pipe connected to the submerged pump, and mud and sand suction prevention means for preventing mud and sand from being sucked from a water bottom during operation of the submerged pump is arranged between the bottom of the submerged pump and the water bottom. The intake device includes the mud and sand suction prevention means which is formed as a closed-end vessel and includes a mud and sand suction prevention plate or a bottom plate arranged approximately parallel to the water bottom, a wall part standing upward from a circumference of the bottom plate, and an opening in the upper part. In an intake method, water is pumped-up by using the intake device.

Description

  The present invention relates to a water intake device and a water intake method for pumping water such as a pond using a submersible pump.

  When pumping water from a pond or the like, a submersible pump direct pumping method is widely used in which a submersible pump is placed directly in a submerged state to pump water. According to this method, water can be pumped at a relatively low cost.

  FIG. 2 is a diagram schematically showing an outline of a water intake device conventionally used in a submersible pump direct pumping system. As shown in FIG. 2, the water intake device includes a submersible pump 11, a pumping pipe 12 connected to the submersible pump 11, a support member 13 that supports the pumping pipe 12, and a pump mount for mounting the submersible pump 11. 14 is provided. A suction port 11 a is provided near the bottom of the submersible pump 11.

  When using this water intake device, the submersible pump 11 is submerged so that the suction port 11a is located below the lowest water level of a water intake place such as a pond. Then, the submersible pump 11 is operated, water is sucked from the suction port 11a, and water is pumped up to the ground through the pumping pipe 12.

  When such a water intake apparatus is used, when the operation is started, the submersible pump 11 sucks up and a water flow may be generated so as to wind up mud sand accumulated on the bottom of the submersible pump 11. In this case, since the rolled up mud sand is sucked into the submersible pump 11 together with water, there is a risk of damaging the submersible pump, piping, equipment arranged in the next stage, and the like. In addition, it is problematic to sprinkle and use low quality water mixed with mud.

  Further, when the submersible pump 11 is continuously operated in such a state, mud sand accumulated on the bottom of the water is continuously drawn around the pump mount 14. As a result, the possibility that mud sand is sucked into the submersible pump 11 increases with time.

  Therefore, normally, several tanks (3 to 4 tanks) of precipitation tanks are provided on the downstream side of the submersible pump 11. By precipitating contaminants such as mud sand in these settling tanks, water having relatively improved water quality can be obtained from the final tank of the settling tank.

  In addition, as a technique for removing contaminants from the pumped water, for example, a technique (for example, Patent Document 1) for extracting treated water from which contaminants have been separated by attaching a solid-liquid separator on the discharge side of the submersible pump, A technique for trapping contaminants in a closed tank provided in water (for example, Patent Document 2) has been developed.

JP 2002-188184 A JP 2007-40117 A

  However, when installing a sedimentation tank, for example, a large amount of money is required and a space for installing the sedimentation tank is required. And it is difficult to use this method in a place where such an installation space cannot be secured. If a new installation space for the sedimentation tank is provided, a larger amount of money is required.

  In addition, when a solid-liquid separator or a closed tank is used, there is a problem that a large amount of money is required and maintenance of these devices is necessary.

  Then, this invention makes it a subject to provide the water intake apparatus and the water intake method which can pump up water with high water quality quality, without installation cost being cheap and requiring a large installation space.

The invention described in claim 1
A submersible pump direct pumping type water intake device comprising a submersible pump having a suction port near the bottom and a pumping pipe connected to the submersible pump,
The water intake device according to claim 1, wherein mud sand suction preventing means for preventing mud sand from being sucked from the water bottom during operation of the submersible pump is disposed between the bottom of the submersible pump and the water bottom.

The invention described in claim 2
2. The water intake device according to claim 1, wherein the mud sand suction preventing means is a mud sand suction preventing plate.

The invention according to claim 3
The mud sand inhalation preventing means is a bottomed container having a bottom plate arranged substantially parallel to the water bottom, a wall portion rising upward from a peripheral edge of the bottom plate, and an opening on the upper side,
The water intake device according to claim 1, wherein the submersible pump is disposed in the bottomed container.

The invention according to claim 4
Using the water intake device according to any one of claims 1 to 3,
A predetermined interval is provided between the bottom of the submersible pump and the mud sand suction preventing means,
The water intake method is characterized in that water is pumped up by the submersible pump.

  According to the present invention, it is possible to provide a water intake device and a water intake method that are low in equipment cost and can pump water with high water quality without requiring a large installation space.

It is a figure which shows roughly the water intake apparatus which concerns on one embodiment of this invention. It is a figure which shows the outline | summary of the conventional water intake apparatus typically.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

[1] First Embodiment First, a water intake device of the present embodiment will be described. FIG. 1 is a diagram schematically showing a water intake device according to the present embodiment, where (a) is a plan view, (b) is a schematic front view seen from the line bb in (a), and (c) is a diagram. It is the side surface schematic seen from the cc line of (a).

  In addition to the conventional submersible pump 1, the pumping pipe 2, and the support member 3 that supports the pumping pipe 2, the water intake device of the present embodiment has an existence as a means for preventing mud sand inhalation between the bottom of the submersible pump 1 and the water bottom. A bottom container 4 is arranged. In FIG. 1, 5 is a chemical anchor, 6 is an angle, and 7 is an anti-vibration rubber.

  The bottomed container 4 includes a bottom plate 4a disposed substantially parallel to the water bottom, and a wall portion 4b that rises upward from the peripheral edge of the bottom plate 4a, and an opening is provided above. The submersible pump 1 is disposed in the bottomed container 4.

  A predetermined gap is secured between the bottom plate of the bottomed container 4 and the suction port 1a of the submersible pump 1 so that no great resistance is generated when the submersible pump 1 sucks water.

  When taking water, the submersible pump 1 is submerged and operated so that the upper end of the bottomed container 4 in which the submersible pump 1 is installed is located below the lowest water level of a water intake place such as a pond. As a result, water is taken into the bottomed container 4 from the opening above the bottomed container 4 and sucked into the submersible pump 1 from the suction port 1 a near the bottom of the submersible pump 1. The water sucked into the submersible pump 1 is then pumped up via the pumping pipe 2.

  At this time, since the bottomed container 4 is disposed between the bottom of the submersible pump 1 and the bottom of the water, mud sand is rolled up from the bottom of the submersible pump 1 even when a water flow occurs at the bottom of the submersible pump 1 during operation of the submersible pump 1. There is nothing.

  As a result, inhalation of mud sand into the submersible pump 1 is effectively prevented, and water is taken into the submersible pump 1 from the opening above the bottomed container 4, so that water of high quality is pumped up and taken in. Can do.

  In addition, as a raw material of the bottomed container 4, stainless steel (SUS) is used preferably. Also, stainless steel (SUS) is preferably used for the support member 3, the chemical anchor 5 and the angle 6 which are other members forming the water intake device.

[2] Second Embodiment In the water intake device according to the present embodiment, a flat mud sand suction prevention plate (so-called baffle plate) is arranged instead of the bottomed container shown in FIG. 1 as mud sand suction prevention means. Except that, it has the same configuration as the water intake device according to the first embodiment.

  That is, by arranging a baffle plate of an appropriate size substantially parallel to the bottom of the water and separating the suction port of the submersible pump from a predetermined gap, the submersible pump is provided in the same manner as in the case of providing the bottomed container described above. Even if a water flow is generated at the bottom of the water, no muddy sand is wound up from the water bottom, and the inhalation of muddy sand into the submersible pump can be effectively prevented. As a result, similar to the first embodiment, water with high water quality can be pumped up and taken.

  As described above, according to the present embodiment, water can be pumped up and taken in by a simple means of arranging a bottomed container or a baffle plate as a mud sand inhalation preventing means. It is not necessary to provide equipment or equipment (solid-liquid separator, sealed tank, sedimentation tank, etc.) for removing contaminants from the water that is sucked in. As a result, the equipment cost can be kept low, and it is not necessary to secure a large installation space.

  While the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments. Various modifications can be made to the above-described embodiment within the same and equivalent scope as the present invention.

  The water intake device (Example) shown in FIG. 1 and the water intake device (Comparative Example) shown in FIG. 2 were installed in the pond and started operation, and the quality of the water pumped up through the pumping pipe was checked. .

  As a result, when using the water intake device of the example, mud and iron content are reduced compared to the case of using the water intake device of the comparative example, and by using the water intake device of the example, water quality is improved. It was confirmed that it was possible to pump up and take in high-priced water.

  Further, when the water intake device of the comparative example was used, brown water was discharged at the start of water intake, but when the water intake device of the example was used, colorless and transparent water was discharged from the start of water intake.

DESCRIPTION OF SYMBOLS 1,11 Submersible pump 1a, 11a Suction port 2,12 Pumping pipe 3,13 Support member 4 Bottomed container 4a Bottom plate 4b Wall part 5 Chemical anchor 6 Angle 7 Anti-vibration rubber 14 Pump mount

Claims (4)

A submersible pump direct pumping type water intake device comprising a submersible pump having a suction port near the bottom and a pumping pipe connected to the submersible pump,
A water intake device, characterized in that mud sand suction preventing means for preventing mud sand from being sucked from the water bottom during operation of the submersible pump is disposed between the bottom of the submersible pump and the water bottom.   The water intake device according to claim 1, wherein the mud sand suction preventing means is a mud sand suction preventing plate. The mud sand inhalation preventing means is a bottomed container having a bottom plate arranged substantially parallel to the water bottom, a wall portion rising upward from a peripheral edge of the bottom plate, and an opening on the upper side,
The water intake device according to claim 1, wherein the submersible pump is disposed in the bottomed container. Using the water intake device according to any one of claims 1 to 3,
A predetermined interval is provided between the bottom of the submersible pump and the mud sand suction preventing means,
A water intake method, wherein water is pumped up by the submersible pump.

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