JP4920484B2 - Drainage pump equipment - Google Patents

Description

  The present invention is a drainage pump device that is installed in a water tank such as a sewage drainage tank and efficiently discharges foreign matter staying or depositing on the bottom of the water tank to prevent malodor caused by foreign matter staying or depositing on the bottom of the water tank. About.

  Conventionally, for example, in a drainage pump device placed in a sewage drainage tank such as a manhole placed at an appropriate place in a sewage flow pipe system that connects a sewage generation source and a sewage treatment plant, a foreign matter that causes odors at the bottom of the water tank It is required to drain the sewage in the water tank without retaining or accumulating water. For this reason, for example, a spiral recess that generates a swirling flow is provided at the bottom of the water tank, and a submersible pump is installed in the water tank so that the suction port of the suction part extending downward is located in the recess. With the operation of the submersible pump, there has been proposed one that drains the sewage in the aquarium while generating a swirling flow in the sewage in the aquarium (see, for example, Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 9-209992 JP 2004-52396 A

  However, the suction port of the suction part of the submersible pump is configured so that its suction surface is parallel to the bottom surface of the water tank, and with the operation of the submersible pump, while causing a swirling flow in the sewage etc. in the water tank In order to drain the sewage in the aquarium, it is necessary to make the bottom of the aquarium into a special spiral shape so that a swirling flow such as sewage occurs. Difficult and expensive. In addition, if the water tank bottom does not have a special spiral shape that causes a swirling flow such as sewage, sewage etc. flows uniformly into the suction part from the entire circumference of the suction part of the suction part as the submersible pump is operated. However, the generation of swirling flow due to suction of sewage or the like is reduced, and in particular, foreign matter staying or depositing on the outer periphery of the bottom of the water tank cannot be effectively discharged.

  The present invention has been made in view of the above circumstances, and with a relatively simple configuration, the liquid in the aquarium can be drained while generating a swirling flow in the liquid at the bottom of the aquarium with the operation of the submersible pump. It aims at providing a drainage pump device.

The invention according to claim 1 is a drainage pump device for installing a submersible pump and pipes in a water tank to drain the liquid in the water tank. The pump suction of the submersible pump installed with the pump suction port facing downward The suction port is configured to have a certain suction angle between the vertical axis and the axis extending vertically at the center of the suction surface, and the upper end of the suction pipe extending in the vertical direction is connected to the mouth. The drainage pump device.

Thus, with the operation of the water pump, so as to flow into the suction pipe sewage or the like is turned from the entire circumference of the suction port of the suction pipe and uneven flow, swirl flow of sewage or the like water tank bottom Without making a special spiral shape, a swirling flow caused by suction of sewage or the like can be generated, and foreign matter staying or depositing on the bottom of the water tank can be efficiently discharged.

The invention according to claim 2 is the drainage pump device according to claim 1, wherein the suction angle is 5 to 90 °.
This suction angle is generally 5 to 90 °, preferably 30 to 90 °, and more preferably 45 to 90 °.

A third aspect of the present invention is the drainage pump device according to the first or second aspect, wherein a plurality of submersible pumps are arranged in the water tank with the suction ports of the suction pipes directed in different directions. .
In this way, by arranging a plurality of submersible pumps in the aquarium with the inlets of the suction pipes facing in different directions, a complicated swirling flow is formed at the bottom of the aquarium with the operation of the submersible pump. Thus, it is possible to prevent the foreign matter and the like from partially remaining.

According to a fourth aspect of the present invention, there is provided a drainage pump device according to any one of the first to third aspects, wherein a recess is provided in the bottom of the water tank, and the suction port of the suction pipe is positioned in the recess. is there.
Thereby, the quantity of sewage etc. which remain | survives without being drained in a water tank can be decreased more.

According to the drainage pump device of the present invention, it is possible to install the drainage pump device in the water tank simply and at low cost because the structure of the bottom of the water tank is spiraled or the like. In particular, when installing a plurality of submersible pumps, it is possible to prevent the foreign matter at the bottom of the water tank from partially staying or accumulating by directing the suction ports of the suction pipes in different directions.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding members are denoted by the same reference numerals, and redundant description is omitted.

  1 to 4 show a state in which a drainage pump device 10 according to an embodiment of the present invention is installed in a water tank 12 such as a sewage drainage tank including a manhole, for example. As shown in FIGS. 1 and 2, the drainage pump device 10 has two vertical submersible pumps 14, and each submersible pump 14 has an attachment / detachment device 16 and a discharge pipe 18 extending upward in the vertical direction. The discharge pipe 18 communicates with the common discharge pipe 20.

  As shown in FIG. 3, each submersible pump 14 is arranged with its suction port (pump suction port) 14 a facing downward, and the periphery of the pump suction port 14 a is surrounded by a strainer 24. Each submersible pump 14 is configured to move up and down along a pair of guide rails 26 of the attachment / detachment device 16 and to be installed at a predetermined position in the water tank 12. A discharge port (pump discharge port) 14 b of the submersible pump 14 is connected to an elbow pipe 28 of the discharge pipe 18 through a flow path 16 a in the attachment / detachment device 16, and the elbow pipe 28 is connected to a vertical pipe 30.

  A suction pipe 32 extending downward in the vertical direction is connected to the suction port (pump suction port) 14 a of each submersible pump 14. The suction pipe 32 constitutes a suction part, and the suction port (suction part suction port) 32a of the suction pipe (suction part) 32 has an axis AA and a vertical axis BB extending vertically at the center of the suction surface. And a suction angle θ of 90 °. As shown in FIG. 5, the suction angle θ formed between the axis AA and the vertical axis BB extending vertically through the center of the suction surface of the suction portion suction port 32a is generally 5 to 90. It is preferably 30 ° to 90 °, and more preferably 45 ° to 90 °.

  In this way, the suction portion suction port 32a is placed between the axis AA and the vertical axis BB extending vertically through the center of the suction surface of the suction port 32a, for example, a constant suction angle θ of 5 to 90 °. With the operation of the submersible pump 14, sewage or the like flows into the suction pipe (suction part) 32 in an uneven flow from the entire circumference of the suction part suction port 32 a. Thus, without making the bottom of the water tank 12 into a special spiral shape that causes a swirling flow of sewage or the like, a swirling flow by suction of sewage or the like is generated, and foreign matter staying or depositing on the bottom of the water tank 12 is collected. It can be discharged efficiently.

Furthermore, as shown in FIG. 4, one submersible pump 14 ( 14A ) and the other submersible pump 14 ( 14B ) are arranged so that the suction ports 32 a of their suction pipes (suction portions) 32 face different directions. In this example, they are arranged so as to face in directions orthogonal to each other. Thus, when installing a plurality of submersible pumps 14 in the water tank 12, the suction part suction ports 32 a are directed in different directions, so that the bottom of the water tank 12 is brought into operation with the operation of the submersible pump 14. A swirl flow having a complicated flow can be formed to prevent foreign matters and the like from partially remaining.

  According to this example, when the water level in the water tank 12 reaches a predetermined water level, the operation of the submersible pump 14 is started and drainage in the water tank 12 is started. At the time of discharging, a swirling flow such as sewage is generated at the bottom of the water tank 12 along with the pumping up of the sewage, and foreign substances staying or accumulating on the bottom of the water tank 12 are efficiently discharged from the discharge pipes 18 and 20 by this swirling flow. Discharged to the outside.

FIG. 6 shows a state in which the drainage pump device 10a according to another embodiment of the present invention is installed in the water tank 12. In this example, a recess 12 a is provided at the bottom of the water tank 12, and a suction port 32 a of a suction pipe (suction unit) 32 connected to the suction port of the submersible pump 14 is positioned in the recess 12 a. Other configurations are the same as those in the above embodiment.
Thus, by positioning the suction port 32a of the suction pipe (suction part) 32 connected to the suction port of the submersible pump 14 in the recess 12a provided in the bottom of the water tank 12, the inside of the water tank 12 is almost completely obtained. It can be drained.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

It is a longitudinal cross-sectional view which shows the state which installed the drainage pump apparatus of embodiment of this invention in the water tank. It is a top view of FIG. It is a longitudinal cross-sectional view which shows the detail of the drainage pump apparatus shown in FIG. It is a top view which shows the direction of the suction part suction inlet in the submersible pump shown in FIG. It is a figure which shows the suction angle of the suction part suction inlet in a submersible pump. It is a longitudinal cross-sectional view which shows the state which installed the drainage pump apparatus of further another embodiment of this invention in the water tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10a Drain pump apparatus 12 Water tank 12a Recess 14 Submersible pump 14a Pump suction port 14b Pump discharge port 16 Detachment device 18 Discharge pipe 20 Common discharge pipe 32 Suction pipe (suction part)
32a Suction port

Claims (4)

In a drainage pump device that installs a submersible pump and piping in the aquarium and drains the liquid in the aquarium,
In the submersible pump installed in the submersible pump with the pump suction port facing downward, the suction port configured to have a constant suction angle between the vertical axis and the axis extending vertically at the center of the suction surface A drainage pump device characterized in that the upper end of a suction pipe having a vertical direction is connected .   The drainage pump device according to claim 1, wherein the suction angle is 5 to 90 °. The drainage pump device according to claim 1 or 2, wherein a plurality of submersible pumps are arranged in the water tank with the suction ports of the suction pipes oriented in different directions. The drainage pump device according to any one of claims 1 to 3, wherein a concave portion is provided at a bottom of the water tank, and a suction port of the suction pipe is positioned in the concave portion.

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