JPH07252878A - Pump device - Google Patents

Abstract

PURPOSE:To simplify the shape and structure of a pump well, simplify the civil engineering work of the pump well, reduce the construction cost, and prevent the supernatant water from being left in the pump well. CONSTITUTION:A weir 5 is provided on a concrete pump well 2, the first water storage section 6 on an inflow pipe 1 side and the second water storage section 7 adjacent to the first water storage section 6 are formed, the first pump 8 is installed on the first water storage section 6, and the second pump 9 is installed on the second water storage section 7. The water W2 flowing into the first water storage section 6 from the inflow pipe 1 is drained by the first pump 8, and the supernatant water W1 flowing into the second water storage section 7 from the first water storage section 6 over the ridge 5A of the weir 5 is drained by the second pump 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device installed in a pump well.

[0002]

2. Description of the Related Art The water quality of a stored water W flowing into a pump well 2 from an inflow pipe 1 shown in FIG. 3 is different between the clear water W1 in a region near the water surface WL and the water W2 in a region lower than that. Therefore, it is required to separately drain the clear water W1 in the region close to the water surface WL and the water W2 in the region L lower than the clear water W1. Therefore, conventionally, the pump well 2 is provided with steps to form the pump installation surfaces 3 and 4, one submersible pump P1 is installed on the pump installation surface 3 at a high place, and the other is installed on the pump installation surface 4 at a low place. The submersible pump device is configured by installing the submersible pump P2 to satisfy the above-mentioned requirements. That is, one submersible pump P1 drains the supernatant water W1, and the other submersible pump P2 is operated to drain the water W2 in the low region L.

However, in the conventional submersible pump device, since the pump well 2 must be provided with steps to form the pump installation surfaces 3 and 4, the shape and structure of the pump well 2 becomes complicated. Therefore, the construction work of the pump well 2 is troublesome and the construction cost is high, and when the water surface WL of the stored water W becomes lower than the opening position of the suction port of one submersible pump P1, Pump P1
As a result, it becomes impossible to drain the supernatant water W1, and there is also a drawback that the supernatant water W1 remains in the pump well 2.

[0004]

The problem to be solved is that the pump well must have a step to form the pump installation surface, which complicates the shape and structure of the pump well. Therefore, the construction work of the pump well is troublesome, the construction cost is high, and when the water level of the stored water is lower than the opening position of the suction port of the submersible pump for clear water suction, the submersible pump can drain the clear water. It became impossible and the clear water remained in the pump well.

[0005]

According to the present invention, a weir is provided in a pump well to form a first water storage section on the inflow pipe side and a second water storage section adjacent to the first water storage section, A first pump for discharging water flowing in from the inflow pipe is installed corresponding to the first water storage section, and a first pump of the weir from the first water storage section is installed corresponding to the second water storage section. A second pump is installed to drain the overflow water that has flowed in over the ridges, aiming to simplify the shape and structure of the pump well, facilitate the construction of the pump well, and reduce construction costs. At the same time, the purpose of preventing the supernatant water from remaining in the pump well was achieved.

[0006]

According to the present invention, even if the first pump and the second pump are constructed by submersible pumps of the type in which they are installed on the pump installation surface, they can be installed on the pump installation surface without steps. Further, when the first pump and the second pump are constituted by a pump of a type that does not need to be installed on the pump installation surface (for example, a vertical axis pump), the formation of the pump installation surface can be omitted. Then, the water flowing from the inflow pipe into the first water storage section can be drained by the operation of the first pump, and the overflow water flowing from the first water storage section over the weir peak into the second water storage section. That is, the supernatant water can be drained separately by operating the second pump.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a vertical side view showing an embodiment of the present invention, and FIG. 2 is a schematic plan view of FIG. It should be noted that the same or corresponding parts as those in the conventional example of FIG.
In FIG. 1, a concrete pump well 2 includes a first water storage part 6 in which a weir 5 is provided and an inflow pipe 1 is opened, and a second water storage part 7 adjacent to the first water storage part 6. Has been formed. A pump installation surface 3 is formed on the bottom of the first water storage section 6, and a pump installation surface 4 is formed on the bottom of the second water storage section 7. Then, a first pump 8 made of a submersible pump is installed on the pump installation surface 3, and a second pump 9 made of a submersible pump is installed on the pump installation surface 4.
That is, the discharge port 10A of the first pump 8 is detachably connected to the discharge curved pipe 11A installed on the pump installation surface 3, and the outlet of the discharge curved pipe 11A is connected to the discharge pipe 12A. The pipe 12A includes a check valve 13 and a discharge valve 14.
Is connected to the drainage pipe 15A via. The discharge port 10B of the second pump 9 is detachably connected to the discharge curved pipe 11B installed on the pump installation surface 4, and the outlet of the discharge curved pipe 11B is connected to the discharge pipe 12B. The pipe 12B is connected to the drain pipe 1 via the check valve 13 and the discharge valve 14.
5B is connected. Reference numeral 16 in the drawing is a guide pipe, and the guide pipe 16 guides the up and down movement of the first pump 8 and the second pump 9 at the time of installation or maintenance and inspection.

With this structure, the water W2 flowing from the inflow pipe 1 into the first water storage section 6 can be drained by the operation of the first pump 8, and the water W2 from the first water storage section 6 can be drained. The overflow water W1, that is, the supernatant water W1 that has flowed into the second water storage section 7 beyond the peak 5A of the above can be separately discharged by the operation of the second pump 9. That is, the inflow pipe 1
The water W2 that has flowed into the first water storage section 6 from the water is discharged through the route of the discharge curved pipe 11A, the discharge pipe 12A, the check valve 13, the discharge valve 14 and the drain pipe 15A by the operation of the first pump 8. It In addition, the supernatant water W1 that has flowed from the first water storage section 6 over the peak 5A of the weir 5 into the second water storage section 7 is operated by the second pump 9 so that the discharge curved pipe 11B → the discharge pipe 12B → The check valve 13 → the discharge valve 14 → the drain pipe 15B is separately drained.

As described above, when the first pump 8 and the second pump 9 are installed on the pump installation surfaces 3 and 4 having no step, the water in the first water storage section 6 is operated by the operation of the first pump 8. W
2 can be drained and the supernatant water W1 of the second water storage section 7 can be drained by operating the second pump 9.
Even if the water quality of the water W2 in the water storage section 6 and the quality of the supernatant water W1 of the second water storage section 7 are different, it is possible to satisfy the requirement to separately drain these. Moreover, the shape and structure of the pump well 2 are simplified as compared with the conventional submersible pump device in which the pump installation surfaces 3 and 4 are formed by providing the pump well 2 with steps, so that the civil engineering work of the pump well 2 can be performed. It becomes easier and the construction cost can be reduced, and the clear water W1 does not remain unlike the conventional submersible pump device.

In addition, in the above-mentioned embodiment, the explanation has been given by using the one first pump 8 and the one second pump 9, but two or more first pumps 8 and the second pump 9 are used. Alternatively, the pump 9 may be used. In addition, the first pump 8 and the second
The pump 9 may be replaced with the submersible pump described in the above embodiment, and may be configured by a pump of a type that does not need to be installed on the pump installation surface (for example, vertical axis pump). By using such a pump, the formation of the pump installation surfaces 3 and 4 can be omitted, so that the shape and structure of the pump well 2 is further simplified.

[0011]

As described above, according to the present invention, the water flowing from the inflow pipe into the first water storage section can be drained by the operation of the first pump, and the weir peak from the first water storage section. The overflow water that has flowed into the second water storage section over, that is, the supernatant water can be separately drained by operating the second pump. Therefore, even if the water quality of the stored water in the pump well is different between the water in the supernatant water level area and the water in the lower level area, it is possible to satisfy the requirement to drain them separately. Moreover, even if the first pump and the second pump are constructed by submersible pumps of the type in which the first pump and the second pump are installed on the pump installation surface, they can be installed on the pump installation surface without steps, and the first pump and the second pump are installed. When it is configured by a type of pump that does not need to be installed on the surface, the formation of the pump installation surface can be omitted, so compared with the conventional submersible pump device in which the pump installation surface is formed by giving a step to the pump well,
The shape and structure of the pump well is simplified, the construction of the pump well becomes easier, the construction cost can be reduced, and the clear water does not remain in the pump well unlike the conventional submersible pump device.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a schematic plan view of FIG.

FIG. 3 is a vertical sectional side view of a conventional example.

[Explanation of symbols]

1 Inflow Pipe 2 Pump Well 5 Weir 5A Weir Peak 6 First Reservoir 7 Second Reservoir 8 First Pump 9 Second Pump W1 Overflow Water (Supernatant Water) W2 Flowing into Second Reservoir W2 Water flowing into the first reservoir

Claims (1)

[Claims] 1. A weir is provided in the pump well, and the first well on the inflow pipe side is provided.
And a second pump that forms a second water storage section adjacent to the first water storage section and discharges water flowing from the inflow pipe corresponding to the first water storage section. And a second pump for discharging the overflow water flowing from the first water storage section over the weir ridge corresponding to the second water storage section. .