JP2598177B2 - Vertical shaft pump device and operating method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical shaft pump device and a method of operating the same, and more particularly to a vertical shaft having a water suction tank of a pump station for performing a full water level operation provided mainly for draining out water during rainfall. The present invention relates to a pump device and an operating method of a vertical pump.

[0002]

2. Description of the Related Art A conventional apparatus is disclosed in, for example, Japanese Patent Laid-Open No. 2-787.
As described in JP-A-91, in order to make the drain start water level and the drain stop water level of a plurality of all water level operation vertical pumps different from each other, the pumps are arranged so that the impeller positions of the pumps are different. There is something.

[0003]

In the above prior art, a plurality of vertical pumps capable of operating at all water levels are arranged so that the impeller positions thereof are different from each other, thereby changing the height of each pump from the bottom surface of the water absorption tank. The starting water level and the stopping water level of each pump are changed. In this case, there were the following problems. (1) Since there is a portion having a different structure for each vertical shaft pump, compatibility between the pumps is lost. (2) Since the water levels at the start and stop of drainage of each vertical shaft pump are fixed, there is a difference in operation time between the pumps, resulting in a difference in service life. (3) In order to change the drain start water level and drain stop water level of each vertical pump, a large modification is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a plurality of vertical pumps installed in the same water suction tank and capable of operating at all water levels have the same structure and are compatible with each other. It is an object of the present invention to provide a vertical axis pump device and a method of operating the same, which can easily make the drainage start water level and the drainage stop water level different for each pump while having the above.

[0005]

In order to achieve the above-mentioned object, the most basic structure of the vertical shaft pump device according to the present invention is that a plurality of vertical shaft pumps having a mechanism capable of operating all water levels have the same water absorption. Vertical pump having a water absorption tank constituted by a plurality of sub water absorption tanks for each pump by arranging in parallel in the tank and submerging the side partition between the plurality of vertical pumps to divide the water absorption tank. In the apparatus, weirs having different heights are provided for the respective sub-water-absorbing tanks at inlets of the plurality of sub-water-absorbing tanks.

[0006] In order to achieve the above object, a more specific configuration of the vertical shaft pump device according to the present invention comprises a plurality of vertical shaft pump devices.
A plurality of vertical shaft pumps having a mechanism that enables full water level operation are arranged in parallel in the same water absorption tank, and a side partition is submerged between the plurality of vertical shaft pumps to divide the water absorption tank. In the vertical shaft pump device having a water absorption tank configured as a sub water absorption tank, the plurality of vertical shaft pumps are pumps of the same specification, and the installation position of each of these pumps is the same height from the bottom surface of the plurality of sub water absorption tanks. At the entrance of the plurality of sub-water-absorbing tanks, weirs having different heights are provided for each sub-water-absorbing tank, and the height of the weir is changed in the arrangement order of the plurality of parallel vertical pumps in parallel. In accordance with the water overflowing the weir when the water level rises, the drainage operation is started sequentially from the vertical pump of the sub-water-absorption tank with a lower weir to the vertical pump of the sub-water-absorption tank with a higher weir.

Furthermore, in order to achieve the above object, a method of operating a vertical shaft pump according to the present invention, the total water level operation of multiple
Possible vertical shaft pumps are arranged in parallel in the same water absorption tank, and sub-walls are submerged between the plurality of vertical shaft pumps to divide the water absorption tank, thereby forming a plurality of sub water absorption tanks for each pump. In the operation method of the vertical pump in the water tank,
The plurality of vertical pumps are pumps of the same specification, and the installation position of each of these pumps is the same height from the bottom surface of the plurality of sub water absorption tanks, and at the entrance of the plurality of sub water absorption tanks,
Weirs with different heights are provided for each sub-water absorption tank, and the heights of the weirs are changed in the order of arrangement of the plurality of vertical shaft pumps arranged in parallel. For the auxiliary water absorption tank that has reached the water level, the vertical pump of the auxiliary water absorption tank starts draining operation, the other vertical pumps are idled,
Next, the vertical pump of the sub-water-absorbing tank starts the draining operation for the next sub-water-absorbing tank that overflows the higher weir and reaches the predetermined water level, and the vertical pump of the sub-water-absorbing tank of the higher weir sequentially performs the draining operation. Is to start.

[0008]

In a water absorption tank in which a plurality of vertical pumps capable of operating at all water levels are installed, the inlets of a plurality of sub water absorption tanks partitioned by side partition walls provided between the vertical pumps are mutually high. Weirs are provided so as to differ from each other. Considering the case where the inflow of water from the headrace increases and the water level in the water absorption tank gradually rises, water passes over the weir in order from lower to higher weir (in other words, The water overflows the weir) and flows into the sub-absorption tank. The height of the weir reaches the drainage start water level of the pump in order from lower to higher, and starts draining sequentially. Conversely, when the inflow from the headrace diminishes and the water level gradually decreases, water cannot cross the weir in descending order of the weir, and water is The water in the sub-water-absorbing tank is drained in order from the highest weir, and the drainage is stopped sequentially when the drainage stop water level is reached.

[0009]

[Example 1]

First, FIG. 1 is a schematic plan view showing an arrangement relationship between a water absorption tank and a vertical shaft pump of a pump station according to one embodiment of the present invention, and FIG.
1 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB of FIG. 1, and FIG. 4 is a sectional view taken along the line CC of FIG. The embodiment shown in FIG. 1 shows an example in which three vertical pumps 7, 8, and 9 for all-water level operation for draining water during rainfall are installed in the same water absorption tank 1. is there.
The water absorption tank 1 is composed of a side wall 3, a side wall 5 and a rear wall 4, and is supplied with water from the water conduit 2. And
The water absorption tank 1 is divided into side water absorption tanks 13 and 1 by a side partition 6.
4, 15 and each sub water absorption tank 13, 14, 1
5 is provided with vertical shaft pumps 7, 8, and 9 for standby ahead.

The vertical shaft pumps 7, 8, 9 for full water level operation
Have exactly the same structure, the same performance and the same impeller height, that is, the same specifications. In addition, each sub water absorption tank 13, 14,
Weirs 10, 11, and 12 are installed at the entrance of the device 15. FIG. 2 is a sectional view taken along line AA of the auxiliary water absorption tank 13 in FIG. 1. The height of the weir 10 is H ₁₀ from the bottom surface 16 of the water absorption tank.
It is. Figure 3 is a sectional view taken along line B-B of the auxiliary water tank 14 in FIG. 1, the height of weir 11 is _{H 11} from the bottom surface 16. Figure 4 is a sectional view taken along line C-C of the auxiliary water tank 15 in FIG. 1, the height of weir 12 is _{H 12} from the bottom surface 16. Here, it is assumed that H ₁₀ <H ₁₁ <H ₁₂ . In FIG. 2 to FIG. 4, WL2 indicates a drainage start water level, WL1 indicates a drainage stop water level, and the pumps 7, 8, and 9 are all the same.

[0011] The pump for all water level operation is a pump regardless of the water level.
To the operating state, and the water level
Automatically starts draining when it reaches
When this happens , the drainage is automatically stopped. At other water levels,
The pump will run idle without draining even when in operation.
It has the function of continuing. To the information of the rain, in the state where the vertical shaft pump 7,8,9 is still waiting in the prior to idle state when a low water level, the water level of the water tank 1 is increased, the water level of H ₁₀ and H ₁₁ When we reach the middle, the water becomes weir 1
When the water level exceeds 0 and flows into only the sub water absorption tank 13 and the water level in the sub water absorption tank 13 reaches the drain start water level WL2, the vertical pump 7 starts draining. At this time, the other vertical shaft pumps 8 and 9 are still idling. Further, when the water level of the water absorption tank 1 rises and reaches a level between H ₁₁ and H ₁₂ , the water flows into the sub water absorption tank 13 as well as the sub water absorption tank 14 over the weir 11 and eventually. When the water level in the sub water absorption tank 14 reaches WL2, the vertical pump 8 starts draining following the vertical pump 7. At this time, the vertical shaft pump 9 is still idling. When the water level exceeds H ₁₂ further water level of the water tank 1 is raised, the water also flows into the sub-water tank 15 over the weir 12, vertical-shaft pump 9 where the water level of the secondary water tank 15 has reached the WL2 Also started draining, vertical shaft pumps 7, 8, 9
All three are now draining water.

Next, consider the case where the rain stops and the water level in the water absorption tank 1 decreases. There the water level of the water tank 1 is _{H 12} or more, lower the water level from a state in which three vertical-shaft pump 7, 8, 9 is operating _and becomes between _{H 12} and _{H 11,} water to the sub water tank 15 The vertical pump 9 is blocked by the weir 12 and only drains the water remaining in the auxiliary water absorption tank 15.
When the water level reaches the drain stop water level WL1, the drain is stopped. The other vertical pumps 7 and 8 continue draining. When the water level in the water absorption tank 1 is between H ₁₁ and H ₁₀ , the water flowing into the sub water absorption tank 14 is dammed by the weir 11, and the vertical shaft pump 8 only drains water remaining in the sub water absorption tank 14. When the inner water level reaches WL1, the drainage is stopped. Further water level of the water tank 1 is H ₁₀ or less, the water flowing into the auxiliary water tank 13 also dammed by the dam 10, vertical-shaft pump 7 remains in the sub-water tank 13 water
When the inner water level reaches WL1, the drainage is stopped, and in this state, the drainage of all three units is stopped, resulting in an idling state.

According to the present embodiment, the drain start water level and the drain stop water level of a plurality of (three in the example of FIG. 1) vertical pumps operating at the full water level are determined by keeping the impeller positions of the vertical pumps exactly the same. In other words, the pumps can be made different from each other with the same structure and the same installation position, so that the vertical pump is compatible. Therefore, it is economical because it is not necessary to make several types of pumps in the same station. Also, by changing the height of the weir, the order of starting drainage can be changed, so that the operation state can be made uniform. Furthermore, simultaneous drainage and simultaneous stoppage of a plurality of vertical pumps can be avoided, so that concentration of electrical load can be prevented, and sudden water level changes and surge phenomena in the water absorption tank can be mitigated.

Embodiment 2 FIG. 5 is a schematic plan view showing an arrangement relationship between a water suction tank and a vertical shaft pump of a pump station according to another embodiment of the present invention, and FIG.
FIG. 7 is a sectional view taken along the line EE of FIG. 5, FIG. 7 is a sectional view taken along the line FF of FIG. 5, and FIG. In the figure,
1 to 4 are the same as in the previous embodiment, and the description thereof will be omitted. The difference between the embodiment shown in FIGS. 5 to 8 and the embodiment shown in FIGS. 1 to 4 is that the weir provided in each sub water absorption tank is a trapezoidal weir. That is, trapezoidal weirs 17, 1 are provided at the inlets of the auxiliary water absorption tanks 13, 14, 15 in which the vertical pumps 7, 8, 9 are arranged.
8 and 19 are provided, and the heights of the trapezoidal weirs 17, 18, and 19 from the bottom surface 16 are H10, H11, and H12, which are the same as the weirs ₁₀ , ₁₁ , and ₁₂ , respectively. According to the second embodiment, the same effects as those of the first embodiment can be obtained.

[Embodiment 3] FIG. 9 is a schematic plan view showing an arrangement relationship between a water suction tank and a vertical shaft pump of a pump station according to still another embodiment of the present invention, and FIG. FIG. 11 is a sectional view taken along the arrow G in FIG.
FIG. 12 is a cross-sectional view taken along a line II-II in FIG. 9. In the figure, components having the same reference numerals as those in FIGS. 1 to 4 are the same as those in the previous embodiment, and the description thereof will be omitted. FIG.
12 differs from the embodiment shown in FIGS. 1 to 4 in that the weirs provided in each sub-water-absorbing tank are angled weirs. That is, the vertical pump 7,
At the entrances of the sub-water-absorbing tanks 13, 14, 15 in which 8, 9 are arranged, corner drop weirs 20, 21, 22 are provided. H10, H11, and H12, which are the same as the previous weirs ₁₀ , ₁₁ , and ₁₂ , respectively. As shown in FIGS. 10 to 12, the corner drop weir 2
For 0, 21 and 22, the height of the weir can be easily changed arbitrarily by stacking square timber. According to the third embodiment, the same effects as those of the first embodiment can be obtained.

[0016]

As described above in detail, according to the present invention, a plurality of vertical pumps installed in the same water absorption tank can be easily replaced with each other while maintaining the same structure and compatibility with each other. It is possible to provide a vertical shaft pump device and a method of operating the same, which can make the drainage start water level and the drainage stop water level different from each other.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an arrangement relationship between a water absorption tank and a vertical shaft pump of a pump station according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a sectional view taken along the line CC of FIG. 1;

FIG. 5 is a schematic plan view showing an arrangement relationship between a water absorption tank and a vertical shaft pump of a pump station according to another embodiment of the present invention.

FIG. 6 is a sectional view taken along the line DD of FIG. 5;

FIG. 7 is a sectional view taken along the line EE of FIG. 5;

8 is a sectional view taken along the line FF in FIG. 5;

FIG. 9 is a schematic plan view showing an arrangement relationship between a water absorption tank and a vertical shaft pump of a pump station according to still another embodiment of the present invention.

FIG. 10 is a sectional view taken along line GG of FIG. 9;

FIG. 11 is a sectional view taken along the line HH of FIG. 9;

FIG. 12 is a sectional view taken along the line II of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water absorption tank 6 Side partition 7, 8, 9 Vertical shaft pump 10, 11, 12 Weir 13, 14, 15 Sub-water absorption tank 16 Bottom 17, 18, 19 Trapezoidal weir 20, 21, 22 Square drop weir

Claims (5)

(57) [Claims] 1. A mechanism that enables a plurality of units to operate at all water levels.
The vertical shaft pumps are arranged in parallel in the same water absorption tank, and a plurality of sub water absorption tanks are formed for each pump by partitioning the water absorption tank by submerging the side wall between the plurality of vertical shaft pumps. A vertical shaft pump device having a water absorption tank, wherein weirs having different heights are provided for each of the sub water absorption tanks at inlets of the plurality of sub water absorption tanks. 2. A mechanism for enabling a plurality of units to operate at all water levels.
The vertical shaft pumps are arranged in parallel in the same water absorption tank, and a plurality of sub water absorption tanks are formed for each pump by partitioning the water absorption tank by submerging the side wall between the plurality of vertical shaft pumps. In the vertical shaft pump device having a water absorption tank, the plurality of vertical shaft pumps are pumps of the same specification, and the installation positions of these pumps are the same height from the bottom surface of the plurality of sub water absorption tanks. At the entrance, weirs with different heights shall be provided for each sub-water absorption tank, and the height of the weirs will be changed in the arrangement order of the multiple vertical pumps arranged in parallel, and the weir will overflow when the water level rises due to rainfall A vertical shaft pump device characterized in that a drainage operation is sequentially started from a vertical shaft pump of a secondary water absorption tank with a lower weir to a vertical shaft pump of a secondary water absorption tank with a higher weir according to water. 3. The vertical shaft pump device according to claim 1, wherein the weir is a corner drop weir, the height of which is made variable by stacking square timber. 4. A plurality of vertical pumps capable of operating at all water levels are arranged in parallel in the same water absorption tank, and a side partition is submerged between the plural vertical shaft pumps to partition the water absorption tank.
In the operation method of the vertical shaft pump in the water absorption tank configured with a plurality of sub water absorption tanks for each pump, the plurality of vertical shaft pumps are pumps of the same specification, and the installation position of each of these pumps is determined from the bottom surface of the plurality of sub water absorption tanks. With the same height, at the inlet of the plurality of sub-water absorption tanks, weirs having different heights are provided for each sub-water absorption tank, and the height of the weir is changed in the arrangement order of the plurality of parallel vertical pumps. When the water level rises due to rainfall, the vertical pump of the auxiliary water absorption tank starts draining operation for the auxiliary water absorption tank that overflows the low weir and reaches a predetermined water level, the other vertical axis pumps idle, and then The vertical pump of the sub-water-absorbing tank starts draining operation for the next sub-water-absorbing tank that overflows the high weir and reaches a predetermined water level, and the vertical pump of the sub-water-absorbing tank higher than the weir starts draining operation sequentially. It is characterized by Operating method of standing axis pump that. 5. A vertical pump in a suction tank having a high weir performs a draining operation when the water level falls, and then a vertical pump in a water absorbing tank having a lower weir performs a draining operation.
5. The operating method of the vertical shaft pump according to claim 4, wherein the vertical shaft pumps of the lower sub-water suction tanks of the weirs sequentially perform the drainage operation, and stop the drainage when the respective drainage stop water levels are reached. .