JPH0533760Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a large-capacity water pumping device that aims to efficiently purify water in open water surfaces such as lakes, marshes, dams, and ponds. Regarding.

(Prior Art) Many proposals have been made regarding conventional intermittent air supply pumping devices, and each has been put into practical use. In particular, as a large-capacity pumping device, a device is known in which the inside of a large-diameter pumping cylinder is divided vertically, or a device in which small-diameter pumping cylinders are used in parallel (Utility Model No. 176300
issue).

(Issues to be solved through innovation) Conventionally, intermittent air pumping devices have been highly effective in increasing the amount of dissolved oxygen in lakes, ponds, dams, etc. and improving water quality, and have been installed in more than 100 locations in Japan. The number of requests for installation has been increasing in recent years.
According to past experience, when lakes, ponds, etc. have an ideal cross-sectional shape (e.g. mortar shape) and are located at great depths (e.g. 30m or more deep), a pumping tube with a diameter of 50cm and a length of 10m or more is recommended. It has been found that one unit can purify 1 million ^m3 of water. According to the above criteria,
For 10 million ^m3 , 10 units are required, and for 100 million ^m3 , 100 units are required, but if there are more than 10 units, maintenance becomes extremely complicated and management becomes difficult, so there is a demand for a reduction in the number of installed units. Originally, the purpose of pumping water with a water pump was to circulate water vertically and convectively (No. 7)
(Fig.), it is sufficient if energy can be imparted to the water through vertical convection circulation. Normally, it is assumed that by increasing the diameter of the water pump, the purpose of circulation can be achieved with a smaller number of pumps. Therefore, the diameter of the water pump was changed from 50 cm.
When increasing the length sequentially to 60 cm, 70 cm, 80 cm, 90 cm, and 1 m, it was found that the efficiency was almost maintained at the specified level up to 80 cm, but after 90 cm, the efficiency decreased significantly. The reason for this is that as the diameter of the water pump increases, even if the bubbles initially form a single bubble, after passing a certain length, the bubbles become more likely to break and do not maintain their correct shape and float, resulting in a decrease in buoyancy. It was estimated that the pumping capacity would decrease. In order to improve the above problem, if four pumping tubes with a diameter of 50cm are used together, the pumping capacity will be equal to that of one pumping tube with a diameter of 1m.
It turned out to be bigger than a book. In addition, a pumping tube with a diameter of 80cm was found to have 2.5 times the pumping capacity of a pumping tube with a diameter of 50cm. Therefore, a composite tube made by bundling four water pumping tubes with a diameter of 80 cm has the same lifting capacity as ten water pumping tubes with a diameter of 50 cm. Therefore, even when purifying water from a dam with a water volume of 100 million ^m3 , installing 10 composite tubes made up of four pumping tubes with a diameter of 80 cm will be sufficient to achieve the purpose, significantly reducing the complexity of maintenance management. can.

Next, as a concrete structure, if an air chamber is provided for each small-diameter water pump, then air can be supplied to a group (about 2 to 10 small-diameter water pumps) from the same or different compressors. However, there is a difference in the amount of pressurized air accumulated in each air chamber, and it is often difficult to exhaust the air all at once. For example, errors in the capacity of the air chamber,
Even if there are unavoidable manufacturing differences such as minute inclinations of the air chambers or differences in the shape of the air passage holes, it is difficult to simultaneously pump out the same amount of water, and in the end there are differences in the amount of water pumped from each pump and the timing of release. There was a risk that this would occur. If pumped water is not released all at once at the same location, the same effect as in the case of continuous pumping occurs, and the diffusion range becomes significantly narrower.

In other words, when cold water near the bottom is lifted to the surface by the water pump (Figure 7) (for example, water with a water temperature of 10°C is lifted to the water surface with a temperature of 15°C), it rapidly mixes with the water near the water surface, and for example, the water temperature becomes 14°C. ℃~14.5℃, and the specific gravity becomes stable. Therefore, this mixed water spreads radially in the horizontal direction as shown by arrow 47 through a water layer corresponding to, for example, 14° C. (for example, at a depth of 1 m below the water surface).

According to the experimental results, the diffusion distance is 300m~
It turned out to be over 1000m long. Therefore, in a normal dam, etc., it is assumed that the water will spread toward the shore as shown by arrow 48 in Figure 7, then descend as shown by arrow 49, and pass through the water bottom as shown by arrow 50 to reach the pumping tube. It returns to the point where it mixes with the pumped water again as shown by arrow 51.

However, if the water cannot be pumped all at once, it will be similar to continuous pumping, and the pumped water and the water near the water surface will not mix sufficiently, so the 10℃ water will become, for example, about 12℃, and will settle near the pumping tube. . originally,
Intermittent water pumping has been considered an effective method because it has the effect of drawing water with a high amount of dissolved oxygen near the water surface into the water over a wide area and rapidly improving the overall amount of dissolved oxygen. However, if the range of vertical convection is narrow, there is a problem that the original purpose of the water pump cannot be achieved due to the above-mentioned reason.

In addition, even if the air chamber is made to have the same exact shape, it may be slightly sloped due to underwater installation.
If it is shaken by waves, the rise of the air mass will be delayed, making it difficult to pump water all at once.

(Means for solving the problem) However, in this invention, a large area approximately equal to the total cross-sectional area of each pumping cylinder is installed between the lower end of a group of pumping cylinders and the upper end of the pumping base of the intermittent air supply system. Diameter straightening tubes were connected, which rectified the water sent out from each small-diameter pumping base tube, combined the rising air masses into one, and adjusted the forward and backward speeds and slow speeds of each air mass within the pumping tube. .

That is, this invention is a pumping system in which a plurality of pumping cylinders are equipped with an intermittent air supply device, in which a rectifying cylinder is connected between the lower ends of the plurality of pumping cylinders and the upper end of the pumping base cylinder of the intermittent air supply system. was configured. The plurality of water pumps mentioned above may have a structure in which a plurality of independent water pipes are integrated in parallel, or a structure in which the inside of a large diameter water pipe is divided into a plurality of sections by partition plates parallel to the center line. The number of water pumps in the above is 2
Although it is possible to have more than 10 books, in practical terms 2
There are about 10 to 10 books.

Further, the intermittent intake device is configured by connecting one air chamber or a plurality of air chambers.

The cross-sectional area of the straightening tube in the above is approximately equal to or slightly larger than the total cross-sectional area of the small-diameter pumping tube,
The length is such that it can form an air mass or rectify rising water, and for example, a length of 1.5 to 3 times the diameter is appropriate.

(Function) In other words, according to this invention, one rectifying tube is provided in series between the plurality of small-diameter water pumping tubes and the intermittent air supply device, so that the air discharged from the pumping base tubes merges within the rectifying tube. However, since the rising water is also rectified and then divided into a plurality of small-diameter water pumping cylinders, the conditions as a whole are almost the same.

(Embodiment 1) An embodiment of this invention will be described based on the embodiments shown in FIGS. 1 to 4.

That is, a rectifying cylinder B is connected to the upper part of the air chamber A, and the lower ends of a group of four small-diameter water pumping cylinders C are connected to the upper part of the rectifying cylinder B. The air chamber A includes four pumping base cylinders 1,
Outer cover cylinders 2, 2a, 2b, 2c having an arcuate cross section are installed concentrically at a predetermined interval on the outer periphery of each of 1a, 1b, 1c, and outer cover cylinders 2, 2a, 2b, 2c,
Two partition tubes 3 and 4 each having an arc-shaped cross section are vertically installed at predetermined intervals between each of the pumping base tubes 1, 1a, 1b, and 1c. ，
Closing plates 5, 5a, 5 are installed between the outer wall of 1c and the outer cover tubes 2, 2a, 2b, 2c and the upper parts of the partition tubes 3, 4.
The air chambers a, b,
This is a configuration of c and d.

A pressurized air supply pipe 6 is connected to the lower end of the outer cover cylinder 2, and the outermost chambers 7, 7 of each air chamber a, b, c, d have communication holes 8, 8 in the connecting wall. Because it is provided, it constitutes an air chamber A that is virtually all in communication. In the figure, D is a collection cylinder connected to the pumping cylinder group C.
9, 10, 11 are each pumping base cylinder 1, 1a, 1b, 1
These are ventilation holes provided in the upper part of c and the lower or upper wall of each partition tube 3, 4.

The operation of the device will be explained with respect to the above embodiment.
First, air pressurized by a compressor (not shown) is supplied through the hose 12 as shown by the arrow 13 in FIG. enter. Since the individual air chambers a, b, c, and d communicate through communication holes 8 and 8 provided in the connecting walls 15 of all the outermost chambers, pressurized air is supplied to all the outermost chambers 7 at the same time. Ru. Therefore, pressurized air is supplied to each vent hole 9.
as shown by arrow 16, air chambers a, b, c,
d, and as the amount of air increases, the water level in that area gradually decreases. When the water surface reaches the ventilation hole 10 (dashed line 17 in the figure), air chambers a, b, c, d
The air inside passes through the ventilation holes 10, 11 as shown by arrows 18, 19, 20, and enters each pumping base cylinder 1, 1a, 1.
b, 1c and enters the rectifier cylinder B. Rectifier tube B
As shown in FIGS. 4 and 5, a partition 21 is inserted into the inside of the upper end to divide the inside into four parts, so that the air mass 2 that rises as a group inside the rectifying cylinder can be divided into four parts.
2 and the pumped water are divided into four parts by the partition 21, enter each of the water pumping cylinder groups, form a shaped plane-shaped air mass 23, and rise. Although the cylinder length of this pumping cylinder group varies depending on the water depth, for example,
It is over 10m long and is the part that exerts the greatest lifting power.

The air that has risen as described above reaches the concentrating cylinder D, which is connected as necessary, where it becomes a group again and is discharged to the outside world.

The water pump of this invention is installed in a dam, lake, swamp, etc., as shown in FIG. 7, for example. When pressurized air is supplied to the air chamber as described above, the pumped water is once blown up to the water surface as shown by arrow 46, mixes with the nearby water, and then descends to an isothermal depth and flows through the area as shown by arrow. 47,
48, it spreads laterally. The water that has once risen thereupon becomes depressed as shown by the chain line 52 due to diffusion, so that the water on the water surface moves as shown by the arrows 53, 53, corresponding to the next pumping up of water. In other words, the water surface temperature is maintained at all times. 54 in the figure is a floating chamber;
55 is a weight.

As mentioned above, the pressurized air that exits the air chamber of the intermittent air supply device becomes a group in the straightening tube, then divided by a group of small-diameter water pumping tubes, and then further grouped in a concentrator tube.
Even if there is some fluctuation when exiting each air chamber, it is naturally corrected while ascending the straightening tube, and is supplied into the small-diameter water pumping tube in almost the same state. Therefore, the amount of water rising in each pumping cylinder is also approximately equal.
Even if it is not uniform, simultaneous pumping will be maintained.

Next, FIG. 8 shows the amount of water rising in the water pumping cylinder in relation to time. In other words, the air mass is at its maximum immediately after it is released from the tip of the water pump, and
Then it decreases rapidly. This will be repeated.

(Embodiment 2) Another embodiment of this invention will be described with reference to FIGS. 5 and 6.

That is, as an intermittent air supply device, an outer cover tube 25 is loosely fitted around the outer periphery of a large-diameter pumping basic tube 24, and the outer cover tube 2
5 and the pumping base cylinder 24, there are partition cylinders 26 and 27 between
are loosely fitted at predetermined intervals, and between the lower part of the partition tubes 26 and 27 and the pumping base tube wall, and between the upper end of the outer cover tube 25 and the partition tube 2.
The outer wall of 7 and the upper end of the partition tube 27 and the pumping base tube 24
The outer walls of the cylinders are closed with closing plates 28, 29, and 30, respectively. The upper end of the pumping base cylinder 24 is extended as it is to form a straightening cylinder B, and a small diameter pumping cylinder group C is connected to the straightening cylinder B via a flange 31, as in the first embodiment. Moreover, inside the flange 31,
A partition 21 is fitted in a cross shape, and evenly distributes the air mass 32 rising in the straightening tube B and the pumped water to each of the pumping tubes 33, 33 of the pumping tube group C. Said partition 2
1 is approximately the height of the funnel-shaped portion 34 of the rectifying tube B, but it can also be extended downward as shown by the chain line in FIG. 5 to facilitate divisional rectification of air masses, etc.

In the above embodiment, the operation above the rectifier tube B is the same as in the first embodiment, but since the intermittent air supply device is a single pumping base tube, this point will be explained. First, pressurized air is supplied from a compressor (not shown) through a hose 35 to the air supply port 3 as shown by an arrow 36.
7, it is fed into the air chamber 38 on the side of the outer cover cylinder as shown by the arrow 39. This pressurized air passes through the ventilation hole 40 and enters the air chamber 38a between the partition tubes 26 and 27.
The water level in the area is gradually lowered. When the water level reaches the vent hole 41, the air accumulated in the air chambers 38, 38a moves through the vent hole 41 of the partition tube 27 as indicated by the arrow 43.
It passes through the pumping base cylinder 24 as shown in the arrow 44 through the ventilation hole 42 of the pumping base cylinder 24, and goes up inside the rectifying cylinder B as shown by the arrow 45, and is divided by the partition 21. After that, it is distributed to pumping cylinder group C.

(Effect of the invention) In other words, according to this invention, since the large-diameter rectifying tube is connected to the lower end of the group of small-diameter pumping tubes, the air masses are brought together in almost the same state into each small-diameter pumping tube. Since the water is divided and the water is divided, each pumping tube pumps up water at the same time, which has the effect of improving diffusion efficiency.

As mentioned above, this idea uses a rectifying tube, so the air mass and water are divided and supplied to the water pumping tube group, and even if there is some error in the amount, the air and water are The feeding is carried out almost simultaneously, and there is no risk that the timing of discharge from each pumping cylinder will be inconsistent.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted front view of the embodiment of this invention, Fig. 2 is a partially cutaway front view, Fig. 3 is a partially cross-sectional plan view, and Fig. 4 is also a partially cutaway front view. FIG. 5 is a cross-sectional view of another embodiment, FIG. 6 is a cross-sectional view taken along line E--I of FIG. 5, FIG. 7 is a diagram showing the installed state, and FIG.
The figure is a graph showing the relationship between the amount of water rising in the pumping cylinder and time. 1, 1a, 1b, 1c... Pumping base cylinder, 2... Outer cylinder, 3, 4... Partition cylinder, A... Air chamber, B...
Rectifying tube, C... Lifting tube, D... Consolidating tube.

Claims (1)

[Claims for Utility Model Registration] 1. In a water pumping system in which a plurality of water pumping cylinders are equipped with an intermittent air supply device, a rectifying pipe is connected between the lower ends of the plurality of water pumping cylinders and a pumping base cylinder of the intermittent air supply device. Large-capacity water pumping equipment. 2. The large-capacity water pumping device according to claim 1, wherein the plurality of water pumping tubes are a plurality of independent water pumping tubes integrated in parallel, or a large-diameter water pumping tube whose interior is divided into a plurality of parts. 3. The large-capacity water pumping device according to claim 1 of the utility model registration claim, wherein the length of the rectifier tube is equal to or greater than the diameter. 4. The large-capacity water pumping device according to claim 1, wherein the rectifying cylinder is provided with partitions inside the upper part of the large-diameter cylinder in correspondence with the number of small-diameter pumping cylinders. 5. The large-capacity water pumping device according to claim 1, wherein the intermittent intake device is configured by communicating one air chamber or a plurality of air chambers.