JPH01111494A - Continuously connected type intermittent air water lifting cylinder - Google Patents

Abstract

PURPOSE:To increase the water lift circulation volume of an water area with small volume of compressed air and power consumption by connecting continuously a plurality of intermittent air lifting cylinders arranged at the same height in air storages attached to reverse syphon starting sections and making differences in the height of reverse syphon starting sections of respective air storages. CONSTITUTION:Foam messes 9 are discharged from respective air storage 2A and 2B into corresponding water lifting cylinder sections 1A and 1B by the reverse syphon action in intermittent air water lifting cylinders A and B at intervals and retaining time difference. Together with said discharge of foam masses, flows of small foam groups rising separately from respective water lifting cylinders 1A and 1B are risen continuously at small time intervals, deviating respective positions to a certain extent. As a result, entrained flow generated by said small foam groups are not offset but energized and grown to increase the circulation mixing effect of the water area.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a method for improving water quality in water bodies such as dams and reservoirs where a large amount of water is stored in a stagnant manner by improving circulation and oxygen supply. Concerning improvements to air pumping cylinders.

(Prior technology) In water bodies such as dams, reservoirs, and ports, where a thermocline occurs and the lower layer tends to become dead due to lack of oxygen, it is necessary to supply oxygen to the water and drain the water in the upper and lower layers. An inverted siphon-type intermittent air pumping tube is used as an effective device to improve water conditions by forcibly circulating and mixing to equalize and homogenize the temperature.

There are various types of intermittent air pumping tubes, but in principle they are all the same. They are installed on the bottom of a body of water, and an air reservoir chamber with a reverse siphon starter is attached to the bottom of the pumping tube. When the water level accumulates in the storage chamber and falls below the specified height of the reverse siphon starting part, the reverse siphon action works and the accumulated air is released all at once into the water pumping cylinder through the communication pipe, forming a mass of air bubbles and rising. Repeat.

The rising air bubbles forcefully draw an amount of water corresponding to the stroke into the water pumping cylinder section by the action of the piston and pump the water.

However, there are the following problems in increasing the amount of pumped water circulation with one unit of pumping air pumping cylinder.

(a) When a large amount of air is supplied to increase the frequency of air being released intermittently from the air reservoir to the pumping cylinder due to reverse siphon action, a single mass of air bubbles may move inside the pumping cylinder. During the ascent or immediately after leaving the pumping tube, the next bubble mass will be released into the pumping tube, and in this case, the stroke volume will decrease by the bubble mass volume, and the amount of water passing through the pumping tube will be It will hardly increase.

(b) When increasing the diameter of the pumping tube, it is necessary to form a large-diameter single bubble mass within the pumping tube, so the amount of air required for the increase in the cross-sectional area of the pumping tube is 3 no. It increases at the rate of the square, and efficiency and economy decrease.

(If the diameter of the C1 pumping cylinder part is made larger, the diameter will be 4
If it exceeds 0 to 50 cm, it becomes difficult for the air bubbles to be kept in one lump within the water pumping cylinder, and the air bubbles will bloom, resulting in a significant reduction in the piston action of the air bubbles.

Due to these problems, there is a limit to increasing the amount of pumping and circulation of a large amount of water with a single intermittent pumping tube.To overcome this limit, multiple small-diameter pumping tube sections are integrated into one A bundle type device has been proposed. (For example, see Utility Model Application No. 60-176300).

(Problems to be Solved by the Invention) The above-mentioned prior art multiple convergence type device of small-diameter spacer pumps is advantageous in terms of the amount of air required over a large-diameter, single-spacer air pump with the same cross-sectional area. However, there are the following problems in terms of the circulation flow induction effect. In other words, the amount of water pumped and circulated by the intermittent air pumping tube is larger than the amount of water that passes through the pumping tube and rises. In the process of rising, the surrounding water is brought along and an entrainment flow is induced. However, in the prior art multiple small-diameter pumping tube convergence type device, this small bubble group rising process is different from that in the case of a large-diameter single pumping tube. Similarly, they rise as a group of small bubbles concentrated in one place, and the air bubbles from each small diameter water pump are released at the same time, so the flow of this group of small bubbles becomes intermittent, resulting in an entrained flow. is not utilized effectively.

The present invention is characterized in that in an intermittent air pumping tube, the entrained flow accompanied by a group of floating small bubbles can be about 2 to 3 times larger than the flow passing through the pumping tube, and that the angular range of dispersion and rise of the group of small bubbles is about 17 The present invention was made with the aim of solving the above-mentioned problems of the prior art.

(Means for Solving the Problem) In order to achieve the above object, in the present invention, an air reservoir is provided at the bottom of each water pump so that a plurality of water pumps having a relatively small diameter are separated from each other and lined up in parallel. integrated and connected in the room,
Furthermore, differences are provided in the heights at which the air bubbles are generated in the respective air reservoir chambers, so that a difference in time between the occurrence of small bubble clusters is generated.

That is, the continuous type intermittent air pumping tube of the present invention specifically allows a plurality of intermittent air pumping tubes to be placed at the same height in an air reservoir chamber with a reverse siphon starter attached to their lower part in a body of water. The invention is characterized in that the reverse siphon starting parts are arranged side by side, and the heights of the reverse siphon starting parts are different for each air reservoir chamber.

(Function) According to the device of the present invention, the air bubbles released from each air reservoir chamber into the corresponding pumping cylinder section at intervals through the reverse siphon action in the intermittent air pumping cylinder are released while maintaining a time difference. Since the flow of small bubbles rising away from each pumping cylinder section is slightly shifted in position and rises one after another at short time intervals, the entrainment flow induced by the small bubbles is not canceled out but is rather encouraged. Since the entrained flow rate is generally larger than the in-cylinder flow, the circulation mixing effect of the water area can be improved.

(Examples) Hereinafter, the present invention will be specifically described based on examples with reference to the accompanying drawings. FIG. 1 shows a theoretical embodiment in which the number of intermittent air pumping cylinders is set to the minimum of 2 for ease of understanding, and which is the most hourly wheel type. In the following description, a plurality of intermittent air pumping cylinders and their attached parts will be distinguished by adding suffixes A, B, C, and D to the respective numerical symbols.

In FIG. 1, two interposed air cylinders (A) and (B) are arranged at their lower parts so that their relatively small diameter cylinder parts (IA) and (IB) are isolated from each other and lined up parallel to each other. It is constructed by arranging the attached air chambers (2A) and (2B) at the same height and integrally connecting them. The entire structure is moored by an anchor on the bottom of a body of water, for example, at the lower end of the connected air reservoir (2), and is held in an upright position underwater by the action of a float on the upper part.

At the center of the continuous air reservoir (2), there is an air supply hose (
There is a sealed air distribution chamber (4) to which pressurized air is supplied via (3), and air is supplied to each air reservoir chamber (4) via upper and lower multistage air distribution orifice holes (5A) and (5B) provided therein.
Pressurized air is supplied to each of 2A) and 2B.

Since the intermittent air pumping tubes (A) and (B) have the same structure except for the difference in the height of the air discharge tube, which will be described later, the structure will be explained in detail using one of them (8) as a representative. . Pumping cylinder part (
The air reservoir chamber (2A) attached to the lower part of IA) has a built-in reverse siphon starting part, and the upper end of its air discharge pipe (6A) opens at the lower end of the water pumping cylinder part (1Δ), and the air discharge pipe (6A)
) is surrounded by a cylinder (7A) whose lower bottom is closed and whose upper end is located near the ceiling of the air reservoir chamber to form a reverse siphon starting part. The height of the opening at the lower end of the air discharge pipe becomes the reverse ifon starting height.

The structure of the reverse siphon starting part of the intermittent air pumping tube (B) is the same, but the air discharge tube (6B) is
) is set so that the height of the lower end opening is separated from that of the air discharge pipe (6A) by a slight lid height (d) of several cranes. (8
A) (8B) is a suction port for the water in the water area to the water pumping cylinder (IA) (IB).

The device of this embodiment operates as follows. Hose (3)
When pressurized air is supplied to the distribution chamber (4) through, the water level in the distribution chamber (4) decreases due to the pressure, and the pressurized air passes through the air distribution orifice holes (5A) (5B) to the air reservoir chamber (2A). (2B) is evenly distributed and supplied. In each air reservoir (2A) (2B), the water level drops almost uniformly as the supplied air accumulates, but in the air reservoir (2A) the water level drops below the height of the lower end opening of the air discharge pipe (6A). The reverse siphon action is triggered, and the accumulated air in the air reservoir chamber (2A) is released into the water pumping cylinder (IA) in a short time and rises inside the water pumping cylinder (18) as a mass of air bubbles (9). External water is sucked through the suction port (8A) by piston action and pumped up. Due to the difference in height between the lower end openings of the air discharge pipes (6A) and (6B), that is, the difference in the height of the inverted IFON, the pumping action of the intermittent air pump (A) takes place with priority in terms of time.

After that, the water level in the air storage chamber (2B) will rise to the air release pipe (6B).
When it descends below the lower end of the air chamber (2B), the reverse siphon action of the air reservoir chamber (2B) is activated, and the air accumulated in the water pumping cylinder (IB) is released all at once, and the air is pumped up at once.

The embodiment shown in FIG. 2 has a large number of parallel intermittent air pumping tubes, for example four as shown in the figure, and parts equivalent to those in the previous embodiment are indicated by the same reference numerals or with different suffixes. , omitting repeated explanations.

Its four pumping cylinder parts (IA) (IB) (IC) (
10) are attached at regular intervals to one continuous air reservoir (2) at the bottom, and the air reservoir (2) is divided into four air reservoir chambers (2A) (2B) corresponding to each intermittent air pumping cylinder by a partition wall αΦ. )
It is divided into (2C) and (2D). Pressurized air is supplied to each air reservoir chamber by distribution at each nozzle 0 to one lower air supply pipe aυ instead of the air distribution chamber (4) of the previous embodiment. Air release pipe of each air storage chamber (6^
) (6B) (6G) (6D) are provided with a difference in the height of the lower end opening, that is, a difference in the height of the inverted ifon.

The partition wall Ql that partitions each air reservoir chamber has a small diameter air communication orifice α located higher than the reverse siphon starting part.
In this embodiment, at the beginning of air supply, the water level in each air reservoir chamber falls individually depending on the amount of air supplied from the nozzle (2). However, when the water level in each air reservoir chamber drops to a position lower than the air communication orifice αJ, each air reservoir chamber communicates through the orifice α■, and the water level in each air reservoir chamber becomes the same water level under the same pressure and falls. And the air chamber (
Since the lower end opening of the air discharge pipe (6A) of the air reservoir (2A) is at the highest position, a reverse siphon occurs first in the air reservoir chamber (28), and the accumulated air in the air reservoir chamber (2A) is released into the water pumping tube section (IA). )
is released. At that time, a small amount of air enters the air reservoir chamber (2B)
(2A), but when the air reservoir chamber (IA) is filled with water, the passage resistance of the orifice Q31 between them increases, so the water level in the air reservoir chamber (2B) will not rise suddenly. . Rather, the air discharge pipe (6A) (6B)
Even if there is a slight difference in height between the air chambers (
By suctioning from (2B) to (2A), the time difference between the onset of siphons in the compartments becomes wide (this is advantageous for the sequential onset of reverse siphons in a large number of interstitial air pumping tubes. ) After the activation of the siphon, (2B)
Subsequently, the water level in each air reservoir chamber keeps the same level and falls, but when it falls to the siphon initiation height of the air discharge pipe (6B) at the next higher position, the reverse siphon action of the air reservoir chamber (2B) is initiated. . Similarly, the following air reservoir chambers (2C) (
2D) siphon action occurs sequentially.

The embodiment shown in FIG. 3 is almost equivalent to the embodiment shown in FIG.
), each air reservoir chamber (2A) (2B) (2C) is used instead of the air communication orifice α in Figure 2.
(2D) A series of air communication pipes Q41 each having a lower end open at a position higher than the height of the inverted IFON firing height are provided,
A float valve (1
5A) (15B) (15C) (150).

In this example, each air reservoir chamber (2A) (2B) (2
C) The air supplied from each nozzle @ of the air supply pipe αυ is accumulated in (2D), and when the water level falls below the opening of the air communication pipe α, the water levels in each chamber match, as shown in the example in Fig. 2. However, when the reverse siphon starts from the air reservoir chamber (2A) where the height of the reverse siphon starting part is highest and the accumulated air is discharged to the pumping cylinder part (18), the air reservoir chamber (2A)
2A) causes the float of the float valve (15A) to rise and close, so air from other air storage chambers does not flow in.

Subsequently, the air reservoir chambers (2B) (2C) are opened at different time intervals.
Each time the reverse siphon action of (2D) is triggered and the accumulated air is released, the float valve (15B) (15C) (1
50) closes. Communication between the air reservoir chambers is cut off and air does not move until the water level drops below the opening of the air communication pipe α due to the subsequent air supply, so that the time difference operation of the reverse siphon becomes more reliable.

The serial installation of multiple intermittent air pumping tubes is not limited to series, and the fifth
As shown in the figure, an entrained flow induced by a group of small bubbles arranged in a circumferential row and rising from each pumping cylinder part can be caused to occur in a Mary Coraland style at a circulating movement position with a small time difference. In its center an air distribution chamber (4') can be arranged.

Also, the arrangement of intermittent air pumping cylinders is not limited to one row, but multiple rows,
For example, as shown in Fig. 4, a large number of pumping cylinder parts (
IA) to (IH) and air storage chambers (2A) to (2H) can be arranged, and it is only necessary to arrange an air distribution chamber (4") between the rows, and there is no need to use a large number of air supply hoses. .

(Effects of the Invention) In the device of the present invention, air bubbles are released at different times from a plurality of intermittent air pumps that are connected in a row, so that the flow of small bubbles rising away from the pumps becomes more continuous. This has the effect of increasing the entrained flow, and the amount of pumped water circulating in the water body can be increased with less pressure air and less power consumption.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of a principle embodiment of the continuous type intermittent air pumping cylinder of the present invention in the case of two cylinders, Fig. 2 is a longitudinal sectional side view of another embodiment of the invention, and Fig. 3 4 is a longitudinal sectional side view of still another embodiment of the present invention, FIG. 4 is a longitudinal sectional side view of the float valve, and FIG. 5 is a plan view showing one example of the serial arrangement of the intermittent air pumping tube of the present invention. FIG. 6 is a plan view showing the other side of the continuous arrangement. (A) (B) ... Intermittent air pumping tube, (IA) (
1B) (IC) (10) (IE) (IF) (I
G) (IH)... Lifting cylinder part, (2)... Continuous air reservoir, (2A) (2B) (2G) (2D) (2B
) (2F) (2G) (2H)...Air reservoir chamber, (
3)...Air supply hose, (4) (4') (4'')
... Air distribution chamber, (5A) (5B) ... Air distribution orifice hole, (6A) (6B) (6C) (6D)
... Air discharge pipe, (7A) (7B) ... Cylinder, (
8A) (8B)...Suction port, (9)...Bubble mass,
αω...Partition wall, αω...Air supply pipe, (2)...
・Nozzle, αto... Air communication orifice, Q4) ・・
・Air communication pipe, (15A) (15B) (15C)
(150) ・7 tff-to valve, (d)...lid height.

Claims (3)

[Claims] (1) A plurality of intermittent air pumping cylinders are arranged in series at the same height in the air reservoir chambers with the reverse siphon starting section attached to their lower parts, and the height of the reverse siphon starting section is different for each air reservoir chamber. A continuous type interlocking air pumping tube characterized by being provided with. (2) The inside of the continuous air reservoir is divided into each air reservoir chamber by a partition wall, and an air communication orifice that communicates the air reservoir chambers on both sides of the partition wall is partitioned at a position higher than the height of the reverse siphon starting part of each air reservoir chamber. A continuous interlocking air pumping tube according to claim 1, which is installed in a wall. (3) For the connected air reservoirs, each air reservoir chamber is provided with an air communication pipe that opens at a position higher than the height of the reverse siphon starting part, and each opening is provided with a float that closes when the reverse siphon of the air reservoir chamber is triggered. A continuous interlocking air water pump according to claim 1, which is provided with a valve.