JPH01164495A - Large-capacity intermittent-air water lifting cylinder device - Google Patents

Abstract

PURPOSE:To surely move plural water lifting cylinders in the vertical direction by arranging the cylinders at the same height, and providing an air chamber furnished with an inverted siphon below each cylinder. CONSTITUTION:The air chambers 7a, 7b, and 7c corresponding to the three water lifting cylinders 2a, 2b, and 2c are separately connected to a common header 11A through air supply hoses 13a, 13b, and 13c. When the air chamber 2a is floated, the outlet position of the hose 13a is raised, the air supply rate to the air chamber 2a is increased, and the air supply rate to the other chambers 2b and 2c is decreased. When the air in the chamber 2a is discharged and the chamber 2a is sunk, the chamber 2a between the chambers 2b and 2c contg. a larger amt. of air is then floated, and the air is discharged. The chamber 2c is then floated, and the air is discharged. The intermittent discharge of air is repeated in this way, and the water lifting and circulating efficiency is improved.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is directed to a dam reservoir, a port, etc. where the water depth is generally deep, and the stored water separates into an upper layer and a lower layer with the thermocline as a boundary and mixes. For water areas where water quality tends to deteriorate without
This invention relates to an improvement in a device that is installed at the bottom of the water and supplies oxygen to the water while simultaneously circulating the water in the upper and lower layers to purify the water quality.

(Prior art) As one of the devices suitable for the above purpose, the Japanese Patent Publication No. 42
An intermittent air pumping cylinder device utilizing a reverse Zyphon effect, such as No. 5975, is used. This device is installed underwater, and a reverse siphon is built into the air chamber below the pumping cylinder.When air continuously received from an external air source accumulates in the air chamber and reaches a certain amount, the reverse siphon is activated. The siphon operates and sends the accumulated air all at once into the water pumping cylinder.
In this way, external water is sucked and pumped by the piston action of the air bubbles that intermittently rise inside the water pumping cylinder.

The time interval for this intermittent pumping is usually about 5 to 10 seconds. This device is required to have as large a pumping capacity as possible in one device at one location and to have high pumping efficiency for the purpose of forcing circulation of water over a wide area of water.

However, in an intermittent air pumping tube device with a single pumping tube, one way to increase the pumping capacity is to increase the amount of air supply and shorten the time interval between air discharge from the air chamber to the pumping tube by the reverse siphon. Then, immediately after one bubble mass is rising inside the pumping cylinder or leaves its upper end, the next bubble mass is released into the pumping cylinder, and due to the inertia of the water flow in the pumping cylinder following the bubble mass. The effect of inertial flow is inhibited, and the amount of water pumped per amount of air consumed decreases.

As another means, if the diameter of the pumping cylinder is increased depending on the scale-up effect, the amount of air required to form a stable bubble mass within the pumping cylinder increases at a rate of the cube of the diameter. Further, if the diameter of the cylinder exceeds 40 to 50 cm, a single air bubble cannot be stably formed within the pumping cylinder, and the effect of generating a pumping flow by the action of the piston is significantly reduced, similar to a broken piston.

Because of this limitation due to the physical behavior of the bubble mass,
When large-capacity pumped water circulation is required,
As in No. 176300, it has been proposed to provide a device in which a plurality of small-diameter intermittent air pumping tubes are integrated together.

(Problem to be Solved by the Invention) The behavior of the water flow in the pumping circulation of an intermittent air pumping tube device in a water area such as a reservoir is determined by the amount of the pumping flow and inertial flow passing through the pumping tube section from the upper end of the pumping tube section. In the process in which the released bubble mass disperses into small bubble groups in the water body and rises, there is a larger amount of entrained flow that attracts surrounding water, and the amount of entrained flow can be several times the amount of the above-mentioned in-cylinder flow. .

However, in the device of Utility Model Application Publication No. 176300/1983, after the divided air bubbles are simultaneously released from multiple pumping tubes, only one air bubble is released during the dispersion process of the air rising in the water area. As in the case where the small bubbles are concentrated in one place and rise, and this only occurs intermittently at long time intervals, the effect of increasing the entrained flow is poor.

Even if air chambers with reverse siphons are individually provided for each of the plurality of water pumping cylinders, the time intervals for the activation of the reverse siphons may differ depending on the difference in the capacity of each air chamber, the difference in the distribution of air supply, etc. The discharging operations of the differently divided cell mass are performed irregularly and unrelated to each other, and there is no significant improvement in the degree of complexity of the structure.

(Means for Solving the Problems) In order to solve the above-mentioned problems associated with the increase in the capacity of the intermittent air pumping tube device of the prior art, the present invention provides a solution to the above-mentioned problems caused by the increase in the capacity of the intermittent air pumping tube device of the prior art. When dividing into multiple small-diameter pumping tubes, if the amount of air is the same, it is better to release large bubbles from one pumping tube at long time intervals, or to release divided bubbles at irregular time intervals. This was done based on the knowledge that a larger entrainment flow could be obtained by discharging intermittent divided air bubbles from the divided pumping cylinder part as regularly as possible at short time intervals to make the intermittent discharge continuous. be.

In the present invention, the air is discharged regularly from the lower air chamber to each pumping cylinder, and the intermittent upper air flow generated at the top of the pumping cylinder is made continuous as much as possible to create an entrained flow. Try to increase it. Therefore, multiple pumping tubes are arranged at the same height, and an air chamber with an inverted siphon is provided below each pumping tube so that it can move up and down.The header centrally receives air continuously supplied from the outside. is installed near the header, and air supply hoses are connected individually from the header to each air chamber so that air is regularly distributed and supplied to each air chamber as the air chamber moves up and down. This also ensures that the air chambers move up and down in a regular sequence.

In summary, the large-capacity intermittent air pumping tube device of the present invention has a structure in which a plurality of pumping tube sections are installed at intervals on a common holding frame, and these are moored to bottom anchors, and each pumping tube is moored by a float. The water cylinder portions are held at the same height in the water body in an upright state, and an air chamber portion incorporating a reverse siphon is provided in the holding frame corresponding to each water pumping cylinder portion so as to be movable up and down. The present invention is characterized in that a flexible air hose is individually connected to each air chamber from a part of a common header that receives air from an external air source, so that air can be distributed and distributed to each air chamber section.

(Function) When the amount of stored air exceeds a certain amount, each air chamber rises due to its buoyancy. The outlet of the connected air supply hose will be higher in the air chamber that surfaced the fastest, so air will be supplied from the header with priority over other air chambers due to the difference in water level, and the air chamber will quickly rise to the surface. Reach the reverse siphon initiation state. Then, when the reverse siphon is activated, the air in the air chamber is released all at once, and the air chamber releases all the air that can be released, becomes the minimum air holding amount, loses buoyancy, and descends.

Subsequently, the other air chamber section with the largest amount of air storage floats up and releases air in the same manner. In this way, the continuously supplied air is distributed and supplied to the air chambers that alternately rise in a fixed order, so the amount of air distributed to each air chamber is equalized, and each air chamber is Air is discharged from the tank to the pumping cylinder at approximately equal time intervals.

(Examples) Hereinafter, the present invention will be specifically described based on examples with reference to the accompanying drawings. Fig. 1 shows an embodiment in which the number of pumping cylinders is the minimum of 2 in order to show the basic structure of the present invention, and Fig. 2 shows the installation situation and operating situation in a water body. .

In this example, this large-capacity intermittent air pumping cylinder device (1) has two
Two equally constructed water pumping cylinders (2a) and (2b) are arranged at intervals on a common holding frame (3) through which water can freely pass. As shown in FIG.
4) with wires (5), and the floats (61 (61) at the top of each cylinder maintain a buoyancy balance and take a constant posture near the bottom of the water. In this posture, both lifting cylinders (2a)
(2b) is held upright at the same height in the body of water.

Inside the holding frame (3) through which water can freely flow, each water pumping cylinder part (2a) (
2b) corresponding to the air chambers (7a) and (7b), respectively.
will be established. To explain the structure of one of them (7a),
Air chamber part (7a) that forms an air pocket in an inverted cup shape on the outside
) has an air discharge pipe (8a) installed at the center of its upper base that passes through a guide tube (9a) on the bottom plate of the water pumping tube section (2a), and slides up and down within the holding frame (3) using the guide tube (9a) as a guide. It is movable, and the lower end of the air chamber (7a) is closed, and the lower end of the air discharge pipe (8a) is enclosed by the inner cylinder (10a) whose upper end is located near the ceiling of the air chamber to create a reverse siphon. is forming. The other air chamber section (7b) has an equal structure. (Hereinafter, each part that is equivalent will be distinguished by changing the symbol made of lowercase letters, and redundant explanation will be omitted.) A common header part (11) is placed near both air chambers (7a) and (7b), for example. It is attached to the holding frame (3) and receives pressurized air from an air source outside the ground (not shown) via a common hose α, and from the header part 0υ to each air chamber part (7a). Flexible air supply hoses (13a) and (13b) are individually connected to (7b).

In this embodiment, when both the air chambers (7a) and (7b) are in the lowered position, air is evenly supplied from the header part Ql) to both the air chambers (7a) and (7b); If that air chamber, for example (7a), rises first because it has a large amount of stored air ψ, the outlet of the air supply hose (13a) to this air chamber will be connected to the air supply hose of another air chamber (7b). (13b) Since the position is higher than the outlet, air from the header 00 is preferentially supplied to the floating air chamber (7a), so almost no air is supplied to the other air chambers (7b). (In this way, when the water level in the floating air chamber (7a) falls to the lower end of the air discharge pipe (8a), a reverse siphon effect occurs and the air stored in the air chamber (7a) is transferred to the pumping tube part (2a). ) is released all at once into a mass of air bubbles (C)
The water rises inside the water pumping cylinder (2a), and by its piston action, external water is sucked from the water intake port (14a) and pumped up, and then the air bubble mass (C) is released from the upper end of the water pumping cylinder (2a). The bubbles gradually split into large and small bubbles from a donut shape in the water body (a) and rise towards the water surface within an angle range of approximately 17°, entraining the surrounding water along the way. Arrow (d) indicates entrained flow.

The air chamber (7a) that has released air loses its buoyancy and sinks. Until the air chamber (7a) starts rising, releases air, and finishes settling, almost no air is distributed to the other air chambers (7b), so the floating of the air chamber (7b) is suppressed. has been done. After that, due to the settling of the air chamber (7a), the air from the header 〇〇 returns to both air chambers (7a).
(7b), the air chamber (7b) with the largest amount of stored air floats next and releases air in the same manner as described above. Repeat this operation alternately. As mentioned above, the time interval between air release and intermittent pumping from one pumping cylinder section is relatively short, about 5 to 10 seconds, so even if the capacity of the air chamber section (3a) (3b), the air supply hose (1
Even if there is a slight difference in the normal supply air amount via 3a) (13b), the air chambers (2a) and (2b) will rise alternately at regular intervals, and the air chambers will rise at approximately equal intervals. The reverse siphon begins to operate after a time difference of The pumping effect is effectively exerted without interference between the pumping cylinder parts.

In the present invention, it is possible to pump water at equal intervals and at different times even if there are three or more water pumping cylinder parts. FIG. 3 shows an embodiment in which three pumping cylinder sections are shown in parallel.

That is, the three pumping cylinder parts a) (2b) (2c)
The air chambers (7a), (7b), and (7c) corresponding to the respective air chambers are connected to a common header (114) by individual air supply hoses (13a, 13b, and 13c), respectively. First, when the air chamber (2a) floats up, the air supply hose (
Since the outlet position of the air chamber (13a) is higher, the air chamber (2a)
) increases the amount of air supplied to other air chambers (2b) (2c
) decreases. When the air chamber (2a) releases air and sinks, the air chamber (2b) or (2c) with a larger amount of stored air, for example (2b), rises next and releases air. do. Then, the air chamber section (2c) floats up and releases air. After that, the air chambers (2a), (2b), and (2c) with the largest amount of air storage are floated in that order, and air is repeatedly released intermittently, and the three water pumping cylinders (2a) (2b)
) From (2c) onwards, intermittent water pumping will be repeated at approximately equal time intervals.

The arrangement of the multiple pump cylinders can be freely chosen in relation to the common header. For example, as shown in Fig. 4, the air chamber (7a) (
7b) (7c) (7d) may be arranged on the same circumference, and if there are many pumping cylinders, multiple pumping cylinders may be arranged on both sides of the header (IIC) as shown in Figure 5. Part (2
) can be arranged in two columns.

If the number of water pumping cylinders is increased, the time intervals of staggered water pumping will become more even, but it is easily understood that there is no need to increase the number in practice.

(Effects of the Invention) According to the intermittent air pumping cylinder device of the present invention, air bubbles are regularly released from the upper ends of the plurality of intermittent air pumping cylinders installed at the same height at substantially equal time intervals. become,
The flow of small bubbles rising away from the pumping tube becomes more continuous and generates a larger amount of entrainment flow, which increases the pumping circulation volume of the intermittent air pumping tube device, reducing the number of installations in the water area and increasing the capacity. It has the effect of operating stably and achieving high pumping water circulation efficiency even when

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional side view of an embodiment of the simplest two-pumping cylinder section to show the principle structure of the intermittent air pumping cylinder device of the present invention, and Fig. 2 is a longitudinal side view showing the installation situation and operating situation in the water area. FIG. 3 is a vertical cross-sectional side view of another embodiment of the present invention showing three pumping cylinders arranged side by side, and FIG. 4 is a plan view showing an example of the arrangement of another embodiment of multiple pumping cylinders. FIG. 5 is a plan view showing the other side of the arrangement. (i)...Intermittent air pumping cylinder device, (2a) (2b)
(2c)... Lifting cylinder part, (3)... Holding frame, (4
)...Anchor, (5)...Wire, +61 ・
...Float, (7) (7a) (7b) (7c)
(7d) - Air chamber, (8a) (8b) (8c
) = Air discharge pipe, (9a) (9b) (9c) - Guide cylinder, (10a) (10b) (10c) ... Inner cylinder, αυ (118') (IIB) (IIC) ... Header , (b)...Common hose, Q hot water (13a) (
13b) (13c) (13d) - Air supply hose, (1
4a) (14b) (14C)-Water inlet, (a)-・
・Water area, (b) ... water bottom, (C) ... bubble mass, (
dl...Long style.

Claims (1)

[Claims] A plurality of water pumping cylinders are placed side by side on a common holding frame at intervals, and these are moored to underwater anchors so that each water pumping cylinder is held upright at the same height within the body of water using a float. At the same time, an air chamber incorporating a reverse siphon starting part is provided in the holding frame so as to be movable up and down, corresponding to each pumping cylinder part, and a flexible air supply is provided from a common header part that receives air from an external air source. A large-capacity intermittent air pumping cylinder device characterized in that a hose is individually connected to each air chamber to distribute and supply air to each air chamber.