JPH0312400Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is a two-stage design for the purpose of separately convective stirring and aeration of the upper and lower parts of dams, lakes, etc. with large water depths. This relates to water pumps.

(Prior Art) This type of two-stage water pump was previously proposed by the applicant (Japanese Patent Application No. 170951/1983 or Utility Application No. 170951/1983).
124874), the former does not reuse the air used in the lower pumping tube in the upper pumping tube, so the latter is an improvement on this.

(Problems to be Solved by Invention) In the conventional device, Utility Application No. 124874/1985, the air bubbles rising inside the lower cylinder tend to be insufficiently pulverized, and the amount of air is insufficient to improve the oxygen deficiency. There was a problem with the shortage.

(Means for Solving the Problems) However, in this invention, an air supply device is provided in the lower cylinder, thereby replenishing insufficient oxygen and solving the above-mentioned conventional problems. Furthermore, this invention further improves the practicality of the above-mentioned Utility Application No. 124874/1985 by making the bubble crusher more efficient and making the upper cylinder larger in diameter than the lower cylinder. .

That is, this invention includes a device for separating the air rising in the lower cylinder from the upper part of the lower cylinder, which has an air chamber for intermittent supply of air in the lower part and a built-in bubble crusher in the upper part; A two-stage structure comprising an air chamber that collects air and re-supplies it intermittently, an upper cylinder having a float on the upper part connected vertically, and an air supply device provided at the bottom of the lower cylinder. It is a water pump. Further, the bubble crushing device has stirring blades and protrusions fixed to the inner wall of the cylinder. Next, the device for separating air is constructed by stacking a plurality of truncated cones at predetermined intervals. Furthermore, the upper cylinder has the same diameter or a larger diameter than the lower cylinder. Further, the air replenishing device has a large number of air holes provided in the peripheral wall of a cylindrical body, and a diffuser tube surrounding the air holes on the outside thereof.

The crushing device generates a vortex in the water flow using guide vanes, for example, and causes the water and air to collide during the flow to crush it, and because of the crushing action by the stationary blades, it can be operated continuously for long periods of time. There is no risk of malfunction. Also, by providing protrusions on the cylinder wall,
The pulverizing effect can be further improved by locally causing rapid fluctuations in flow velocity.

Note that the air bubbles crushed in the lower cylinder are mixed into the water to supply as much oxygen as possible to the water in the lower layer. Since this water convects independently within the lower layer (the upper and lower layers are separated primarily by temperature differences),
There is no risk of the low temperature lower layer water mixing with the higher temperature upper layer water. In addition, lower layer water is prone to oxygen deficiency, but upper layer water generally has a higher amount of dissolved oxygen because it receives oxygen supply from the water surface. Therefore, it is necessary to consider oxygen supplementation for the lower layer water as much as possible, but for the upper layer water, the necessary oxygen supply is achieved by mixing the water relatively close to the water surface and the water slightly farther from the water surface by convection. The amount of dissolved oxygen can be obtained.

(Function) This device has an air chamber for intermittent air supply in the upper cylinder and the lower cylinder, so air bubbles rise intermittently within each cylinder, and air bubbles intermittently rise inside each cylinder. The water below each cylinder rises, but the rising speed of the water fluctuates. Furthermore, since the air supply device is provided at the bottom of the lower cylinder, the oxygen in this air is dissolved, so that the water discharged from above the lower cylinder has a higher amount of dissolved oxygen than the inhaled water.

(Embodiment) An embodiment of this invention will be described below with reference to the accompanying drawings.

An air chamber 2 is attached and fixed to the lower part of a cylinder 1 made of glass fiber reinforced plastic, a diffuser pipe 3 is fixed around the lower end, and a crushing device 4 having a slightly larger diameter than the cylinder 1 is connected to the upper part to form a lower cylinder. Configure A. In addition, a separation device 6 is connected to the lower end of a cylinder 5 made of the same material as the cylinder 1, and an air chamber 7 is attached to the outer circumference of the upper cylinder.
A float 8 is attached to the outer periphery of the upper end to constitute an upper cylinder B. The upper cylinder B is vertically connected to the upper part of the lower cylinder A to constitute a two-stage water pump of this invention. The air chamber 2 is formed by loosely fitting intermediate cylinders 10 and 11 one after another while keeping a predetermined gap to the outside of a cylinder 9 (same quality and the same diameter as the cylinder 1), and forming an outer cylinder by keeping a predetermined gap to the outside of the intermediate cylinder 11. 12 loosely fit into the upper part of the cylinder 9 and the upper and lower parts of the intermediate cylinders 10 and 11 through the ventilation holes 13, 14, 15.
The lower end of the outer cylinder 12 and the intermediate cylinder 11 are respectively bored.
An annular gap 16 is opened between the lower end and the lower end (FIG. 3). In the embodiment described above, FIG. 1 shows that the upper and lower cylindrical bodies have approximately the same diameter, and FIG. 2 shows that the upper cylindrical body has a larger diameter. Since the installation depths of the upper and lower cylinders are different, if you use the same amount of air (even if some of it dissolves in the water and becomes smaller)
Since the volume of air rising inside the upper cylinder increases in proportion to the water depth, it is more rational to take this into account and increase the diameter of the upper cylinder. In particular, in relation to the volume of the air chamber in the upper cylinder, when air comes out continuously, the convection force by the upper cylinder becomes weaker, so the diameter of the upper cylinder is reduced by the rise of the air mass rising inside it. It shall be sized appropriately for the spacing and volume of the air mass.

When pressurized air is supplied from the air pipe 17 in the direction indicated by the arrow 18 (in FIG. 3) in the above-mentioned implementation device, the air accumulates between the intermediate cylinders 10, 11 and the outer cylinder 12, and the water level in the air chamber is gradually increased. lower. Thus, when the water level reaches the position indicated by the chain line 19 in Figure 3,
The air accumulated in the air chamber 2 is discharged through the ventilation holes 13, 14,
15 flows as indicated by arrows 21, 22, 23, 24, and 25, is discharged as a group into the cylinder 9 (by the siphon), and rises as an air mass 20.
As this air mass 20 rises, the lower cylinder 1
Water flows in from the lower end as shown by arrow 26. The air mass 20 rises as described above, and the crushing device 24
When water and air enter the water, the direction is rapidly changed by the stirring blade 27 (arrow 8), and the flow velocity is also changed by the protrusion 29, making the air fine and mixing with the water, so that the oxygen in the air is Elutes into water. The mixture of air particles and water thus generated rises as shown by arrow 30 in FIG. Show 3
3, it rises between the outer cylinder 34 and the intermediate cylinder 35 and accumulates in the air chamber 7. The air bubbles that have risen in this way accumulate in the gaps between the intermediate cylinders 35, 36 and the outer cylinder 34, and gradually lower the water level in the air chamber 7. When this water level reaches the position indicated by the chain line 37 in Fig. 4, the air chamber 7
The air inside the cylinder 5 is discharged to the inside of the cylinder 31 through the ventilation gap 38 and the ventilation holes 39 and 40, and becomes an air mass 41 and rises inside the cylinder 5. Therefore, as the air mass 41 rises, water is sucked in from the water suction pipe 42 as shown by the arrow 43, and the water and air mass rise within the cylinder 5 as shown by the arrow 44, and from the upper end as shown by the arrow 45. It is discharged like this. Therefore, water is sucked in through the suction pipe 42 and discharged from the upper end of the cylinder, so that vertical convection occurs around the cylinder 5, and the upper layer water is stirred by the upper cylinder. Since the rise of the air mass in the above is necessarily intermittent, the flow velocity of the water discharged from the upper end of the upper cylinder also changes intermittently. For example, water can be separated into water with a strong force and outflow due to its penetrating force, so in the case of water with a strong force, the water near the upper end of the upper cylinder is separated, but in the case of outflow due to a penetrating force, there is almost no force to separate it. As a result, the water near the upper cylinder is returned again as shown by arrows 46 and 46, and the rising water eventually mixes with the nearby water, and the temperature of the mixed water is lower than the water temperature near the lower end of the upper cylinder. It gets expensive. For example, if the water temperature near the top end of the upper cylinder is 25°C and the water near the bottom end is 17°C, the mixed water will be about 23°C. Therefore, the difference in specific gravity due to the difference in water temperature is reduced, and the water spreads horizontally near the water surface without descending near the upper cylinder and gradually descends, so the range of convective circulation becomes significantly wider. Note that guide plates 47 and 4 are provided at the lower end of the lower cylinder A (lower part of the separation device) and on the outside of the air chamber 7.
8 is provided, which rises from the lower cylinder A and guides the bubble-separated water to diffuse in a direction perpendicular to the cylinder 1. This water is mixed with relatively high-temperature water at the top of the cylinder, which is cold at the bottom, and has an intermediate temperature (for example, if the bottom of the water is 7°C and the top of the cylinder is 13°C, the mixed water is 11°C).
℃), so the specific gravity does not drop immediately, but gradually decreases.However, since the initial water discharged from the cylinder 1 is not sufficiently mixed, it is kept on the guide plate until it is mixed to a certain extent. It is desirable to provide guidance.
In addition, if it is determined that the air supplied from the air chamber 2 of the lower cylinder is insufficient for the required amount of air (therefore, the amount of oxygen supplied), the hose 49 is connected to the diffuser pipe as shown by the arrow 50. A large amount of air can be replenished by supplying pressurized air to the air diffuser 3 and ejecting fine air from the air diffuser 3 through the pores 51 in the direction of the arrow.

(Effect of the invention) That is, according to this invention, a lower cylinder having an air chamber and a crushing device, and an upper cylinder having a separating device and an air chamber are vertically connected, and the powder is supplied to the lower cylinder. Using air, water is intermittently raised into the lower cylinder and upper cylinder to generate vertical convection outside each cylinder, and the air particles rising inside the lower cylinder are pulverized and pulverized. It has the effect of efficiently dissolving the absorbed oxygen and increasing the amount of dissolved oxygen in the lower water.

In addition, if the bubbles pass through a bubble crusher using stirring blades and protrusions, the bubbles will become even finer.
Since the air supply device is provided at the bottom of the lower cylinder, the water rising up the lower cylinder has the effect of dissolving oxygen in the air and increasing the amount of dissolved oxygen.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of an embodiment of this invention, and Fig. 2 is a partially omitted and partially cutaway front view of an embodiment in which the upper cylinder has a larger diameter than the lower cylinder. Figure 3 is an enlarged sectional view of the lower air chamber,
FIG. 4 is an enlarged cross-sectional view of the upper air chamber. 1, 5...Cylinder, 2,7...Air chamber, 3...Diffuser pipe, 4...Crushing device, 6...Separation device, A...
Lower cylindrical body, B...upper cylindrical body.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. To the upper part of the lower cylindrical body, which has an air chamber for intermittent supply of air in the lower part and a built-in bubble crusher in the upper part,
The lower part is equipped with a device for separating the air rising inside the lower cylinder, and an air chamber that collects the air and supplies it again intermittently, and the upper cylinder has a float at the upper part and is connected vertically. and a two-stage water pump comprising an air supply device provided at the bottom of the lower cylinder. 2. The two-stage water pump according to claim 1, wherein the bubble crushing device is a stirring blade and a protrusion fixed to the inner wall of the cylinder. 3. The air separating device is a two-stage water pump according to claim 1, which is a utility model registration, and includes a plurality of truncated cones layered at predetermined intervals. 4. The two-stage water pump as set forth in claim 1 of the utility model registration claim, in which the upper cylinder has the same diameter or a larger diameter than the lower cylinder. 5. The air replenishing device is a two-stage water pump according to claim 1, which is a utility model, in which a large number of air holes are provided in the peripheral wall of the cylinder, and a diffuser pipe is surrounded on the outside thereof.