JPH0240320Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention provides an air chamber for intermittent supply of air in each of the upper and lower cylinders, and also mixes microbubbles into the water in the lower cylinder to increase the amount of water in the air. This water pump is designed to increase the dissolved amount of oxygen as much as possible, and to separately stir the upper and lower parts of deep water in dams, lakes, etc. by convection.

(Prior Art and Problems to be Solved) The applicant previously developed a pumping tube in which upper and lower cylinders are vertically connected as a device for convectively stirring the upper and lower layers of a dam, lake, or pond with large water depth. However, in the invention of the earlier application (Japanese Patent Publication No. 1-26760), there is a device that separately supplies pressurized air to the air chambers of the upper and lower cylinders, or a pressurized air that is supplied to the air chamber of the lower cylinder. Since this is a device for distributing air, and the rising air of the pressurized air supplied to the lower cylinder is not used again in the upper cylinder, the amount of air is inevitably equivalent to two units, and the capacity is large. There was a problem that required a loud pump. However, in the method of stirring the upper and lower layers separately using upper and lower cylinders, it is necessary to provide the dissolved oxygen in the form of fine air bubbles in order to increase the amount of dissolved oxygen in the lower layer. When a micro bubble ejection device is attached, an upward flow can be obtained by the rise of the bubbles (Utility Model Publication No. 63-397), but the flow becomes a steady flow and a stirring effect appears, but it does not occur near the pumping tube. There were problems such as the ripple effect was small.

(Means for solving the problem) However, in this invention, upper and lower cylinders each having an air chamber are connected vertically, and an air diffuser is installed at the bottom of the lower cylinder to supply air bubbles, so that the lower layer water is In addition to providing a sufficient stirring effect and oxygen supply, all pumped water is made into an intermittent flow, which improves the ripple effect.
This solves the conventional problems mentioned above.

That is, this invention is based on a pumping cylinder in which an upper cylinder is connected to the upper part of the lower cylinder, which has an air chamber that generates air bubbles intermittently, through an upper air chamber that generates air bubbles intermittently. An air diffuser that generates small bubbles is provided inside the lower part of the body, and a lower air chamber for intermittent supply of air bubbles is provided in the middle part, and the lower end of the upper cylinder traps air bubbles that have risen inside the lower cylinder. An upper air chamber is provided in which the air can be collected and re-supplied as air bubbles intermittently, and a water intake port for the pumped water is provided below the upper and lower cylinders, and the connection portion of the upper and lower cylinders is provided with a water inlet for the pumped water of the lower cylinder. This is a two-stage water pump that is characterized by having a gap that allows water to be released laterally. In the above, the air diffuser is a combination of an air diffuser plate and an air supply pipe, or an air ejection pipe provided with a large number of through holes. Further, the lower air chamber is installed by fitting and fixing it to the outer circumferential portion of the lower cylindrical body. The collection of air bubbles below the upper cylinder body is performed at the funnel widening portion at the lower end of the upper air chamber, and air and water are separated.

(Function) In this invention, both the upper and lower cylinders have air chambers, and an air diffuser is provided below the lower cylinder, so that the pumped water rising inside the lower cylinder dissolves the oxygen in the bubbles.
Then, the air is separated from water and is supplied to an air chamber provided in the upper cylinder. This allows water in dams, etc. to be stirred by convection in the shallow and deep layers above and below, and
The amount of dissolved oxygen can be increased.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 3 of the accompanying drawings.

In Fig. 1, a lower air chamber 2 is attached and fixed to the outside of the center of a lower cylinder 1 made of synthetic resin, glass fiber, reinforced plastic (FRP), or stainless steel, and porous holes are scattered inside the lower part of the lower cylinder 1. The air plate 3 is installed, a water intake port 4 is opened above the air diffuser plate 3, and a weight 39 is fixed to the lower end. In the figure, 11 and 11a are air supply hoses. Next, the lower end of the upper cylinder 5 made of the same material as the lower cylinder 1 is firmly connected to the support plate 6 at the upper end of the lower cylinder 1 via a support 7. An inverted funnel-shaped bubble collection part 8 is provided at the lower end of the upper cylinder 5, an upper air chamber 9 for collecting rising air bubbles is provided above it, and a float 10 is fixed to the outside of the upper part of the upper cylinder 5. It is.

In the embodiment described above, when pressurized air is sent to the air chamber 2 through the air supply hose 11, the pressurized air flows into the air chamber 2.
The water gradually collects from the upper part of the air chamber 2 and lowers the water level inside the air chamber 2. The air chamber 2 is connected to the partition wall 1 as shown in FIG.
2 and 13 define an outer space 14, an intermediate space 15, and an inner space 16. When pressurized air is supplied to the outer space 14, the air passes through the communication hole 17 provided in the upper part of the partition wall 12 and accumulates from the upper part of the air chamber 2, thereby pushing down the water level in the air chamber 2.

When the water level reaches the communication hole 18 provided in the lower part of the partition wall 13, the air accumulated in the air chamber 2 becomes a group and rises through the inner space 16. It is discharged into the lower cylindrical body 1 through the communication groove 19. Since this communication groove 19 is widely provided in the peripheral wall of the lower cylinder 1, the pressurized air that enters the lower cylinder 1 immediately becomes a bubble mass 20 and rises (FIG. 1). The lower cylindrical body 1 is formed into a bubble mass 2
As 0 rises, the water below rises as shown by arrow 21. Along with this, the nearby water lower cylinder 1
The water is sucked in from the water inlet 4 as shown by the arrow 22 and rises inside the lower cylinder 1 as shown by the arrow 23. There is an air diffuser plate 3 inside the lower part of the lower cylinder 1, and the air supplied from the air supply hose 11a is supplied as fine bubbles 42 by the air diffuser plate 3. The contacting water dissolves oxygen in the bubbles while rising up the lower cylinder 1. When such oxygen-dissolved water rises as described above and rises through the center of the bubble collecting section 8 connected to the lower end of the upper cylinder 5, the partition plate 27 (third
(Fig.), a part of which passes through the through hole 28 and enters the upper air chamber 9, and the other part automatically moves along the reverse funnel-shaped guide walls 8a, 8b, 8c with less resistance. As it descends as shown in 24, the arrow 25
It spreads laterally like this. Further, air enters the upper air chamber 9 through the through hole 28 of the partition plate and accumulates below the top plate 29 one after another. When air starts to accumulate in this way, the water that has risen inside the lower cylinder 1 is blocked by the air and cannot enter the upper air chamber 9, so everything automatically goes into the reverse funnel shape as described above. It descends as shown by the arrow 24 along the guide walls 8a, 8b, 8c. In this case, the flow direction is guided by a support plate 6 provided in a wide-flange shape on the outer periphery of the upper end of the lower cylinder 1. The water that diffused and flowed in the horizontal direction as shown by the arrow 25 diffused the same portion of water temperature (water specific gravity) in the horizontal direction, and then descended as shown in the arrow 26 in Figure 1 and flowed at the bottom of the water. Thereafter, as shown by the arrow 22, the water is sucked in through the water intake port 4 at the lower end of the lower cylinder 1 and rises again within the cylinder as shown by the arrow 23. When the water pumped up by the water pumping tube 1 is released at its upper end, it mixes with nearby water, so the water temperature approaches the water temperature near the upper end of the water pumping tube 1, and usually spreads laterally as it is. It turns out.

On the other hand, the bubble mass 20 enters the upper air chamber 9 through the through hole 28, and the fine air bubbles mixed in the water are separated by the bubble collection section 8, and are separated through the through hole provided in the partition plate 27 at the lower end of the upper air chamber 9. 28 and rises to the upper air chamber 9.
The water enters the air chamber 9, collects on the underside of the top plate 29 (FIG. 3), and gradually pushes down the water level inside the air chamber 9.

When the water surface 30 in the air chamber 9 reaches the lower end of the communication pipe 31 in this way, the air accumulated in the air chamber 9 becomes a group of bubbles and moves inside the communication pipe 31 as shown by the arrow 33. It passes through and is discharged into the upper cylindrical body 5. The air bubbles that have entered the upper cylinder 5 become a bubble mass 32 as shown in FIG. 3, and rise within the upper cylinder 5 as indicated by an arrow 34. Therefore, the water in the vicinity is drained from the water hole 35 provided in the side wall of the upper cylinder 5 as shown by the arrow 3.
6, water around the lower part of the upper cylinder body 5 is sucked into the upper cylinder body 5, rises as shown by the arrow 34 together with the bubble mass 32, and flows from the upper end of the upper cylinder body 5 as shown by the arrow 37. It is released as shown in FIG. 1, and then descends as shown by arrow 38 (FIG. 1), resulting in vertical convection. As described above, fine bubbles are separated from the mixture of water and bubbles released from the lower cylinder body 1 in the bubble collecting section 8, and the separated bubbles enter the upper air chamber 9 and enter the upper air chamber 9. When the water level reaches the lower end of the communication pipe 31, it is released from the communication pipe 31 all at once and becomes a group of bubbles again. As described above, air is intermittently released from the communication pipe 31 at intervals when air accumulates in the upper air chamber 9, and forms the driving force for the upward water flow in the upper cylinder 5. By doing the above, the amount of oxygen in the air accumulated in the upper air chamber 9 is reduced (because it dissolves in the water in the lower cylinder), but since there is an intermittent upward force due to the buoyancy of the bubble mass 32, As mentioned above, on the outside of the upper cylinder 5, the first
Convection flows as shown by arrows 37, 38, and 36 in the figure are generated. Therefore, due to the stirring effect caused by the water with a large amount of dissolved oxygen near the water surface descending as shown by arrow 38, the amount of dissolved oxygen in the large amount of water stirred by the upper cylinder 5 is almost the same as that of the water near the water surface. , the purpose can be achieved.

In the above, although the temperature of the water discharged from the upper end of the upper cylinder 5 is slightly low, it mixes with the nearby water and there is almost no difference in water temperature. Once released, the water does not descend immediately, but is once dispersed laterally, resulting in wide-area agitation.

In the embodiment described above, the porous air diffuser plate 3 was used as the air diffuser, but as shown in FIG. You can also. In this case, water can be sucked in from the lower end of the lower cylinder, so the water intake port 4 becomes unnecessary.

(Effect of the invention) That is, according to this invention, the upper and lower cylinders are connected vertically, and the air supplied to the air chamber of the lower cylinder and the bubbles supplied by the air diffuser are also used in the upper cylinder. Therefore, the total amount of air to be fed is approximately 1/2 of the normal amount, and even if the amount is relatively small, it has the effect of allowing both cylinders to operate accurately. In addition, since an air diffuser is provided at the bottom to supply fine air bubbles into the lower cylinder, oxygen in the air can be dissolved as much as possible in the water passing through the lower cylinder, and the bubble collecting section at the lower end of the upper cylinder can dissolve the oxygen in the air as much as possible. This has the effect of smoothly separating water and air bubbles and making use of this separation.

As mentioned above, if the pumping tube of this invention is used, the water of a dam, lake, marsh, etc. can be divided into upper layer water (shallow layer) and lower layer water (deep layer) and aerated, respectively, and the low temperature water of the lower layer can be aerated. The purpose of increasing the amount of dissolved oxygen can be achieved by minimizing the change in water temperature without causing a risk of promoting a decrease in the temperature of the upper layer water.

Since the air used in the lower pumping tube is used in the upper pumping tube, running costs can be drastically reduced. In addition, the lack of oxygen in the lower part (deep layer) can be compensated for by air released from the diffuser pipe.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the embodiment of this invention, Fig. 2 is an enlarged sectional view of the lower air chamber in Fig. 1, and Fig. 3 is the upper part of Fig. 1. FIG. 4 is an enlarged cross-sectional view of the air chamber, FIG. 4 is a plan view of the air diffuser, and FIG. 5 is a plan view showing another embodiment of the air diffuser. DESCRIPTION OF SYMBOLS 1...Lower cylinder, 2...Lower air chamber, 3...Diffuser plate, 4...Water inlet, 5...Upper cylinder, 8...Bubble collection part, 9...Upper air chamber, 10... ...Float, 11...
...Air supply hose.

Claims (1)

[Claims for Utility Model Registration] 1. A water pumping tube in which an upper cylinder body is connected to the upper part of a lower cylinder body having an air chamber that generates air bubbles intermittently, via an upper air chamber that generates air bubbles intermittently. An air diffuser for generating small bubbles is provided inside the lower part of the lower cylinder, and a lower air chamber for intermittent supply of air bubbles is provided in the middle part, and the lower end of the upper cylinder is provided with a diffuser that generates small bubbles inside the lower cylinder. An upper air chamber is provided in which the air bubbles can be collected and re-supplied as intermittent air bubbles, and pumped water suction ports are provided below the upper and lower cylinders, and a lower part is provided at the connecting portion of the upper and lower cylinders. A two-stage water pumping cylinder characterized by having a gap that allows water pumped from the cylinder to be released laterally. 2. The two-stage water pumping tube according to claim 1, wherein the aeration device is a combination of an aeration plate and an air supply pipe, or an air ejection pipe provided with a large number of through holes. 3. The two-stage water pump according to claim 1, wherein the lower air chamber is installed by fitting and fixing it to the outer periphery of the lower cylindrical body. 4. The two-stage water pump as claimed in claim 1, in which air bubbles are collected in the lower part of the upper cylinder body by a funnel-shaped opening at the lower end of the upper air chamber.