JPH08200300A - Air mixing type water flow generating device - Google Patents

Abstract

PURPOSE: To provide an air mixing type water flow generating device whereby a bubble is collected in the center part of a water flow, to prevent early floating the bubble, and to make it arrive at a distant part, so as to effectively perform purifying a water quality. CONSTITUTION: Relating to an air mixing type water flow generating device, the device is formed by providing an underwater cylindrical waterway part 5 of delivering a water flow generated in the inside toward a prescribed direction, water jet pump mounted in an outer cylinder to accelerate a water liquid in the outer cylinder by a drive fluid supplied from the outside to generate the water flow and a gas suction pipe 7a and gas suction port 7b of sucking gas in addition to the drive fluid from the outside to this water jet pump. Accordingly, a water jet 1 of the water jet pump is obliquely arranged to tilt in a circumferential direction relating to a cross section of the waterway part 5. A plurality of fixed swirlers 4, coaxially fitted to a waterway in the downstream of this water jet pump to tilt against a flow, are radially arranged. A single or a plurality of helical recessed grooves are hollowly provided with an equal space in a waterway wall internal surface in the downstream of this water jet pump.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an aerated water flow applied to water mass exchange, flow promotion, etc. for water quality purification in closed water areas such as lakes, ponds, water tanks, pools, harbors, aquaculture sites. Regarding the generator.

[0002]

2. Description of the Related Art As a conventional water flow generator, Japanese Patent Laid-Open No. 5-340400, which was previously filed by the present applicant, is known. This type of water flow generator is used for water mass exchange, water flow promotion, etc. for water quality purification in a closed water area. As shown in FIGS. The outer cylinder 18 is a cylindrical body (nacelle) installed inside the outer cylinder 02 with their central axes aligned. As shown in the figure, a water jet pump (eductor) 19 for generating a water flow in a jet type is installed inside the cylindrical body 18, and a driving fluid (air, water or a gas-liquid mixed fluid of these water jet pump 19) ) Is supplied through the supply pipe 03. As a result, the water jet pump 19 sucks the water in the outer cylinder 02 from the inlet 21 and discharges the water from the outlet 20, so that the outer cylinder 0
The water in 2 is accelerated in the discharge direction. 03
a is an outlet of a jet stream of a driving fluid for generating a water stream, 0
Reference numeral 8 is a mooring line, 09 is a sinker, 10 is a buoyant member that is circumferentially fixed along the outer circumference of the front and rear ends of the outer cylinder 02, 22 is a column that coaxially supports the cylinder 18 to the outer cylinder 02, 26, Reference numeral 27 is an upstream end and a downstream end of the outer cylinder 02, 28 is an eye plate used for mooring the outer cylinder 02, and 44 is a dust guard. By applying the characteristics of the water jet pump 19, such a water flow generating device does not use a large-scale drive device such as a prime mover, has no moving parts, and thus has a simple structure that is maintenance-free and has high durability. It is possible to generate a powerful and effective water flow in any direction such as up, down, left and right, diagonally from 02, and if necessary, a water jet pump 19
By using or mixing a gas as the driving fluid, the effective aeration effect can be obtained without adding an aeration device. At that time, the water flow generated in the outer cylinder 02 does not intermittently collide with the water surface to cause a flow loss, and since it is a calm and steady water flow, adverse effects on aquatic organisms are significantly reduced. In addition, this water flow generator is an outer cylinder 0
2. Since it is possible to form a complex group of underwater structures consisting of mooring lines 08, sinkers 09, etc., it can exert the effect as a fish reef, and as an exchange device for seawater mass, it is indirect to aquatic products. Has protective and habitat functions. Further, in practice, water having a high dissolved oxygen concentration in the surface layer is generally used as a driving fluid for the water jet pump 19, which is effective when supplying a water flow to a poor oxygen water mass region such as the bottom layer. Aeration effect can be expected.

A water flow generator as shown in the side view of FIG. 7 is also known, which is installed in the vicinity of a cage or aquaculture shelf, and is used for water mass exchange and flow promotion in aquaculture water areas. There is. In the figure, 31 is a float for hanging an aquarium or aquaculture shelf, 32 is a fish basket, 3
3 is a shellfish culture shelf.

The water flow generator shown in FIG. 8 is installed at the bottom of the water in the bay, and is used for water mass exchange, flow promotion, etc. in highly closed water areas such as the interior of the bay. The mooring line 08 and the sinker 09 are respectively attached to both ends of the outer cylinder 02 in the longitudinal direction.
They are provided in groups, and when installed on the bottom of the water, the length of the mooring measure is adjusted so that they are arranged in a posture along the inclined surface of the bottom of the water.

The one shown in the plan view of FIG. 9 is also installed in the bay, 35 is pump equipment for delivering the driving fluid of the water jet pump for water flow generation, and 39 and 40 are generated in the bay by the present water flow generator. These are the inflow direction and the outflow direction of the flow. As a result, by arranging seawater that is stagnant in a closed bay, which is difficult to circulate by itself, in a combination of multiple units of this device, a circulating flow can be actively generated in the bay to perform water mass exchange. it can.

FIGS. 10 to 12 show a conventional air-mixing type water flow generator, which is used for water mass exchange also as aeration for water quality purification in a closed water area. Here, 03a is a driving water outlet nozzle for generating a water flow in the water jet pump 19, 29 is a gas suction pipe for sucking air from the outside when the internal pressure of the water jet pump 19 is below atmospheric pressure, and 30 is water. This is a ventilation pipe in the jet pump 19. By applying the characteristics of the water jet pump 19 as described above, the present water flow generation device does not use a large-scale drive device such as a prime mover and has a simple structure with no maintenance and high durability because it has no moving parts. Cylinder 0
2, a strong and effective water flow can be generated in any direction such as up, down, left and right, diagonally, and the water jet pump 19 is provided with a gas suction pipe 29 for sucking air from the outside without adding an aerator. The effective aeration effect can be mentioned. Further, the water flow generated in the outer cylinder 02 does not intermittently collide with the water surface to cause a flow loss, and is a calm and steady water flow, so that adverse effects on aquatic organisms are significantly reduced.

The water flow generator shown in FIG. 12 is also another conventional aeration-type water flow generator, which has substantially the same structure and effect as the water flow generator described above. A water passage member 29b, which is made of a porous material and forms a part of the inner wall of the water jet pump 19, is attached to the outlet of the ventilation pipe 30 in the water jet pump 19. A gas compression system 41 is provided. The air compressed or stored under atmospheric pressure by the gas compression system 41, or the gas for aeration with a specific gas is the gas suction pipe 29 and the ventilation pipe 3.
By passing through the inside of 0 and passing through the water channel member 29b, it becomes a fine bubble and is sent out to the water channel in the water jet pump 19.

[0008]

However, the water flow generator described above has the following problems. (1) Bubbles mixed in the water flow try to float due to their own buoyancy, but in a straight water flow there is no force to prevent this, so the bubbles float early after leaving the water flow generator. Bubbles do not reach far. (2) However, if the water flow is swirled, the centripetal force collects the bubbles in the center of the water flow, thereby preventing the bubbles from rising early and allowing the bubbles to reach a long distance, thereby spreading the water purification effect. It is considered.

The present invention has been proposed in view of the above circumstances, and air that collects air bubbles in the center of a water stream, prevents their early rising, and allows the air bubbles to reach a long distance to effectively purify water. An object is to provide a mixed water flow generator.

[0010]

To this end, the invention according to claim 1 provides an outer cylinder for discharging a water flow generated inside in a predetermined direction, and a drive which is mounted in the outer cylinder and is supplied from the outside. An aerated water flow provided with a water jet pump for accelerating the water liquid in the outer cylinder by a fluid to generate a water flow, and a gas suction pipe for sucking gas other than the driving fluid from the outside in the water jet pump. In the generator, the water jet outlet of the water jet pump is arranged obliquely in a circumferential direction with respect to the cross section of the water channel.

According to a second aspect of the present invention, an outer cylinder for discharging a water flow generated inside in a predetermined direction, and a water inside the outer cylinder by a driving fluid mounted in the outer cylinder and supplied from the outside. A water jet pump for an aeration-type water flow generator, comprising: a water jet pump for accelerating a liquid to generate a water flow; and a water suction pipe for sucking gas in addition to the driving fluid from the outside in the water jet pump. A plurality of swirl vanes that are coaxially fitted in the water channel downstream of and are inclined with respect to the flow are radially arranged.

According to the third aspect of the present invention, an outer cylinder for discharging a water flow generated inside in a predetermined direction, and a water inside the outer cylinder by a driving fluid mounted in the outer cylinder and supplied from the outside. A water jet pump for an aeration-type water flow generator, comprising: a water jet pump for accelerating a liquid to generate a water flow; and a water suction pipe for sucking gas in addition to the driving fluid from the outside in the water jet pump. Is characterized in that a single spiral groove or a plurality of spiral grooves are provided at equal intervals on the inner surface of the downstream water channel wall.

[0013]

According to such a configuration, the following operation is performed. (1) The swirl flow can be generated in the water flow in the water channel by inclining the ejection port in the swirling direction with respect to the cross section of the water channel. (2) A swirl flow can be generated in the water flow by the swirl vanes. (3) A spiral groove is formed in the waterway wall to generate a swirling flow.

[0014]

Embodiments of the present invention will now be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing the first embodiment, and FIG. 2 is II of FIG.
FIG. 3 is a vertical sectional view showing the second embodiment of the present invention, and FIG. 4 is a vertical sectional view showing the third embodiment of the present invention.

First, in the first embodiment shown in FIGS. 1 and 2, the jet port is installed so as to be inclined with respect to the cross section of the water channel portion 5 in the direction in which a swirl flow is generated. That is, the water ejection port 1 in FIG. 1 is provided so as to be inclined in the circumferential direction as shown in FIG. Here, 1 is a water jet, 2 is the direction of the water flow, and 3 is a bubble.

Next, in the second embodiment shown in FIG.
A fixed swirl vane 4 is provided in the water passage behind the water jet port 1 and the gas suction port 7 to create swirl flow.

Further, in the third embodiment shown in FIG. 4, a spiral groove 6 is provided in the water channel wall behind the water jet port 1 and the gas suction port 7 to create a swirling flow in the water channel.

[0018]

According to this structure, the centripetal force of the swirling flow causes the bubbles to be collected in the central portion of the water flow and reach a distant place without rising early. As a result, the effect of water purification can be expanded.

In short, according to the first aspect of the invention, the outer cylinder for discharging the water flow generated inside in a predetermined direction, and the outer cylinder by the drive fluid mounted in the outer cylinder and supplied from the outside. In an aeration-type water flow generator, which comprises a water jet pump for accelerating the water liquid in the inside to generate a water flow, and a water suction pipe for sucking a gas in addition to the driving fluid from the outside in the water jet pump, By arranging the water jet outlet of the water jet pump diagonally with respect to the cross-section of the waterway in a circumferential direction, air bubbles are collected in the center of the water flow and their early rising is prevented and the air bubbles reach a long distance. To obtain an aerated water flow generator that effectively purifies water.
The present invention is extremely useful in industry.

According to the second aspect of the present invention, the outer cylinder for discharging the water flow generated inside in a predetermined direction, and the driving fluid which is mounted in the outer cylinder and supplied from the outside, inside the outer cylinder. A water jet pump for accelerating the water liquid to generate a water flow and a gas suction pipe for sucking a gas in addition to the driving fluid from the outside in the water jet pump, By arranging a plurality of swirl vanes coaxially fitted in the water channel downstream of the jet pump and inclined with respect to the flow, air bubbles are collected in the center of the water flow and their early rising is prevented to prevent air bubbles. INDUSTRIAL APPLICABILITY The present invention is extremely useful industrially, since an aeration-type water flow generation device that effectively reaches the distance and purifies water is obtained.

According to the third aspect of the present invention, the outer cylinder for discharging the water flow generated inside in a predetermined direction, and the drive fluid which is mounted in the outer cylinder and is supplied from the outside in the outer cylinder. A water jet pump for accelerating the water liquid to generate a water flow and a gas suction pipe for sucking a gas in addition to the driving fluid from the outside in the water jet pump, By forming a single spiral groove or multiple spiral grooves at equal intervals on the inner surface of the waterway wall downstream of the jet pump, air bubbles are collected at the center of the water flow and their premature rising is prevented. The present invention is extremely useful industrially, since an aeration-type water flow generator that effectively purifies water by arriving at a long distance is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a water channel showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a vertical cross-sectional view of a water channel showing a second embodiment of the present invention.

FIG. 4 is a vertical sectional view of a water channel showing a third embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional water flow generator, and FIG. 5 (B) is a cross-sectional view taken along the line BB in FIG. 5 (A).

6 is an enlarged view of the water jet pump of FIG.

FIG. 7 is an overall side view showing an installation example of a conventional seabed-based water flow generation device.

FIG. 8 is a side view showing an installation example of a conventional seabed water flow generator different from that shown in FIG.

FIG. 9 is an overall plan view showing an installation example of a conventional water flow generator installed in a bay.

10A and 10B show a conventional aeration-type water flow generator, in which FIG. 10A is a vertical sectional view thereof, and FIG. 10B is a sectional view taken along the line BB in FIG.

11 is an enlarged view showing the water jet pump of FIG.

12 shows a conventional aeration-type water flow generator different from that shown in FIG. 11, and FIG. 12 (A) is a longitudinal sectional view thereof, and FIG.
[Fig. 6] is a same vertical sectional view showing a modified example of Fig. 1A.

[Explanation of symbols]

 1 Water Jet 2 Water Flow Direction 3 Bubbles 4 Swirler (Fixed Type) 5 Water Channel 6 Helical Groove 7 Gas Inlet

Claims (3)

[Claims] 1. An outer cylinder that discharges a water flow generated inside in a predetermined direction, and a driving fluid that is mounted in the outer cylinder and supplied from the outside to accelerate the water liquid in the outer cylinder. In an aeration-type water flow generation device comprising a water jet pump for generating a water flow and a gas suction pipe for sucking gas in addition to the driving fluid from the outside in the water jet pump, the water jet port of the water jet pump is An aerated water flow generator characterized in that it is obliquely arranged in a circumferential direction with respect to a cross section of a water channel. 2. An outer cylinder for discharging a water flow generated inside in a predetermined direction, and a drive fluid mounted in the outer cylinder and supplied from the outside to accelerate the water liquid in the outer cylinder. In an aeration-type water flow generation device comprising a water jet pump for generating a water flow and a gas suction pipe for sucking a gas in addition to the driving fluid from the outside in the water jet pump, a water channel downstream of the water jet pump is provided. An aerated water flow generator characterized in that a plurality of swirl vanes coaxially fitted and inclined with respect to the flow are radially arranged. 3. An outer cylinder that discharges a water flow generated inside in a predetermined direction, and a driving fluid that is mounted in the outer cylinder and supplied from the outside to accelerate the water liquid in the outer cylinder. In an aeration-type water flow generation device comprising a water jet pump for generating a water flow and a gas suction pipe for sucking gas in addition to the driving fluid from the outside in the water jet pump, a water channel wall downstream of the water jet pump An aerated water flow generator characterized in that a single spiral groove or a plurality of spiral grooves are provided on the inner surface at equal intervals.