JPH11197687A - Water stream generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water stream generator constituted so as to be capable of spreading the water streams driven by the screw propeller in a duck to flow out of the duct over a wide range by a simple means. SOLUTION: A large diameter idly rotating propeller 14 is provided so as to idly rotate upon the reception of water streams 11 generated accompanied by the operation of the propeller 1 in a duck in water to flow out of the water outlet part 3a of the duct 3 and, since the diameter of the idly rotating propeller 14 is set so as to be made larger than the outer diameter of the water stream outlet part 3a of the duck 3, water streams are generated over a wide range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water flow generator used for improving the environment of a water area, culturing fish and shellfish, and the like.

[0002]

2. Description of the Related Art As a conventional water flow generating device, there is one shown in FIG. 2 (longitudinal sectional view). In this device, a screw propeller 1 driven by a motor 6 is provided inside a horizontal duct 3 suspended from a barge 2 on a water surface by a column 8.
It is provided so as to be supported by the support base 7. A power supply 9 for the motor 6 is provided on the barge 2 on the water surface, and a power supply cable 10 from the power supply 9 extends so as to be connected to the motor 6.

In such a water flow generating device, the water flow from the screw propeller 1 generates a water flow 11 in a required water area, eliminating stagnation and promoting a natural purification action. In the conventional water flow generator shown in FIG. 2, an air compressor 12 mounted on the barge 2 on the water surface is used.
The air is supplied to the air ejection section 4 with the pore plate through the hose 5 so that the water flow containing the fine bubbles generated from the air ejection section 4 increases the dissolved oxygen amount in the water. It has become.

[0004]

In order to enhance the effect of purifying the water area, it is necessary to spread the water flow containing fine bubbles as widely as possible. However, in the conventional water flow generator as shown in FIG. It is necessary to increase the diameter of the screw propeller 1 or increase the water flow by rotating the propeller 1 at high speed. However, such means has the disadvantage that the size of the apparatus including the duct is increased and the motor output is increased. Therefore, the present invention
It is an object of the present invention to provide a water flow generating device which can be driven by a screw propeller in a duct to flow out of the duct over a wide range by simple means.

[0005]

In order to solve the above-mentioned problems, a water flow generator according to the present invention includes a screw propeller provided to generate a water flow in water, and a rotary drive mechanism for the propeller. A propeller that has a duct disposed so as to cover the screw propeller and to have the same central axis as the propeller, and that the idle propeller idles upon receiving a water flow flowing out from a water outlet of the duct; It is provided so as to have the same central axis as the propeller, and the diameter of the idler propeller is set to be larger than the outer diameter of the water outlet of the duct.

Further, the water flow generating device of the present invention has an air ejection portion provided with a fine hole plate provided to mix a large amount of fine bubbles into the water flow in the duct, and compresses the air ejection portion through an air supply pipe. It is equipped with an air compressor that sends air.

In the above-described water flow generating device of the present invention, as the water flow generated by the operation of the screw propeller in the duct flows out from the water flow outlet of the duct, the idle propeller is rotated by the water flow. Become.

[0008] Since the idle propeller has a diameter larger than the outer diameter of the water outlet of the duct,
The operation of the spinning propeller generates a water flow over a wide range, thereby purifying the water area and culturing fish and shellfish efficiently.

[0009] Further, if an air ejection portion with a pore plate capable of mixing a large amount of fine bubbles into the water flow in the duct is provided, the water flow generated over the wide range includes fine bubbles. This is expected to achieve more efficient water purification and aquaculture of fish and shellfish.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic longitudinal sectional view of a water flow generator according to an embodiment of the present invention.

Also in the case of the water flow generating device of the present embodiment, the screw propeller 1 driven by the motor 6 is placed inside the horizontal duct 3 suspended from the barge 2 on the water surface via the support 8.
Are provided so as to be supported by the support base 7.
A power supply 9 for the motor 6 is provided on the barge 2 on the water surface, and a power supply cable 10 from the power supply 9 extends so as to be connected to the motor 6.

Further, air is supplied from an air compressor 12 mounted on the barge 2 on the water surface to an air jetting section 4 provided with a duct 3 and opened in the duct 3 through a hose 5. The water flow including the microbubble group generated from the air ejection section 4 increases the dissolved oxygen amount in the water.

In this embodiment, the idler propeller idles in response to the water flow flowing out of the water outlet 3a of the duct 3.
A bearing 14 is provided so as to have the same center axis as the screw propeller 1, and a bearing for supporting the idler propeller 14.
Reference numeral 15 is disposed inside a casing 13 containing the motor 6. The diameter of the idle propeller 14 is set larger than the diameter of the screw propeller 1 and larger than the outer diameter of the water outlet 3 a of the duct 3.

In the above-described water flow generator of the present embodiment, as the water flow 11 generated by the operation of the screw propeller 1 in the duct 3 flows out of the water outlet 3a of the duct 3, the idle propeller 14 is driven by the water flow. Is driven.

Since the idle propeller 14 has a diameter larger than the outer diameter of the water outlet 3a of the duct 3,
Water flow over a wide range by operating the idle propeller 14
11a is produced, whereby the purification of the water area and the cultivation of fish and shellfish can be performed efficiently.

Further, since the air jet unit 14 with the pore plate is provided so that a large amount of fine bubbles can be mixed into the water flow in the duct 3, fine water bubbles are included in the water flow generated over the wide range described above. This enables more efficient purification of water areas and cultivation of fish and shellfish.

[0017]

As described in detail above, the following effects can be obtained according to the water flow generator of the present invention. (1) As the water flow generated by the operation of the screw propeller in the duct flows out from the water outlet of the duct, the free-flowing propeller is driven by the water flow, and the free-flowing propeller is driven by the water flow in the duct. Since it has a diameter larger than the outer diameter of the outlet portion, the operation of the idle propeller causes a water flow over a wide range. In this way, by a simple means of providing a large-diameter idler propeller, purification of a water area, cultivation of fish and shellfish, and the like can be efficiently performed. (2) If the air jet with a pore plate that can mix a large amount of fine bubbles into the water flow in the duct is provided, the water flow generated over the wide range includes fine bubbles, More efficient purification of water areas and aquaculture of fish and shellfish are expected.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view schematically showing a water flow generating device as one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view schematically showing a conventional water flow generating device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 screw propeller 2 barge 3 duct 3 a water outlet 4 air outlet with perforated plate 5 hose 6 motor 7 support base 8 column 9 power supply 10 power supply cable 11, 11a water flow 12 air compressor 13 casing 14 idle propeller 15 bearing

Claims (2)

[Claims] 1. A screw propeller provided to generate a water flow in water and a rotation drive mechanism of the propeller, and arranged so as to cover the screw propeller and have the same central axis as the propeller. Provided with a duct provided, idler propeller that idles upon receiving a water flow flowing out from the water outlet of the duct is provided so as to have the same central axis as the screw propeller,
A water flow generating device, wherein the diameter of the idle propeller is set to be larger than the outer diameter of a water outlet of the duct. 2. The water flow generating device according to claim 1, wherein an air ejection portion with a pore plate is provided to mix a large amount of fine bubbles into the water flow in the duct, and an air supply pipe to the air ejection portion. A water flow generator, comprising: an air compressor that sends compressed air through the air compressor.