JP2018174771A - Water environment improving apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water environment improving apparatus having a simple configuration and capable of improving water environment by suppressing growth of blue-green algae and water plants growing at stagnant places in a river and the like.SOLUTION: A water environment improving apparatus 1 is used, with it disposed at a water-plant (wp) growing water area, generates a turbulent flow towards the water plants wp, stresses the water plants wp, and suppresses the growth of the water plants wp to improve the water environment. The water environment improving apparatus includes: self-induced vibration bodies 10 that vibrate by themselves by jet of fluid (water) supplied from the outside and generate the turbulent flow; and vibration-body holding members 11 and 11 that hold the self-induced vibration bodies 10. Holding member installation means 13 for installing the vibration-body holding members 11 and 11 in the water-plant growing water area are connected to the vibration-body holding members 11 and 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for improving the water environment, and more specifically, by controlling phytoplankton including blue-green algae in which cyanobacteria form colonies, and growing aquatic plants growing in stagnant places such as rivers, the water environment can be reduced. The present invention relates to a water environment improvement device to be improved.

In recent years, in rivers, lakes, etc., abnormal growth of aquatic plants such as E. coli, Ebiimo, E. coli, water lettuce and water hyacinth has become a serious social problem. In particular, water lettuce and the like have very strong growth potential and cover the entire surface in a short time.
Therefore, the sunlight does not reach the water, and the photosynthesis by the underwater plants is not performed, so the oxygen concentration in the water is significantly reduced, the underwater plants die and the water quality is deteriorated, and aquatic organisms such as fish can not inhabit It is an environment.

  A wide variety of techniques and methods have been developed as removal measures for the above-mentioned various aquatic plants including phytoplankton such as algal bloom.

For example, there is known a water flow generating / stirring apparatus that inactivates water-bloom, which is also phytoplankton, by the water pressure of the water flow including turbulent flow (see, for example, Patent Document 1).
In the water flow generating and stirring apparatus disclosed in this patent document 1, the water pressure is about 0.1 Mpa in gauge pressure of pseudo vacuoles which the blue algae have in the cells, which is the cause of the green algae covering the water surface by giving a water depth difference. It is configured to reduce the buoyancy of pseudo vacuoles, which are small bubbles of air, and to make it difficult for the blue algae to resurface as it is.
In addition, it is a technology that releases algal bloom etc. to low-level water whose water temperature is lower by about 5 ° C. or more than the surface layer by giving a depth difference and inactivates and inactivates phytoplankton such as algal bloom.

Furthermore, a water-bloom control method is also known that uses a vibration wave to prevent or reduce the occurrence of water-bloom (see, for example, Patent Document 2).
In this water-bloom control method, in summer, the vibration generator installed in the lake and the oxygen generator are operated in combination to suppress the elution of nutrients from the bottom of the lake to prevent or reduce the occurrence of water-bloom. In U.S. Pat. No. 6,095,095, there is disclosed a technique of operating only a vibration generator to elute and recover nutrients from the bottom of a lake.

By the way, many aquatic plants growing in the stagnation of a river are the growth environment which will be washed away when the flow becomes strong. Therefore, when the flow changes suddenly, the growth environment changes, which causes great stress for aquatic plants.
Stress is said to be a great enemy for all living things, not just plants such as aquatic plants. Conversely, by giving stress to aquatic plants, it is possible to change the growth condition of the aquatic plants, and it is also possible to suppress the growth of aquatic plants.

It is possible to artificially generate turbulent flow if it is intended to cause the stagnation of rivers to flow.
And the turbulent flow generation apparatus 100 described in the nonpatent literature 1 as what makes a turbulent flow generate | occur | produce artificially is mentioned. This turbulent flow generation device 100 is configured as shown in FIG. 16. In an experiment using this turbulent flow generation device 100, the difference in turbulent flow strength is the physiological characteristics of the submerged plant and the growth as a result thereof The purpose is to clarify the influence on the characteristics and to enable effective control by the structure.

The contents of the experiment will be described.
First, as submerged plants used in the experiment, five types of submerged plants such as Acacia japonicus, A. peony, Ebi-mo and A. pachyra were cultured for a predetermined period in a tank provided with a vibrating grid, and the growth rate, chlorophyll concentration, plant hormone, oxidizing enzyme The activity etc. were measured, and the result was further compared with the result of the field survey.

As shown in FIG. 16, the turbulent flow generator 100 used a water tank 110 having a size of 15.7 cm × 15.7 cm × 24.5 cm.
In the water tank 110, the soil 111 was laid with a thickness of 4 cm and filled with water to a depth of 3 cm from the upper edge to grow a target plant (waterweed) wp.

With regard to the generation of the turbulent flow, the vibrating grid 101 was used because it is highly isotropic, and the grid turbulent flow generated by moving the vibrating grid 101 up and down was used.
The vibrating grid 101 is configured of a grid (grid) at 2.5 cm intervals.
Driving of the vibration grid 101 is performed, for example, by driving the slider crank 102 by the drive device 105, which is connected to the swinging slider crank 102.

Next, the results of experiments conducted using the above-described apparatus and in accordance with the above contents will be described based on Non-Patent Document 1.
According to it, with respect to each of the above water plants wp, the growth amount clearly decreased with the increase of the turbulence intensity.

The following may be considered as the cause.
First, with respect to species whose growth amount has decreased, the chlorophyll concentration decreases with turbulent flow intensity, and it is considered that the amount of photosynthesis is suppressed.
In addition, the turbulent flow intensity by the vibration grid 101 is weaker as the depth is deeper.

The IAA (indole acetic acid) concentration decreased with increasing turbulence intensity for species with reduced growth.
The reason for this is that, since the activities of IAAO and POD, which are oxidizing enzymes, are increasing, it is considered that the increase in turbulent stress increases the activity of oxidizing enzymes and the degradation of IAA. As a result, it is considered that the amount of elongation, which is the function of IAA, is reduced, and the percentage of stems and stems is reduced as compared to the root biomass.

Patent 4420452 Patent 5360550 gazette A paper on river improvement fund support project “To understand the influence of flow velocity fields on the arrangement characteristics of submerged plants for the purpose of regeneration of submerged plant communities, to understand the flow control using structures, and to create guidelines for community regeneration; Graduate School of Science; Takashi Asaeda; Grant No .: 23-1215-008

In the water flow generating and stirring device disclosed in the above-mentioned Patent Document 1, large amounts of water bloom are suppressed by sucking and discharging the water bloom on the surface layer to the lower layer, but, for example, It does not try to suppress the growth of growing aquatic plants.
However, if it is possible to apply the discharge jet discharged from the water flow generation mixer used in the water flow generation and agitation device to the waterweed, there is a possibility that the waterweed can be stressed to suppress its growth.
However, in the above water flow generating and stirring device, the green algae is sucked from the suction port of the suction hose and discharged into the lower layer water, but the water depth difference is 10 m to make the water temperature lower by about 5 ° C. or more than the surface layer. The degree is necessary. Moreover, since the discharge jet flow passes through the inside of the flow straightening cylinder, the range of the discharge jet flow is limited.
On the other hand, since the stagnation of rivers where aquatic plants are growing is near the shore, the depth of water in general rivers is not so deep.
Therefore, the water flow generating and stirring device disclosed in Patent Document 1 can not be used.

Furthermore, in the water-bloom control method disclosed in Patent Document 2 above, the water-bloom control device includes a boat-like base provided with a float, a base portion provided on the boat-like base, a plurality of stirring blades, a stirring cylinder, The construction is provided with an oxygen generator, an underwater motor and the like, and the construction is complicated.
Moreover, as mentioned above, in the summer, the above-mentioned method for controlling blue-green algae is operated in combination with a vibration generator installed in the lake and an oxygen generator to suppress elution of nutrient salts from the bottom of the lake and generate blue-green algae. In winter, only the vibration generator is operated to elute and recover nutrients from the bottom of the lake. Therefore, in the water-bloom control method of Patent Document 2, there is no technical idea to stress the aquatic plants by applying turbulence to thereby suppress the growth of the aquatic plants.

  Moreover, in the lattice vibration type turbulent flow generation apparatus 100 used in the above experiment, although it is possible to generate turbulent flow, the scale is small because it is only for laboratory use, and fields such as stagnant places of rivers etc. The following problems arise when it is installed and implemented.

That is, of course in rivers, ponds and lakes, maintenance of waterproofing of driving devices and lubrication of bearings etc. and in the case of using electric motors, water countermeasures against power feeding are required, and the configuration of the device is complicated. The cost is high.
Also, according to the experimental results, the turbulence intensity is weaker as the water depth is deeper. On the other hand, in the field, unlike the water tank, the target water area is wide, and the water depth is deep, and in order to allow the turbulence intensity to reach deep, the grid structure needs to be enlarged. Needs to secure strength.
Furthermore, since the mass and the resistance of the enlarged lattice structure increase, it is necessary to increase the strength of the rod and the output of the driving device.

Also, even if the turbulent flow generation device 100 is installed on a floating body floating on the water surface or submerged in water, the device becomes larger in size, so in the case of the floating body method, flooding of the buoyant body It is necessary to consider how to put measures that can respond to the effects of river flow, wind, etc.
In the case of the sedimentation method, measures against inundation of the sunken body, in particular, pressure resistance is a problem, and therefore sufficient measures are required.

  As described above, the turbulent flow generation device 100 used in the experiment has too many problems, and it is not suitable to use it for water blooms and aquatic plants growing in stagnation such as rivers.

OBJECT OF THE INVENTION
This invention is proposed in order to solve each said problem, The objective is a simple structure, and water is suppressed by suppressing the growth of the aquatic plant grown in the stagnant places, such as a river, etc. An object of the present invention is to provide a water environment improvement device capable of improving the environment.

In order to achieve the above object, the apparatus for improving the water environment according to the present invention is in an aqueous system in which phytoplankton such as blue-green algae exists, and causes the aquatic plants to be stressed by giving turbulent flow to the growing water area. To control the growth of aquatic plants,
It is preferable that the means for giving turbulent flow is provided with a self-oscillating vibrator that vibrates by itself and generates turbulent flow by ejection of a fluid supplied from the outside, and a vibrator holding member for holding the self-oscillating vibrator. It features.

  According to the water environment improvement device of the present invention, the self-oscillation vibrator vibrates by itself by ejecting the fluid supplied from the outside to generate the turbulent flow. By generating this turbulent flow toward the aquatic plants, it is possible to give stress to the aquatic plants and suppress the growth of the aquatic plants. As a result, it is possible to suppress the growth of aquatic plants growing in a stagnant place such as a river with a simple configuration, and to improve the water environment.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view which shows 1st Embodiment of the water environment improvement apparatus which concerns on this invention. It is a whole perspective view which shows the vibrating body holding member which comprises the water environment improvement apparatus of the said 1st Embodiment. It is a longitudinal cross-sectional view along the III-III line in FIG. It is a figure explaining the self-excitation vibration state of the various self-excitation vibrating body which comprises the water environment improvement apparatus of the said 1st Embodiment, FIG. 4 (A) is a tube nozzle of this embodiment which comprises a self-excitation vibrating body. 4 (B) shows a tube nozzle having a fin portion, and FIG. 4 (C) shows a self-oscillating vibration state of the tube nozzle having a tube nozzle having a fin portion connected to the tip of the tube nozzle. It is a figure which shows the waveform at the time of arrange | positioning a sensor in the immediate vicinity of a jet nozzle, without making the tube nozzle of said 1st Embodiment self-excitedly vibrate. It is a figure which shows the waveform of the turbulent flow at the time of self-excited oscillation of the tube nozzle of said 1st Embodiment, and arrange | positioning a sensor in the immediate vicinity of the jet nozzle. It is a figure which shows the result of the turbulent flow setting obtained when sinking and using the water environment improvement apparatus of the said 1st Embodiment in the bottom part of a river. It is a figure which shows the flow of the water for attracting | sucking and collecting a turbulent flow in order to collect blue green algae with the water environment improvement apparatus of the said 1st Embodiment. It is a figure which shows the flow of the water at the time of the water-bloom pressurization & discharge | release mode which pressurizes the collection | recovery of the water-environment improvement apparatus of said 1st Embodiment, collects, and grind | pulverizes finely pulverized green-bloom. It is a figure which shows the flow of the water in the turbulent flow generation mode which operates the water environment improvement apparatus of the said 1st Embodiment, and generates a turbulent flow. It is a figure which shows the flow of the water at the time of the aeration additional turbulence generation mode which added aeration (air mixing) to the state of the said FIG. It is a general view which shows 2nd Embodiment of the water environment improvement apparatus which concerns on this invention. The 3rd Embodiment of the water environment improvement apparatus based on this invention is shown, FIG. 13 (A) shows the self-oscillation vibrator which comprised combining two tube nozzles from which length differs, and FIG. 13 (B) is in the middle It is a figure which shows the self-excitation vibrating body of the structure which branched the nozzle and increased the excitation part. It is a figure which shows 4th Embodiment of the water environment improvement apparatus which concerns on this invention. It is a figure which shows the timing of the water supply in the water environment improvement apparatus of the said 4th Embodiment. It is a general view which shows the turbulent flow generation apparatus experimented in order to investigate the influence which a turbulent flow gives to aquatic plants.

First Embodiment
Below, based on FIGS. 1-11, 1st Embodiment of the water environment improvement apparatus based on this invention is described.

  FIG. 1 is an overall view showing a water environment improving device 1 according to a first embodiment, and FIG. 2 is a perspective view showing the whole of a nozzle holding pipe 11 which is a vibrator holding member constituting the water environment improving device 1.

  The water environment improving device 1 according to the first embodiment generates a turbulent flow toward the aquatic plants and gives stress to the aquatic plants for aquatic plants grown in a stagnant place such as a river. In the water area where the algae bloom is suppressed, it attempts to improve the aquatic environment by collecting the algae and finely grinding the colony of the algae to make it easy to be eaten by zooplankton. is there.

As shown in FIG. 1, the water environment improvement device 1 holds the tube nozzle 10, which is a self-oscillating vibrator that vibrates by itself and generates turbulence due to the ejection of fluid supplied from the outside, and the tube nozzle 10. The nozzle holding pipe 11, the fluid supply means 20 for supplying the fluid to the tube nozzle 10, and the blue flour crushing and pressing means 39 for finely crushing, pressing and releasing the collected green algae colony There is.
In addition, in FIG. 1, since the connection state of each structural member is only shown, the flow direction of the first three-way valve 27 and the second three-way valve 37 for switching the flow of fluid (water) is Not shown.

The nozzle holding pipes 11, 11 are designed to be used by sinking to the bottom of a stagnant place such as a river, and in the embodiment, two nozzle holding pipes 11, 11 are disposed substantially in parallel at an interval. It is done.
Each of the nozzle holding pipes 11, 11 is attached with the tube nozzle 10, which vibrates itself by the jet of water, which is a fluid supplied to the inside, to generate a turbulent flow.

As shown in FIG. 1, a plurality of tube nozzles 10 of a predetermined length (three in the embodiment) are attached to the nozzle holding pipes 11, 11.
The tube nozzle 10 is made of, for example, silicone rubber, and one having an inner diameter of, for example, 4 mm and an outer diameter of 6 mm is used.
And each tube nozzle 10 is formed in the same length of, for example, 30 cm, and the proximal end of each tube nozzle 10 is provided in the nozzle mounting portion 11A provided in advance in the nozzle holding pipes 11, 11. It is removably attached.

  The tube nozzle 10 is not limited to silicone rubber, and may be a nylon tube, a urethane tube, or the like, as long as it has sufficient plasticity to cause self-excitation vibration by jetting water.

Moreover, the inner diameter dimension and outer diameter dimension of the tube nozzle 10 are not limited to said each dimension, For example, you may use the thing of about +/- 0.5 mm of the said dimension.
Furthermore, in this embodiment, although the thing of 30 cm in length was used for the tube nozzle 10, it is not limited to the length. For example, one having a size of 10 cm to 50 cm may be used depending on the location of use, the state of wet vegetation, the type of aquatic plant, and the like.
Moreover, in this embodiment, although the three tube nozzles 10 are attached to the nozzle holding | maintenance pipe 11 and 11, three or less, or three or more may be attached.

As shown in FIG. 2, the nozzle holding pipes 11, 11 are supported at both ends in the longitudinal direction of the nozzle holding pipes 11, 11, and when the nozzle holding pipes 11, 11 are sunk in the bottom of the river, A holding member installation means 13 is provided to ground at the bottom.
The holding member installation means 13 is formed of, for example, a stainless steel plate having a predetermined width and, as shown also in FIG. A body portion 13A formed in an end-spread shape is formed, and a ground portion 13B bent outward is provided at the tip of the body portion 13A.

An attachment adjustment mechanism 14 for adjusting the degree of attachment of the main body portion 13A to the nozzle holding pipe 11 is formed opposite to the upper portion of the main body portion 13A, and these attachment adjustment mechanisms 14 are opposed to the main body portion 13A. A bolt 15 is interposed between the two, and a nut 16 is screwed to the bolt 15.
Therefore, by loosening or tightening the nut 16 with respect to the bolt 15, as shown in FIG. 3, the orientation of the nozzle holding pipe 11 and hence the orientation of each tube nozzle 10 can be adjusted. As a result, it is possible to cope with the state of aquatic plants growing in stagnation such as rivers.

Each of the nozzle holding pipes 11, 11 is formed of, for example, a stainless steel round pipe member of a predetermined diameter to have a predetermined length, and water, which is a fluid, or water and air can be circulated therein. There is.
The nozzle holding pipes 11 may not be made of stainless steel, and may be made of synthetic resin such as PP (polypropylene) or polyvinyl chloride. The nozzle holding pipes 11 may not necessarily be round pipe members, and may be square pipes or the like. The point is that the pipe member should be excellent in water resistance and rigidity.

As shown in FIG. 2, one longitudinal end of the nozzle holding pipes 11, 11 is closed by an end plate (not shown), and the fluid supply means 20 is formed at the other end. A hose attachment portion 11B for a branch hose 34A of a nozzle side water supply hose 34 for sending water sent from the pump 21 into the nozzle holding pipes 11, 11 is provided.
The nozzle side water supply hose 34 is connected to a discharge hose 24 provided across the pump 21 and the first three-way valve 27 by switching the first three-way valve 27.

Further, as described above, the nozzle mounting portion 11A for attaching the proximal end portion of each tube nozzle 10 is provided on the outer peripheral portion of the nozzle holding pipes 11, 11.
The nozzle attachment parts 11A are provided at five places so that, for example, five tube nozzles 10 can be attached, but in the first embodiment, three of the nozzle attachment parts 11A are used, and The tube nozzles 10, 10, 10 are attached to the nozzle attachment portion 11A.
And as above-mentioned, although you may use how many tube nozzles 10 according to the kind of grass, and a prosperous state, you may attach a blind plug (illustration abbreviation) to nozzle attachment part 11A which is not used. .

As shown in FIG. 1, the water environment improvement device 1 includes the fluid supply means 20 for supplying water, which is a fluid, to each of the plurality of tube nozzles 10 as described above.
That is, the fluid supply means 20 includes a pump 21 for feeding water to the nozzle holding pipes 11 and 11 through the discharge hose 24, the first three-way valve 27, and the nozzle side water supply hose 34, and a motor 22 for driving the pump 21. And a generator 23, and a suction hose 25 for sucking water from a river or the like by driving the pump 21.

The tip of the suction hose 25 is, for example, introduced into a river, and the hose proximal end is connected to the pump 21.
A relatively coarse filter 26 is provided at the suction port of the suction hose 25 so as not to suction dust and the like.
Further, in the discharge hose 24, a relief valve 29 and a pressure gauge 30 are provided in the middle of connecting the pump 21 and the first three-way valve 27.
The relief valve 29, also referred to as a safety valve, is responsible for monitoring the maximum pressure of the entire system to protect the system, and the released fluid is open to the atmosphere or to the water.
Further, a pipe 33 for supplying aeration air (air) equipped with an air valve 31 and a check valve 32 is disposed between the pump 21 and the relief valve 29 and the pressure gauge 30.

As described above, the discharge hose 24 is provided between the pump 21 and the first three-way valve 27 and is connected to the nozzle-side water hose 34 by switching the first three-way valve 27. There is.
The tip end side of the flow of the nozzle side water supply hose 34 is connected to two branch hoses 34A and 34A by a branch pipe 35 such as cheese.
And these branch hoses 34A, 34A are connected to the said hose attachment part 11B of the nozzle holding | maintenance pipe 11,11.

Next, self-oscillation vibration of the tube nozzle 10 will be described based on FIG.
FIG. 4A shows a self-oscillation vibration state of the tube nozzle 10 of the present embodiment, and FIG. 4B shows a self-oscillation vibration state of the tube nozzle 10A having a fin portion. A self-oscillation vibration state of a composite tube nozzle 10B configured by bonding the tube nozzle 10A to the tip of the tube nozzle 10 is shown in (C).
Here, although the tube nozzle 10 of FIG. 4 (A) is used in this embodiment, the tube nozzle 10A of FIG. 4 (B) and the tube nozzle 10B of FIG. 4 (C) can also be used.
And jet J which spouts from the tip of each of these tube nozzles 10, 10A, and 10B, and turbulent flow T have become a vibration element.

Each flow will be described in more detail.
The jet J is originally a high-speed flow of fluid (water), and when it jets out into the still water, a strong shear force is exerted at the interface to advance in the laminar flow L direction while generating an intermittent flow.
The jet flow J also works in the same way as the vibration of the vibrating element with respect to static water, even when the direction changes with the self-excited vibration of the tube nozzle 10 and the like.

Here, since the jet flows intermittently in the portion of the laminar flow L, the flow becomes turbulent in the definition of the flow, and if it becomes a little further downstream where the jet can not be observed, the jet and the flow caused by being drawn into the jet are sufficiently agitated. It becomes a flow that has been And in FIG. 4, it is a turbulent flow area | region in the area | region where a jet stream is represented by a dotted line.
Further, strictly speaking, the turbulent flow T is the lattice turbulent flow T generated by the tube nozzle 10 on the principle equivalent to the turbulent flow due to the lattice vibration, the jet J is the turbulent flow J of the jet, and the laminar flow L is the intermittent flow of the jet The turbulent flow L can be expressed respectively.

The tube nozzle 10 or the like generates complex turbulence in which fan-like, circular, or figure-like motions are combined by self-excited vibration at several Hz to several tens of Hz depending on the conditions, and generates a turbulent flow T.
That is, the tube nozzle 10, etc. self-excites by the reaction force generated when water or air is ejected from the tube nozzle 10 etc. to cause bending movement, and this bending movement is called forward wave movement. The movement is almost the same as that of the fish's caudal fin, thus generating propulsion or stirring power.

In the case of aquatic plants, the technical element is the mechanism to stress the plants and disturb the growth by the turbulent flow of new findings, so the area covered by the turbulent flow needs to be within the technical elements of the design and construction of this device is there.
The lattice turbulence is a kind of wave propagation, so the propagation range is not as wide as jets and convection, but in the present invention, the lattice turbulence and turbulence by jets etc. are generated together, so the range of influence is wide.

  Since the nozzle holding pipes 11 and 11 always bear the reaction of the vibrational motion of the tube nozzle 10, it is necessary to regulate the elasticity and the range of motion of the support, whereby the tube nozzle 10 is as expected. You will be shaking.

  Here, based on FIGS. 5 and 6, the piezoelectric acceleration sensor is disposed at a position directly receiving the water flow blown out from the tube nozzle 10, and when the water flow is actually blown out, the water flow is not blown out. The waveform with the case will be described. This experiment was conducted by filling a container such as a water tank with water.

First, the waveform in the case where the water flow is not blown out from the tube nozzle 10 is as shown in FIG. 5, and no change is observed. As a result, it has no effect on aquatic plants.
Next, the waveform when the water flow was actually blown out from the tube nozzle 10 is as shown in FIG. 6, and the amplitude was wide. As a result, it can be inferred that a strong impact is given to aquatic plants.

When each tube nozzle 10, 10A, 10B of FIG. 4 (A)-FIG.4 (C) is utilized as the water environment improvement apparatus 1, the lattice 101 for vibration of the turbulent flow generation apparatus 100 used for experiments as mentioned above. The following advantages can be obtained.
That is, when each tube nozzle 10, 10A, 10B is regarded as a vibration source, each tube nozzle 10, 10A, 10B can be said to be a vibration device, but the principle of this vibration device belongs to the fluid mechanism and the pressure fluid is It becomes a power source.

Also, the pressure fluid may be water, air, etc., and may be a mixed two-layer fluid thereof. In the case of water, the pressure fluid source is tap water, pump-up water of rivers, etc., water of elevated tanks, etc. In the case of air, it is possible to use the compressed air of the place, air such as a cylinder, etc., and collect the fluid after use by using the one that does not affect the target water system. There is no need to
Therefore, since there is no device that uses lubrication etc. in water, even if the device is broken or broken, contamination with lubricating oil or the like does not occur.

  Furthermore, even if the energy source of the device that produces pressure fluid is electricity, this device can be installed on the ground (land) and the pressure fluid can be supplied by a hose, so there is no power electric equipment in the water, and a flood should occur. It has the advantage of being able to be installed at a high place where the motorized power equipment such as the motor will not go into water even if it happens, and the electrical safety is high.

  As described above, in the water area where phytoplankton such as algal blooms grow, the water environment improvement device 1 collects, accommodates and crushes the algal blooms, and crush / pressurization means of the algal blooms 39 to be crushed. Is equipped.

  That is, as shown in FIG. 1 and FIG. 8 etc., the group crushing / pressurizing means 39 of the blue-green algae rapidly changes the flow velocity of the fluid (water) containing the blue-green a and changes the shocking pressure and the large shear force. A group crushing mechanism 41 of the blue algae which finely pulverizes the group of the blue algae a, and a pressure container 40 which is a pressure mechanism of the blue algae which accommodates and pressurizes the blue algae which has been finely pulverized the group. .

The inside of the pressure vessel 40 is a sealed space, and in the pressure vessel 40, a filter 49 for filtering and collecting green algae a is disposed at one end in the longitudinal direction. As this filter 49, relatively fine eyes are used.
At the one side end of the pressure container 40, a pressure container hose 44 connected to the pump 21 is provided. A second three-way valve 37 is disposed on the pump 21 side of the pressurizing container hose 44, and a filter 28 is disposed between the second three-way valve 37 and the pump 21.

The end of the discharge hose 24 opposite to the pump 21 is connected to the first three-way valve 27 as described above.
In the first three-way valve 27, by switching the first three-way valve 27 appropriately, the nozzle side water supply hose 34 or the addition of water from the discharge hose 24 can be fed to the nozzle holding pipes 11, 11. A container side hose 45 that can be fed to the pressure container 40 is connected via a pressure container hose 44.
The container side water supply hose 45 is provided with a check valve 46 which allows the water from the discharge hose 24 to pass.
As the first three-way valve 27 and the second three-way valve 37, so-called L-shaped valves are used.

The pressurized container 40 is provided with a blue algae collecting pipe 42 for collecting the blue algae a, and the check valve for letting the water containing blue algae a from the blue algae growing position pass through the blue algae collecting pipe 42 43 is provided, and the check valve 43 constitutes the colony crushing mechanism 41 of the blue-green algae.
Further, a pressurized water discharge pipe 47 is provided at the other end in the lengthwise direction of the pressure vessel 40 for discharging finely pulverized green algae a inside the pressure vessel 40 to the nozzle holding pipes 11 with the pressurized water. ing. The pressurized water discharge pipe 47 is provided with a relief valve 48 for passing water containing waterweed from the inside of the pressure vessel 40. The relief valve 48, together with the check valve 43, functions as a group crushing mechanism 41 for water bloom. Configured.

Here, the water collected by the algal collecting pipe 42 and the blue algae a increase in flow velocity by the throttling portion at the check valve 43 and collide inside the valve, and the velocity rapidly drops in the pressure vessel 40. The pressure change occurs rapidly at this, and the colonies of the blue-green a are crushed.
In addition, when the blue algae a passes through the check valve 43, it collides with the squeezed portion or the like of the internal structure of the check valve 43, so that a large shear force is generated, and the colony of the blue algae a is also finely pulverized.

Furthermore, since the relief valve 48 is also provided in the pressurized water discharge pipe 47 provided in the pressurized container 40, the shear described above is also applied when discharging pressurized water from the inside of the pressurized container 40 to the nozzle holding pipes 11, 11. By the force, colonies of blue-green a are finely pulverized.
Then, here, as mentioned above, the check valve 43 and the relief valve 48 constitute the group crushing mechanism 41 of the blue-green algae.
Here, the relief valve 48 determines the pressurizing force of the pressurizing container 40, and the fluid that has passed through the relief valve 48 flows to the pressurized water discharge pipe 47, and does not release the fluid after release. It has become.
Therefore, the set pressure of the relief valve 48 is set to a smaller set value than the set pressure of the relief valve 29. That is, the set pressure is relief valve 29> relief valve 48, and the set pressure of the relief valve 29 works as a safety valve that determines the maximum pressure of the present apparatus.

  Next, based on FIGS. 8-11, the effect | action which collects and pressurizes blue-green algae with the water environment improvement apparatus 1, and generates a turbulent flow toward the waterweed wp is demonstrated.

First, the flow of water in the water-bloom suction mode will be described based on FIG.
In FIG. 8, portions indicated by thick lines inside the first three-way valve 27 and the second three-way valve 37 are in a state of being previously switched to the flowing direction of water, and A and A indicated by black solid lines. The flow along the 'is the direction of the flow of water drawn up from the pressure vessel 40.
Arrows B and B 'indicated by dotted lines indicate a state in which water does not flow.

In order to collect the blue-green algae, the pump 21 is operated to first draw water from the blue-green algae collection pipe 42 disposed in the growth water area of the blue-green acoa into the pressure vessel 40 and Suction is performed to the pump 21 through the filter 49 in the pressure vessel 40.
When water-bloom a is sucked into the pressure vessel 40 with water, as described above, a sudden pressure change when passing through the check valve 43 and when being sucked into the pressure vessel 40; The large shear force generated by colliding with the squeezed portion etc. of the internal structure of c.

With the operation of the pump 21, the blue-green algae a is also suctioned together with the water in the pressurized container 40.
However, since the fine container 49 is provided in the pressure vessel 40, as described above, the group of the blue-green algae finely ground when passing through the check valve 43 is captured by the filter 49 and pressurized. Water is sucked into the container hose 44, and the group of blue-green algae a floats in the pressure container 40 in a finely pulverized state.

  The water sucked from the inside of the pressure vessel 40 and the finely ground blue-green algae a reach the pump 21 via the second three-way valve 37 and are discharged from the pump 21 to the discharge hose 24, and It flows into the nozzle side hose 34 extended along the arrow A 'direction of a thick line via the three-way valve 27 of the.

The water flowing in the nozzle side hose 34 is introduced from the branch hose 34A at the tip of the nozzle side hose 34 to the nozzle holding pipes 11 and 11 installed in the bottom of the water and equipped with the nozzle holding pipes 11 and 11. The respective tube nozzles 10 are self-excited and oscillated, respectively.
And the turbulent flow which generate | occur | produces by the self-excitation vibration of the tube nozzle 10 collides with the waterweed wp, and gives stress to the waterweed wp by this.

  The above-mentioned action is continued until the amount of the blue-green algae a finely divided in the pressure vessel 40 and the blue-green algae a present in a floating state and the blue-green algae a captured by the filter 49 reach a certain amount. And this action is equivalent to the turbulent flow generation mode described later.

A certain amount of floating blue algae a and blue algae a captured in the filter 49 is within the pressure vessel 40, for example, an amount such that the suction of water from the pressure vessel 40 by the pump 21 is deteriorated. When it accumulates, as shown in FIG. 9, it shifts to the blue mold pressurization mode, sends pressurized water into the pressure vessel 40, and mixes the blue algae a floating in the pressure vessel 40 with the water in the pressure vessel 40. The ink is discharged to the outside, that is, to the nozzle holding pipes 11 and 11 side.
That is, first, the second three-way valve 37 is switched so that water is in communication with the suction side of the pump 21 and the suction hose 25, and water from the discharge side of the pump 21 is container-side water supply It switches so that it may flow to the hose 45 side, and it is made to flow to the pressurization container 40 side.

By driving the pump 21, water is sucked from the suction hose 25 via the second three-way valve 37 to the pump 21 and discharged from the pump 21 to the discharge hose 24.
The water of the discharge hose 24 is sent to the container-side water hose 45 via the first three-way valve 27, and flows from the container-side water hose 45 into the pressure container 40 via the pressure container hose 44. Do.

Then, the pressurized water is sent to the nozzle holding pipes 11 and 11 from the pressure vessel 40 through the pressurized water discharge pipe 47 together with the blue-collar a of which group is finely pulverized, and the tube nozzles attached to each Vibrate 10 self-excited.
The relief valve 48 is provided in the pressurized water discharge pipe 47, and when the green algae a, which has been crushed in advance in the group, passes through the relief valve 48, it is further finely pulverized by a rapid pressure change or the like as described above. It is discharged from the pressurized water discharge pipe 47 in the state.

  Turbulence generated by the self-excited vibration of these tube nozzles 10 collides with the aquatic plants wp, and stresses the aquatic plants wp growing in the stagnant place.

Here, pressing and colliding the algae makes the colony of the algae be finely crushed, as described in the "58th Annual Scientific Lecture Meeting of the Japan Society of Civil Engineers (September, 2003)" It is proved by the article of "Development of processing device".
That is, to describe the outline, it is said that when the cyanobacteria having gas vesicles are pressurized to 0.3 MPa or more, the buoyancy disappears. The buoyant blue algae settle and become unable to perform photosynthesis and eventually die. It is also said that cyanobacteria forming a colony structure are easily divided by zooplankton because they are fragmented by collisions.
And the blue-bloom processing device has been developed to prove them.

In the place where only the aquatic plants wp are grown, as shown in FIG. 10, it is performed in the turbulent flow generation mode.
That is, first, the second three-way valve 37 is switched so that the water from the suction hose 25 flows to the suction side of the pump 21, and the first three-way valve 27 is discharged and the water from the discharge side of the pump 21 is a discharge hose 24, it is switched so as to flow to the nozzle holding pipes 11, 11 through the nozzle side water supply hose 34.

  By driving the pump 21, water is sucked from the suction hose 25 through the second three-way valve 37 to the pump 21 and discharged. The water discharged from the pump 21 flows from the discharge hose 24 through the first three-way valve 27 and the nozzle side water supply hose 34 to the nozzle holding pipes 11 and 11 side.

And the water sent to the nozzle holding | maintenance pipe 11 and 11 is sprayed from the front-end | tip of the tube nozzle 10 attached to each, and self-excites each tube nozzle 10 by this.
Turbulence generated by the self-excited vibration of these tube nozzles 10 collides with the water plants wp, and stresses the water plants wp.

When the water is jetted from the tube nozzle 10 to generate the turbulent flow toward the aquatic plants wp, the air can be jetted simultaneously.
In this case, the flow is as shown in FIG. That is, in the turbulent flow mode shown in FIG. 10, the air valve 31 disposed between the pump 21 and the first three-way valve 27 is opened, and air is fed to the discharge hose 24 via the air introduction pipe 33.

Then, water mixed with air is sent from the discharge hose 24 through the first three-way valve 27 and the nozzle side water supply hose 34 to the nozzle holding pipes 11 and 11 and spouted from the tip of the tube nozzle 10 attached thereto. Thereby, each tube nozzle 10 is vibrated by itself.
Then, the turbulent flow of air bubbles b mixed generated by the self-excited vibration of these tube nozzles 10 collides with the water plants wp and gives stress to those water plants wp.
In addition, the air-containing water is a bent portion generated by the self-excited vibration of the nozzle 10 because fluid having a large density, such as water and air and micro air bubbly water, passes as an irregular mass in the nozzle 10 The amplitude of self-oscillation increases and becomes irregular because the centrifugal force when passing through changes irregularly.
Then, the reaction force when spouting from the nozzle 10 changes irregularly, and the vibration of the nozzle 10 is irregularized and enlarged. As a result, the generated turbulence also increases. Furthermore, the emitted air is accompanied by an aeration effect.
In addition, also when sending the water from the pressure vessel 40 to the nozzle holding pipes 11 and 11 side in the water-bloom suction mode of the explanation of FIG. 8 described above, the water mixed with air is sent as described above to mix the bubbles b. Turbulence can collide with the aquatic plants wp.

When water from rivers and the like is directly taken in by suction hose 25 in the water area where green algae does not grow, fine mud and broken leaves etc. may be sucked into filter 26, so that sufficient amount of water can not be taken in It also happens.
At such time, periodically, the pressurized container 40 can also be used as a filter substitute.

In this case, the flow of water in the water-bloom collection mode may be set as described above.
That is, first, the second three-way valve 37 is switched so that the water from the pressurized container hose 44 can be sucked up by the pump 21, and the water discharged from the pump 21 is the discharge pipe 24 and the nozzle side hose The first three-way valve 27 may be switched so as to flow toward the nozzle holding pipes 11 and 11 via 34, and the pump 21 may be driven.

FIG. 7 shows the result of sinking the nozzle support pipe 11 of the water environment improvement device 1, the pressurizing container 40, etc. in the river and operating the pump 21 etc. to apply the turbulent flow from the tube nozzle 10 to the aquatic plants wp. ing.
From the measurement results shown in FIG. 7, it was possible to confirm the influence of the turbulent flow on the aquatic plants wp. In this experiment, one tube nozzle 10 is used to generate turbulent flow.
Here, as shown in FIG. 2, although five tube nozzles 10 can be used for the nozzle support pipe 11, in the experiment, turbulence is generated using one of the tube nozzles 10. It is

In order to obtain the measurement results of FIG. 7, the water environment improving apparatus 1 was submerged in a river to conduct a field experiment.
Field experiments were conducted under the following conditions.
Date: September 17, 2016 (Sat)
Place: Miyoshi City, Hiroshima Prefecture, Toshi Dam downstream of the river confluence 1km ago Target aquatic plants: Water plants (Okanadamo)
Installation device: Manifold (holding pipe) connection tube nozzle (length 500mm) 1 installation position: river bottom (water depth about 500mm)
Erupting fluid: River water (in-place intake)

In order to obtain a more effective influence of the occurrence of turbulent flow on the aquatic plant wp according to the growing environment of the aquatic plant wp, it is an essential condition to increase the turbulent intensity.
Therefore, the size of the apparatus can be increased, the number of tube nozzles 10 can be increased, the arrangement of the tube nozzles 10 can be considered, the structure of the tube nozzles 10 can be studied, and the jetted fluid can be considered (water / air).
In the first embodiment, the number and length of the tube nozzles 10 and the type of fluid are set based on the above experimental results.

(Effect of the first embodiment)
According to the water environment improving apparatus 1 of the first embodiment configured as described above, the following effects can be obtained.

(1) Since the tube nozzle 10 vibrates by spouting the water discharged from the pump 21 constituting the fluid supply means 20, the tube nozzle 10 is used as a growing water area of the aquatic plant wp containing phytoplankton such as blue-green algae By arranging the jet nozzle of the tube nozzle 10 toward the aquatic plants wp to generate turbulent flow, it is possible to stress the aquatic plants wp in particular and to suppress the growth of the aquatic plants wp. As a result, it is possible to suppress the growth of blue-green algae growing in a stagnant place such as a river or the like, especially aquatic plants wp, with a simple configuration, and improve the water environment.

(2) Since the turbulence generated by the water jetted from the tip of the tube nozzle 10 or the water mixed with air is made to collide with the aquatic plants wp growing in the stagnant part of the river or the lake, stress on the aquatic plants wp Can be given. As a result, the growth of the aquatic plant wp can be suppressed, and the overgrowth of the aquatic plant wp can be prevented in advance, and the water environment can be improved.

(3) Since the tube nozzle 10 is formed of silicone rubber having a total length of 30 cm, an inner diameter of 4 mm and an outer diameter of 6 mm, self-excited vibration occurs even with water or air fed from the pump 21 through the discharge hose 24 It is possible to generate more turbulence and to give greater stress to the aquatic plants wp.

(4) The tube nozzle 10 having a total length of 30 cm is used for each of the two nozzle holding pipes 11 and 11. Therefore, when the tube nozzle 10 vibrates itself by the injection of water, the tube nozzle 10 and the water grass wp When it is in contact, direct contact between the tube nozzle 10 and the aquatic plant wp can give a stronger stress than turbulent flow.

(5) Three tube nozzles 10 having a total length of 30 cm are provided at predetermined intervals, and the range of the self-excited vibration is increased, so that it is possible to cope with the aquatic plants wp in a wide range.

(6) Both end sides in the length direction of the nozzle holding pipes 11, 11 are supported by the support legs 13, and two main parts 13A and two ground parts 13B are formed on the support legs 13, respectively. Can be stably placed on the bottom of rivers and so on.

(7) The tube nozzle 10 is replaceable to the nozzle holding pipes 11 and 11, and the number of attached tube nozzles 10 can be increased according to the growth condition of the blue algae a and the water grass wp. As a result, since it can be used for any growing place such as aquatic plants wp, it has high utility value.

(8) In the river where both the blue-green a and the aquatic plants wp are growing, using the water environment improvement device 1, the collected blue-green a After pulverizing the group of particles, it can be supplied to the nozzle holding pipes 11 and 11 together with the pressurized water, whereby the turbulent flow can be applied from the tube nozzle 10 to the aquatic plants wp. As a result, since strong stress is given to the aquatic plant wp, growth can be suppressed. In addition, the algae is preyed by being shrunk to a size that is likely to be feed for zooplankton due to pulverization of the colony. Thus, the water environment can be improved by suppressing the growth of both the blue-green a and the aquatic plants wp.

(9) In the water area where green algae a is not grown, the pressure vessel 40 can be used as a filter instead by switching the first and second three-way valves 27 and 37 appropriately depending on the case. Is high.

Second Embodiment
Next, a second embodiment of the water environment improving apparatus according to the present invention will be described based on FIG.
The water environment improving device 2 of the present embodiment includes the fluid supply means 50 configured to include the tube pump 51, the in-line mixer 57 and the pressure tube 54.
In FIG. 12 showing the water environment improving apparatus 2 of the second embodiment, the same members as those of the water environment improving apparatus 1 of the first embodiment are denoted by the same reference numerals, and only different parts will be described.

  In the water environment improvement device 2 of the second embodiment, the fluid supply means 50 is connected to a suction hose 55 for sucking in water such as rivers, a tube pump 51 for sucking water from the suction hose 55, and the tube pump 51 Comprising the known in-line mixer 57, the pressure tube 54 connecting the in-line mixer 57 and the nozzle holding pipes 11 and 11, the electric motor 52 for driving the tube pump 51, and the generator 53. ing.

The inline mixer 57 is connected to the tube pump 51, and the water discharged from the tube pump 51 and the blue algae a are stirred when passing through the inside of the inline mixer 57, so that the group of blue algae a is It is intended to be finely ground.
Then, the green algae a finely pulverized by the in-line mixer 57 is sent to the pressure tube 54 together with the water.

  The tip of the pressure tube 54 is connected to the branch hoses 54A, 54A by a branch pipe 56, and the branch hoses 54A, 54A are connected to the nozzle holding pipes 11, 11, and these nozzle holding pipes 11, 11 Each is equipped with three of the tube nozzles 10.

The tip of the suction hose 55 is inserted into the growth area of blue-green algae such as rivers and swamps, and the hose inner diameter is, for example, 50 to 60 mm so that the blue-green algal water can be sucked up by driving the tube pump 51 ing.
In addition, hose internal diameter is not limited to the said thing of 50-60 mm.

  The tube pump 51 constituting the fluid supply means 50 pushes out the fluid etc. in the rotational direction of the rotor and suctions the transfer substance, ie fluid etc. by the vacuum pressure generated when the crushed tube is restored. It is a structure.

The flow rate and pressure can be adjusted by controlling the rotation of the tube pump 51 by the electric motor 52. Then, when water is sucked up and fed to the pressure tube 54, water pressure can be fed at, for example, about 0.5 Mpa.
Therefore, the green algae a sucked up by the tube pump 51 is finely pulverized by the in-line mixer 57, and the finely pulverized green algae a is fed into the nozzle holding pipes 11 and 11 together with the pressurized water, and the tube nozzle 10 of the nozzle holding pipes 11 and 11 From the turbulence can collide with the aquatic plants wp.

In addition, although the water environment improvement apparatus 2 of 2nd Embodiment is applied to the water area in which the algae A and the aquatic plant wp are growing as mentioned above, it arranges in the water area in which only the aquatic plant wp is growing Of course it is good.
In this case, the suction hose 55 is inserted into the water area in which only the waterweed wp is growing, and water is sucked therefrom by the pressure tube 54, and the water is discharged from the in-line mixer 57 into the pressure tube 54, from the branch hoses 54A and 54A. It may be fed into the nozzle holding pipes 11, 11.
Alternatively, the air valve 31 may be adjusted to send air for aeration to the pressure tube 54 to eject water mixed with air. Furthermore, as described above, when the water environment improving device 2 is applied to the water area in which algal blooms are grown, water mixed with air may be jetted out.

According to the water environment improving apparatus 2 of the second embodiment having the above-described configuration, other effects substantially similar to the effects of the above (1), (2), (4), (6), and (7) The following effects can be obtained.
(11) Since the fluid supply means 50 of the water environment improvement device 2 is configured to include the tube pump 51, the in-line mixer 57, and the pressure tube 54, the blue flour a is sucked by the suction hose 55 and The discharged green algae a colony can be finely pulverized by the in-line mixer 57 to be easily preyed on zooplankton. As a result, it is possible to suppress the growth of both blue-green a and aquatic plants wp, and to improve the water environment.

(12) The fluid supply means 50 of the water environment improving device 2 is configured to include the tube pump 51 and the pressure tube 54, and by operating these, the growth of both the blue-green a and the aquatic plant wp is suppressed. Therefore, the first and second three-way valves 27 and 37 and the pressure vessel 40 used in the water environment improving device 1 according to the first embodiment are not necessary. As a result, the apparatus can be simplified.

Third Embodiment
Next, a third embodiment of the water environment improving apparatus according to the present invention will be described based on FIG.
In the water environment improving devices 1 and 2 according to the first and second embodiments, three tube nozzles 10 as self-oscillating vibrators are attached to the nozzle holding pipes 11 and 11, respectively, and each of them is unified into the same length. Although configured, the water environment improving device 3 of the third embodiment is configured by attaching different types of nozzles to the nozzle holding pipes 11.

That is, as one type, as shown in FIG. 13A, a combination of two tube nozzles 60A and 60B of different lengths is bound, for example, at one place in the middle of each length direction. The combination nozzle 60 may be attached to the nozzle attachment port 11A of the nozzle holding pipes 11, 11 as one combination nozzle 60 by being bound by the member 61.
When combining the two tube nozzles 60A and 60B, as described above, the middle positions in the respective length directions are bound by a predetermined binding member 61, whereby the two do not get tangled during self-excited vibration. It has become.

Alternatively, as shown in FIG. 13B, for example, three branch nozzles 65A, 65B, 65C may be provided in the middle of the tube nozzle 65 to increase the number of vibration parts.
The tube nozzle 65 may be attached to the nozzle attachment port 11A of the nozzle holding pipes 11, 11.

  In the third embodiment, for example, three combined nozzles 60 shown in FIG. 13A and two tube nozzles 65 shown in FIG. 13B are attached to the nozzle holding pipes 11 and 11, for example. It is done.

In the above configuration, the combination nozzle 60 and the tube nozzle 65 may be the tube nozzle 10B having the shape shown in FIG. 4 (C).
In addition, along the entire length of the combination nozzle 60 and the tube nozzle 65, or in the middle in the lengthwise direction, fin portions (not shown) may be provided at a plurality of locations.

According to the water environment improving device 3 of the third embodiment configured as described above, the following effects can be obtained in addition to the effects substantially similar to the effects (1) to (7).
(13) Two or three combined nozzles 60 and tube nozzles 65 are attached to each of the nozzle holding pipes 11 and 11, and the individual combined nozzles 60 and tube nozzles 65 themselves can not be predicted. Because of the complex motion of the turbulence, the range of turbulence can be expanded, and as a result, it is possible to cope with a wider range of aquatic plants wp.

Fourth Embodiment
Next, a fourth embodiment of the water environment improving apparatus according to the present invention will be described based on FIGS.
The water environment improving device 4 according to the fourth embodiment is developed to cope with the water grass wp which has spread over a wide range, and the A row nozzle group 77 and the B row nozzle group 78 arranged to face each other. And A row nozzle group 77 'and two rows of B row nozzle group 78' are arranged to face each other.

  Then, the two rows of the A row nozzle group 77 and the B row nozzle group 78, and the two rows of the A row nozzle group 77 'and the B row nozzle group 78' are disposed opposite to each other across the region of the target waterweed wp. By alternately operating each of the A row nozzle group 77 and the B row nozzle group 78, and the A row nozzle group 77 'and the B row nozzle group 78', the water grass wp between the nozzle groups 77 and 78, etc. It is configured to shake and give stress.

As shown in FIG. 14, in the water environment improving device 4, the tube nozzles 10 of the A row nozzle group 77 and the B row nozzle group 78 face each other, and the A row nozzle group 77 ′ and the B row nozzle group 78 ′ Each tube nozzle 10 is disposed to face each other.
Here, in FIG. 14, the A row nozzle group 77, 77 'and the B row nozzle group 78, 78' are disposed on the same plane, but the mounting positions of the nozzle mounting portions 71A, 72A are, for example, the upper and lower positions. You can change the direction by changing to.

The row A nozzle group 77, 77 'is composed of a pipe member 71 and a plurality of tube nozzles 10, and the row B nozzle group 78, 78' is composed of a pipe member 72 and a plurality of tube nozzles 10.
To the pipe members 71 and 72, a plurality of the tube nozzles 10 are attached which eject fluid water from the tip and generate turbulent flow.
And each of these tube nozzles 10 is attached to nozzle attachment part 71A, 72A of each pipe member 71, 72 in the state which the fluid jet nozzle of each said tube nozzle 10 faces.

As shown in FIG. 14, one end of each of the nozzle holding pipes 71 and 72 is connected to the electromagnetic switching valve 73, and the electromagnetic switching valve 73 is connected to the pump 74.
Further, connected to the electromagnetic switching valve 73 is a controller 76 that controls switching of the timing of water supply to the tube nozzles 10 of the nozzle holding pipes 71 and 72, that is, the A row nozzle group 77 and the B row nozzle group 78. ing.

Here, considering the waterweed nozzle and its arrangement, each tube nozzle 10 operates independently to perform self-excited vibration, so there may be places where interference and attenuation occur as the turbulent vibration propagates. Therefore, turbulence is effective only in the immediate vicinity of the jet flow of the nozzle and the vibration of the tube nozzle 10, and if the arrangement of the nozzles is separated to such an extent that the turbulence generated by the nozzles does not cause interference, damping by interference Will be minor.
However, when it is desired to generate strong turbulence in the target water area, the arrangement density of the nozzles is desired to be high, so the nozzles are arranged at intervals that are less likely to cause interference. And this space | interval is set to 30 cm, for example in the Example.

In that state, as shown in the water flow timing of FIG. 15, first, for example, water for vibration is supplied to each tube nozzle 10 of the A row nozzle group 77, 77 'via the nozzle holding pipes 71, 72 It is sent from 74.
Then, first, the water grass wp is finely shaken by the propagation of the turbulent flow caused by the progressive wave motion of the tube nozzle 10 and the trajectory of the jet supplied to the target area, and the progressive wave motion of the tube nozzle 10 by the jet is By the water flow, tilt the aquatic plants wp.

  Next, by stopping the flow of water to each tube nozzle 10 of the row A nozzle group 77, 77 ', the jet flow supplied to the target area disappears, so that the water grass wp swings back, and the water grass wp And the inertia of water cause overshoot.

Thereafter, water for vibration is fed from the pump 74 to the tube nozzles 10 of the B-row nozzle groups 78 and 78 'through the nozzle holding pipe 71.
Then, the water grass wp is finely shaken by the propagation of the turbulent flow caused by the progressive wave motion of the tube nozzle 10 and the trajectory of the jet supplied to the target area, and the water flow by the progressive wave motion of the tube nozzle 10 by the jet Thus, the waterweed wp is inclined to the A row nozzle group 77, 77 'side.
Thereafter, the above operation is repeated.

  The control of water flow is performed by setting the ON time of the electromagnetic switching valve and the pause time of water flow in advance by using a sequencer or the like to see the degree of tilt and swing of water grass wp.

According to the water environment improving device 4 of the fourth embodiment configured as described above, the following effects can be obtained in addition to the effects substantially similar to the effects of the above (1) to (7).
(14) In the water environment improvement device 4 of the fourth embodiment, water is alternately ejected from each tube nozzle 10 of the A row nozzle group 77, 77 'and each tube nozzle 10 of the B row nozzle group 78, 78'. Since the water grass wp is finely shaken using swinging of the water grass wp, stress can be caused by the water grass wp. As a result, the growth of the aquatic plants wp can be suppressed, and the water environment can be improved.

(15) Even in the water area where the water plants wp are spread over a wide range, these water plants wp can be divided into two rows of row A nozzle group 77 and row B nozzle group 78, row A nozzle group 77 'and row B nozzle group Turbulence generated by the water jetted from the plurality of tube nozzles 10 which are sandwiched by and attached to each other at 78 'can be sprayed on the water grass wp. As a result, it is possible to collectively apply stress to the water plants wp that are overgrown over a wide range, and to suppress the growth of those water plants wp, so it is possible to improve the water environment.

As mentioned above, although this invention was demonstrated with reference to said each embodiment and each application example, this invention is not limited to said each embodiment and each application example.
The configuration and details of the present invention can be modified in various ways that can be understood by those skilled in the art. Further, the present invention also includes a combination of some or all of the configurations of the above-described embodiments, as appropriate.

For example, in the first embodiment, the water environment improving device 1 includes the fluid supply unit 20 including the pump 21, the water-bloom crushing and pressing device 39, and the pressure container 40 constituting the water-bloom crushing and pressure device 39. It is possible to cope with the water area in which both algal bloom a and aquatic plants wp grow, but it is not limited thereto.
The pressure vessel 40 and the first and second three-way valves 27 and 37 are not provided so that only the water grass wp can be handled, and a configuration provided with only the fluid supply means 20 including the pump 21, the nozzle holding pipe 11, and the tube nozzle 10 It may be

  In the first embodiment, the water is sucked from the suction hose 25 by the pump 21 and sent to the discharge hose 24 in the water area where the blue-green algae is not grown, but in the water area where the blue-green algae is growing Even if it is, the second three-way valve 37 may be switched to stop the water from the pressure container hose 44, and the flow as described above may be performed.

Furthermore, in the water environment improvement device 4 of the fourth embodiment, two rows of nozzle groups consisting of the A row nozzle group 77, the B row nozzle group 78, the A row nozzle group 77 'and the B row nozzle group 78' Although it is set as 2 steps, it does not restrict to this.
Among the nozzle groups of the two-stage configuration of the water environment improvement device 4, a single-stage configuration comprising two rows of A-row nozzle group 77 and B-row nozzle group 78, or A-row nozzle group 77 'and B-row nozzle group 78' It is good also as a water environment improvement device which consists of a nozzle group.
With such a configuration, it can be applied to a water area in which a large amount of aquatic plants wp are not covered with a simple configuration, and substantially the same effects as in (14) and (15) can be obtained. .

In addition, the water environment improvement device according to the above-described modification may be equipped with a sensor that senses the swing of the waterweed wp.
That is, the control in the water environment improving device according to the fourth embodiment and the modified embodiment uses a sequencer or the like to check the inclination of the water plants wp and the state of swinging back, to control the on time of the electromagnetic switching valve and the water flow. The pause time is set and controlled in advance.
However, in this control, even if the natural vibration of the aquatic plant wp changes due to the growth and proliferation of the aquatic plant wp and changes in water depth and flow, the same timing is maintained and controlled, so that the swing back can not be used successfully.

Therefore, in the water environment improvement device of the present modified embodiment, the movement of the water grass wp is sensed by a sensor, and the timing of the swing back is grasped in a timely manner to operate the electromagnetic switching valve.
Here, there are various conceivable sensing methods, but in this modification, the position of the water grass wp is detected by ultrasonic waves, a tilt sensor that is vibrated by the movement of the water grass wp, an acceleration sensor, a strain gauge, etc. One of the sensors is arranged.
And these sensors may be implemented by setting it in the vicinity of the aquatic plant wp in the structure of the simulated aquatic plant imitating the aquatic plant wp.

  In the water environment improving apparatus of such a modified embodiment, when water is alternately ejected from the plurality of tube nozzles of each nozzle group in a state where the water grass wp is sandwiched between the A row nozzle group and the B row nozzle group The wp shake is detected by the sensor, and the timing of the swing back can be performed in a timely manner, so it spouts water more efficiently and gives stress even to a large amount of flourishing water grass wp be able to. As a result, since the growth of those aquatic plants wp can be suppressed, the water environment can be improved.

In addition, the water environment improving device of the present invention may be added to the water flow generating and stirring device (Japanese Patent No. 4420452) taken up as the above-mentioned Patent Document 1.
That is, in the water flow generating and stirring apparatus of the above-mentioned patent publication 1, the surface water with a relatively high oxygen concentration is sucked and stirred into a low layer with a low oxygen concentration and a depth of 10 m or more. It is a mechanism to inactivate by light restriction.
At that time, it is necessary to circulate and stir as much water as possible with a limited amount of water, but when the water environment improving device of the present invention is added to the discharge port of such a conventional water flow generating device Since the stirring effect due to the self-excited vibration of the nozzle serving as the outlet is added, the amount of water that can be stirred can be significantly increased.

Also, in the conventional method of conveying surface water to the bottom layer by obtaining an upward flow by aeration and causing convection, in the case of a water area with a relatively large depth such as a reservoir, the air bubbles rise by aeration from the bottom. As a result, the bubbles collide with each other and coalesce to form a large bubble, which increases the rising velocity of the bubble, draws in the surrounding water to form a strong upward flow, and as a result, generates strong convection.
On the other hand, in the vicinity of the nozzle that ejects the bubbles, the drawn flow is generally steady, and the bubbles collide with each other so that they are easily coalesced. Therefore, the total surface area of the bubbles becomes smaller than the bubble volume, and the dissolution rate in water decreases. After all, the bubbles collide and coalesce, and when they grow too much, they break up into bubbles of a certain size distribution, so the force that causes convection is determined by the amount of gas sent.

  In order to increase the amount of dissolved oxygen, the life of fine bubbles will be extended or it will be spouted while stirring in water to reduce the chance of contact with other bubbles. In the former, micro bubbles are the mainstream, but if the life of the micro bubbles is too long, the effect of generating convection does not increase.

In the present invention, strong convective action can be generated because the nozzle is injected into the water while being self-oscillating and stirring, thereby reducing the chance of contact between the bubbles and not significantly inhibiting the combination of the bubbles that generate convection. it is conceivable that.
In addition, in the water area intended for aquatic plants, the water depth is generally shallow, so it is a structure that is inherently difficult to generate convection. Even so, the significance of performing aeration by force suctioning and stressing the water bloom near the water surface and applying it around the water bottom also means that the oxygen which is easy for zooplankton to grow and feed on the broken water bloom is large. The purpose is to create a water environment that is integrated.
Since it is advantageous that the bubbles for supplying oxygen are widely distributed since convection is not expected, the method in which the self-oscillating nozzles are scattered as in the present invention is a striking configuration.

  The water environment improvement device of the present invention can be used to improve the water environment by suppressing the growth of phytoplankton including blue-green algae and aquatic plants growing in stagnant places such as rivers.

1 Water environment improvement device (1st embodiment)
2 to 4 water environment improvement device (2nd to 4th embodiments)
10 Tube nozzle (self-oscillating vibrator)
11 Nozzle holding pipe (vibration body holding member)
13 holding member installation means 20 fluid supply means 21 pump 24 discharge hose 25 suction hose 27 first three-way valve 34 nozzle side water supply hose 39 group breaking and pressing means of water bloom 40 pressure vessel (water pressure pressurization mechanism)
41 Alga swarm shattering mechanism 42 Algae collection pipe 44 Pressure vessel hose 45 Water supply hose 47 Pressurized water discharge pipe 50 Fluid supply means (second embodiment)
51 tube pump 54 pressure tube for discharge 55 suction hose 57 in-line mixer 100 turbulence generator 101 vibrating grid wp water grass a water bloom
T turbulence J jet L laminar flow

Claims (7)

In an apparatus which is in an aqueous system where phytoplankton such as blue-green algae exists and which exerts a turbulent flow on the growing water area of the aquatic plant to cause stress on the aquatic plant to suppress the growth of the aquatic plant,
It is preferable that the means for giving turbulent flow is provided with a self-oscillating vibrator that vibrates by itself and generates turbulent flow by ejection of a fluid supplied from the outside, and a vibrator holding member for holding the self-oscillating vibrator. Water environment improvement device that features. In the water environment improvement device according to claim 1,
A water environment improvement apparatus characterized in that holding member installation means for setting the vibration body holding member in the growing water area of the water grass is connected to the vibration body holding member. In the water environment improvement device according to claim 1 or 2,
A water environment improvement device comprising: fluid supply means for supplying the fluid to the self-oscillating vibrator. In the water environment improvement device according to claim 3,
The fluid supply means,
A pump for sucking up the fluid from a water area containing the phytoplankton via a suction hose, a motor for driving the pump, a connection between the pump and the vibrator holding member, and vibration of the fluid from the pump What is claimed is: 1. A water environment improving device comprising: a discharge hose to be fed to a body holding member. The water environment improvement device according to any one of claims 1 to 4.
The self-oscillating vibrator is constituted by a tube nozzle and the vibrator holding member is constituted by a pipe member,
A water environment improvement device, wherein at least one tube nozzle is disposed on the pipe member. In the water environment improvement device according to claim 5,
A plurality of the pipe members are disposed to face each other, and the tube nozzle is provided to each of the pipe members,
A water environment improving device characterized in that the respective tube nozzles are provided with the fluid end jet ports of the respective tube nozzles facing each other, and the fluid is ejected from the respective tube nozzles with a time difference. The water environment improvement device according to any one of claims 1 to 5, wherein
It comprises a colony crushing / pressurizing means of the algae which collects and finely pulverizes the blue-green algae which is the blue-green algae together with a fluid,
The means of crushing and pressing the green algae colony,
A colony crushing mechanism of the blue-green algae, which rapidly changes the flow velocity of the fluid containing the blue-green algae, and finely pulverizes the colonies of the blue-green algae by an impulsive pressure change and a large shear force;
A water environment improving apparatus comprising: a water-bloom pressurizing mechanism for compressing the algae vacuole by pressurizing the water-bloom.

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