JP3186958B2 - Aeration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for improving water quality of a dam lake or the like and protecting a natural landscape and environment using an aeration apparatus and a vegetation floating island.

[0002]

2. Description of the Related Art Conventionally , water quality improvement in a dissolved oxygen deficiency state or an anaerobic state in a dam lake or the like is conventionally performed by an aeration device, and a resting place for restoration of a natural scenery and protection of wild birds or a spawning place for fish propagation. Alternatively, purification of water quality by absorption of nutrients by vegetation plants has been set up as a separate facility, such as improvement by installing vegetation floating islands.

[0003]

An aerator provided with an air diffuser in the water is a floating body for inspection and maintenance or a suspension just above the air diffuser if the air diffuser is of a water-bottom installation type using a sinking weight. If it is a type, a floating body for suspension is required, and an artificial floating body that is unbalanced with the natural scenery will float. This is even more so when it comes to several units.

[0004] In addition, vegetation floating island will block the sunlight of its location,
Phytoplankton, is not shed impeded the growth of zooplankton, precious gather food came the fish and the lack wins
Made on the ground. Also, reed and reed vegetation P in water nutrient, because it absorbs the N, growth of these vegetable flop <br/> Rankuton to nutrients is not shed zooplankton is suppressed to some extent. Also, the dam lakes have almost no water flow, the floating islands are moored and fixed by floating in still water, and the amount of nutrients absorbed by the aquatic plants vegetated on the vegetated floating islands is limited.

[0005] The present invention,Separate aeration equipment and vegetation floating island
It eliminates the disadvantages of the prior art,
Installed just below the vegetation floating island, a floating body dedicated to the aeration device is installed
Aggressive by using floating islands as floating bodies
Water flow hits the roots of vegetation plants and absorbs nutrients
And air bubbles from the aeration device
Fish are collected and the dissolved oxygen is high due to the aeration effect.
Vegetation on a floating islandThis
Environment with abundant zooplankton to feed
Is to produceEspecially the aeration of the aeration device
Is larger than the underside of Ukishima Make it easier for you to escape
So that it can be easily filled, or
To prevent the trachea from twisting.
You.

[0006]

In order to achieve the above object, according to the present invention, an air diffuser is provided in the water below the vegetation floating island, so that the upward flow of aeration hits the lower surface of the floating island, and the vegetation floating island is provided with a diffuser. It is also used as a floating body for inspection or as a floating body for suspending the air diffuser.
A space for air collection is provided in the center, and an exhaust pipe that leads to outside air is
Oh Ru provided so as to penetrate.

[0007] Further, the aerating device has a plurality of branch lines at the lower end and supports the diffuser tube with the branch lines, and the upper end of the suspension line is wound around a winch on a floating island, and is lifted and lowered to be supported. At the same time, a guide hardware that supports the air diffuser tube by the lower ends of a plurality of antirotation ropes whose upper ends are wound on a plurality of auto tension winches on the floating island and attaches the air supply pipe to the suspension cable so as to be able to move up and down. A guide pipe inserted into the pipe, a fixed portion fixed at a predetermined position in the air pipe at a predetermined interval,
One end is rotatably connected to a fixed part by a horizontal pin and the other end is fixed to a guide pipe. When the air diffuser tube is hoisted by a winch, the air supply tube is continuously connected to the center of the cable.
The anti-rotation rope may be wound by an automatic tension winch while being bent in a character shape.

In addition, the floating vegetation island is mounted on a frame body formed in a planar shape of the floating island, a floating body supporting the frame body at a predetermined position with respect to the water surface, and a frame body on which a diffuser tube suspension cable is wound and supported. A winch, the same number of auto-tension winches in which the upper ends of a plurality of diffuser tube rotation preventing ropes are mounted on a take-up frame, and a vegetation base material arranged on the frame and arranged to fill between the winches. It may be a floating vegetation island.

[0009]

[Function] When the compressed air for aeration is released into the water from the air diffuser of the aeration device , the bubbles rise while giving oxygen to the surrounding water ,
It expands according to the water pressure and joins the atmosphere. Also, to give rise energy water when the bubbles rise, increased water flow from the middle-deep rich nutrient occurs, diffusive flow slowly in four directions Shi those I dispersed expansion <br/> the floating island of Form. The dissolved oxygen containing a large amount diffusive flow slowly rich nutrient they give an appropriate water flow vegetation plants island periphery good good a Rashimeru absorption of water nutrient. Also, phytoplankton,
Hence occurrence of zooplankton also prompting, at the peripheral portion of the island becomes rich in zooplankton as a food fish, the diffusion flow of dissolved oxygen is large by aeration, together bubbles from diffusing tubes just for Slow diffusion current hits the roots of aquatic plants around the floating island, which is the spawning ground, and supplies enough oxygen to the eggs to create a favorable fish habitat.

[0010] Further, a large amount of air bubbles from the air diffuser rises one after another on the lower surface of the vegetation floating island, and it is necessary that the structure of the floating island is such that the large amount of air bubbles easily merge with the atmosphere. When the floating island has a frame supported on the water surface by a buoyant body (see FIG. 1), there is a space on the lower surface of the floating island and there is no problem. When the floating island has a frame supported at a predetermined depth below the surface of the water by a buoyant body, and has a winch for hoisting a diffuser tube and an auto tension winch for preventing rotation of a diffuser tube (see FIG. 3), The winch is supported above the surface of the water, with a space below it. Therefore, an aggregation of the air which has risen in the space is evacuated by providing a vent hole passing through the floating island from the space. At this time , a ventilation hole is appropriately provided between the upper portion of the beam member of the frame and the vegetation base material placed on the beam member so that air can be easily ventilated into the space below the winch. When the center of the frame of the floating island is above the water surface, the peripheral edge is formed at a predetermined depth in the water, and there is a space for collecting air at the center of the lower surface of the floating island (see FIG. 5) , the exhaust hole passes through the floating island. If provided, exhaust can be sufficiently performed.

[0011] In addition, since the aeration device is configured as described above, when the hanging cable of the diffuser tube is hoisted by a hoist for inspection and maintenance, the diffuser tube rises, and a guide metal member is attached to the hanging cable at appropriate intervals. The guided air line is continuous S from below.
It rises while bending in the shape of a letter, and is lifted below the floating island,
Furthermore, the extra length of the anti-rotation search diffusing pipe is wound in auto tension winch, easily inspected hand insertion. In addition , the air diffuser tube is not twisted during the air diffusion by the rotation preventing rope.

Further, by constructing the vegetation floating island as described above,曝<br/> air hung the air diffuser directly below the vegetation floating island can be performed, further, embedded between the respective winch the island
It can be configured as a vegetation floating island having a vegetation base material arranged in such a way that

[0013]

FIG. 1 is an overall front view showing an embodiment of the present invention, in which a diffuser pipe of an aerator is suspended from a floating vegetation island. In the figure , 1 is a vegetation floating island, 2 is a diffuser pipe of an aerator, 3 is an air supply pipe, a flexible hose made of rubber or the like, 4 is a hanging cable of the diffuser pipe, 5 is an anti-rotation cable, and an upper end is an auto tension winch on a frame body. It is wound around an auto tension winch housed in the chamber 21. 6 is a mooring line. Reference numeral 7 denotes a frame of the vegetation floating island 1, which is supported above the water surface by a buoyant body 8. Reference numeral 9 denotes a vegetation base material which is laid on the upper surface of the frame body and placed and fixed thereon, 10 is a water-absorbing material which is suspended from the vegetation base material 9 on the water surface, and 11 is a floating type aquatic plant vegetation area such as coconut fiber. Floats are appropriately inserted and placed in the vegetation base material to give buoyancy, and the upper and lower surfaces are wrapped in a net to make them flat,
It is planted with reeds and is connected to the outer edge of the floating island. Reference numeral 12 denotes a winch room accommodating a winch in which the upper end of the suspension cable 4 is wound up, and the floating island is moored to the bottom or shore by a plurality of mooring cables 6. Since this device suspends the air diffuser 2 from the floating vegetation island, it is suitable for a water area such as a dam lake where the water level fluctuates greatly.

In a lake with little water level fluctuation, an air diffuser may be installed at the bottom of the water, and a floating vegetation island may be moored (not shown) immediately above. Alternatively, suspended pipe 2 diffuser in search hanging vegetation floating island center of the lower surface, further, the predetermined depth moored via the one end of the sparger 2 attached to the sea bed of sinker in pull tether attached water floating pulley Then, the air diffuser 2 is locked, and a floating vegetation island is moored immediately above the air diffuser 2 . An example is shown in FIG. Numeral 13 is a sinker, numeral 14 is a pulley, numeral 15 is a hanging line for hanging at a predetermined water depth, numeral 16 is a pull-in mooring line, numeral 17 is an underwater floating body, and numeral 18 is a lifting line for checking a diffuser tube. The vegetation floating island 1 supports the frame 7 at a predetermined depth below the water surface by a buoyancy body 8, forms an aquatic plant vegetation area 11 on the outer periphery of the floating island, and forms a space 19 for collecting air on the central lower surface of the floating island. Is provided with an exhaust hole 20 communicating with the outside air.

[0015] Figure 3 is a part sectional front vegetation floating island showing an embodiment in which is supported below the water surface position by the buoyant body 8 arranged frame 7 vegetation island on the lower surface and the upper surface of the frame 7 FIG, 4 is a partially cut plan view of FIG. Diffuser 2
Since the aeration device including is similar to that of FIG. 1, it is a diagram showing only the vegetation floating island.

Reference numeral 21 denotes an auto-tension winch chamber containing an auto-tension winch 21a around which one end of the rotation preventing cable 5 of the diffuser tube 2 is wound, and reference numeral 12 denotes a winding accommodating a hoisting winch 12a of the suspension cable 4 of the diffuser tube 2. It is a fryer room. The expanded metal 22 is laid on the upper surface of the frame 7,
A net 23 for supporting the vegetation base material 9 is stretched thereon. The net 23 is also stretched on the buoyant body 8 on the upper surface side of the frame 7 . Vegetation base material 9 is installed frame 7 above the water surface just barely thin at the outer peripheral portion of the vegetation island, its <br/> root aquatic plants to grow is extended to floating island underside. 24 is a piping space for accommodating the air supply pipe 3 during inspection , and 25 is a passage. Vegetation base material
The net 23 is also stretched on the upper surface of 9 .

The bottom surface of the winch chamber 12 is supported above the water surface by support pieces 12b, and a space 19 is formed on the water surface. A space 19 is similarly formed below the auto tension winch chamber 21 and is used as a space for collecting air for aeration of the aerator. Exhaust hole communicating these spaces and the atmosphere is provided as appropriate. In addition, the air diffuser 2 is provided between each cell of the member 7a (see FIGS. 18 and 19) constituting the frame 7 .
More aeration accumulates, but in order to circulate through the space 19,
A ventilation hole may be appropriately provided in the upper part of the member 7a . Vent 2
FIG. 18 is a front view of a partial detail view of an example of FIG. 6, and FIG. 19 is a plan view thereof. In this example, the ventilation member 26a bent in a semi-cylindrical shape is welded to the flange of the frame member 7a (in this case, channel steel) to form the ventilation hole 26. Of course, a ventilation hole may be formed in the upper part of the channel steel web material.

[0018] Figure 5 is a front view of another embodiment of a vegetation floating island of aeration apparatus embodying the present invention shown to partially cut, Fig. 6 is a partially cut plan view. In the present embodiment, the frame 7 at the center of the floating island is higher than the water surface, and the space 1 for aeration and air collection is provided below the frame 7.
9 and the peripheral frame 7 is made lower than the water surface, so that the aeration from the air diffuser 2 of the aeration device can easily escape to the atmosphere from the lower surface of the floating island, and the aquatic plant vegetation area 11 around the floating island can be easily formed. It is a vegetation floating island that can be created. Reference numeral 20 denotes an exhaust hole. By forming the floating island in this way, the air diffuser 2
Besides Nogaseru easily air aeration to rise more, floating island can economically constructed lightweight, further, the aquatic plants vegetation zone 11 to help the absorption of nutrient can be easily formed on the floating island periphery.

[0019] FIG. 8 is a partially cut plan view shows the alternative embodiment of vegetation floating island of aeration apparatus embodying the present invention.
Figure 7 is a sectional view showing the A-A view of figure 8. This embodiment shows an embodiment in which the center of the floating vegetation island shown in FIG. 6 is hollowed out to form an annular floating island so that the aeration from the air diffuser 2 of the aeration apparatus can easily escape. Winch chamber 12 to raise winding to check hand insertion air diffusion pipe 2 is placed on the frame of the annular portion, but to name wound by attaching a pulley passes a beam or the like to the cavity of the central portion ( (Not shown), the air diffuser 2 can be easily pulled up to the center of the floating island, which is convenient for inspection and maintenance. In addition, the central portion of the vegetation floating island even if the vacant space, it can not be seen from the surroundings, the landscape on the visible on the green floating island also there is no supporting disabled <br/>. Further , since there is no central portion, the weight can be reduced accordingly, and the material is advantageous and economical.

[0020] FIGS. 9 and 10, in another embodiment of the annular floating island vegetation floating island of aeration apparatus embodying the present invention, FIG. 9,
The frame 7 is held at a predetermined depth below the water surface and the aquatic plant vegetation area 11
If was constructed to floating island periphery, FIG. 10 shows a case where the frame 7 has anchored the floating aquatic plants vegetation region 11 on the outer periphery of the floating island is held on the water surface a predetermined height. In each case, the air diffuser 2 of the aeration device is suspended below the central space.

FIG. 11 is a perspective view of an aeration apparatus embodying the present invention. Sparger 2 is locked in Edasaku 4a of the suspending member 4, the airline 3 diffusing rising from pipe 2, so come up to search 4 and mooring 6 hanging by a guide hardware 27 attached at appropriate intervals land compressor chamber Leads to. Anti-rotation cable 5
Connects the floating island and the air diffuser 2 in an intersecting manner. Figure 12 is a view to showing a state in frying up by hoist 12a the ropes 4 hanging for checking the sparger 2. The air supply pipe 3 is bent in a continuous S-shape and pulled up, so that inspection and maintenance can be easily performed at a shallow position. Distributed anti-rotation ropes 5 tracheal 2 is wound in the auto tension winch 21a on floating island by the amount of the diffusing pipe 2 out salvaged are extra length is always stretched at a constant tension.

FIG. 13 is a front view showing a state in which the diffuser tube 2 is suspended by a hanging cable 4, FIG. 14 is a plan view of the diffuser tube 2, and FIG.
5 is a detailed view of the guide hardware 27, (a) is a front view,
(B) is a side view, (c) is an AA view of (b). The guide hardware 27 is a guide pipe 27a, a U band 2
7b, a U-band mounting plate 27c, a connecting hardware 27d fixed to the guide pipe 27a , and a rotating pin 27e having a horizontal axis that rotatably connects the connecting hardware 27d and the U-band mounting plate 27c. A diffuser tube is provided by the guide hardware 27.
When the tube 2 is pulled up, the air supply pipe 3 is bent in a double-legged S-shape and pulled up.

[0023] FIG. 16, the aeration tube 2 of the header pipe 28
28a is a mounting flange of the air supply pipe 3, and 29 is a branch pipe. In FIG. 14, reference numeral 30 denotes an annular tube of the air diffuser 2 .
A blind plate 31 is provided in the middle of the branch pipe attachment part of the annular pipe 30,
Even if the air diffuser 2 is slightly inclined, the air is diffused evenly. 32
(See FIG. 13) is a weight attached to the branch pipe 29 of the air diffuser 2 . FIG. 17 is a diagram showing a cross section of the annular pipe 30 of the diffuser pipe 2 and showing an opened state of the diffuser holes 33.

[0024]

According to the present invention, an aeration tube type aeration device is provided immediately below a vegetation floating island, so that the ascending flow from the middle and deep layers rich in nutrients containing a lot of oxygen due to the aeration slowly diffuses from the center of the lower surface of the floating island to the four sides. Form a flow. This diffusion flow provides a suitable water flow to the vegetation plants on the periphery of the floating island and improves the absorption of nutrients in the water. Further, <br/> have shed phytoplankton is prompting the generation of zooplankton, the peripheral portion becomes rich in zooplankton as a food for fish, fish gathered by bubbles from diffusing tubes, further, The roots of the aquatic plants on the periphery of the floating island serve as spawning grounds, where they are exposed to slow diffusion currents and oxygen is sufficiently supplied to the eggs to create a favorable fish habitat. Further, the aquatic plants vegetation area of the peripheral portion of the vegetation island, and prompting the absorption of nutrients, promote improved lakes water quality, is sufficient flourish plant vegetation floating island, greening was prompting <br/>, environmental Also contributes to the beautification of. In addition, the floating body of the aeration apparatus is also used as the floating body of the aeration apparatus, so that the floating body of the aeration apparatus can be omitted, which has an economic effect.

In particular, according to the first aspect of the present invention,
The aeration that has gathered in the air collection space,
Can be easily evacuated from pores. The invention according to claim 2
According to this, it is possible to easily lift the air diffuser and air duct.
The inspection can be easily performed. Also, diffuse
The middle air diffuser does not twist. On the other hand, claim 3
According to the described invention, the air diffuser is suspended just below the floating vegetation island.
Aeration can be performed by lowering
Vegetation with vegetation base material arranged to fill the space between
It can be configured as a floating island .

[Brief description of the drawings]

FIG. 1 is an overall front view showing one embodiment of the present invention;

FIG. 2 is an overall front view showing another embodiment of the present invention;

FIG. 3 is a partially cut front view showing one embodiment of a vegetation floating island of the aeration apparatus of the present invention;

FIG. 4 is a partially cut plan view of FIG. 3;

FIG. 5 is a partially cut front view showing another embodiment of the vegetation floating island of the aeration apparatus of the present invention;

FIG. 6 is a partially cut plan view of FIG. 5;

FIG. 7 is a cross-sectional view showing an embodiment of a vegetation circular floating island of the aeration apparatus of the present invention;

8 is a partially cut plan view of FIG. 7;

FIG. 9 is a cross-sectional view showing another embodiment of the vegetation circular floating island of the aeration apparatus of the present invention;

FIG. 10 is a cross-sectional view showing still another embodiment of the vegetation circular floating island of the aeration apparatus of the present invention;

[11] an overall perspective view showing an embodiment of the aeration device of the present invention,

FIG. 12 is an explanatory view showing a state in which the air diffuser is being lifted;

FIG. 13 is a front view showing a state in which the air diffuser is suspended,

FIG. 14 is a plan view of a diffuser tube;

FIG. 15 is a detailed view of a guide hardware , (a) is a front view,
(B) is a side view, (c) is an AA view of (b),

FIG. 16 is a front view of a header pipe,

FIG. 17 is a cross-sectional view of an annular tube of an air diffuser.

FIG. 18 is a front view showing an example of a ventilation hole.

FIG. 19 is a plan view of FIG. 18;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vegetation floating island 2 Air diffuser 3 Air supply pipe 4 Suspension line 5 Anti-rotation line 6 Mooring line 7 Frame 8 Buoyancy body 9 Vegetation base material 11 Aquatic plant vegetation area 12 Winch room 13 Sunk weight 19 Air collection space 20 Exhaust hole 21 Auto Tension winch chamber 26 Vent hole 27 Guide hardware 28 Header pipe 29 Branch pipe 30 Ring pipe 31 Blind plate

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Norio Hatano 2-176, Toshima-minami, Ikeda-shi, Osaka Zenia Marine Service Co., Ltd. (56) References JP-A-7-148499 (JP, A) Hei 8-130998 (JP, A) Japanese Utility Model Showa 62-103500 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C02F 3/06 C02F 3/32

Claims (3)

(57) [Claims] 1. A when under water vegetation island Ru provided air diffuser
In both cases, a space for air gathering is provided in the center of the lower surface of the vegetation floating island,
An aeration apparatus characterized in that an exhaust hole communicating with the air is provided through the floating island . 2. The aeration device according to claim 1, wherein the aeration device has a plurality of branch lines at a lower end, and the upper end of a suspension line supporting the diffuser tube with the branch lines is wound around a winch on a floating island. The air diffuser is supported by the lower ends of a plurality of anti-rotation ropes whose upper ends are wound around a plurality of auto tension winches on the floating island, and the air supply pipe is movable up and down on the suspension rope. A guide pipe with a hanging cable inserted into the pipe, a fixed part fixed at a predetermined position on the air supply pipe at a predetermined interval, and one end rotatably connected to the fixed part with a horizontal pin and a guide at the other end. It consists of a rotating part fixed to the pipe, and when the air diffuser pipe suspension rope is hoisted by a winch, the air supply pipe is bent continuously in a S-shape around the suspension rope center, and the extra length of the rotation prevention rope is wound up by the auto tension winch. Exposure characterized by Apparatus. 3. The aeration apparatus according to claim 1, wherein the floating vegetation island is formed into a planar shape of the floating island, a floating body for supporting the frame body at a predetermined position with respect to the water surface, and a diffuser pipe hanging rope is wound up. Winches mounted on the supported frame, the same number of auto-tension winches mounted on the winding frame with the upper ends of a plurality of diffuser tube antirotation ropes, and placed on the frame to fill the space between each winch A floating device comprising a vegetation floating island composed of vegetation base materials arranged in such a manner.