JPH0621332Y2 - Oxygen lump prevention device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is intended to prevent generation of anoxic water mass (blue tide) which causes death of fish and shellfish in the ocean and lakes. The present invention relates to a prevention device.

[Conventional technology]

In the oceans and lakes, when fish and shellfish and plankton die and accumulate on the bottom of the water, oxygen in the water is consumed in the process of decomposition of the dead fish and shellfish and plankton, so that a hypoxic water mass occurs near the bottom of the water. The place where the oxygen-deficient water mass occurs is a place where the water is not normally exchanged by waves or water currents, such as a recess in the bottom of the water.

After fish and shellfish and plankton died and accumulated on the bottom of the water,
It takes a considerable amount of time for the oxygen-deficient water mass to occur,
By exchanging water, it is possible to prevent the generation of oxygen-poor water mass.

Conventionally, as means for preventing the generation of oxygen-deficient water mass near the bottom of the water, (1) connect one end of the air supply pipe to a pedestal on the water or a compressor installed on the ground, and the other end of the air supply pipe Is arranged near the bottom of the water, high-pressure air is ejected from the compressor to the vicinity of the bottom of the water through an air supply pipe, and an ascending air current is generated, and the ascending air current disturbs the water.
(2) As disclosed in Japanese Utility Model Laid-Open No. 58-178396, the lower end of the flexible water pipe is connected to the submersible pump installed on the bottom of the water, and the upper part of the flexible water pipe is connected. A method in which a float and a sprinkling nozzle are attached, and water at the bottom of the water is pumped through a flexible water pipe by an underwater pump and jetted from the sprinkling nozzle, (3) a method in which tidal current is guided to a predetermined place by a dike It has been known.

[Problems to be solved by the device]

In the case of the above methods (1) and (2), the power cost becomes extremely high.
Further, in the case of the method of (3) above, since a considerably long dike is required, the construction cost is significantly high, and the diversion dike mainly induces surface water, and It is difficult to promote the flow of water on the side, and it is not suitable for locations where there is no tidal current or where tidal current is slow.

An object of the present invention is to provide a device that can generate a water flow by utilizing a tidal current and prevent generation of anoxic water mass without requiring high power cost and a large amount of construction cost. It is a thing.

[Means for Solving the Problems]

In order to achieve the above object, in the device for preventing generation of oxygen-deficient water lumps of the present invention, the hollow box-shaped structure 1 is fixed to the water bottom ground 12 at the place where the generation of oxygen-deficient water lumps is expected, and the hollow box-shaped structure The upper part of the object 1 is arranged above the water surface 2 at the time of high tide, and the opening / closing valve 5 is provided in the intake / drainage port 4 provided in the lower part of the side wall 3 of the hollow box-shaped structure 1. The opening / closing drive device 19 fixed to the object 1 and the opening / closing valve 5 are connected via a transmission mechanism and an opening / closing operating rod 17 so as to generate a moving water flow of water itself.

Further, the hollow box-shaped structure 1 is fixed to the water bottom ground 12 at the place where the hypoxic water mass is expected to occur, and the upper part of the hollow box-shaped structure 1 is arranged above the water surface 2 at high tide. A check valve 9 for preventing permissible intake of water is provided at an intake 6 provided at a lower portion of a side wall 3 of the shaped structure 1, and a drain port 10 is provided at the side wall 3 below a water level 2 at high tide. A drainage allowance check valve 11 is provided at the drainage port 10 thereof.
The above-mentioned object can be achieved also by providing.

[Operation] When transitioning from low tide to high tide, the water on the water bottom side is automatically taken into the hollow box-shaped structure 1 through the intake / exhaust port 4 or the intake port 6 due to the difference in tide level. At high tide, the water in the hollow box-shaped structure 1 is automatically discharged to the outside of the hollow box-shaped structure 1 through the intake / drainage port 4 or the drainage port 10.

〔Example〕

 Next, the present invention will be described in detail with reference to the illustrated example.

FIG. 1 and FIG. 2 show a first embodiment of the present invention, in which the water bottom ground 12 at the place where the oxygen-deficient water mass is to be generated,
The lower part of the hollow box-shaped structure 1 made of concrete or steel is embedded and fixed, and the upper part of the hollow box-shaped structure 1 projects above the water surface 2 at high tide and the side wall 3 of the hollow box-shaped structure 1 An intake / drainage pipe 13 extending laterally at a level slightly higher than the water bottom is pierced and fixed to the lower part of the above, and the inside of the intake / drainage pipe 13 constitutes the intake / drainage port 4.

A screen 14 for preventing intrusion of solid solid matter is attached to the outer end of the intake / drain pipe 13, and the hollow box-shaped structure 1
A ventilation hole 16 is provided in the upper surface plate 15 of the above, and an opening / closing valve 5 composed of an elevation gate for opening / closing the intake / drainage port 4 can be raised and lowered at the end of the intake / drainage pipe 13 in the hollow box-shaped structure 1. The lower end of the vertically opened and closed operating rod 17 is connected to the open / close valve 5, and the upper portion of the operating rod 17 is penetrated by the top plate 15.

A support frame 18 fixed to the upper surface of the hollow box-shaped structure 1 is provided with a drive device 19 for opening and closing, which is an electric motor with a reduction gear.
Is fixed, a guide roller 20 for guiding the upper part of the opening / closing operating rod 17 is attached, and a battery 21 for supplying electric power to the electric motor is housed in a support frame 18 and is opened / closed by the opening / closing drive device 19. The rotated pinion 22 is meshed with a rack 23 integrally provided on the upper end of the opening / closing operating rod 17, and when the opening / closing driving device 19 is operated in forward or reverse rotation, the opening / closing operating rod 17 is opened. The opening / closing valve 5 is moved upward or downward via the opening / closing valve 5 to open / close the intake / outlet port 4.

On the outside of the side wall 3 of the hollow box-shaped structure 1, there is fixed a trap 24 extending from near the water surface 8 at low tide to a level slightly above the upper surface of the hollow box-shaped structure 1, and A safety fence 25 is fixed around the upper surface of the structure 1, and the upper surface of the hollow box-shaped structure 1 is used as a fishing stand, an observation stand, a signal stand, a playground, or the like.

In the oxygen-deficient water mass generation preventing apparatus according to the first embodiment, the on-off valve 5 closed at low tide is opened at the time of transition from low tide to high tide, so that the water levels inside and outside the hollow box-shaped structure 1 are at the same level. Until, water on the water bottom side outside the hollow box-shaped structure 1 enters the hollow box-shaped structure 1 through the intake / drainage port 4, a water flow is generated on the water bottom side.

Next, when the water levels inside and outside the hollow box-shaped structure 1 become the same (desirably at high tide), the on-off valve 5 is closed to wait for low tide, and at the low tide, the on-off valve 5 is opened. Since the water in the hollow box-shaped structure 1 flows out to the outside of the hollow box-shaped structure 1 through the intake / discharge port 4 due to the head of water due to the difference in tide level, the water flow to the bottom side outside the hollow box-shaped structure 1 Occur.

When the water levels inside and outside the hollow box-shaped structure 1 reach the same level, the opening / closing valve 5 is closed to prepare for the next high tide, and the same opening / closing operation of the opening / closing valve 5 is repeated thereafter.

The power required in the case of the first embodiment is only the power required to open and close the open / close valve 5, and the water flows into the hollow box-shaped structure 1 and the water flows out from the hollow box-shaped structure 1. Is carried out by utilizing the tidal difference energy, so it consumes less power and is economical.

In the case of the first embodiment, the tide table is used to grasp the high tide and low tide times in advance, and the open / close valve 5 is linked with the computer.
You can drive unmanned by opening and closing. A battery using sunlight may be used as a power source for driving the opening / closing drive device 19.

FIG. 3 shows a second embodiment of the present invention, in which a plurality of anchor members or embedded support members 26 such as piles are driven in the water bottom ground 12 at the place where the oxygen-poor water mass occurs, and a hollow box shape is formed. The bottom of the structure 1 and each embedded support member 26 are connected via a flexible connecting member 27 such as a chain or a wire rope, and one end of a plurality of mooring lines 28 is provided around the upper portion of the hollow box-shaped structure 1. The other end of the mooring line 28 is connected to an anchor (not shown) that is locked to the submarine ground, and the flap is attached to the end of the intake / exhaust pipe 13 in the hollow box-shaped structure 1. The upper part of the on-off valve 5 composed of a gate is rotatably attached, and the opening / closing drive device 19 for rotating the on-off valve 5 is fixed to the end of the intake / exhaust pipe 13 or the hollow box-shaped structure 1. , Other configurations and opening / closing drive device 19 Closing timing of the valve closing 5 are the same as in the first embodiment.

FIG. 4 and FIG. 5 show a third embodiment of the present invention, in which the lower portion of the side wall 3 of the hollow box-shaped structure 1 is
An intake pipe 29 extending laterally at a level slightly higher than the bottom surface of the water is fixed through the intake pipe 29, and the inside of the intake pipe 29 constitutes the intake port 6 and the end of the intake pipe 29 in the hollow box-shaped structure 1. A check valve 9 for preventing water intake and drainage, which is composed of a flap gate, is rotatably attached to the upper part of the section by a horizontal shaft 33, and extends laterally above the side wall 3 at a level lower than the water level 2 at high tide. The drainage pipe 34 is fixed through, and the inside of the drainage pipe 34 constitutes the drainage port 10. Further, outside the hollow box-shaped structure 1, the drainage allowance reverse structure including a flap gate is provided above the end of the drainage pipe 34. Stop valve 11
Is rotatably attached by a horizontal shaft 35, but other configurations are the same as in the first embodiment.

In the case of the first and second embodiments, as shown in FIG. 6, the intake / drain pipe 13 is a hollow box-shaped structure 1 having a rectangular cross section.
May be provided on each side wall 3 of the
3 may be provided on the two side walls 3 or the three side walls 3 of the hollow box-shaped structure 1.

In the case of the third embodiment, the intake pipe 29 and the drain pipe 34 are connected to the side walls 3 of the hollow box-shaped structure 1 having a rectangular cross section.
May be provided.

In the case of implementing the present invention, the hollow box-shaped structure 1 may be made of a composite material of a plurality of materials such as concrete, steel and FRP, and the hollow box-shaped structure 1 has a square cross-sectional shape. It may be rectangular or circular.

A rotary actuator or any other driving device may be used as the opening / closing driving device for opening / closing the opening / closing valve 5. Further, an intake valve provided at the lower part of the side wall 3 is provided with an opening / closing valve which is opened by an opening / closing drive only during a period from low tide to high tide, and a drain port provided on the side wall 3 near the water level at low tide is provided with a low tide. An opening / closing valve may be provided which is opened only by the opening / closing drive device only occasionally.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

At the time of transition from low tide to high tide, the water on the water bottom side is automatically taken into the hollow box-shaped structure 1 through the intake / discharge port 4 or the intake 6 due to the difference in tide level, and at the time of high tide, it is a hollow box type. Since the water in the structure 1 is automatically discharged to the outside of the hollow box-shaped structure 1 through the intake / drainage port 4 or the drainage port 10, high power cost and large construction cost are not required,
A tidal current can be used to generate a water flow to prevent generation of anoxic water mass, and the upper surface of the hollow box-shaped structure 1 is used as a fishing table, an observation table, a signal stand or a playground. be able to.

Further, since the hollow box-shaped structure 1 is fixed to the water bottom ground 12, it is possible to effectively use the tidal difference to prevent the generation of oxygen-deficient water mass, and furthermore, the hollow box-shaped structure 1 The water discharged from the water stirs the water of the ocean and lakes,
It is possible to prevent the generation of oxygen-deficient water masses near the bottom of the water, and the moving water flow is generated during the high tide and low tide of the day, so compared to the case of releasing air into the water by waves. Thus, even when there is no wave, it is possible to prevent the generation of a poor oxygen water mass by generating a water flow near the bottom of the water.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a vertical sectional side view of an oxygen-deficient water mass generation preventing device, and FIG. 2 is an opening / closing valve by an opening / closing drive device. It is a vertical side view showing an up-and-down moving device. FIG. 3 is a vertical sectional side view showing a device for preventing generation of a poor oxygen water mass according to a second embodiment of the present invention,
4 and 5 show a third embodiment of the present invention, wherein FIG. 4 is a vertical side view of the oxygen-deficient water mass generation preventing device, and FIG. 5 is an enlarged view of the intake part and the drain part. FIG. FIG. 6 is a cross-sectional plan view showing an example in which intake and drainage pipes are provided on all side walls of a hollow box-shaped structure. In the figure, 1 is a hollow box structure, 2 is the water level at high tide,
3 is a side wall, 4 is a water intake / discharge port, 5 is an opening / closing valve, 6 is a water intake, 8
Is the water level at low tide, 9 is a check valve for preventing permissible drainage, 10
Is a drain port, 11 is a drain check valve, 13 is a drainage pipe, 1
6 is a ventilation hole, 17 is an opening / closing operating rod, 19 is an opening / closing drive device, 20 is a guide roller, 22 is a pinion, 23 is a rack, 25 is a safety fence, 26 is an embedded support member, and 27 is a flexible connecting member. 28 is a mooring line, and 29 is an intake pipe.

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 999999999 Taiyo Kogyo Co., Ltd. 4-8 Kikawahigashi, Yodogawa-ku, Osaka-shi, Osaka (71) Applicant 999999999 Toyo Construction Co., Ltd. 4-chome, Koraibashi, Chuo-ku, Osaka-shi, Osaka No. 1 (71) Applicant 999999999 Fujita Co., Ltd. 4-6-15 Sendagaya, Shibuya-ku, Tokyo (71) Applicant 999999999 Fudo Construction Co., Ltd. 4-2-16 Hirano-cho, Chuo-ku, Osaka-shi, Osaka (72) ) Tadaharu Inoue 1-4-36 Takamihara, Kukizaki-cho, Inashiki-gun, Ibaraki Prefecture (72) Hideaki Sato 3-10-10-508 Kita-Shinjuku, Shinjuku-ku, Tokyo

Claims (2)

[Scope of utility model registration request] 1. A hollow box-shaped structure (1) is fixed to a water bottom ground (12) at a place where a hypoxic water mass is expected to occur, and an upper part of the hollow box-shaped structure (1) is arranged above a water surface (2) at high tide. ,
An opening / closing valve 5 is provided at an intake / drainage port 4 provided at a lower portion of a side wall 3 in the hollow box-shaped structure 1, and an opening / closing drive device 19 fixed to the hollow box-shaped structure 1 and the opening / closing valve 5 are provided. Is a device for preventing generation of a poor oxygen water mass, which is connected via a power transmission mechanism and an operating rod 17 for opening and closing, and is configured to generate a moving water flow of water itself. 2. A hollow box-shaped structure 1 is fixed to a water bottom ground 12 at a place where an anoxic water mass is expected to occur, and an upper part of the hollow box-shaped structure 1 is arranged above a water surface 2 at high tide. ,
The hollow box-shaped structure 1 is provided with a check valve 9 for preventing water intake and drainage at an intake 6 provided at a lower portion of the side wall 3, and the side wall 3 is drained at a position lower than the water level 2 at high tide. An oxygen-deficient water lump generation preventing device having a port 10 and a drainage allowance check valve 11 provided at the drainage port 10.