JPH0659144B2 - Fry breeding facility - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention is intended to maintain a proper environment for the growth environment of bivalve molluscs such as clams and clams, that is, in the middle stage of the growing process. It is related to training facilities.

《Prior art》 As a method for artificially growing bivalves, in the past, mainly seedling-produced larvae were cultivated indoors to a shell length of about 2 mm. It was a method of releasing it to a breeding ground in the sea area and letting it grow under the natural conditions until it grows to an adult.

According to this method, since the shell length is released to the natural world with a small shell length, the growth of the shellfish is hindered by waves and sediment, the survival rate becomes 1% or less, and the production amount of adult shellfish could not be expected.

Therefore, a technique has been developed in which a part of the sea area is surrounded by nets, or a plurality of tubs that are suspended from the sea and lined with sand, which is a growing bed, are lined up for intermediate growing of juveniles.

<Problems to be solved by the invention> However, any of these technologies is not much different from the natural conditions and is also affected by waves, and there are adverse effects due to driftwood, algae, dust, etc. in the sea area and the tide level. Due to the difference, the sludge that had entered the inside of the equipment or container accumulated on the sand and deteriorated the bottom sediment, which hindered the growth of the shellfish and did not grow sufficiently.

The present invention is a growing facility suitable for growing juveniles that have little influence of waves, can quickly remove floating mud, etc. to keep the bottom fresh, and do not have an excessive rise in water temperature during the heat. The purpose is to provide.

<< Means for Solving the Problem >> In order to achieve the above object, the present invention is directed to an outer wall formed on an original ground in which the ground surface is exposed and concealed by a tide difference and a floor laid on the inner bottom surface of the outer wall. A pool part for breeding juveniles consisting of sand, and a water tank that is placed adjacent to this pool part and has an outer wall that is higher than the pool part and that stores seawater that is introduced when the tide rises, and the tide level of the pool part A water supply pipe having one end opening into the water storage tank and being piped to the pool portion for supplying seawater in the water storage tank to the pool portion when the water level falls below the outer wall ceiling, and the tide level is the outer wall ceiling. A float valve that opens and closes the opening of the water supply pipe by detecting a drop from the end through buoyancy and operating a valve member arranged in the water tank.

<Operation> Seawater that enters the facility due to the rise in tide level during low tide to high tide enters the pool section and storage tank for rearing larvae and is stored in each section. When the tide level drops near the top of the pool, the float valve operates, the opening of the water supply pipe located inside the water tank is opened, seawater is supplied from the water tank to the pool through the water supply pipe, and the juvenile shellfish at low tide. It prevents the bed from drying up and prevents the water temperature from rising in the summer, and the floating mud on the juvenile bed is discharged to the outside of the pool along with the seawater through the overflow weir due to overflow.

Water waves are received by the water tank located offshore, so the effects of waves on the pool are mitigated.

<< Embodiment >> An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1 and FIG. 2, 1 is a pool part which becomes a breeding ground for juveniles, and 2 is a water tank integrally constructed adjacent to the offshore side of the pool part 1. The pool portion 1 and the water storage tank 2 are integrally formed of reinforced concrete,
Original ground E such as a beach where the ground is exposed and hidden by the tide level
It is constructed through the foundation stone masonry 3 above.

The pool portion 1 has a flat plate shape, and the outer wall 1a thereof is located at a position one step higher than the original ground, and the center is partitioned by a partition wall 1b. Further, an overflow weir 3 is formed in the upper portion of the outer wall 1a at a predetermined interval so as to discharge the overflowed seawater therethrough.

The outer wall 2a of the water storage tank 2 is formed to be higher than the outer wall 1a of the pool portion 1, the center is further partitioned by a partition wall 2b, and the partition wall 2b is communicated through a water inlet 4 opened at a lower portion of the partition wall 2b.

The height of the outer wall 2a is lower than or equal to the sea level HWL at high tide, and is set to a height at which it is covered with seawater.

The outer walls 1a and 2a are surrounded by abandoned masonry 5, and the outer surface of the abandoned masonry 5 is covered with a covering stone 6.

Below the abandoned masonry 5, a sand plate 7 is provided in the ground E.
Are arranged to prevent scouring of the abandoned masonry 5. It also serves the purpose of reducing the lifting pressure due to waves on the water tank and pool. A plurality of seawater intakes 8 are opened in the outer wall 2a and the bottom plate of the water storage tank 2.
A check valve 9 shown in FIG. 3 is attached to the pipe 1, which takes in the seawater filtered through the abandoned masonry 5 due to the rise in the tide level, and retains the taken in seawater even when the tide level falls.

The check valve 9 is a cylindrical case 9a fitted to the intake 8, a plate 9b fitted to the outside of the case 9a, a valve seat 9c provided inside the case 9a, and this valve seat. It is composed of a float type valve body 9d facing to and separable from 9c.
When the liquid level inside the valve is higher than the outside, the valve body 9d
Close c and store seawater inside.

As shown in FIG. 4, the lower side water supply pipe 10 is provided at the bottom of one of the insides of the pool section 1 which is partitioned by the partition wall 1b.
Is covered with a porous plate 11 covering the water supply pipe 10,
Sand 12 forming a juvenile bed on top of this porous plate 11
Further, an upper side water supply pipe 14 is laid on the sand 12 at a predetermined interval.

In addition, as shown in FIG. 5, sand 12 that directly constitutes a juvenile bed is spread inside the other part partitioned by the partition wall 1b of the pool part 1, and water is supplied to the upper side at a predetermined interval above the sand 12. Only the pipe 14 is connected.

Each of the water supply pipes 10 and 14 is provided with a spout at an appropriate location, and the other end of the water supply pipes 10 and 14 is opened in the water storage tank 2, and this opening is opened and closed by a float valve 15 described later. It is supposed to be done.

That is, the float valve 15 releases the valve member arranged in the water storage tank 2 when the tide level is lower than the top of the outer wall 1a of the pool portion 1 at low tide, and its detailed structure is shown in FIG. It is shown.

In the figure, a hinge portion 15a is provided on the outer wall 2a of the water tank 2.
A lever 15b swingably supported is provided on the lever 1b.
At both ends of 5a, a valve ball 15d and a float ball 15e are suspended via chains 15c.

The valve ball 15d as a valve member faces the water supply valve 15f as an opening provided at the end of the water supply pipe 10 (14), and the float ball 15e is arranged in the sea or outside the outer wall 2a, and both of them are arranged. It is surrounded by a cylindrical guide 15g.

The float balls 15e are heavier and have a smaller specific gravity than the valve balls 15d. Therefore, when the sea level rises, the valve ball 15d lowers due to the difference in force to close the water supply valve 15f, while
When the sea level drops below a predetermined water level, that is, the water level near the top of the outer wall 1a of the pool section 1, the float balls 15e are exposed to the sea and the buoyancy acting on the float balls 15e decreases. Rises, water valve 1
Open 5f.

Further, the pool portion and the upper openings of the water storage tank 2 are covered with a net 16 such as a fish net, and the peripheral edge of the net 16 is fixed on the coating stone 6. This net 16 prevents the invasion of sea lettuce, driftwood, and other suspended matter when the entire facility is submerged, and creates an appropriate shade at low tide. Reference numeral 17 denotes an upper water supply pipe and its supporting beam, and also a supporting beam for the net 16, which prevents the net 16 from hanging down.

In the above configuration, seawater that enters the facility due to the rise in tide level during low tide to high tide enters the pool section 1 and the water storage tank 2 and is stored in each section.

On the other hand, when the tide level is lowered to the vicinity of the top end of the outer wall 1a of the pool section 1, the valve 15 is opened and the water supply pipes 10 and 14 are opened.
The seawater is supplied from the water tank 2 to the pool section 1 through the water, and prevents the sand 12 constituting the juvenile shell bed from being dried up at the time of low tide. Discharge.
In addition, the lower side water supply pipe 10 has a great effect of lifting the floating mud. Further, the upper side water supply pipe 14 has a high aeration effect.

The volume of the water tank 2, the pipe diameters of the water supply pipes 10 and 14, the amount of water supply, etc. are set so that the water supply action continues until the tide level exceeds the top of the outer wall 1a of the pool portion 1 again.

Further, since waves and the like are received by the high-level water tank 2 located offshore, the influence of waves on the pool section 1 is reduced. Further, the suspended matter is removed by the net 16.

Furthermore, in the above-mentioned breeding facilities, for example, in the case of a clam, it is suitable as a sea intermediate breeding facility for growing 2-5 mm size juveniles grown on land to 5-10 mm size. It has been reported that the yield of shellfish released is 42% or more, and that of 10mm or more is 90% or more.

<Effects of the Invention> As described in detail with reference to the above examples, in the juvenile shellfish breeding facility according to the present invention, there is little influence of waves, etc. Since it can be kept at, and there is no excessive rise in water temperature in the heat, it is possible to give suitable conditions for growing juveniles,
It is suitable as a facility for stable production of edible bivalves. Further, according to the present invention, since the sludge in the facility is removed by utilizing only the tide difference, the management is easy and the running cost is low.

[Brief description of drawings]

FIG. 1 is a sectional explanatory view showing a fry shell growing facility according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a detailed explanatory view of a check valve.
4 and 5 are partially enlarged sectional views of the pool portion, and FIG. 6 is a detailed explanatory view of the float valve. 1 ... Pool portion for fry shelling 1a ... Outer wall 2 ... Water storage tank 2a ... Outer wall 10,14 ... Water supply pipe, 12 ... Bed sand composing fry bed 15 ... Float valve, 16 ……Net

 ─────────────────────────────────────────────────── ─── Continuation of front page (71) Applicant 999999999 Komatsu Construction Co., Ltd. 3-5-4 Shiba Park, Minato-ku, Tokyo (71) Applicant 999999999 1-16 14 Shibuya, Shibuya-ku, Tokyo No. (71) Applicant 999999999 Toa Construction Industry Co., Ltd. 5 Yonbancho, Chiyoda-ku, Tokyo (71) Applicant 999999999 Japan Tetrapod Co., Ltd. 2-7-1 Nishishinjuku, Shinjuku-ku, Tokyo (71) Applicant 999999999 Mitsui Shipbuilding Co., Ltd. 5-6-4 Tsukiji, Chuo-ku, Tokyo (71) Applicant 999999999 Wakatsuki Construction Co., Ltd. 1-4-7 Hamacho, Wakamatsu-ku, Kitakyushu-shi, Fukuoka (71) Applicant 999999999 Bridgestone, Tokyo Central 1-10-1, Kyobashi, Ku (72) Inventor Seiichi Hosono 2-3, Kandajicho, Chiyoda-ku, Tokyo Obayashi Tokyo Book Co., Ltd. (72) Inventor Fumio Kaneko 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Yoshitaka Omori 1-1-7 Toyosu, Koto-ku, Tokyo Onoda Cement Co., Ltd. (72) Inventor Mitsuru Mimura 1-8-10 Azabudai, Minato-ku, Tokyo Komatsu Construction Co., Ltd. (72) Inventor Yukio Oami 1-1-16 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Hideo Ogino 5 Toban Construction Industry Co., Ltd. 4 Yoncho, Chiyoda-ku, Tokyo (72) Inventor Yuji Noguchi 2-7-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Within Japan Tetrapod Co., Ltd. (72 ) Inventor Shoji Tsumaya 5-6-4 Tsukiji, Chuo-ku, Tokyo Mitsui Shipbuilding Co., Ltd. (72) Inventor Kunio Funada 2-23-18 Shimomeguro, Meguro-ku, Tokyo Wakatsuki Construction Co., Ltd. ( 72) Inventor Shinji Morimura Bridgestone Co., Ltd. 1 Kashio-cho, Totsuka-ku, Yokohama-shi, Kanagawa

Claims (1)

[Claims] 1. A fry shell breeding pool section comprising an outer wall formed on a ground surface in which the ground surface is exposed and concealed by a tide difference, and a bed sand laid on the inner bottom surface of the outer wall, and this pool section. And a water tank that has an outer wall that is higher than the pool part and that stores the seawater that is introduced when the tide rises, and a seawater inside the water tank when the tide level is lower than the top of the outer wall of the pool part. A water supply pipe for supplying water to the pool portion, one end of which opens into the water storage tank and which is piped to the pool portion, and a water tank which detects that the tide level is lower than the top of the outer wall through buoyancy. A fry breeding facility comprising: a float valve that opens and closes the opening of the water supply pipe by operating a valve member disposed therein.