JPH0319724Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a culture tank for shellfish, and more particularly, to an improvement of a partition plate for a culture tank.

[Background technology] Conventionally, the most common aquaculture tanks have been those using earthen ponds, concrete, wood, stainless steel, etc. However, these conventional aquaculture tanks are not necessarily lightweight and inexpensive. It was not something that could be manufactured immediately. Moreover, shellfish belonging to gastropods such as snails and abalone have fleshy flesh that sticks closely to the tank walls, so bacteria and parasites are particularly likely to breed on shellfish in earthen ponds and concrete culture tanks, making it extremely difficult to maintain food hygiene. This could easily lead to undesirable situations. Therefore, aquaculture tanks were sometimes manufactured using synthetic resin such as polyvinyl chloride, which is known to be a strong material, but in this case, although the growth of bacteria etc. was suppressed, it was difficult to process and mold the aquaculture tank. Plasticizers, which are inevitably included in polyvinyl chloride and other materials during processing, are eluted into water, and the eluted plasticity is absorbed by shellfish, causing a new situation that is unfavorable in terms of food hygiene.

Furthermore, with conventional aquaculture tanks, there are cases in which there is no means for supplying oxygen into the water, or even if there is a means for supplying oxygen to the water, oxygen may not be sufficiently distributed throughout the aquaculture tank, resulting in problems for shellfish. Sometimes there was a lack of oxygen.

[Purpose of the invention] The purpose of the invention is to provide a shellfish culture tank that can culture shellfish that are excellent in terms of food hygiene, is favorable for the growth of shellfish, and can be made lightweight and inexpensive. It is about providing.

[Structure of the invention] Therefore, the present invention aims to achieve the above object by making it possible to process and mold a robust aquaculture tank without using a plasticizer by using fiber-reinforced thermoplastic resin as the material for the tank wall. That is. In addition, oxygen can be supplied into the water by forming a plurality of small holes in the corrugated partition plate through which bubbles are generated as the water flows. Note that the shellfish mentioned here mainly refers to shellfish belonging to gastropods such as snails and abalone.

[Description of Embodiments] Hereinafter, embodiments of the present invention will be described based on the drawings.

1 to 3 respectively show the overall structure of an embodiment of a shellfish culture tank according to the present invention.

In these figures, the tank wall of a box-shaped water tank 1 is made of fiber-reinforced thermoplastic resin.

Thermoplastic resins used in this fiber-reinforced thermoplastic resin include polypropylene, polyethylene, a composition of polypropylene and polyethylene, nylon, polyacetal, polyester, fluororesin, polystyrene, polycarbonate, polyvinyl chloride, methacrylic resin, etc. In either case, a plasticizer is not included during molding.

Further, the fibers used in the fiber-reinforced thermoplastic resin are glass fibers, carbon fibers, nylon fibers, etc., and the properties of these fibers are preferably mat-like, and the thickness of the tank wall is relatively large. If it is thick, it is preferable that it is laminated in several stages. Moreover, it is particularly preferable that the fibers are long fibers, that is, it is particularly preferable that the fiber-reinforced thermoplastic resin is a long fiber-reinforced thermoplastic resin.

The tank wall of the water tank 1 is formed by heating and compressing such a thermoplastic resin and fibers in a laminated state in a predetermined mold, but the weight composition ratio of the thermoplastic resin and fibers is 40/60. If it is less than this, the fibers will not flow sufficiently in the mold, resulting in poor molding, which is not preferable. Furthermore, if the weight composition ratio is greater than 80/20, the rigidity of the tank wall will be insufficient and it will not be possible to withstand the load during use, which is undesirable.

A reflux pipe 2 is installed at the bottom of the water tank 1 along its longitudinal direction. The opening at the tip of the reflux tube 2 is placed near one end of the bottom of the water tank 1, and the shower tube 3 is attached to the other end of the reflux tube 2, and the water is sucked up from the tip of the reflux tube 2 by the pump 4. Water in the water tank 1 is spouted out from a shower pipe 3. The shower pipe 3 is attached to the upper side of a filter 6 placed on the water tank 1 via a mounting plate 5, and the shower pipe 3 is placed on a filter material 7 such as cotton filled in the filter 6. The water that is spouted out is allowed to penetrate. The filter material 7 is supported by a perforated plate 8 and a support plate 9 that supports the perforated plate 8, and a reflux port 11 that opens toward the water tank 1 is provided at the lower end of the filter 6. The water that has been washed and filtered by the material 7 is returned to the water tank 1 again. Furthermore, depending on the arrangement position of the tip of the reflux tube 2 and the opening direction of the reflux port 11, a water flow is formed in the water tank 1 to the left in FIGS. 1 and 2.

The inside of the water tank 1 is partitioned into a plurality of partitions along the longitudinal direction by a plurality of partition plates 12. These partition plates 1
2 is removably attached along the vertical direction by attachment pieces 13 having an L-shaped cross section attached to both side walls and the bottom of the aquarium 1. These mounting pieces 13 are also made of fiber-reinforced thermoplastic resin like the water tank 1.

Furthermore, the partition plate 12 is similarly formed from fiber-reinforced thermoplastic resin, and as shown in FIG.
The partition plate 12 is formed in a corrugated shape having a plurality of uneven grooves inclined in a predetermined direction of inclination, for example, a direction of inclination of 45 degrees, and a plurality of small holes 14 are formed in the partition plate 12 . As a result, near the water surface, when the waves generated by the water flow pass through these small holes 14, the water that passes through comes out into the air and entrains the air, so that bubbles are actively generated. On the other hand, since water flows through these small holes 14 below the water surface, the water in the aquarium 1 is smoothly circulated.

According to this embodiment, the tank wall of the aquarium 1, the partition plate 12, and the mounting piece 13 are made of fiber-reinforced thermoplastic resin, so that bacteria and parasites do not breed in the shellfish. Moreover, since the fiber-reinforced thermoplastic resin does not need to contain a plasticizer, the plasticizer does not dissolve into the water and is absorbed by the shellfish, making it possible to cultivate shellfish with excellent food hygiene.

Moreover, since fiber-reinforced thermoplastic resin is used, it is lightweight and can be manufactured at low cost.

In addition, since the partition plate 12 is formed in a corrugated plate shape with inclined grooves, gastropod shellfish easily adhere to the surface of the partition plate 12, and a large number of shellfish can be cultivated at high density. .

Furthermore, even if shellfish are cultivated at high density on the partition plate 12 in this way, a large number of bubbles are generated near the water surface due to the flow of water due to the small holes 14 formed in the partition plate 12. Shellfish do not suffer from oxygen deficiency, and a favorable growth environment for shellfish can be obtained.

In the implementation, the partition plate 12 and the mounting piece 13 were also made of fiber-reinforced thermoplastic resin, but if at least the tank wall of the water tank 1 is made of fiber-reinforced thermoplastic resin, the plasticizer will not be absorbed into the water. Outflow can be suppressed. Also, partition plate 1
2 is not limited to having uneven grooves in an inclined direction, but if the grooves are inclined at an appropriate angle, shellfish can easily adhere to the partition plate 12.

[Effects of the invention] As described above, according to the invention, there is provided a shellfish culture tank that can culture shellfish that are excellent in terms of food hygiene, is favorable for the growth of shellfish, and is lightweight and can be manufactured at low cost. can be provided.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing the overall configuration of an embodiment of a shellfish culture tank according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view thereof, and Fig. 4 is the above-described It is an enlarged perspective view showing a partition plate used in an example. 1... Water tank, 2... Reflux pipe, 4... Pump, 6
... Filter, 12 ... Partition plate, 14 ... Small hole.

Claims (1)

[Scope of utility model registration request] A plurality of partition plates made of fiber-reinforced thermoplastic resin are installed vertically in a water tank, and the partition plates are formed into a corrugated shape with slanted uneven grooves. What is claimed is: 1. A shellfish culture tank characterized by forming a plurality of small holes for allowing water to grow and circulate water below the water surface.