JPH0728628B2 - Live squid transport equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to flounder, soi, Thailand,
The present invention relates to an aquarium for live fish suitable for keeping fish such as yellowtail, horse mackerel and squid alive for a long time.

[0002]

2. Description of the Related Art With the recent improvement in eating habits, the demand for fresh fish is increasing. In response to this, various live fish transportation methods have been developed for the purpose of supplying fresher fish, and the fish that has been taken is placed in an aquarium and transported alive from the fishing boat to the consuming region. Also, the number of restaurants equipped with aquariums for live fish is increasing.

In such an aquarium, in order to keep the fish alive for a long time, a circulating flow of seawater is created in the aquarium to create a growth environment close to that of seawater. In such a method, conventionally, a circulating water flow is created in the water tank by circulating water discharged to the water tank in a series of seawater circulation paths such as a filtration tank-heat exchanger-oxygen supply device. There was a problem that a sufficient circulation flow was not possible. In addition, there was a problem that stagnation occurred at the part opposite to the hole for circulating flow to the aquarium, and feces and other solid matter accumulated there for a long time, which adversely affects the survival of fish. . Furthermore, although the flow velocity suitable for existence differs depending on the fish species, it is difficult to change the flow velocity easily with the conventional ones, and it is difficult to keep the fish alive for a long time when the type of fish is changed. there were.

[0004]

Therefore, according to the present invention, the water circulates uniformly in the aquarium without causing partial stagnation or water flow difference, and the fish is given an optimal flow according to the fish species to survive. It is an object of the present invention to provide an aquarium for live fish that can be kept for a long time.

[0005]

According to the present invention, in the water tank, the stagnation of the water flow occurs in the curved portion of the inner wall of the water tank located opposite to the water flow generation hole even when the inner shape in the plane is circular or substantially oval. However, this stagnation was made based on the finding that the above problem can be efficiently solved by sucking water into the curved portion and discharging the sucked water in the flow direction of the circulating flow in the water tank.

[0006] That is, the present invention is a live fish tank for forming a circulating flow along a wall surface of a water tank by providing a water flow generating hole in a curved portion of the water tank having a circular inner surface or a substantially oval shape. Provided is a water tank for live fish, characterized in that a water flow auxiliary circulation device for sucking water and discharging the sucked water in a flow direction is provided in a curved portion on the opposite side of the generation hole. In particular, in the case of transporting squid, if the water tank with a lid and the inner shape in the plane is a substantially oval shape, a water flow generating hole is provided in the short side curved portion of the water tank, or the inner shape in the plane is In the case of a circular shape, a water flow generating hole is provided at an arbitrary position to form a circulation flow along the wall surface of the water tank, and a drain hole is provided in the upper part of the water tank in the vicinity of the portion in contact with the lid. A water flow auxiliary circulation device which is provided and sucks water into a curved portion on the opposite side of the water flow generation hole (short side curved portion when the planar inner shape is a substantially oval shape) and discharges the sucked water in the flow direction. It is preferable that the structure is provided.

In the above-mentioned water tank, a filter tank is provided at the center of the water tank, and a seawater storage unit for accommodating live fish is formed in a space surrounded by an outer wall of the water tank and an inner wall of the water tank. A drain hole is provided in the upper part of the tank in the vicinity of the portion in contact with the lid, and the seawater of the seawater storage portion is circulated through the drain hole, through the filtration tank and from the water flow generation hole to the seawater storage portion. When the circulation device is provided, the device can be downsized, the feces can be removed very efficiently, and the fish can be kept alive for a long time. In particular, since squid dung is light and floats on the surface of seawater unlike other fish, squid dung can be efficiently removed by these live squid transport tanks.

In the above water tank, a cartridge type filtration device is connected to the filtration tank via a circulation pump, and seawater in the seawater storage section passes through the filtration tank and a water flow is generated through the filtration tank and the cartridge type filtration device. By providing a circulation device to circulate from the hole to the seawater storage unit, the device can be downsized and fine dirt that cannot be collected in the filtration tank can be efficiently removed. You can keep the fish alive for a long time with a simple operation such as replacing. Next, the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of a live fish tank according to the present invention, particularly a live fish tank suitable for live squid transport tank 1, FIG. 2 is a partial schematic view, and FIG. 3 is a vertical sectional view. Is. Here, I will explain the case of live squid as live fish.
The present invention is not limited to the case of live squid. The water tank 2 is provided with a water flow generation hole 21 in the curved portion on the short side, and the water introduced from here forms a circulation flow in the water tank in the direction indicated by the arrow. Conventionally, water flow stagnates, that is, stagnation occurs in the short side curved portion A of the inner wall of the water tank located opposite to the water flow generation hole 21. In the present invention, in order to eliminate this stagnation, a water suction hole 22 is provided in the short side curved portion on the opposite side of the water flow generation hole 21, from which water is sucked, and the water flow auxiliary circulation device 23 is used to discharge the water from the discharge water hole 24. The intake water is discharged in the flow direction. Here, the water flow auxiliary circulation device 23 includes a suction hole 22 and a discharge hole 2 through a circulation pump 25 and a flow velocity adjusting valve 26.
It can be configured by a pipe 27 that connects 4 and 4, and the speed of the water sucked from the suction hole 22 is adjusted to a predetermined flow velocity and discharged from the discharge hole 24 in the flow direction of the circulating water. Here, the number of the suction holes 22 and the number of the drain holes 24 may be one each, but they may be two or more in the longitudinal direction or the lateral direction of the water tank. The number and position of the discharge holes 24, the direction in which the discharged water is discharged, and the like can be appropriately determined based on the circulation direction and speed of the circulating water in the water tank 2.

The water tank 2 has a lid 3, and a filtration tank 4 is provided in the approximate center of the water tank 2. A seawater storage unit 5 for storing live squid is formed in a space surrounded by the outer wall of the filtration tank 4 and the inner wall of the water tank 2, and the squid is stored therein.
Here, the upper end of the filtration tank 4 is almost in contact with the lid, and the drainage hole 6 is formed here. The drain hole 6 is preferably of a size that does not allow squid to enter the inside of the filter tank 4, for example, a horizontal bar of about 18 cm in width and about 10 cm in length and a horizontal bar of about 5 to 7 mm. It is good to attach 5 to 7 of them. The drain hole 6 is preferably formed in the filter tank 4 so that the distance from the upper end of the drain hole 6 to the seawater surface 7 is 0 to 15 cm, preferably 0 to 10 cm, and the seawater is filtered from other portions. It is better not to enter the tank 4. When the aquarium of the present invention is used, seawater is first put in the seawater storage unit 5, live squid is put therein, and then the seawater surface 7
Sufficiently add seawater so that the cap comes in contact with the lid 3
And 17 to cover the outer wall of the filter tank 4 and the inner wall of the water tank 2 so that the head space is not substantially generated. In other words, when headspace occurs, the sea surface sways during transportation of squid, and the squid is stressed. In addition, when the live fish tank of the present invention is used while standing still, the lid may or may not be provided.

According to the present invention, when the aquarium for live fish is used for transportation, the lid 3 and the caps 16 and 17 are provided so that the lid 3 and the caps 16 and 17 do not come off during transportation and seawater does not leak. It is preferable that it can be firmly fixed to the water tank 2. The shape of the cap may be arbitrary, and the lid and the cap may be integrated, or the height of the sea surface in contact with the lid may be the same as the height of the sea surface in contact with the cap.

Then, the pump 8 is operated so that the seawater in the seawater storage 5 enters the filter tank 4 through the water absorption holes 6 formed in the upper portion of the filter tank 4. The seawater that has entered the filtration tank 4 is, for example, a filter 9 made of Saran fiber or the like.
When passing through, squid feces are removed, activated carbon, coral wood,
After passing through the packed bed 10 made of ceramics, zeolite or the like, harmful components such as ammonia are removed here. This packed bed 1
The aerobic bacteria disclosed in JP-A No. 64-71427 can be cultivated at 0. The seawater purified in this way is extracted from under the filter tank 4,
The temperature is adjusted by the heat exchanger 11 to a temperature suitable for fish growth. For example, the temperature of seawater is 8 ° C or lower, preferably 2 to
The temperature is preferably adjusted to 8 ° C, more preferably 5 to 8 ° C. In other words, at this temperature, the squid does not weaken or co-eat, and the consumption of dissolved oxygen in seawater can be reduced. Next, the seawater is introduced into the oxygen supply device 12, where the oxygen consumed by the aeration is replenished, and at the same time, viscous substances, stains and the like that come out of the squid due to the bubbles are removed. The seawater adjusted to the conditions suitable for the survival of squid in this way is introduced into the water tank 2 through the pipe 13 and circulated. When the seawater is introduced into the water tank 2 from the water flow generation hole 21 through the pipe 13, the seawater in the seawater storage unit 5 is introduced so as to form a flow that circulates in one direction. At this time, it can be introduced from several places. In addition, when light does not enter the seawater storage unit 5 due to the cover 3, for example, a window is provided on the outer wall of the aquarium,
It is preferable to install the lamp 14 here so that the inside of the seawater storage unit 5 has an appropriate brightness. In other words, when the seawater storage unit 5 is darkened, the squid eats together and becomes a so-called dumpling, and the squids die one after another. Therefore, it is preferable to provide two lamps of maximum 5 W, preferably 2 to 5 W, from the outside in the middle stage of the water tank 2. Also, make sure that no light comes in except from the lamp.
It is preferable to paint the other portions in a color that is not so bright.

In the present invention, the embodiment shown in FIG. 4 may be a schematic sectional view. That is, after connecting the drainage pipe of the filtration tank 4 to the pump 8 and then to the cartridge type filtration device 31, it passes through the heat exchanger 11, the oxygen supply device 12 and the pipe 13, and finally circulates from the water flow generation hole 21. Water is preferably introduced into the aquarium 2.
In this way, the pump 8 causes the seawater in the seawater storage unit 5 to enter the filtration tank 4 through the drain holes 6 formed in the upper portion of the filtration tank 4, and then the seawater is extracted from the bottom. The harmful substances such as squid stains that have not been removed by the primary filtration (filter tank 4) introduced into the filtration device 31 and the harmful components such as ammonia that cannot be completely removed are also removed. Here, one cartridge type filtration device 31 may be used, but it is preferable to use two or more cartridge type filtration devices 31 connected in series. By doing so, extremely fine dust can be removed extremely efficiently. Such a cartridge type filtration device 31 is preferably provided outside the aquarium 2, and preferably of a type in which a cartridge type filter 33 is provided inside a filter housing 32. For example, as the cartridge type filtration device 31,
Nippon Filter Co., Ltd. NPP type, S type,
Examples include A type and H type filter housings.

In the present invention, various improvements can be added to the above-mentioned live fish tank. For example, a mesh-shaped grate 15 is installed at the bottom of the aquarium 2 to trap water insoluble matter generated in the seawater storage part 5 under the grate to prevent the fish from being dispersed in the seawater storage part 5. be able to. Further, a striped pattern can be drawn on the inner wall of the water tank 2 or the outer wall of the filtration tank 4. This is so that the squid with advanced vision can identify the outer wall and prevent it from colliding with the wall.

Further, the caps 16 and 17 are provided with water draining holes 40 and 41, and a water level detector 42 is installed in either one or both of the water draining holes 40 and 41, so that seawater is swayed by shaking during transportation of fish. When seawater is discharged at the same time as seawater is discharged by an oxygen supply device such as an aerator and the water level is lowered, this is detected, this signal is collected in the control box 43, and the pump 45 is operated to operate the auxiliary seawater tank. It is more effective to introduce the seawater in 44 into the seawater storage unit 5 so that no head space is generated.
Here, the water level detector 42 may be provided outside the drain holes of the caps 16 and 17 and near the sea surface 7 of the water tank. In addition, seawater is stored in the seawater storage unit 5 from the auxiliary seawater tank 44.
Can be supplied to any position of the seawater storage unit 5
It is good to replenish at the bottom of.

When seawater is used in the present invention,
Sea water can be used as it is, but it is preferable to use one that has been cleaned by filtration in advance. Also, fresh water can be used depending on the fish species. It is preferable that the inner surface of the water tank used in the present invention and the outer surface of the filtration tank do not have a convex portion, for example, the cross section is a curve such as a circle or an ellipse.

[0017]

According to the present invention, there is provided an aquarium for live fish, in which water is circulated uniformly without causing partial stagnation in the aquarium and the fish can be kept alive for a long time. In particular, it is possible to provide a live fish tank which can be efficiently installed on a loading platform such as a truck. Further, according to the live fish tank of the second and third aspects, the fish dung can be efficiently removed, the fish is not stressed, and the fish can be kept alive for a long time. Therefore, if the aquarium for live fish of the present invention is used, it is possible to efficiently transport fish from the fishing ground to the consumption area while keeping alive.

Further, in the live fish tank according to claim 2, since the filter tank is incorporated in the tank, the apparatus itself can be made compact. Therefore, the apparatus can be installed in a restaurant, and in particular, fish is transported alive. In the aquarium for live fish according to claim 2, the fish can be kept alive for a long time by a simple operation such as replacing the filter of the cartridge type filtration device. The aquarium for live fish of the present invention is suitable for keeping fish such as flounder, soy, Thailand, yellowtail, horse mackerel, squid, etc. alive for a long time, and is particularly suitable as an aquarium for live squid, and the aquarium of the present invention. According to this, all squids such as squid and squid can be kept alive for a long period of time regardless of the type of squid, and it is particularly suitable for the live transportation of delicate squid.

Next, the present invention will be described with reference to examples.

[0020]

【Example】

Example 1 Live squid was transported by truck for 16 hours using the water tanks shown in FIGS. This is an elliptic cylindrical water tank 2 having an elliptical shape (long diameter 250 cm, short diameter 180 cm) and height 110 cm, and a filtration tank 4 having a long diameter of 120 cm and a short diameter of 60 cm is installed at the center of the inner surface of the filtration tank 4. A seawater storage unit 5 is formed in a space surrounded by the outer wall of the water tank and the inner wall of the water tank 2. The seawater storage section 5 has a cross-section that is substantially donut-shaped.
It is possible to accommodate a sea of 2m ^3.

The upper end of the filter tank 4 is almost in contact with the iron lid 3, and the upper end of the drain hole 6 having a size of 18 cm in width and 10 cm in height is 12 cm from the upper end of the filter tank 4 (3 cm from the sea level 7). Is formed in. The drain holes 6 are provided with grids at intervals of 0.5 to 0.7 cm to prevent squid from entering. Two 2 cm thick Saran fiber filters 9 and 9 are installed in the filter tank 4 to facilitate removal of squid feces, and activated carbon and coral material are placed under the filter tank having a diameter of 50 cm. About 60
A packed bed 10 filled over the cm is provided, and a porous plate is provided at the bottom to prevent leakage of the filling material. In order to prevent the water insoluble matter generated in the seawater storage unit 5 from being trapped in the lower portion of the water tank 2 and prevented from being dispersed in the seawater storage unit 5 by squid, 7.5 cm from the bottom of the water tank 2
At this location, a mesh-shaped grate 15 was installed. Also, aquarium 2
Two 2W lamps were installed in the middle section. Further, four water suction holes 22 are provided in the curved portion on the opposite side of the water flow generation hole 21,
Further, four discharge holes 24 are provided, and these are connected by a water flow auxiliary circulation device 23 composed of a circulation pump 25, a flow rate adjusting valve 26 and a pipe 27. Then, the speed of the water sucked from the suction hole 22 is adjusted to a predetermined flow velocity (3 to 6 cm / sec), and the water is discharged from the discharge hole 24 in the flow direction of the circulating water.

Seawater is put in the seawater storage unit 5 of the above device 1,
Then, put 200 live squid here, and then add enough seawater so that the sea surface 7 contacts the lid 3, and the head space is substantially formed in the space surrounded by the outer wall of the filter tank 4 and the inner wall of the water tank 2. I tried not to occur. In addition, the lid 3 is attached to the water tank 2 to prevent the lid 3 from coming off and seawater from leaking during transportation.
Firmly fixed to.

Next, the pump 8 is operated to put the seawater in the seawater storage unit 5 into the filter tank through the water absorption hole 6 formed in the upper portion of the filter tank 4, and the squid feces are removed by the filters 9 and 9. In the packed bed 10, harmful components such as ammonia were removed. The seawater purified in this way is extracted from the bottom of the filter tank 4 and is preferably used in the heat exchanger 11 for growing squid 5 to 8
The temperature was adjusted to ° C. Next, seawater was introduced into the oxygen supply device 12, where oxygen consumed by aeration was replenished. Seawater adjusted to conditions suitable for squid survival in this way was introduced into the water tank 2 through the pipe 13 from the water flow generation hole 21 and circulated. When the seawater is introduced into the aquarium 2 through the pipe 13, the seawater in the seawater storage unit 5 is introduced so as to form a flow that circulates in one direction, and the flow velocity is 3 to 5 cm / sec. A circulating flow was formed.

As a result, no stagnation of water flow or retention of insoluble matter occurred in the A part of the water tank, and when the squid was transported by truck for 16 hours, no squid died and the survival rate was 1
It was an excellent value of 00%. Example 2 The squid was transported by truck in the same manner as in Example 1 except that two cartridge type filtration devices 31 shown in FIG. 4 were connected behind the pump 8 in FIG. No stagnation or retention of insoluble matter occurred, and the same results as in Example 1 were obtained. Example 3 Using the apparatus shown in FIGS. 1 to 3 except that the lid 3, the caps 16 and 17, the water level detector 42, the control box 43, the pump 45, the auxiliary seawater tank 44, and the lamp 14 are attached. The sea bream had 250 days for 2 days, but no sea bream died, and the survival rate was 100%, which was excellent.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a live fish tank of the present invention.

2 is a partial schematic view of the live fish tank of FIG. 1. FIG.

FIG. 3 is a schematic vertical sectional view of the live fish tank of FIG. 1.

FIG. 4 is a schematic vertical sectional view of a cartridge type filtration device used in the present invention. In the figure, 2 is a water tank, 3 is a lid, 4 is a filtration tank, 5 is a seawater storage unit, 6 is a drainage hole, 10 is a packed bed, 1
1 is a heat exchanger, 12 is an oxygen supply device, 21 is a water flow generation hole, 22 is a suction hole, 23 is a water flow auxiliary circulation device, 24 is a discharge hole, and 31 is a cartridge type filtration device.

Claims (1)

[Claims] 1. A seawater storage tank for accommodating a live squid having a circular inner shape or a substantially oval planar shape, and (b)
A lid for the seawater storage tank, which is also provided at a position where headspace does not occur in the seawater stored in the seawater storage tank, (c) a plurality of water flow generation holes provided in the curved portion of the seawater storage tank, and in the vertical direction thereof. (D) a water flow auxiliary circulation device that is provided at a curved portion on the opposite side of the water flow device and that inhales seawater and discharges the inhaled seawater in the flow direction; (e) the center of the water tank with a lid; (F) Drainage holes provided in the upper part of the filtration tank in the vicinity of the portion in contact with the lid, (g) Seawater in the seawater storage tank passes through the drainage holes, and passes through the filtration tank. A circulation pump for circulating water from the water flow generation hole into the seawater storage tank,
And (h) a cartridge-type filtration device connected to the filtration tank via the circulation pump, the transportation device for live squid.