JPS59227229A - Fish feeding apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] It's about location.

In the future, if outer space habitats such as Space Station 7 are realized, it will be necessary to raise fish for long periods of time for food, ornamental purposes, experiments, etc., and the development of this breeding equipment is urgently needed. As an application example of the known technology, the one shown in Fig. 1 can be considered.A container l with a closed structure is almost filled with water 2, and the air inlet pipe 3 is filled with water 2. It is intended to be bred.

[7 However, this method has problems such as the V1 order, making it difficult to adopt. That is, in a zero gravity state, the bubbles 5 that are not dissolved in the water 2 cannot be separated due to the difference in specific gravity, and remain in the water in a mixed state of the water 2 and the bubbles 5. As the fish 4 consume dissolved oxygen in the water, the oxygen in the bubbles 5 dissolves in the water according to the principle of diffusion, but as the fish 4 consume oxygen, the dissolved oxygen in the water decreases and The fish 4 become oxygen deficient due to the increase in nitrogen concentration in the water 2.

In order to prevent this, it is necessary to supply fresh air from the air inlet tube 3 and extract the bubbles 5 with increased nitrogen concentration, but underwater VC m. It is difficult to extract only the bubbles 5 from the mixed state, and it is necessary to find a solution to this problem.

The present invention has been made in view of the above circumstances, and provides a fish container filled with water and having a closed structure.

A circulation pump that circulates water in the container, a purification device for the circulating water, an air mixing device for dissolving oxygen in the circulating water, and a gas-liquid separation device using a waterproof and breathable porous material. The gist of this invention is a fish breeding device characterized by a closed-loop water circulation system, and the object is to provide a fish breeding device that can be used for long periods of time even in weightless conditions.

The present invention will be explained in detail based on the embodiments shown in FIGS. 2 to 5. Figure 2 is a front sectional view of the entire rearing device, Figure 3 is a detailed sectional view of the porous phase of the gas-liquid separator in Figure 2, and Figure 4 is the
AA sectional view of the figure.

FIG. 5 shows a pressure state diagram of the circulation line of the rearing apparatus shown in FIG. 2. A container 6 for raising fish 4 has a closed structure and is filled with water 2. A purification device 7 for removing foreign matter such as excreta from the fish 4 is provided in the pipe downstream of the container 6.

This purifying device 7 may use a combination of known devices such as nylon net and activated carbon. A restrictor 8 is provided downstream of the purifier 7 to create a pressure difference in the circulation waterway system. The throttle 8 may be a known type such as an A-rifice or a throttle valve ring. A circulation pot 1 is provided downstream of the throttle 8 and is operated by a known drive device such as an electric motor to circulate the water 2. In the pipe line between the orifice 8 and the circulation pot 11 [
Air nozzle applying the principle of pipes 9. Check valve 20
．． An air mixing device consisting of an air filter 19 is provided.

A gas-liquid separation device 1ita is provided in the F flow of the circulation pump 11.

This gas-liquid separator 13 has a porous material 1 such as Teflon inside.
A large number of narrow tube-shaped passages consisting of 4 are arranged, and a mixed water of water 2 and bubbles 1O is passed through the passages to transport only gas into the porous @
The pipe line between the circulation bog 11 and the gas-liquid separator 13, which passes through the 14 minute Jlz1 and discharges it to the outside of the device 13 through the space 17, includes:
Water gamma for preventing pulsation in the water circulation system and replenishing evaporated water for gas extraction from the gas-liquid separation device 13;
It is equipped with a mulrator 12. The gas-liquid separator 13 and the container 6 are connected by a pipe 16, forming a closed loop water circulation system.

Next, one effect will be explained. When the a/i JSr pump is activated, the fIIIi term system 1)4. As soon as the water begins to circulate through the air filter 19. Air is sucked in through the air nozzle 9 through the check valve 20, and on contact with the surrounding water, a portion of the air dissolves in the water. Historically, the dissolution of air is promoted by the stirring effect of the circulation pump 11. The air that has not been dissolved in the bath remains as bubbles IO, enters the gas-liquid separator 13, and is separated from the water by the internal porous +A140 action.

This porous material +A14 is made of a water-repelling material such as Teff Cl and has a large number of micropores 21 as shown in FIG. 3, making use of its water-repellent property.

Allows gas to pass through, but not water. For example, Ray/
It has an effect similar to that of a coat with zero waterproofing power.

Therefore, air bubbles 1O are present inside the narrow R-shaped porous material 4;114.
If water containing 1.
! : Due to the action of the throttle 8, the internal pressure d of the porous phase 14 is higher than that of the external space 17, so the air bubbles 10 in the water
As shown in Fig. 83, the white color is flowing from the fine hole 21 to the space 1.
l'1ItI+ to 7, target 01 out.

will be separated. The oxygen-dissolved water 15 after the bubbles have bubbled 1 minute after passing through the tube 16 and into the container 6 VC.
enter. Here, the pressure distribution in the water circulation system will be explained based on FIG. 5. The diagram indicated by the dotted line 22 shows the soil force state when there is no aperture 8. The pressure of the water circulation system is increased by the total pressure loss at the pump 11 outlet from the circulation pump IIK.

v There is a low l• corresponding to the pressure loss at each part along the trailing flow.

It is clear from the Herr/Lee law regarding melting that this pressure distribution is generally low.

This causes a problem in that the gas becomes difficult to dissolve, and the dissolved air becomes more likely to form bubbles again. on the other hand,
The diagram indicated by the solid line 23 shows that the pressure loss is caused by the throttle 8, and the pressure is lower between the throttle 8 and the circulation pop 11.
The pressure is high in the range outside υ. Therefore, the air nozzle 9 is in a state where it is easy to suck air, and the necessary amount of air is
Since it is maintained at ff (Ij) and the pressure is high downstream of the circulation pump 11, the solubility of oxygen in water is improved.

Historically, the internal pressure in the porous l51140 portion of the gas-liquid separator 13 is higher than that in the external space 17 as described above (in the case of Teflon porous material).

ol ~ 0.2 Kg/ca G 8 degrees), air bubbles 1
o is easily discharged, increasing separation efficiency.

The pressure distribution in the water circulation system is not limited to the shape shown in the diagram in FIG. 5, but may be adjusted by adding resistance corresponding to the throttle 8 to other locations as appropriate depending on the conditions of each device.

As described in detail below, according to the present invention, there are provided a fish container having a closed structure filled with water, a pump for circulating the water in the container, and a purification device for the circulating water. By configuring a closed-loop water circulation system with a gas-liquid separator using a waterproof and breathable porous (A), It has become possible to raise fish for long periods in zero gravity, which had been difficult.
This will greatly contribute to the development of the space science industry.

2. The present invention is not limited to use in a zero-gravity state, and can be applied to a device for transporting fish on land with great effect. In other words, since the container containing the fish is filled with circulating water, even if the entire device is subjected to vibrations or agitation due to disturbances during transportation, the water in the container hardly moves, and there is no risk of injury caused by the fish colliding with it. This has great effects, such as reducing the occurrence of fatigue and reducing the mortality rate of fish during transportation.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a fish breeding container to which known technology is applied. Fig. 2 is a front sectional view of a fish breeding apparatus as an embodiment of the present invention, and Fig. 3 is a detail of the gas-liquid separation device shown in Fig. 2. Section m1 diagram,
FIG. 4 is a sectional view taken along the line A-A in FIG. 2, and FIG. 5 is a pressure state diagram of the fish breeding container shown in FIG. l...container, 2...water, 3...air introduction pipe, 4...
fish. 5...Bubble, 6...'6 vessel, 7...Purifier a, 8
...Aperture. 9...Air nozzle, 10 ・Bubble, 11...111
'i 4A bo/], 12... water accumulator, 13...
... Gas-liquid separation device, 14 - Porous material, 15... Water, 16... Tube. 17... Space, 18 - Loss gas, 19... Air filter, 20 Check valve, 21... Fine hole, 22... Pressure diagram without throttle 8, 23... Throttle 8 'f1:
Pressure diagram in case of having. Figure 3 Figure 5

Claims (1)

[Claims] A fish container with a sealed structure filled with water, a circulation pipe that circulates the water in the six vessels, a purification device for the circulating water, an air mixing device for dissolving oxygen in the circulating water, and a waterproofing device. A fish breeding device characterized in that a closed-loop water-M ring system is constructed with a gas-liquid separating device 11 using a porous material that is permeable.