JPH0662707A - Device for controlling water surface level in live fish hold used in container for long-term continuous land and sea transportation of live fish - Google Patents

Abstract

PURPOSE:To control the water surface level in a live fish hold for the purpose of a lone-term safe transportation of live fishes by effectively discharging pollutants, etc., separated and floating in the live fish hold while preventing water from unnecessarily flowing out of the live fish hold and supplying water as much as it is lost. CONSTITUTION:The shape of the upper part of a live fish hold 1 is made conical or the upper part of a live fish hold 101 is tightly sealed and communicated through a connecting pipe 108 to a separately set aeration tank 111 so as to prevent shaking of water in the live fish hold 101. To the top part of the conical upper part or to the top part of the aeration tank 111, an air opening part 9 or 109 is attached so as to discharge pollutants, etc. A float valve is attached to the air opening part 9 or 109 and overflow of water can be prevented by the float valve when the water surface level in the live fish hold 1 or 101 or in the aeration tank 111 is raised in the case of shaking. A pump 4 or 104 is constantly driven so as to feed supply water from a supply water tank 3 or 103 to the live fish hold 1 or 101 and to return it through an overflow pipe 8 or 110 to the supply water tank 3 or 103.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to maintenance of the water surface in a live fish tank for use as a container for carrying out long-term sea-land integrated transportation while keeping seafood alive in the live fish tank.

[0002]

2. Description of the Related Art Conventionally, a truck with a water tank or an aircraft has been used for transporting live fish, and the transportation period was as short as about two days. In addition, as a long-term transportation method, there is a live fish boat (live fish boat), but this is a system that draws in seawater from the bottom of the ship to maintain the water quality and navigates while metabolizing water, so the water temperature and water quality are large. The increasing incidence of dead fish in the changing seas meant that they were limited mainly to domestic and inshore waters. In addition, in the case of transporting by a boat, it is necessary to collect a large amount of live fish according to the size of the boat, which is very difficult for the people involved.

[0003]

Therefore, there is a need for a new technique that enables long-term sea-land integrated transportation that complements the problems of conventional transportation means. The applicant has already developed the FISHTEC (trademark) container as this kind of technology, and as a live fish survival technology for long-term live fish transportation, it holds oxygen concentration in a live fish tank, water purification, temperature control,
Although technologies such as sterilization and lighting were developed, the need to maintain the water surface in the live fish tank became a problem. That is, with the conventional technology alone, due to shaking during transportation, the water overflows from the upper part of the live fish tank, the water surface drops, and the oxygen concentration is maintained and harmful gases such as dissolved carbon dioxide in water are released from the outlet of the live fish tank. The pollutants floated and separated by aeration caused by oxygen or air blown in (excrements of live fish,
It becomes impossible to discharge exfoliated slime, scales, missing fins, vomiting and other fine suspended organic matter) on the surface of the fish body, which leads to deterioration of water quality. Was also the cause of fatigue. The problem to be solved by the present invention is to effectively remove (release) contaminants that have been floated and separated in order to safely transport live fish for a long period of time.
However, it is to prevent the surplus water in the live fish tank from flowing out and to maintain the water surface in the live fish tank while supplying the decreasing water.

[0004]

[Means for Solving the Problems] (1) In order to reduce the free water surface area of the live fish tank to suppress water fluctuations, the upper volume of the live fish tank is reduced. For this purpose, the shape of the upper part of the live fish tank is made into a cone shape, or a separately installed elongated small cylindrical aeration tank is provided. (2) An atmospheric opening is provided to eliminate pollutants that have been floated and separated by aeration and harmful gases such as carbon dioxide released from water, and even if the water surface rises during shaking by providing a float valve at this atmospheric opening. Prevent flooding. In addition, the shape of the atmospheric opening is determined so that contaminants can be effectively discharged without the intrusion of foreign matter or rainwater from the outside. (3) A piping system that constantly replenishes water to the live fish tank by a pump from a replenishment water tank provided at a low position and returns excess water to the replenishment tank again from an overflow pipe provided at a position of the water surface to be maintained. Set up.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a first embodiment (water tank integrated type water surface maintenance apparatus) of the water surface maintenance apparatus of the present invention. The live fish tank 1 has a cone-shaped member 2 on its upper part for reducing the volume.
Is equipped with. The makeup water tank 3 and the pump 4 are arranged on the floor surface 5 of the live fish transport container in which the live fish tank 1 is arranged. The pump 4 constantly sends the makeup water from the makeup water tank 3 to the live fish tank via the pipes 6 and 7, and the overflow pipe 8
And return to the makeup water tank 3. In this case, an experiment was conducted to detect the position of the water surface with an appropriate sensor and control the position of the water surface without constantly driving the pump 4, but there were many failures and it was not suitable for actual use. The water surface in the live fish tank was maintained at the height position of the overflow pipe by constantly driving.

An atmospheric opening 9 is provided on the top of the cone-shaped member 2. Details of the atmospheric opening are shown in FIG. A first plate member 12 having an opening 11 is fixed to the inner circumference of the top cylindrical wall 10 of the pyramidal member 2 by, for example, bonding or the like. The second plate member 15 having the opening 14 corresponding to the opening 11 is fixed to the plate member 12 by an appropriate means such as a bolt. A net member 13, such as Takiron Net (trademark), that allows foamy pollutants floated and separated by aeration, harmful gas released from water, and the like to pass therethrough is sandwiched between the plate members 12 and 15. The tubular member 16 is fixed to the plate member 15 by adhesion or the like. A spherical float valve 17 is placed inside the tubular member 16 and is normally supported by the net member 13. A hollow inverted cup-shaped member 22 is provided, and the tubular member 1
A float valve chamber 23 is formed together with 6. The inverted cup-shaped member 22 includes a tubular portion 18 attached to the tubular member 16 by adhesion, press fitting, or the like, a cone-shaped portion 19, and a tubular portion 20. The cone-shaped portion 19 and the tubular portion 20. A valve seat 21 projecting inward is provided at the connecting portion with. When the water in the live fish tank 1 moves into the float valve chamber 23 during shaking, the float valve 17 rises and engages with the valve seat 21, blocking the opening of the valve seat and preventing overflow.

Top tubular wall 1 with an appropriate number of outlets 24
By fixing the lid 26 to the flange portion 25 at the top of 0 with bolts or the like, foreign matter, rainwater and the like are prevented from entering the live fish tank 1 from the outside.

The operation of the water surface maintaining device integrated with the water tank shown in FIGS. 1 and 3 is as follows. The pump 4 is constantly driven to feed the makeup water from the makeup water tank 3 to the live fish tank 1 via the pipes 6 and 7, and returns it to the makeup water tank via the overflow pipe 8 so that the water surface in the live fish tank is Maintain a fixed position determined by height. The pollutants floating up and separated by aeration caused by oxygen or air blown into the live fish tank to maintain the oxygen concentration rise in the form of bubbles. And the foamy pollutant is the net member 1
3, passes around the float valve 17 supported by the net member 13, enters the top cylindrical wall 10 through the opening of the valve seat 21, and is discharged through the discharge port 24.

When the live fish tank 1 is shaken and the water surface rises, and the water passes through the net member 13 into the float valve chamber 23, the float valve 17 moves away from the net member 13 and rises to the valve seat 21. Engagement and blocking of the opening prevents flooding.

FIG. 2 is an explanatory view of a second embodiment of the water surface maintaining apparatus of the present invention (water tank separate installation type water surface maintaining apparatus). The top of the live fish tank 101 is sealed, and the connecting pipe 108 is attached to the top and is connected to the aeration tank 111. Aeration tank 1
At the top of 11 is an atmospheric opening 109 similar to the atmospheric opening 9 shown in FIG. An overflow pipe 110 is provided between the aeration tank 111 and the makeup water tank 103.

The pump 104 is constantly driven to feed the makeup water from the makeup water tank 103 to the live fish tank 101 via the pipes 106 and 107, and to the makeup water tank 103 via the connecting pipe 108, the aeration tank 111 and the overflow pipe 110. The live fish water tank 101 is filled with water and the water surface in the aeration tank 111 is maintained at a fixed position determined by the height of the overflow pipe 110. The structure and operation of the atmosphere opening 109 are clear from the description of the first embodiment, so it is not necessary to add further description.

In the second embodiment, live fish tank 101
By providing the aeration tank 111 which is separate from the above, in the case of the first embodiment, the air can be discharged from the atmospheric opening 9 to the extent that it can prevent the bubble disease, but it cannot be exhausted sufficiently and is again pumped by the pump. Bubbles such as pollutants harmful to live fish and dissolved carbon dioxide in water mixed in the live fish tank are accompanied by the release of air or oxygen for aeration in the aeration tank 111 which is separate from the live fish tank. It can be sufficiently discharged through the atmospheric opening 109. Air bubbles enter the fish body with active water intake from live fish, attach to the intestines and stomach walls, and suffer from bubble disease, which prevents bubbles from flowing into the live fish tank where live fish swim. Diseases can be prevented. In this respect, the second embodiment can release not only bubbles but also excess oxygen and harmful nitrogen that have not been dissolved into the atmosphere in the aeration tank outside the live fish tank.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a water surface maintenance device integrated with a water tank that is a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a separate water tank type water surface maintenance device according to a second embodiment of the present invention.

3 is an enlarged explanatory view of an atmospheric opening provided in the water surface maintenance device shown in FIG. 1. FIG.

[Explanation of symbols]

 1,101 Live fish tank 2 Cone-shaped member 3,103 Make-up water tank 4,104 Pump 6,7,106,107 Pipe 8,110 Overflow pipe 9,109 Atmosphere opening 10 Top cylindrical wall 108 Communication pipe 111 Aeration tank

Claims (7)

[Claims] 1. A live fish tank installed on a container for transporting live fish, (b) a water surface fluctuation suppressing means for suppressing fluctuation of the water surface in the live fish tank, and (c) an oxygen concentration in the live fish tank. A discharging means for discharging foamy pollutants floating and separated by aeration caused by oxygen or air blown to retain and discharge harmful gas from water and harmful gas discharged from water, and (d) the discharging means. Overflow prevention means for preventing water in the live fish tank from overflowing from the discharging means when the live fish tank moves, and (e) for maintaining the water surface in the live fish tank at a predetermined height. And a makeup water circulating means for supplying makeup water into the live fish tank, discharging it from a predetermined height position of the live fish tank, and circulating the makeup water. 2. The water level maintaining device in a live fish tank according to claim 1, wherein the water surface fluctuation suppressing means comprises a cone-shaped member formed on an upper part of the live fish tank so as to reduce an upper volume of the live fish tank. 3. The makeup water circulating means comprises: (i) a pump and a makeup water tank installed on the live fish transport container; (ii) a pipe communicating with the pump and the makeup water tank; and (iii). A pipe that communicates with the pump and the live fish tank so as to supply makeup water into the live fish tank by the pump; and (iv) is attached to the live fish tank.
2. An overflow pipe arranged at a predetermined height, which communicates with the live fish tank and the makeup water tank.
Water surface maintenance device in live fish tank. 4. The discharge means comprises an atmospheric opening provided at the top of the cone-shaped member, and the atmospheric opening is
(I) a first plate member having an opening fixed to the inner circumference of the top cylindrical wall of the cone-shaped member having an outlet, and (ii) an opening fixed to this plate member and corresponding to the opening. Second to have
Plate member, (iii) a tubular member fixed to the second plate member, (iv) a hollow inverted cup-shaped member attached to the tubular member, and (v) foreign matter, rainwater, etc. The water level maintaining device in a live fish tank according to claim 2, which is constituted by a lid fixed to a flange portion at the top of the top tubular wall so as to prevent the water from entering the top tubular wall. 5. The overflow preventing means is (i) sandwiched between the first and second plate members, and the foamy pollutant,
A net member for passing harmful gas and water discharged from water, (ii) a spherical float valve housed in the tubular member and placed on the net member, and (iii) the inverted cup-shaped member Has an opening and is engaged with the float valve when the float valve rises due to the shaking of the water in the live fish tank, and the float valve closes the opening to prevent overflow. 5. A water level maintaining device in a live fish tank according to claim 4, comprising the valve seat as described above. 6. The makeup water circulation means comprises: (i) a pump and a makeup water tank installed on the live fish transport container; (ii) a pipe communicating with the pump and the makeup water tank; and (iii). A pipe communicating with the pump and the live fish tank, so as to supply makeup water into the live fish tank by the pump, (iv) a connecting pipe attached to the live fish tank, and (v) for transporting the live fish From a slender cylindrical aeration tank installed on the container and communicating with the live fish tank by the connecting pipe, and (vi) an overflow pipe arranged at a predetermined height and communicating with the aeration tank and the makeup water tank. The water level maintenance device in the live fish tank according to claim 1. 7. The live fish tank according to claim 6, wherein the water surface fluctuation suppressing means comprises (i) a closed top of the live fish tank, (ii) the overflow pipe, and (iii) the aeration tank. Water level maintenance equipment.