JPH04197119A - Breeding apparatus for shellfish - Google Patents

Abstract

PURPOSE:To obtain the subject apparatus having compact size by vertically arranging breeding water tanks free from intermediate partition wall in plural stages, placing a level-controlling tank at one end of each breeding tank and providing a water-spraying channel, a draining hole, a draining pipe and a spraying pipe in specific state. CONSTITUTION:Breeding water tanks 1a, 1b, 1c are arranged in vertical direction and the fresh water from a water source 2 is sprayed from a water-spraying channel 3a into the breeding water tank 1a. The bottom of each breeding water tank is provided with plural draining holes 5a, 5b, 5c and connected to each level-controlling tank 7a, 7b, 7c through draining pipes 6a, 6b, 6c. The breeding water tanks 1b, 1c are provided with water-spraying pipes 31b, 31c to spray breeding water supplied from the upper breeding water tank via the level-controlling tank of the upper breeding water tank.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multi-stage shellfish breeding device suitable for breeding shellfish such as planers and clams, and lugworms used as fishing parts.

(Prior art) In order to artificially raise shellfish such as planer, young shellfish are grown to a size of about 5 mm by feeding with diatoms, and then raised to about 30 to 35 mm in an intermediate breeding tank with artificial feed. This is then released into the sea.

As such an intermediate rearing tank, as shown in Fig. 2, a group of rearing tanks in which a plurality of rearing tanks 1', . A water level adjustment tank 7' is provided at one end of the aquarium group, and the uppermost breeding aquarium group is provided with a watering pipe 3a' for sprinkling fresh water from the water supply source 2' over the entire length of the aquarium group. A drain hole 5'' is provided in the center of the bottom of the rearing tank 1', and the drain holes 5', . Breeding aquarium groups other than aquarium groups are equipped with watering pipes 3b' and 3c' for spraying the breeding water from the breeding aquarium group directly above the aquarium group through the water level adjustment tank of the aquarium group directly above the group over the entire length of the aquarium group. It is publicly known.

In this intermediate rearing device, in rearing tank groups located above and below each other, rearing water from the upper rearing tank group passes through the drainage hole #drain pipe of the upper rearing tank group and the water level adjustment tank to the lower rearing tank group. Water flows down from the water pipes of the group, and natural flow occurs from the top breeding tank group to the bottom breeding tank group as a whole in the device. Therefore, it is only necessary to administer the artificial feed at one place in the uppermost rearing tank group, and the precipitated waste generated in each rearing tank flows into each water level adjustment tank and stays there, and is transferred to the lower rear rearing tank. Furthermore, it has the advantage of being a natural flow based on the height difference and does not require a pump or the like.

(Problem to be Solved) However, in the above intermediate rearing device, a plurality of rearing waters i1', 1 for - water level adjustment tanks 7'.
', a drainage hole 5'' is provided on the bottom of each rearing tank 1', and the drainage hole 5' communicates with the water level adjustment tank 7''. , is equivalent to using an aquarium with an intermediate septum. However, at both corners of the lower end of the intermediate septum, the flow velocity becomes extremely low, and breeding water stagnates, preventing satisfactory metabolism, resulting in a dead space for breeding. This dead space is
It can be reduced by increasing the flow velocity, but under natural flow that utilizes height differences, increasing the flow velocity requires increasing the height difference, which inevitably increases the size of the entire device.

An object of the present invention is to eliminate dead space in a breeding aquarium in an intermediate breeding device for shellfish, thereby ensuring compactness as a whole.

(Means for Solving the Problems) The shellfish breeding device of the present invention has a plurality of vertically arranged breeding tanks having no partition wall in the middle, and a water level adjustment tank is arranged at one end of each breeding tank, The top breeding tank is equipped with a sprinkling channel that sprinkles fresh water from the water supply over the entire length of the tank.
Multiple drainage holes are provided at intervals on the bottom of each breeding tank, and these drain holes are connected to each water level adjustment tank of each breeding tank through drain pipes. This structure is characterized by providing a sprinkling channel that sprinkles breeding water over the entire length of the breeding aquarium from inside the aquarium via the water level adjustment tank of the above-mentioned breeding aquarium.

(Explanation of Examples) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, which is of a three-stage type.

In FIG. 1, 1a indicates the upper breeding tank, 1b indicates the middle breeding tank, and 1c indicates the lower breeding tank.
For any breeding aquarium, a long type having no intermediate wall is used, and the length is usually 600 to 800 cm and the width is 90 to 120 cm. 2 is a water supply source. Reference numeral 3a denotes a sprinkler channel for supplying fresh water from the water supply source 2 over the entire length of the upper breeding aquarium 1a, using a watering pipe with holes drilled at regular intervals in a pipe with an open end. 4a is a valve provided on the upstream side of the sprinkler channel 3a. 5a, . . . are drain holes provided at intervals on the bottom of the upper breeding tank 1a, and 6a is a drain pipe extending below the bottom of the upper breeding tank 1a, and the drain hole 5a is provided in this drain pipe. It is communicated. 7a is the upper breeding tank 1a
A water level adjustment tank is disposed at one end of the tank, and a drain pipe 6a is connected to the water level adjustment tank. This water level adjustment tank 7a
A T-shaped pipe 71a is provided inside the T-shaped pipe 71a.
A short pipe 72a is pivotally attached to the shaft so that it can swing up and down. As will be described later, the water level is determined by the set position of the upper end of the short pipe, and the swing angle of the short pipe is adjusted to set the upper end position using a handle from outside the water level adjustment tank. 8 is a drain pipe, and the water level adjustment tank 7a
One end of a T-shaped pipe 71a is connected to this drain pipe 8 via a valve 81a. 3b is the middle breeding tank 1b
It is a watering channel that supplies breeding water along the entire length of the
A valve 9 is installed at the other end of the T-shaped pipe 71a of the upper water level adjustment tank 7a.
They are communicated via 1a. In this sprinkling channel 3b, water is supplied from the water supply source 2 to the upper breeding tank 1a through the watering pipe 3a of the upper breeding tank 1a, and the breeding water to which feed has been administered is drained from the drain hole 5a of the upper breeding tank 1a => water level of the drain pipe 6aa. Adjustment tank 7a=>Short pipe 72a#Valve 91. It is supplied via route L. A sprinkler mallet is used in this sprinkler channel 3b to avoid clogging with solid matter in the breeding water.

In Fig. 1, 5b, . . . are drainage holes provided at intervals on the bottom of the middle breeding tank 1b, 6b is a drain pipe extending under the bottom of the middle breeding tank 1b, and 7b is the middle breeding tank. This is a water level adjusting tank disposed at one end of the drain hole 5b, and the water level adjusting tank 7b is communicated with the drain hole 5b through a drain pipe 6b.

A T-shaped pipe 71b is provided in this water level yA adjustment tank 7b, a short pipe 72b is pivoted to this T-shaped pipe 71b so as to be able to swing up and down, and one end of the T-shaped pipe 71b is connected to a valve 8.
It is connected to this drain pipe 8 via 1b. 3c
is a sprinkling channel that supplies breeding water over the entire length of the lower breeding tank 1c, and is a T-shaped pipe 71 of the middle water level adjustment tank 7b.
b is communicated with the other end via a valve 91b. A sprinkler mallet is also used for this sprinkler channel 3c.

In Fig. 1, 5c, . . . are drainage holes provided at intervals on the bottom of the lower breeding tank 1c, 6c is a drain pipe extending below the bottom of the middle breeding tank 1c, and 7c is the middle breeding tank. This is a water level adjustment tank disposed at one end of the water tank 1c, and the water level adjustment tank 7c and the drainage holes 5c are communicated with each other by a drain pipe 6c.

72c is a short pipe provided in the lower water level adjustment tank 7c so as to be able to swing up and down, and is connected to the drain pipe 8 via a valve 81c. Nothing equivalent to valve 91a or 91b is provided.

In FIG. 1, 10a, 10b, and 10c are aeration pipes extending the entire length of the rearing tanks 1a, lb, and lc; 11. ... is a valve, and 12 is an air source. 31b and 31c are perforated water sprinkler pipes that spray fresh water from the water supply source 2 over the entire length of the middle breeding aquarium 1b and the lower breeding aquarium 1c, and are communicated with the water supply source 2 via valves 4b and 40, respectively.

In order to raise shellfish using the above-mentioned breeding device, short pipes 72a, 72b in each level water level adjustment tank 7a, 7b, 7c,
The upper end of 72c is set at a predetermined water level, and first, fresh water from the water supply source 2 is poured into each stage of breeding aquariums la, lb, and lc.
water is supplied from each sprinkler pipe 3a, 31b, 31c, and when each tier breeding tank 1a, lb, lc reaches a predetermined water level and each tier breeding tank 1a, lb, lc is filled with water, the middle tier breeding tank 1b and lc are filled with water. The supply of fresh water to the lower breeding water tank 11c is stopped by closing the valves 4b and 40, and only the supply of fresh water to the upper breeding water tank 1a is continued. In this case, since the upper ends of the short pipes in each stage water level adjustment tank are fixed, after filling with water to the above-mentioned predetermined water level, the water in the upper breeding tank 1a is drained to the drain hole 5 according to the amount of fresh water supplied.
a, ... and is pushed out into the water level adjustment tank 7a through the drain pipe 6a, and the water level is adjusted. j! 4′! The water flows down through the upper end of the short pipe 72a in 7a to the watering mallet 3b of the middle breeding tank 1b, and is further sprinkled from this water sprinkling tii3b to the middle breeding tank 1b. 5
b, ... middle drain pipe 6b gong middle stage water level U! 4 Tank 7b =>
Upper end of short pipe 72b of middle water level adjustment tank #lower breeding water #y1
It reaches the lower breeding tank IC through the watering mallet 3c of c, and finally, the drain hole 5c of the lower breeding tank 1c, . . . the drain pipe 6c.
#Lower water level adjustment tank 7cm>Short pipe 72c of lower water level adjustment tank
Water is discharged to the outside through the upper end of the valve (81 cm) and the drain pipe (8).

The airage by the airage arrangement f10a, 10b, 10c is carried out in a timely manner. In this way, natural flow occurs from the upper breeding tank 1a to the lower breeding tank 1c based on the height difference.

In the above, the flow in each stage breeding tank 1a, lb, lc is the drainage hole 5a,..., 5b,..., 5c...
Although the suction flow is centered on
, lb, and lc do not have intermediate partition walls, so it is possible to effectively eliminate flow stagnation at the lower end corners of both sides of the partition walls, which cannot be avoided when intermediate partition walls exist. In addition, each stage breeding tank 1
Since a plurality of drainage grooves are provided at intervals on the bottom surfaces of the a, lb, and lc tanks, and the drainage holes are distributed, it is possible to achieve a uniform flow within each stage of the breeding aquarium.

In the above, each drainage hole 5a,..., 5b,...
In order to equalize the amount of water sucked into each drain hole, it is preferable that the diameter of each drain pipe 6a, 6b, 6c is larger than the diameter of each drain hole 5a, 5b, 5c. Also, Kongming water pipes 3a and 31b.

31c as well, it is preferable that the diameter of the pipe be larger than the diameter of the water sprinkling hole in order to reduce the difference in the amount of water sprinkled depending on distance.

In the above embodiment, a plurality of breeding nets with frames are installed in each tiered breeding aquarium, and each tiered breeding aquarium and each tiered water level adjustment tank are mounted on the frame, but these nets, Illustrations of frames etc. are omitted.

In the above embodiment, a three-stage type is used;
As long as it is a multi-stage type, the present invention can be applied regardless of the number of stages.

(Effect of the invention) The shellfish breeding device of the present invention has the configuration as described above,
In breeding tanks that use a multi-stage gravity flow system to flow breeding water, we eliminate the middle partition in the breeding tank and distribute the drainage holes to ensure a uniform flow. Even if the height difference is small and the flow is a slow flow,
The occurrence of flow stagnation points can be well prevented, and therefore the interval between the upper and lower rearing tanks can be reduced, and the length of the rearing tank can be shortened by reducing the put space, and the whole rearing apparatus can be made compact.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a conventional example. la, lb, lc - Breeding water layer 2... water source, 12... air source 3a, 3b, 3cm watering channel 31b, 31cm watering pipe 5a, 5b, 5cm drainage hole 6a, 6b, 6c - drainage Tubes 7a, 7b
, 7c... Water level adjustment tank 10a, 10b, 1Oc - Aeration piping patent applicant Sekisui Chemical Co., Ltd. Representative Hiroshi 1) Kaoru

Claims (1)

[Claims] Multiple breeding tanks with no partition wall in the middle are arranged vertically, a water level adjustment tank is installed at one end of each breeding tank, and the topmost breeding tank is supplied with fresh water from the water supply source over the entire length of the breeding tank. A sprinkling channel is provided to sprinkle water over the area, and multiple drainage holes are provided at intervals on the bottom of each breeding tank, and these drainage holes are connected to each water level adjustment tank of each breeding tank via a drain pipe. A shellfish breeding device characterized in that the breeding aquarium is provided with a sprinkling channel for spraying breeding water over the entire length of the breeding aquarium from the directly above breeding aquarium through a water level adjustment tank of the directly above breeding aquarium.