JP2006191803A - Aeration system in fish-breeding tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for carrying out stable aeration in a fish-breeding tank so that running cost is reduced by utilizing flowing water from a water source as a power source for a blower for the aeration and fishes are not killed even in emergency such as a water shortage state of the water source. <P>SOLUTION: In the aeration system in the fish-breeding tank, a water wheel 5 and the blower 5 are rotated with a water stream led down from the water source 1 to feed water into the fish-breeding tank 4 and carry out the aeration. An induction motor 8 is rotated synchronously with the rotation of the water wheel 5 and the blower 6 at a synchronous rotational speed thereof or above to thereby accumulate generated power in an accumulator 17. When the water stream from the water source 1 is interrupted, the power is fed from the accumulator 17 to the induction motor 8 and drive the blower 6. Thereby, the aeration in the fish-breeding tank 4 is continued. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an aeration system in a fish tank.

  A blower is generally used as an aeration device into a fish tank. Moreover, in order to keep the water quality of the fish tank constant, fresh water always flows from neighboring rivers through intake pipes. As a known example, external power is supplied to rotate an alternator to drive a blower directly connected to the motor to cause aeration in the fish tank (for example, see Patent Document 1). However, according to this method, when power supply to the AC motor is stopped, such as during a power failure, the blower is immediately stopped, the oxygen supply to the fish tank is cut off, and the cultured fish is killed. Moreover, the electric power for always driving an alternating current motor is required, and a running cost will increase.

  As another known example, a turbine is turned using natural energy generated by overflow water, and a blower connected to the turbine is driven to perform aeration (for example, see Patent Document 2). However, in this method, since the water wheel does not rotate during drought or when the water level drops, the blower is not driven and the oxygen supply is stopped, resulting in the death of the living organism.

JP-A-6-209675 (FIG. 1) JP-A-6-182372 (summary)

  The problem to be solved is to use running water from the water source as the power source of the aeration blower to reduce the running cost and not to kill the fish even in an emergency such as a drought of the water source Thus, it is to provide a system in which stable aeration is performed in a fish tank.

  In the present invention, the water turbine and the blower are rotated by the water flow guided through the flow sensor from the water intake provided in the water source so that the water is supplied to the fish tank and aeration is performed. The electric power generated by rotating the induction motor in synchronization with the synchronous rotation speed or higher is stored in the power storage device via the power control unit in the controller, and when the water flow from the water intake is interrupted, the flow sensor Is transmitted to the power control unit via the signal control unit in the controller, and the induction motor is fed from the power storage device to drive the blower to continue the aeration in the fish tank and stored in the power storage device. When power is exhausted, aeration is performed in the fish tank by supplying power from the external power supply to the induction motor of the blower via the power control unit in the controller and driving the blower. The most important feature that causes.

  According to the present invention, even when the water flow from the water intake is interrupted due to drought of the water source or a drop in the water level, the blower continues to operate using the power stored in the power storage device based on the transmission signal from the flow sensor. As a result, killing of cultured fish due to lack of oxygen can be prevented. Moreover, even if the power stored in the power storage device is exhausted, the blower can be continuously operated by temporarily supplying power from an external power source to prevent the death of cultured fish due to lack of oxygen. It is also possible to perform treatment such as connecting. The use of an external power supply is urgent. Basically, the drive source of the blower is clean energy by natural force, so it is non-polluting without emitting CO2, etc., and requires less electricity usage. This contributes to cost reduction, and the surplus power can be used for other electric loads in the field or sold to an electric power company.

  The water turbine and blower are rotated by the water flow guided through the flow sensor from the water intake provided in the water source to supply and aerate the water to the fish tank, and are guided in synchronism with the rotation of the water turbine and blower. The electric power generated by rotating the electric motor at the synchronous rotation speed or higher is stored in the power storage device via the power control unit in the controller, and when the water flow from the water intake is interrupted, the transmission signal from the flow sensor is The power is transmitted to the power control unit through the signal control unit in the controller, and the blower is driven by supplying power to the induction motor from the power storage device to continue aeration into the fish tank, and the power stored in the power storage device is used up. When this occurs, aeration is performed in the fish tank by supplying power from an external power source to the induction motor of the blower via the power control unit in the controller to drive the blower. Further, the detection signal from the dissolved oxygen detector immersed in the fish tank is processed by the signal control unit in the controller and commanded to the power control unit, and the blower operation control is performed based on the command. Keep the dissolved oxygen amount in the tank at an appropriate value.

  In FIG. 1, 1 is a water source, 2 is a water intake provided in the water source 1, 3 is a water intake pipe that is guided from the water intake 2 and opens into the fish tank 4, and 5 is an intermediate part of the water intake pipe 3. The rotating shaft end is connected to one rotating shaft end of the blower 6 via an electromagnetic coupling 7a, and the other rotating shaft end of the blower 6 is connected to an induction motor via another electromagnetic coupling 7b. 8 is connected to the end of the rotary shaft. The induction motor 8 is connected to a power control unit 11 incorporated in a separately installed controller 10 by a power cable 9a, and the power control unit 11 is connected to an external power source 12 (commercial power source, private power generator, etc.) by another power cable 9b. It also serves as a power receiving panel. An air diffuser 14 is attached to the tip of the air pipe 13 led out from the blower 6 and guided into the fish tank 4. The electromagnetic couplings 7a and 7b are connected to a signal control unit 16 built in the controller 10 by control cables 15a and 15b, respectively. 17 is a power storage device connected to the power control unit 11 by a power cable 9c, 18 is an emergency light connected to the power storage device 17 by a power cable 9d, and 19 is an electric loader connected to the power control unit 11 by a power cable 9e. It is. Reference numeral 20 denotes a flow sensor that is guided from the intake port 2 and is provided in the middle of the intake pipe 3 that reaches the water turbine 5. The flow sensor 20 is connected to the signal control unit 16 in the controller 10 by a signal cable 21 a. .

  In the above-described configuration, during normal times, the water turbine 5 is rotated by the natural energy of water generated by the head between the water source 1 and the water turbine 5, and the blower 6 connected to the end of the rotating shaft via the electromagnetic coupling 7a is driven. Then, air is sent to the air diffuser 14 through the air supply pipe 13, and aeration in the fish tank 4 is performed. At this time, since no electric power is supplied to the induction motor 8, the blower 6 and the induction motor 8 are in a circulating state via the electromagnetic coupling 7b. In this co-rotating state, if the head of the water source 1 and the water turbine 5 have a large head and there is sufficient water flow energy, the induction motor 8 is forcibly rotated at the synchronous rotational speed or higher, In parallel with the aeration by the blower 6, the power generation by the induction motor 8 is also performed at the same time, so that a sufficient water flow state signal is sent from the flow sensor 20 attached to the water intake officer 3 via the signal cable 21 a. When the command processed by the signal control unit 16 is sent to the power control unit 11, the generated power is sent to the power control unit 11 of the controller 10 through the power cable 9a. To the power storage device 17 connected by the power cable 9c. Further, surplus power can be supplied to another electric loader 19 in the field through another power cable 9e, or can be sold to an electric power company by being transmitted to the external power source 12 through the power cable 9b. During power generation by the induction motor 8 described above, power supply from the external power source 12 is not received, which contributes to power saving.

  If the water source 1 falls into a drought state or the intake pipe 3 is damaged due to some accident and the flow of water in the pipe stagnate, the water turbine 5 cannot be driven, and the blower 6 is normally stopped at the same time. . However, at this time, the signal from the flow sensor 20 is processed by the signal control unit 16 in the controller 10 via the signal cable 21a, and an OFF signal is transmitted to the electromagnetic coupling 7a via the control cable 15a. Therefore, the electromagnetic coupling 7a is disconnected, but the other electromagnetic coupling 7b remains connected, and at the same time, a command is sent from the signal control unit 16 to the power control unit 11 to be stored in the power storage device 17. The system is switched to a system for operating the induction motor 8 at the rated rotational speed using the stored electric power. Therefore, the blower 6 is driven together with the induction motor 8, and the aeration of the fish tank 4 is performed without interruption even in an emergency. Even if the power stored in the power storage device 17 is exhausted, the power control unit 9 in the controller 10 is switched to the external power source 12 through the power cable 9b, and the blower 6 is continuously operated. It is possible to avoid stopping aeration even in an emergency.

  When the water flow from the water source 1 is restored, the signal from the flow sensor 20 is processed by the signal processing unit 16 in the controller 10 through the signal cable 21a, and is transmitted to the electromagnetic coupling 7a through the control cable 15a. An ON signal is transmitted. Therefore, the electromagnetic coupling 7a is connected, and at the same time, a command is sent from the signal control unit 16 to the power control unit 11, so that the power supply to the induction motor 8 from the power storage device 17 or the external power source 12 is stopped, and the water turbine The system returns to the system in which the blower 6 is operated in synchronization with the rotation of 5.

  On the premise of the configuration of the first embodiment, reference numeral 22 denotes a dissolved oxygen detector immersed in the fish tank 4, which is connected to the traffic signal controller 16 built in the controller 10 by a signal cable 21 b. When the signal sent from the dissolved oxygen detector 22 to the traffic signal controller 16 via the signal cable 21b exceeds a preset value, the electromagnetic couplings 7a and 7b are connected to the electromagnetic couplings 7a and 7b via the control cables 15a and 15b. An OFF signal is transmitted, the electromagnetic couplings 7a and 7b are disconnected, and the blower 6 stops. When the amount of dissolved oxygen in the fish tank 4 decreases and falls below the set value again, an ON signal is transmitted from the signal control unit 16 to the electromagnetic couplings 7a and 7b via the control cables 15a and 15b, and the electromagnetic couplings 7a and 7b again. The blower 6 is connected and aeration is performed. In this way, by controlling the operation of the blower 6 based on the signal from the dissolved oxygen detector 22, the amount of dissolved oxygen in the fish tank 4 is maintained at an appropriate value.

  Further, when the blower 6 and the induction motor 8 are in a circulating state, the water level of the water source 1 is low and the drop with the water turbine 5 is small, so that the energy of a predetermined water flow cannot be secured and the dissolved oxygen in the fish tank 4 is less than the set value. In this case, a signal indicating that the amount of dissolved oxygen is insufficient and transmitted from the dissolved oxygen detector 22 immersed in the fish tank 4 through the signal cable 21b and an insufficient water flow state transmitted from the flow sensor 20 through the signal cable 21a. The signal is sent to the signal control unit 16 in the controller 10, processed by the signal control unit 16, an OFF signal is transmitted to the electromagnetic coupling 7 b through the control cable 15 b, the electromagnetic coupling 7 b is disconnected, and the induction motor Since the load on the blower 6 is reduced by stopping the power generation of No. 8, the water flow energy from the water turbine 5 is fully used for aeration. Again, even if the amount of dissolved oxygen in the fish tank 4 recovers to a set value or more, the electromagnetic coupling 7b continues to be disconnected until a sufficient water flow signal is transmitted from the flow sensor 20. is doing. If the dissolved oxygen amount in the fish tank 4 does not recover to the set value or more even after a predetermined time has elapsed, an ON signal is transmitted from the signal control unit 16 to the electromagnetic coupling 7b that was originally disconnected. On the other hand, an OFF signal is transmitted to the electromagnetic coupling 7a that has been originally connected to be disconnected, and a signal for supplying power to the induction motor 8 from the power storage device 17 or the external power source 12 to the power control unit 11 is also received. Since the transmission is transmitted, the induction motor 8 rotates at the rated rotation speed, and the blower 6 performs proper aeration without interruption, so that the amount of dissolved oxygen in the fish tank 4 is restored to the set value or more.

It is a systematic diagram of the system of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water source 2 Water intake 4 Fish tank 5 Water wheel 6 Blower 8 Induction motor 10 Controller 11 Electric power control part 12 External power supply 16 Traffic light control part 17 Power storage device 20 Flow sensor 22 Dissolved oxygen detector

Claims (2)

  The water turbine and blower are rotated by the water flow guided through the flow sensor from the water intake provided in the water source to supply and aerate the water to the fish tank, and are guided in synchronism with the rotation of the water turbine and blower. The electric power generated by rotating the electric motor at the synchronous rotation speed or higher is stored in the power storage device via the power control unit in the controller, and when the water flow from the water intake is interrupted, the transmission signal from the flow sensor is The power is transmitted to the power control unit through the signal control unit in the controller, and the blower is driven by supplying power to the induction motor from the power storage device to continue aeration into the fish tank, and the power stored in the power storage device is used up. When this occurs, aeration is performed in the fish tank by supplying power from an external power source to the induction motor of the blower via the power control unit in the controller and driving the blower. Wherein the aeration system in fish farming tank.   A dissolved oxygen detector is immersed in the fish tank. The detection signal from the dissolved oxygen detector is processed by the signal control unit in the controller and commanded to the power control unit. The aeration system in a fish tank according to claim 1, wherein the amount of dissolved oxygen in the fish tank is maintained at an appropriate value by performing control.

Images