JP2005110554A - Apparatus for conveying feed for culture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop an apparatus for conveying a feed for culture, with which transportation interruption of the feed by a bridge is surely prevented and the feed is stably supplied when the feed is transported by using a suction conveying pipe in culture of fishes and shellfishes. <P>SOLUTION: In the apparatus for conveying the feed for culture, with which the suction conveying pipe 17 is airtightly connected through an on-off valve 10 to the lower discharge port 11 of a feed tank 1 and an air suction means 22 is arranged at the other end side, the on-off valve 10 attached to the lower discharge port 11 of the feed tank 1 is the one of a type that is opened and closed by rotating a plate-like valve body 12 around a shaft 13. The on-off valve 10 is automatically controlled so as to be intermittently opened and closed during the suction of the feed for culture and the feed in the vicinity of the discharge port is provided with fluidity by suction force and stirring force by opening and closing action. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an aquaculture bait conveying apparatus.

  Conventionally, various feeding devices for automatically supplying food using a conveyor or the like have been proposed and implemented as a means for feeding cultured seafood in aquaculture such as an aquaculture pond or marine ikesu method (Patent Document 1). 2, 3).

In the above feeding apparatus, the feed supply tank 1 for storing the aquaculture feed or the feed supply tank 1 for supplying food to such a feed supply tank is normally narrowed in a funnel shape as shown in FIG. Feeding is automatically started and stopped by controlling opening and closing of the shutter 3 provided at the lower part of the hopper 2, and the necessary amount of food 4 to be discharged is cultivated by the conveyor 5 at the lower part of the hopper 2. It was designed to supply ikesu and feed tanks.
Japanese Patent Laid-Open No. 2000-4711 JP 2001-95418 A JP, 2001-45910, etc.)

  However, most of the bait used in aquaculture is processed as mince-like small fish such as salmon and salmon, or left as it is without being processed. Often done.

  For this reason, the bait 4 sticks to the narrowed portion 2a at the bottom of the hopper 2 due to its own weight or suction pressure. There was a problem that it often happened that the bait was not discharged.

  In particular, in the case of a system in which a suction conveyance pipe is connected to the lower part of the hopper and the bait is conveyed by air suction, the above problem is remarkable. In other words, this transport method can quickly transport a large amount of food by air suction, but there is a problem that it is necessary to always pay attention to a transport interruption accident due to a bridge.

  This invention solves the above-mentioned problems, and develops a culture feed transport device for aquaculture that can reliably prevent interruption of transport by a bridge and can stably supply food, particularly when transporting food using a suction transport tube. It was made as an issue.

  In order to eliminate the above-mentioned object, the present invention provides an aquaculture bait transport apparatus in which a suction transport pipe is airtightly connected to a lower discharge port of a bait supply tank through an on-off valve and an air suction means is provided on the other end side The open / close valve provided at the lower discharge port of the bait supply tank is an open / close valve of a type that opens and closes by rotating a plate-shaped valve body around the shaft, and the open / close valve is used for sucking aquaculture bait. It is characterized in that it can be automatically controlled so as to open and close intermittently, and fluidity is imparted to the bait in the vicinity of the discharge port by the suction force and the stirring force by the opening and closing operation.

  That is, in this aquaculture bait transport device, since the on-off valve intermittently opens and closes the filled bait while discharging the empty bait in the lower part of the feed tank, the bait sticking phenomenon is caused by this shock. It is forcibly released. Accordingly, the feed is prevented from bridging, and at the same time, the fluidity of the feed is restored, and the air is sucked and discharged from the opened gap of the valve. Moreover, since this operation is performed intermittently, even if the bridge phenomenon occurs, the fluidity is restored within a short time, and the food is not discharged even though the valve is open. Is resolved.

Next, an aquaculture bait conveying apparatus according to an embodiment of the present invention will be described.
FIG. 1 is an explanatory view of an aquaculture bait conveying device, FIG. 2 is a partially enlarged sectional view of an on-off valve, and FIG. 3 is an operation explanatory view thereof.

  In FIG. 1, the aquaculture bait transport device is installed in a ship such as a transport ship S, and a single or a plurality of feed supply tanks 1 for storing aquaculture bait 4 are provided in the hold as shown. And this bait | feed supply tank 1 is made into the hopper shape by which the lower part was narrowed like a funnel like the past, and the opening-and-closing valve 10 is provided in the lower discharge port 11 of this hopper 2. As shown in FIG.

  As shown in FIGS. 2 and 3, the on-off valve 10 is supported in such a manner that a plate-like valve body 12 is rotatable around a valve shaft 13 in a cylindrical casing forming a lower discharge port 11 of the hopper 2. As shown in FIG. 3, the plate-shaped valve body 12 is rectangular as shown in the figure, and the cylindrical casing of the lower discharge port 11 is configured so that the valve body 12 can rotate about the valve shaft 13. Further, as shown in FIG. 2, the horizontal height of the casing is H, and the casing height H from the axis of the valve shaft 13 of the discharge port 11 to the hopper 2 is equal to or less than the half width B of the valve body 12. When the valve body 12 is rotated, the outer edge 12 a of the valve body 12 is sized so as to protrude into the hopper 2.

  A drive device 14 such as a hydraulic motor that opens and closes is connected to the valve shaft 13 at one end. The drive device 14 is provided with a control device 15, and the opening and closing of the on-off valve 10 is controlled by a command from the control device 15. It is configured to be. Reference numeral 16 denotes a limit switch provided on the other end side of the valve shaft 13, which is provided to detect the opening / closing position of the valve body 12, and the opening / closing information of the valve body 12 detected thereby is sent to the control device 15. Is entered.

The hopper 2, the valve body 12, the valve shaft 13 and the like are made of stainless steel from the viewpoint of preventing corrosion.
In FIG. 1, a suction conveyance pipe 17 is airtightly connected to a casing below the hopper 2. In addition, an air injecting on / off valve 17a is provided at the start end portion of the suction conveyance pipe 17, and an air injecting on / off valve 17b is provided in the middle portion in the same manner, for air injection when the on / off valve 10 is closed. As open.

  An air suction means 18 is provided at the end of the suction conveyance pipe 17. In the case of the illustrated example, the air suction means 18 is composed of an air suction pump 22 connected to the temporary bait storage tank 19. That is, the end side of the suction conveyance pipe 17 is airtightly connected to the upper part of the side wall of the temporary food storage tank 19 installed on the deck of the transport ship S, and the air suction pipe 20 from the ceiling portion of the temporary food storage tank 19 to the outside is connected. The air suction pipe 20 is connected to a filter 21 and an air suction pump 22 at the other end. 22a shows a pressure gauge. In addition, 22b in a figure shows a silencer and is provided in order to suppress the exhaust sound from the exhaust port 22c provided in ship side S1, and is provided as needed.

  In addition, a level sensor 19 a for detecting whether the bait 4 is filled, for example, whether it is full or empty, or in the middle, is provided in the bait temporary storage tank 19, and the information is input to the control device 15.

  A bait 4 discharge gate 23 is provided in the lower part of the bait temporary storage tank 19, and this gate 23 can be opened and closed by a hydraulic cylinder device 24, and when closed, the gate is hermetically closed.

In the figure, reference numeral 25 denotes a bait discharging screw in the bait temporary storage tank 19, which can be rotated by a driving device 26 such as a hydraulic motor.
A hopper 27 is provided below the discharge gate 23, and a bait discharge conveyor 28 using a screw conveyor or a spring type conveyor is provided below the hopper 27. It is comprised so that the bait | feed 4 may be supplied to.

Next, the operation of the aquaculture bait transport device will be described.
FIG. 4 is an operation flowchart of the suction conveyance pipe of the aquaculture bait conveyance device, FIG. 5 (a) is a graph showing the opening / closing timing of the opening / closing valve, and FIG. 5 (b) is a side sectional view showing the opening / closing operation of the opening / closing valve. FIG. 6 shows an operation flowchart of the bait discharge side conveyor.

  When starting to supply bait, first, “closing” of the discharge gate 23 is confirmed, and the switch of the air suction pump 22 in FIG. 4 is turned ON. At this time, the food level in the temporary food storage tank 19 is detected, and if it is not full, the control device 15 starts to drive the air suction pump 22.

  Then, the pressure in the bait temporary storage tank 19 is reduced, and a suction force is generated in the suction transport pipe 17. Next, the on-off valve 10 of the bait supply tank 1 is opened. Thereby, the bait 4 in the bait supply tank 1 is sucked up to the bait temporary storage tank 19 through the suction conveyance pipe 17 and gradually accumulates in the storage tank 19. At the time of this conveyance, the on-off valve 10 repeats the closing and opening operations intermittently when a predetermined time elapses as shown in the graph of FIG.

  At the time of this opening / closing operation, the size of the valve body 12 is equal to or greater than the axial length of the casing of the discharge port 11, so that the action of stirring the bait 4 in the vicinity of the opening / closing valve 10 is performed. Combined with the work, a fluid shock is given to the bait 4 flowing down toward the discharge port 11.

  Therefore, even if the bait 4 is bridged or is about to rise in the hopper 2, fluidity is generated in the bait by the movement of the valve body 12, and a smooth flow is ensured. is there. When the food in the temporary food storage tank 19 becomes full, this is detected by the level sensor 19a. Based on this information, the opening / closing valve 10 of the food tank 1 is first closed, and then the food 4 remaining in the suction conveyance pipe 17 is detected. The air suction pump 22 is driven until it is completely carried into the bait temporary storage tank 19. In the illustrated flowchart, the setting time is 4 seconds.

Then, the air suction pump 22 is stopped by a command from the post-control device 15 after a certain time has elapsed.
Then, the next air suction pump 22 switch ON standby state is entered.

  In the above description, the case where the level in the temporary food storage tank 19 is not full when the air suction pump 22 is switched on has been described. If the air suction pump 22 is full, it is determined whether or not the air suction pump 22 is in operation. If it is not operating, it is determined whether or not the switch is ON. If the switch is ON, the routine closed to detect the level in the original temporary food storage tank 19 again.

  In any case, when the bait temporary storage tank 19 is full, the air suction pump 22 is stopped. Therefore, the discharge gate 23 is opened, the bait discharge screw is operated, the bait is dropped and supplied to the hopper 27, and the bait discharge conveyor 28. To feed food to the desired location.

  The feed is driven by the operation of the switch 30 at the end of the bait discharge conveyor 28, and the operation is performed in the feed temporary storage tank 19 by the switch ON of the discharge conveyor 28, as shown in the flowchart of FIG. It is determined whether it is empty. If it is not empty, the discharge conveyor 28 is activated and the discharge gate 23 is opened. As a result, the bait 4 is supplied from the hopper 27 to the discharge conveyor 28 and the bait is discharged. When the supply of the necessary amount of feed is finished, the operator turns off the switch 30 of the discharge conveyor 28. The discharge gate 23 is closed by this OFF, and the supply of the bait 4 is stopped. On the other hand, the conveyor 28 is continuously driven until the bait remaining on the conveyor 28 is completely discharged, and then the conveyor 28 is stopped. In the illustrated example, 2 seconds is shown as the continuous drive time after the discharge gate 23 is closed.

  If the bait temporary storage tank 19 is empty and there is no bait inside when the discharge conveyor 28 is switched on, the air suction pump 22 is activated, and the bait is operated in the same routine as the switch ON of the air suction pump 22 shown in FIG. Supply from the tank 1 is performed.

  In the above embodiment, the operation in the case of supplying food from one food tank 1 has been described, but it is also possible to supply food from two food tanks 1. However, the operation differs depending on whether the types of food in the two food tanks 1 are the same or different.

  That is, when the foods in the two food supply tanks 1 are different, the food 4 in the suction conveyance pipe 17 is sucked into the food temporary storage tank 19 after closing the on-off valve 10 of the first food supply tank 1. As shown in FIG. 4, for example, the air suction pump 22 is operated until 4 seconds elapse, and then the air suction pump 22 is stopped. When the bait in the bait temporary storage tank 19 runs out, the operation of the air suction pump 22 is resumed, then the opening / closing valve 10 of the second bait supply tank 1 is opened and the bait 4 in the second bait supply tank is temporarily It is sucked into the storage tank 19.

As a result, the two types of baits 4 and 4 are supplied without being mixed.
And although illustration is abbreviate | omitted, when three or more bait tanks 1 ... are provided side by side, when the on-off valve of one tank is open, all the on-off valves 10 of other tanks are operated in the closed state. In the case where different baits are supplied, the baits are supplied to the respective bait supply tanks 1 by the same operation as described above.

  In the case of the same type of bait, the on / off valve 10 of the first bait tank 1 may be closed and the on / off valve 10 of the second bait tank may be opened while the air suction pump 22 is operating. In this case, there is no problem even if the food is mixed.

It is explanatory drawing of the aquaculture bait conveying apparatus which is embodiment of this invention. It is sectional drawing of the hopper part and opening / closing valve of a bait tank. It is the sectional view on the AA line of FIG. It is an operation | movement flowchart of the suction conveyance pipe | tube of a culture feed conveyance apparatus. (A) is a graph showing the opening / closing timing of the on-off valve, and (b) is a side sectional view showing the opening / closing operation of the on-off valve. The operation | movement flowchart of a bait | feed discharge side conveyor is shown. It is explanatory drawing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS S Carrier ship 1 Feed supply tank 2 Feed tank lower part 4 Feed 10 Opening and closing valve 11 Discharge port 12 Plate-shaped valve body 13 Valve shaft 14 Drive apparatus 15 Control apparatus 16 Limit switch 17 Suction conveyance pipe 18 Air suction means 19 Feed temporary storage tank 19a Level sensor 20 External air suction pipe 22 Air suction pump 23 Bait discharge gate 24 Hydraulic cylinder device 25 Bait discharge screw

Claims (4)

In an aquaculture bait conveying apparatus in which a suction conveyance tube is connected to the lower discharge port of the bait supply tank in an airtight manner via an on-off valve, and an air suction means is provided on the other end side, the lower discharge port of the bait supply tank The provided on-off valve is a type of on-off valve that opens and closes by rotating a plate-like valve body around the shaft, and this on-off valve can be automatically controlled to open and close intermittently during aspiration of aquaculture bait An aquaculture bait conveying apparatus characterized in that fluidity is imparted to bait in the vicinity of the discharge port by suction force and stirring force by opening and closing operation. A feed temporary storage tank is airtightly connected to the other end of the suction transport pipe of the aquaculture bait transport device according to claim 1, and a pump for sucking air in the tank is connected to the temporary feed storage tank to temporarily store the feed. A feed feed apparatus for aquaculture, comprising a feed discharge gate provided at a lower portion of the tank, and a transport conveyor for feeding the feed to a target feeding location. 3. The aquaculture bait transport device according to claim 1 or 2, wherein when feeding the aquaculture bait from the supply tank is stopped, the bait in the suction conveyance pipe is moved to the other end side after closing the opening / closing valve of the lower supply tank discharge port. An aquaculture bait conveying device controlled to continue air suction by the air suction means until it is sucked and discharged. The culture bait conveying apparatus according to claim 1, 2, or 3, wherein a plurality of aquaculture bait supply tanks are connected in parallel to the suction conveyance pipe, and the on-off valves provided at the lower parts of the supply tanks are interchangeably used. An aquaculture bait transport device configured to be opened and closed.

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