JPS60232046A - Sorting of shellfishes - 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] The present invention relates to a method for sorting shellfish.

When shellfish are collected, they are found to contain a mixture of shells, sand, pebbles, and dead shellfish, and some contain muddy sand that is difficult to distinguish from live shellfish just by looking at them.

Conventionally, these selections have been performed exclusively manually using primitive methods, which are extremely inefficient. Moreover, it is still far from perfect, and there are many complaints about dead shellfish being mixed in when it reaches consumers.

In view of the above problems, the present invention aims to separate live shellfish, dead shellfish, and other shellfish very efficiently by using a harmless stock solution with an appropriate specific gravity.

The stock solution used in the present invention is a solution in which potassium carbonate (%cO3) is dissolved in water, and salt water is mixed in if necessary. Specifically, 5 f of subacid potassium 11B was dissolved in 100 QC of water to give a liquid ratio of 1.54. Since this liquid caused the mixture to float too much, 15% salt water was mixed in. This will be adjusted accordingly.

FIG. 1 is a schematic sectional view of the apparatus used in the present invention, in which 1° is a sorting tank and 2 is a hopper into which shellfish 3 are charged. On the vine, 2a is a front opening/closing gate, 4 is a receiving plate, which is provided facing the direction in which the undiluted solution flows, and the bottom of the sorting tank is an inclined surface that partially rises along the direction in which the undiluted solution is combed. 1b, and the lower part of the receiving plate 4 in the opposite direction is formed into a recessed chamber IC. 5 is the above selection +1
i A liquid separation tank that is continuously provided at the front side position of 1 and rotates the net conveyor 6 upward from the side of the sorting tank 1 within a certain internal length range in the length direction. The shellfish 3 that overflows the edge p of the sorting tank 1 while the foot 9 is rotated falls onto the wire mesh conveyor 6, and is drained in the process of moving from the lower side to the higher side. shi is now being carried out.

Reference numeral 7 denotes a circulation tank provided below the liquid separation tank, in which the raw liquid from the liquid separation tank 5 flows down, and the liquid in the tank 5 is sorted through the pump 8. (It is made to flow out again from the rear position of the shellfish supply hopper 2 in the party 1 toward the receiving plate 4, and 9 is a circulation pipe for that purpose.

Reference numeral 10 denotes a stock/liquid tank, and the stock solution is not stored in the tank, but is supplied in a necessary constant amount to the circulation tank 7 via a supply pipe 11 and a pulp 12. There is. In addition.

Reference numeral 13 is a return pipe for returning the circulating liquid from the circulation pipe 9 when it becomes partially excessive, and 14a and 14b are pulp.

15 is a washing tank, and a wire mesh conveyor of the liquid separation tank 5
6 Shellfish 3 falling from the edge are received on the starting end side of the horizontal conveyor 16, and while the conveyor is in progress, the final washing process is performed with a water shower 17, and the container 1 is placed at a lower position on the terminal end side.
8 so that it falls into the container. The container 18 is placed on a carrier 19, and when the container is full, the carrier moves intermittently on the rails. Note that 20 is a pipe for circulating the stock solution in the sorting tank 1 into the circulation tank 1, and a filter device 21 and a pulp 22 are provided in the middle of the eel pipe. Also, 23 is waste oil.

Next, the effect will be explained. Initially, shellfish 3 are introduced into the hopper 2 with the gate 2a of the supply hopper 2 being closed. Next, the valve 12 is opened into the circulation tank 7 to supply the stock solution from the stock solution tank 10, and when the liquid level in the tank reaches a certain position, that is, the e-line position in the illustrated example, the pump 8 is driven to The circulation pipe 9 feeds through the hopper 2
Pump up the pulp I while pumping it up towards the back side of the eggplant.
4 and the gate 2a are opened to allow the shellfish 3 in the hopper 2 to flow into the sorting tank 1 together with the stock solution.

At this time, the shellfish 3 slide on the receiving plate 4 and flow into the sorting tank 1, but the raw shellfish are not in a suspended state in the undiluted solution and flow in the direction of the arrow (force) with the flow of the undiluted solution. Sand, pebbles, and dead shells are gradually sorted out from those that do not float, and they settle in the opposite direction to the direction in which live shellfish travel, that is, along the sloped bottom, toward the concave chamber 1c, and are stored in the chamber. Become so.

On the other hand, the raw shellfish overflows from the tip P along with the flow of the raw solution, falls onto the wire mesh conveyor 6 of the liquid separation tank 5, and is transported upwardly in the direction of the arrow by the drive of the conveyor 6. Then, while being conveyed on the horizontal conveyor 16 to the washing tank 15, the final washing process is performed in the washing shower 17, and the product is stored in the container 18.

At this time, the raw liquid from the sorting tank 1 that flows into the liquid separation tank 5 flows into the circulation tank 7, and is pumped up and circulated by the pump 8 to the feeding hopper 2 side. The liquid level in the tank is a certain distance lower than that at startup, that is, at the f-line position in the illustrated example. If the liquid level drops below the f-line position, the pulp 12 is opened and the stock solution from the stock solution tank 10 is refilled.

On the other hand, when a certain amount of shells, pebbles, etc. are stored in the concave chamber 1δ, the pulp 22 is opened while the gate 2a is closed and the operation of the entire apparatus is stopped, and the raw solution in the sorting tank 1 is filtered. The oil is refluxed into the circulation tank 7 through the device 21, and the bottom plate 1d of the recessed chamber 1c is opened to allow the accumulated material in the chamber to fall into the waste oil 23 disposed at a lower position. Then, the bottom plate 1d is closed, the pulp 22 is closed again, and the same operation as described above is resumed.

Some of the above equipment may be operated manually.

Or it can be done completely automatically. Although this device is a relatively large-scale device for sorting large quantities for commercial use, there is no problem in making it smaller with appropriate modifications.

When carrying out the present invention, dead shellfish may float if they contain air, so as a pretreatment, they are placed in a chamber with water and subjected to reduced pressure and positive pressure several times. It is a good idea to let the air out.

As described above, the present invention uses a stock solution in which potassium carbonate is dissolved, and is capable of very efficient sorting, resulting in a dramatic improvement in work performance.

[Brief explanation of the drawing]

The accompanying drawings are schematic illustrations of an apparatus for carrying out the method of the invention. 1... Sorting [2... Hopper 4...
...Brace plate 5 ...Liquid separation tank 6 ...Wire mesh conveyor 7 ...Circulation tank 8 ...Pump 10 ...Standard solution tank 15 ...Washing tank
17...Flush shower 18...Container 19
...Transportation trolley patent applicant Yoshisumi Orikawa Representative patent attorney Minoru Kuma, ゛・]

Claims (1)

[Claims] (1) Dissolve a certain amount of potassium hydroxide in water and add the shellfish to a stock solution with a certain specific gravity, mixing with salt water if necessary. A method for sorting shellfish, characterized by sorting them by floating them.