JPH0327174B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cleaning method for removing deposits adhering to the surface of shellfish using water pressure, and a cleaning device used therein.

[Conventional technology]

For example, pearl oysters used for pearl farming are placed in flat wire mesh cages so that they do not overlap each other after the kernels are inserted, and then hung on a raft in a place with good water circulation in a calm sea for 1 to 3 years. Feed for a while.
During this time, regularly clean the surface of the shellfish and the wire mesh to remove any epiphytes such as seaweed and barnacles that are parasitic on the shells.

The conventional method for cleaning shellfish involves lifting a basket containing pearl oysters from the sea and spraying seawater pumped into the basket with a hose. During this process, the hose was manually swung from side to side so that the water sprayed evenly onto the shellfish in the basket.

In recent years, the idea of mechanizing this manual cleaning method has been considered, and products have been commercialized that replace the manual movement of shaking the hose from side to side with machines.
It is used. The mechanism is to convert the rotation of a hydraulic motor into an oscillating motion of the tip of a nozzle, which injects high-pressure cleaning water toward the car.

However, since this conventional cleaning device uses a crank to convert the high-speed rotational motion of the hydraulic motor into oscillating motion of the nozzle, the vibration caused by the reciprocating motion is large, and when the direction of movement is changed, the crank and the Inertia in moving parts such as nozzles causes rapid wear and fatigue of mechanical parts, necessitating frequent replacement or repair of parts.

In view of these conventional problems, the present inventors have devised a method that can reduce the wear and fatigue of mechanical parts and arbitrarily adjust the spray pattern of the nozzle.

FIG. 1 is a front view showing a schematic configuration of a cleaning device according to the invention, FIG. 2 is a plan view taken along the - line in FIG. 1, and FIG. 3 is a side view.

In these figures, the main body 1 of the device includes a conveyor 2 for transporting the cages pulled up from the sea.
is installed. A hydraulic motor 3 is installed in the device body 1.
Branching device 18 for branching the rotational force of A upward and downward
is installed, and its rotational force is transmitted to the timing transmission wheel 4,
5, the signal is synchronously transmitted to driven vehicles 8 and 9 via timing belts 6 and 7. Driven vehicle 8, 9
are connected to the device main body 1 by bearings 10 and 11, respectively.
Nozzle bases 12, 13 rotatably supported on
is fixed to the rotating shaft.

These nozzle bases 12, 13 are disposed opposite to the upper and lower parts of the conveyor 2 driven by the hydraulic motor 3B, and have a required number of injection ports 12a, 13a. Further, the nozzle bases 12 and 13 are configured to be supplied with high pressure water via rotary joints 14 and 15. In addition, 16 in the figure is a car holding device for preventing the car conveyed on the conveyor 2 from being moved by the jetted water. Also,
As shown in Fig. 6, basket A has hanging steel 2 on base steel 20.
Since many are suspended by 1, the original steel 2
An opening 17 through which the hanging steel 21 passes is provided in the side of the device main body 1 so that the basket A can be washed while tied to the wire.

In addition to straight pipes, the nozzle bases 12 and 13 have a curved shape as shown by the dashed line in Fig. 2 to remove foreign substances such as seaweed that adhere to the nozzle bases. It can also be configured to be expelled outward by centrifugal force accompanying rotation. Furthermore, the nozzle base 12,1
3 does not have to be pipe-shaped, but can be Y-shaped, X-shaped, etc.
It can have a shape with a plurality of branches, and can also have a disc shape. The nozzles can also be arranged asymmetrically with respect to the center of rotation, rather than at regular intervals.

FIG. 4 shows a part of the nozzle head that sprays cleaning water. An arbitrary nozzle hole 12a is opened in the nozzle base 12 (same for the nozzle base 13), a nozzle head 12b is attached to the nozzle hole 12a to be used as shown in Fig. 4a, and a nozzle head 12b is attached to the nozzle hole 12a that is not used. By screwing and closing 12c, any ejection hole 12a can be selected and used. The cross-sectional shape of the spout of this nozzle head can also be arbitrarily set depending on the shape of the fountain.

A method for cleaning shellfish using the apparatus configured as described above will be described. A basket containing shellfish is guided to the entrance of the main body 1 of the apparatus, and the conveyor 2 conveys the basket at a predetermined speed. Nozzle bases 12 and 13 spout cleaning water at the top and bottom of the device body 1 while rotating, and when the basket passes through them, the pressure of the cleaning water removes algae and epiphytes that have adhered to the surface of the shellfish. be done. Since the positions and rotational speeds of the spout ports are synchronized, the washing water is sprayed from above and below at the shellfish at the same time, thus preventing the shellfish from moving within the basket. .

Figures 5 a to 5 c are simulations of the jetting trajectory of cleaning water when car A is used as a reference. It can be seen that the density of x of this curve,
The y-coordinate is the rotational angular velocity of the nozzle base as ω,
The radius of the jet nozzle from the center of rotation of the nozzle base is r
When the moving speed of the conveyor is v, it is expressed by the following equation.

x=r・cosωt+vt y=r・sinωt However, t is time.

Such a simulation is performed using a computer, and the moving speed of the conveyor and the rotational speed of the nozzle base are selected based on the optimum values obtained. Further, the water pressure of the washing water is selected and set at an optimum value depending on the type of shellfish housed in the basket, the degree of growth, etc.

[Problem that the invention seeks to solve]

However, as shown in Figure 6, basket A is
0 is suspended in a vertical position by hanging steel 21, so it is possible to bring them down to a horizontal position,
The process of inserting the steel 21 into the opening 17 becomes complicated, and a conveyor 2 is required to place and move the car A in a horizontal position, resulting in a complicated structure.

An object of the present invention is to solve the problems of the conventional cleaning device and to continuously clean the car A while keeping it in a vertical position.

[Means for solving problems]

In order to achieve the above object, the method for cleaning shellfish of the present invention involves placing a flat basket containing shellfish at a predetermined speed while hanging the shellfish in a vertical position on a hanging steel. The present invention is characterized in that deposits on the surface of the shellfish in the cage are removed by rotating a pair of nozzles synchronously and jetting water simultaneously from both sides of the surface of the shellfish in the cage.

Further, the cleaning device of the present invention includes a conveying device that conveys a basket containing shellfish at a predetermined speed while suspended from a hanging steel in a vertical position, and a device that faces both sides of the basket conveyed by this conveying device. a pair of nozzle bases that are installed in a state where the trajectory of the fountain ejected from the nozzles is driven to rotate in a circular manner; and a control means that independently adjusts the conveyance speed of the conveyance device and the rotation speed of the nozzle bases. It is characterized by having the following.

[Effect]

In the present invention, a cage containing shellfish is suspended from a hanging steel in a vertical position and is fed at a predetermined speed, while water is jetted from rotating nozzles placed on both sides of the cage toward both sides of the cage. The pressure of this water jet removes epiphytes and plants attached to the surface of the cage and the shellfish inside the cage.

At this time, water is sprayed synchronously from both sides of the basket containing the shellfish, minimizing the side-to-side sway of the basket suspended from the hanging steel, and the pressure of the sprayed water moves the shellfish inside the basket. prevent and perform effective cleaning.

The moving speed of the cage, the pressure of the jetted water, and the rotation speed of the nozzle base are arbitrarily set so that the cleaning water is sprayed from the nozzle evenly onto the shells and at an appropriate pressure. The optimal conditions for cleaning are
Since it also changes depending on the degree of growth of the shellfish, the moving speed, jetting pressure, and nozzle base rotation speed can be set to suit the optimum conditions.

〔Example〕

Hereinafter, the present invention will be specifically described with reference to embodiments of the cleaning device according to the present invention.

As shown in FIGS. 1 to 3, the cleaning device proposed earlier adopts a method in which the basket is conveyed in a horizontal position, whereas in the present invention, the basket is conveyed in a vertical position. That's what I do.

FIG. 7 shows how to use the same, in which a is a front view and b is a side view. As shown in FIG. 7, by hanging the car A by hooking the middle of the hanging steel 21 onto the hook 23 attached to the hanging rope 22 and moving the hanging rope 22, the device main body 1 mounted on the ship S can Shellfish in basket A can be washed continuously.

〔Effect of the invention〕

As described above, according to the present invention, a cage containing shellfish is hung vertically on a hanging steel and is fed at a predetermined speed while washing water is spouted synchronously from two opposing nozzles. This suppresses the shaking of the basket, and the cleaning water hits the shellfish in the basket from both sides at the same time, preventing the shellfish in the basket from being moved by high-pressure water. In addition, by independently adjusting or setting the transport speed of the basket, the rotation speed of the nozzle base, the jetting pressure of cleaning water, the cross-sectional structure of the nozzle, or the arrangement of the nozzle, cleaning is performed to suit the type and growth level of the shellfish. be able to.

This simplifies the process and structure compared to the method of washing the baskets by placing them on a conveyor, making it possible to streamline pearl cultivation, etc.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of a conventional cleaning device, Fig. 2 is a cross-sectional plan view taken along the - line in Fig. 1, Fig. 3 is a side view, and Fig. 4 is an example of how the nozzle head is attached. 5 is an explanatory diagram showing changes in the cleaning density distribution according to changes in the transport speed of the cage and the rotation speed of the novel base in the device, and FIG. 6 shows the suspended state of the cage during aquaculture. An explanatory diagram, FIG. 7, is an explanatory diagram showing a cleaning device and a cleaning method thereof according to the present invention. 1: Equipment body, 2: Conveyor, 3A, 3
B: Hydraulic motor, 4, 5: Transmission wheel, 6, 7: Timing belt, 8, 9: Driven wheel, 10, 11: Bearing, 12, 13: Nozzle base, 12a, 13
a: Injection port, 14, 15: Rotary joint, 16: Car holding device, 17: Opening, 18: Branching device, 20: Original steel, 21: Hanging steel, 22: Hanging rope, 23: Hook, A: Car .

Claims (1)

[Scope of Claims] 1. A flat cage containing shellfish is suspended from a hanging steel in a vertical position and is fed at a predetermined speed, while a pair of nozzles provided opposite to each other on both sides of the cage are rotated synchronously, A method for cleaning shellfish, characterized in that deposits on the surface of the shellfish in the cage are removed by simultaneously jetting water onto the surface of the shellfish in the cage from both sides. 2. A transport device that transports a basket containing shellfish at a predetermined speed while suspended from a hanging steel in a vertical position;
A pair of nozzle bases are installed opposite to each other on both sides of the car to be transported by the transport device, and are rotatably driven so that the trajectory of the fountain ejected from the nozzle draws a circle; A shellfish cleaning device characterized by comprising: control means for independently adjusting the rotational speed of each nozzle base.