SU973092A1 - Device for collecting mollusks - Google Patents

Description

(54) DEVICE FOR PRODUCTION OF MOLLUSCES

one

The invention relates to the fishing industry, in particular to devices for the extraction of marine mollusks, such as scallops.

A device for the extraction of mollusks is known, comprising a netted bag towed over the ground on a sled and teeth located in front of its inlet to loosen the ground 17).

Such devices cause significant damage to seabed organisms.

It is also known a device for the extraction of mollusks, consisting of a sled with a bunker mounted on them for collecting mollusks and devices for loosening the seabed and tearing off the mollusks made in the form of hoses connected to a water or air supply system 2.

The known device is cumbersome in its dimensions and its operation is costly, since for its maintenance on the vessel a power take-off for the pump and the compressor and an additional area for arranging this equipment is required.

The closest to the proposed technical essence and the achieved result is a device for the extraction of mollusks, including a sled for moving around the ground, a 5 bunker for collecting mollusks mounted on them and guide plates mounted in front of the sled 3.

The known device is also equipped with a knife for cutting the soil, which leads to injury to the mollusks and, in addition, complicates the process of extraction, since it is further required to separate the mollusks from the soil particles.

The purpose of the invention is to facilitate the removal of mollusks from the soil and the elimination of their injury.

In order to achieve this goal, a known device for the extraction of mollusks, including a sled for moving on the ground, a bunker mounted on them

20 clams collection and guide plates mounted in the front part of the slide to form water flows, equipped with a chamber for detaching the mollusks from the ground, placed between the guide plates and the bunker and adjacent to the latter, the guide plates are fixed across the longitudinal axis of the device with a slope to the side an additional plate is fixed above the guide plates to compensate for the effect of the lifting force arising in the process of towing, mounted with an inclination to the side olozhnuyu tilt guide plates.

FIG. 1 shows the proposed device, side view; in fig. 2 - the same, top view.

The device for the extraction of mollusks consists of a sled 1 for moving on the ground, a bunker 2 mounted on them with a selection 3 located above the ground at a height not higher than 30 m m, mounted in the forward part of the sled 1 of the guide plates 4, and a separation chamber 5 mollusks from the ground, located between the guide plates 4 and the hopper 2 and adjacent to the latter, while the guide plates 4 are strengthened across the longitudinal axis of the device with an inclination towards the chamber 5, and above them is fixed an additional plate 6 to compensate for vi occurs during towing lift device mounted with an inclination opposite to the inclination of the guide plate 4. Furthermore, the device is equipped for fixing frames 7 towing warps.

The guide plates 4 are mounted to rotate up to 13 ° depending on the object of production.

The chamber 5 for the separation of mollusks from the ground can be formed by the walls of the sled 1 and the horizontal plate 8 forming its upper part (the lid). The chamber 5 in front of the hopper 2 has an expanding part by raising a portion of the plate 8 when it passes into the hopper. The angle of elevation is 6 °, which corresponds to the angle of the maximum flow rate of water when flowing through the jet nozzles.

The device works as follows.

From the deck of the mining vessel, the clam diving device is lowered with warps to the bottom. When towing the device along the bottom, the flow of water that runs onto the guide plates 4, due to their inclination, deviates towards the ground. The deflected jet pressure increases with increasing speed. Rejected stream of water, loosening the soil, opens the object of production from the bottom. The angle of inclination of the plates 4 is adjusted depending on the object of extraction. When mining trepang, starfish and other organisms on the surface, the inclination of the plates 4 is insignificant, and the stream knocks down organisms on the ground surface. When mining, for example, offshore crib slope steeper, providing soil loosening.

Action lift generated by

plates 4, is compensated by the opposition plate 6, installed with a slope

sufficient for pressing the sled 1

to the ground.

When the device moves along the bottom of the plate 4, the incident flow is deflected towards the bottom, the soil is loosened. Besides,

0 plate 4, located directly in front of the hydrodynamic chamber 5, deflects elementary trickles from their parallel movement.

As a result of the non-parallel movement of elementary streams in front of chamber 5, the water flow is compressed and the pressure in the chamber itself decreases, as a result of which an additional lifting force occurs when the device moves to marine organisms. So the object

0 production, lifted from the bottom by plates 4 and chamber 5, falls into a receiving hopper 2, made mesh with a mesh size corresponding to the minimum marketable size of the object.

The mined object is taken aboard.

 vessel or with the device, or other known methods.

Thus, stable operation of the device at any depth is achieved, frontal resistance is used to improve the useful work of soil loosening. Increasing the dredging speed increases operational reliability and productivity. The collection of marine organisms is carried out without the use of pumps, hoses, and additional energy.

The absence of metal parts that are buried in the ground — teeth, knives — allows the collection of mining objects with minimal harm to the inhabitants of the seabed.

The expected technical and economic effect of the clam collection device is to reduce the cost of the servicing vessel, energy consumption and additional mechanisms while reducing the harmful effects on the bottom organisms. The cost of dredging is reduced by 1.5 times.

Claims (3)

1. A device for extracting mollusks, including a sled for moving around the ground, a bunker mounted on them for collecting mollusks and guide plates mounted in the front of the sled for forming water flows, characterized in that, in order to facilitate the removal of the mollusks from the ground and to exclude them injury, it is equipped with a camera for the separation of mollusks from the ground, placed between the guide plates and the bunker and adjacent to the latter, the guide plates are reinforced. The device was crossed across the longitudinal axis with an inclination towards the chamber, and an additional plate was fixed above the guide plates to compensate for the lifting effect force, installed with a slope in the direction opposite to the inclination of the guide plates. Sources of information taken into account in the examination 1. US Patent No. 4112602. Cl. publish 1978 2. US patent No. 3184866, CL. 37-55, published. 1965. 3. USSR author's certificate J4o 227010, cl. A 01 K 75/00, 1967. // iV T Phie.1 eight Fie.2