SU34390A1 - Device for collecting trawl of rock blasted under water during dredging - Google Patents

Description

And shaving refers to the area of dredging, and specifically to devices for scooping, with the help of a trawl blown up under rocky water. In this device, floats, fortified with bark, are applied, to which floats are attached blocks, through which cables are thrown, connecting the trawl with traction equipment. The use of floats is intended to alleviate the sharp increases in the forces acting on the trawl when it is hooked over the projections of the rock. The device also provides for the use of a number of floats tied to the bottom trawl cable to indicate the location of its engagement.

In FIG. 1 shows schematically a device in plan; FIG. 2- side yid; FIG. 3 - part of the trawl with floats.

In a deep place at the bottom 7, two bark 2 are lowered on cables, to the ends of which are attached floats 5 with a large lifting force. The blocks 4 for hauling cables 5, which are extended from the traction device 6, are fastened on them, blocks 4 and, being divided into the upper 7 and lower 8 branches, are attached to the lower and upper support ropes of the trawl 9.

The trawl is a metal mesh, Going along the top edge

(19th century)

the trawl is attached to the rope all the way over, at a short distance from each other, floats 10 with a total lifting force of about 0.7-0.8 loads of the trawl suspended in the water. Due to this, the net of the trawl touches the bottom, but is raised in a raised position. / The net of the ends of the net is placed floats (slightly larger) to support the ends of the cable 7.

Floats 77 are also attached to the bottom trawl cable, but with a small lifting force and installed on long branches of cables 72. They do not lift the trawl lower cable, but serve to follow the movement of the trawl peck bottom and facilitate the work in case of trawling the rock.

Installation and operation are as follows.

The floats 3 are installed in advance against the developed area A, in a deep place, somewhat further than the place where it is sufficient to push the ground. Traction devices 6 are installed against the floats on shore B or on the pontoon. Pesde explosives put a govt cable on the floats (the era can be left during the explosions, lowering it to the bottom) and throws over the; block 4 (the number of cables at least two). Tralov net lowers to the bottom

“Paradise plot -4. from the side opposite to the floats 3. The floats 70 under hold the net in a raised position, and the floats / 7 draw a trawl and depict the shape of the trawl at the bottom on the surface of the water. In the event of a sharp bend of this curve, the position of the floats will indicate that either the trawl has captured a large boot, or it has caught on: feces. In the latter case, from the duty barkas, a pull is made up on that small portion of the trawl that has hooked, and then the trawl is lowered again, and further work continues.

The role of the floats 3 is also the volume, then they relieve the tension of the pull cables with a sharp increase in the trawl response.

In order to facilitate the lifting of the trawl from the bottom and transfer it to a new place, it is advisable to use the floats 7 (9 of the next device. In the lower part of the float and on both sides of it (in the longitudinal direction) they are reinforced through tubes 75. The lower tubes all the time remain open; the lateral are connected by pieces of rubber hose M. The outer lateral tube of one of the ends of the trawl is tightly closed with a stopper, and the second end is connected with a rubber hose of sufficient length that goes to the compressor. water is forced out of them, it floats up. When air is released, the amount of th in the floats is already insufficient for keeping the trawl on the surface of the water, it sinks to the bottom and stands above it wall. Thanks to such a device, the trawl is easy Drift through the water on the desired rtecTo.

For TorOj so that the floats 77 and cables 72 do not get tangled when the trawl moves, 1 should be tied with a thin rope 75 to each other, but so that the total length of the cable (the rope was correspondingly greater than the length of the trawl).

:; .-.

The subject matter of the invention.

Claims (3)

1. A device for collecting trawl of rocky soil that was blasted under water during dredging, characterized in that, with the aim of reducing the efforts exerted on the trawl during engagement of the protrusion of the rock, floats 5 connected to the feed side of that side were used from the trawl, to which the ground is scooped, to which the floats are attached blocks 4, through which the hauling cables 5 are thrown, and the traction means are located on the opposite side of the floats from the trawl. 2. In the device according to claim 1, use floats 77, tethered cable 72 to the bottom trawl cable to indicate the location of its engagement over the rock. 3.Prch device according to PP 1 and 2, use JO soft hollow floats fixed on the upper trawl cable and interconnected by soft tubes D for inflating the floats in order to facilitate the rise of the ladder and transfer it from one place to another.