RU2785720C1 - Dredge - Google Patents

Abstract

FIELD: mining equipment.

SUBSTANCE: invention relates to mining equipment, namely to a device for the development of alluvial deposits and technogenic accumulations of mineral raw materials by dredging. The dredge includes a pontoon and a multi-bucket working body. A curtain is installed perpendicular to the axis of the pontoon along its entire width, and the length of the curtain to the surface of the ephel dumps must correspond to the condition: L=D-P-E-0.5, m, where L is the length of the curtain, m; D - depth of the dredging section, m; P - draft of the pontoon, m; E - power of ephel dumps in the place of the curtain, m. The curtain is made of polyvinyl chloride (PVC) material and is cut lengthwise into equal strips over the entire area.

EFFECT: reduction of mineral dilution, as well as reduction of wear of the pipeline and pump from the ingress of fine particles.

2 cl, 2 dwg

Description

The invention relates to mining equipment, namely to a device for the development of alluvial deposits and technogenic accumulations of mineral raw materials by dredging.

A well-known dredge containing a pontoon, a working body - a scoop frame with a scoop chain, a loading chute, a dredging barrel, enrichment equipment, an unloading chute, a pebble belt stacker and efel decks (V.G. Leshkov Theory and practice of developing placers with multi-bucket dredges. M. Nedra , 1980 - p. 352).

However, when using this device, the mineral is diluted due to the ingress of fine soil particles of ephel dumps into the bottom of the dredge.

The closest technical solution with the claimed is a dredge (SU 1765304, IPC E02F 3/08, published 09/30/1992), containing a multi-bucket working body, a rotary working body, the main and additional transverse conveyors, a longitudinal conveyor, a pebble tray and a hopper with a rock release regulator and output tray.

However, when using this device, the efel particles do not have time to settle and enter the dredge pump, as a result of which the mineral is diluted and the wear of the pipeline and pump increases.

The main task is to develop a device that reduces the dilution of minerals in the process of mining the deposit.

This is achieved by the fact that in the dredge, including the pontoon, a multi-bucket working body, according to the invention, a curtain is installed perpendicular to the axis of the pontoon along its entire width, and the length of the curtain to the surface of the ephel dumps must correspond to the condition:

L=G-O-E-0.5, m, where

L - curtain length, m;

D - depth of the dredging section, m;

O - draft of the pontoon, m;

E - power of ephel dumps in the place of the curtain, m.

With a cut depth of 10 m and a dredge of 250DM, the length of the curtain to the surface of the dumps will be

L=10-2-1-0.5=6.5 m.

In this case, the length of the curtain will vary depending on the type of dredge and the depth of the cut. Also, the curtain should not be longer than the specified value, since then there is a possibility of its backfilling and an increase in pressure exerted on the structure, which in the future can lead to its destruction.

Particular features of the invention are also aimed at achieving a new technical result.

The curtain is made, for example, of polyvinyl chloride (PVC) material and is cut lengthwise into equal strips over the entire area. The general view of the device is illustrated graphically in Fig. 12.

Where: dredge 1, multi-bucket working body 2, pontoon 3, stern decks 4, dredge pump 5, plow blade 6, curtain 7, curtain strips 8, pipes 9, cargo hook 10, eye-loop 11.

The dredge 1 excavates the mineral with the help of a multi-bucket working body 2, laying the efel blade 6 along the stern decks 4 behind itself, while a curtain 7 is installed perpendicular to its axis to the pontoon 3, made of PVC material, which is fixed to the pipe 9 using a cargo hook 10 and eyelets 11.

The dredge, when working out the face and after the enrichment process, lays the efel dumps along the stern decks behind itself. The efel dump has an arcuate shape, due to the instability of the shape, fine particles are constantly mixed with the flow and dilution occurs in the bottomhole with efel particles. To prevent the dilution process created by the bottom flow, it is proposed to use a curtain of PVC material, consisting of strips, cut into equal strips over the entire area. The curtain serves as a barrier to the bottom flow, prevents the ingress of efel particles into the pump and the bottomhole, and allows accelerating the process of settling efel particles. The implementation of the curtain in the form of cut equal strips, over the entire area, provides a decrease in the specific pressure exerted by the fluid flow on the surface area of the curtain.

The proposed device will reduce the dilution of the mineral, as well as reduce the wear of the pipeline and pump from the ingress of fine particles.

Claims (7)

1. A dredge, including a pontoon, a multi-bucket working body, characterized in that a curtain is installed perpendicular to the axis of the pontoon along its entire width, and the length of the curtain to the surface of the ephel dumps must comply with the condition: L=G-O-E-0.5, m, where L - curtain length, m; D - depth of the dredging section, m; O - draft of the pontoon, m; E - power of ephel dumps in the place of the curtain, m. 2. Dredge according to claim 1, characterized in that the curtain is made of polyvinyl chloride (PVC) material and is cut lengthwise into equal strips over the entire area.

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