SU1745830A1 - Earth-intake device of suction-tube dredge - Google Patents

Abstract

Use: development of the ground dredger house in the underwater slaughter. SUMMARY OF THE INVENTION: The device comprises a suction tube with a tip concentrically located outside. The lower end of the suction pipe is equipped with arc elements for cleaning the device from oversize inclusions. The lower end of the tip has a three-dimensional array of annular elements. The arc elements of the suction pipe hit the oversized soil, which jump out of whose grille and fall to the bottom of the bottom. 2 Il.

Description

The invention relates to the construction and is intended for the development of soil by a dredger in an underwater mine.

The purpose of the invention is to increase the productivity of the dredge in the development of soils with oversized inclusions by reducing the time spent on cleaning the soil collecting device from stuck in it oversized inclusions.

1 shows a soil collecting device, side view, in section; figure 2 - the same, end view.

A soil intake device consists of a suction pipe 1 with stops 2 on its surface and a guide rib between the stops arranged parallel to the axis of the pipe (the edge is not shown in Fig. 1.2). The lower end of the suction pipe 1 is provided with arc elements 3 installed in the longitudinal planes. Between the stops 2 on the suction pipe 1, the tip 4 is concentrically located outside

with the possibility of movement along the suction pipe 1 limited by stops 2,

The tip 4 is provided with an annular stop 5 with a groove which is fitted on the guide rib of the suction pipe (the groove in Fig. 1.2 is not shown). The lower end of the tip is provided with a volumetric grid made up of transverse planes — annular elements 7 — arranged in the longitudinal planes of the arc elements biv. The dimensions of whose grid of elements 6.7 do not exceed the size of the flow section of the soil pump. The placement planes of the arc elements 3 of the suction pipe are located between the planes of the adjacent arc elements 6 of the tip and parallel to each other.

Ground dredger device is used as follows.

When the soil pump is running, feed tip 4 to the bottom ground. The tip hangs ring stop 5 on the bottom

2

SL 00

with about

stop 2 of the suction pipe 1 (fmg.1). The water that is sucked into the tip 4 from the water area of the bottom is washed away and carried to the tip. From the tip cavity, the slurry stream enters the suction pipe 1 and then flows into the ground pump.

When developing the soil, the soil particles with dimensions not exceeding the size of the flow section of the soil pump penetrate through the grids into the grids of 6.7 tips into its cavity. From the cavity of the tip of the flow of the slurry passes between the arc elements 3 of the suction pipe 1 into its cavity.

Oversized inclusions are flushed out of the ground mass with a stream of water and rise to the 6.7 end of the grid, hit the grid, bounce off it and fall back to the bottom of the ground. Some of the oversized, due to the peculiarities of their form, pass through the elongated protrusions into the grid cells and get stuck in them. Through these chei the slurry stream ceases to flow into the cavity of the tip. The total area of the lumen in the grid is reduced. This leads to a change in pressure in the suction zone.

The total pressure of the flow on the grid 6.7 tip increases. It reaches such a size that the tip 4 begins to slide along the suction pipe 1 from the lower stop 2 to the upper stop 2. The arc elements 3 of the suction pipe 1 hit the ground oversize, stuck in the grating 6.7 of the tip 4, the oversize jump out from whose lattice and fall to the bottom of the slab. The flow pressure on the tip grid decreases, the tip slides down, takes

initial position (fig. 1). Continue to develop the ground.

When the flow forces are not sufficient to move the tip 4 along the suction pipe, for pushing the jams in its oversized grating cells, it is necessary to provide for the tip to be forced to move from an individual drive, for example a hydraulic cylinder, placed

on the suction pipe 1, with the rod attached to the tip 4.

Claims (1)

Invention Formula A dredging device, including a suction pipe with a tip that is located on the outside and installed with the possibility of limited movement along the suction pipe between the stops made on it, characterized in that, in order to increase the productivity of the dredge in the development of soils with oversized inclusions by reducing the time spent on cleaning the soil intake device from oversized inclusions stuck in it, the lower end of the suction pipe is equipped with in longitudinal arc planes elements, and the lower end of the suction tip is a volume grating made of annular elements arranged in the longitudinal planes, the dimensions of whose gratings do not exceed the size of the flow section of the ground pump, and the planes of placement of the arc elements of the suction pipe are between the planes of adjacent arc elements of the tip and parallel between by myself. Fig-1