SU1208145A1 - Soil intake arrangement for suction dredger - Google Patents

Description

FIELD OF THE INVENTION The invention relates to hydraulic engineering, dredging, the development of underwater mineral deposits and the extraction of building materials.

The purpose of the invention is to increase the efficiency of the suction dredger in various operating conditions.

FIG. 1 shows the proposed soil-collecting device, front view; Fig 2 is the same, top view; in fig. 3 shows section A-A in FIG. 2 (soil collecting device in the working position).

The grouting device contains a ground receiver 1 with two suction sections 2 and 3 and a protective grid 4, a collector 5 of a hydraulic soil ripper with nozzles 6 and a pipeline 7 for supplying water to the hydrofluorization.

The device works as follows.

Before starting the operation, the hydrofluidizer pump (not shown) is turned on and the loosening water is fed through conduit 7 to the collector 5. Then the soil receiver 1 is lowered to the desired development depth and the ground pump (not shown) is turned on.

In operation, the suction dredger moves along the trench forward, while the soil receiver 1 approaches the soil mass. The loosening water, flowing out at high speed from the nozzles 6 located between the suction sections 2 and 3, penetrates into the ground and begins to weigh it and push the ground receiver 1, which sucks the resulting slurry. Moreover, the removal of suspended soil occurs both above the main jet of loosening water and below it. Therefore, the slurry is sucked both by the upper 2 and lower 3 by the suction sections of the earth trailer.

During the operation of the suction dredge, the depth of excavation can vary considerably. The proposed design of the soil-intake device allows the effective development of the soil regardless of the depth of work.

When working at shallow depths, the lower section 3 of the soil collector 1 works more efficiently. In this case, the jets of loosening water go almost horizontally and work not only to weigh the soil, but also to wash out. Suspended soil, which is carried below the main jet of loosening water, is fully absorbed by the lower section 3 of the soil receiver 1.

section 2. The concentration of the slurry entering the lower section 3 is significantly higher than in the upper section 2.

When working at great depths

more intensively sucks suspended soil of the upper section 2. Water jets act on the soil at a large angle to the horizon and their effect on the slope of the soil is reduced. The removal of the soil is carried out by the main stream of loosening water. The concentration of slurry entering the upper suction section 2 is low. Bottom section 3 sucks sparse soil.

In addition, the performance of the dredge to a significant extent is influenced by the perimeter of the groundwater receiver shed. The proposed device allows to increase the perimeter of the soil intake, while maintaining its total area.

The distance between the suction sections 2 and 3 should not be less than the height of the individual section of the soil receiver in order to ensure the most effective interaction between the jet of loosening water and the flow of the slurry entering the soil receiver.

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FIG. 2

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Compiled by P. Adiatulina Editor m. Petrova Tehred T. Dubinchak Proofreader L Pilipenko

Order 194/37 Circulation 642 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/4

Branch PPP Patent, Uzhgorod, st. Project, 4

Claims (1)

(47) Soil intake device of a dredging projectile, including a suction nozzle and a collector with nozzles, characterized in that, in order to increase the efficiency of the dredging projectile, the suction tip is divided by a collector and nozzles in height into two separate suction sections, the distance between which is not less than the height of a separate sections.