SU1328442A1 - Working member of suction dredger - Google Patents

Abstract

The invention relates to the field of hydromechanization and can be used for dredging and laying trenches at the bottom of reservoirs. The purpose of the invention is to increase the efficiency of soil digging by preventing soil subsidence at the side walls (BS) 3 of the tip (H) 2. The working body includes a suction pipe 1 with a conical 1 H 2 with a protective grid and a separator 6 of the slurry stream. It has a 6 horizontal sectional profile of a coil feather with a truncated tail 7 mounted at the entrance to H 2 and coaxially with it and facing the expanding part towards the bottom. When the dredge frame is lowered to the bottom and the pump is turned on, the soil is eroded and sucked into H 2 and pipe 1 Water, raid on divider 6, goes around iero, and the slur is displaced from the H 2 axis towards BS 3. The flow rate pulp at BS 3 will be higher than without separator 6. Pulp is additionally ejected by e-Gs. In addition, the tail 7 provides a vacuum zone into which the streams flow. This entails heightening of the soil, which is prone to subsidence at BS 3, 1 sludge. S (l

Description

one

The invention relates to hydromechanization and is intended for earthworks using the erosion method of dredging and dredging at the bottom of reservoirs.

The aim of the invention is to increase the efficiency of the soil excavator by preventing the soil from settling at the side walls of the tip.

The drawing shows the working body of the suction dredge, section, top view.

The working body of the suction dredge consists of the suction pipe 1, to which the tip 2 is of an alike shape. The nozzle pharynx is formed by side walls 3, which fan-shapedly diverge from the suction pipe 1 to the pharynx, the upper and lower steppeas 4, also made fan-shaped. In addition, the shed of the arrestor 2 is provided with vertical and horizontal protective ribs 5. Splitter 6 is made, for example, with a bobbin and a theoretical profile of a coil pen, for example, a HED, with a truncated tail 7, mounted on the end of the tip and rigidly connected to the top and bottom The walls 4, the chord 8 of the separator 6 are aligned with the axis of the tip 2, the spacing part - the nose 9 of the separator 6 is facing the bottom.

The working body of the suction pump works as follows.

The working bodies with slit-shaped tips and the erosive method of soil loosening are designed to work most effectively on light soils, i.e. with average croup. Particle size up to i mm and in inadequate condition. At the same time, the effectiveness of the dredger is low due to the fact that the slit-like and elliptical laconic terminal has the effect of reducing the rate of suction of the pulp, as well as the flow rate per unit area of the mouth, from the middle (axis) tip 2 to its edges (side walls 3). This leads to the appearance of sediment in tip 2 at the side walls 3. In addition, the consumption of soil, the arrival — 1 mm per unit area of the pharynx, increases with distance from the middle (axis) to the edges (side walls 3) due to lateral trench slopes. As a result, the concentration of the mixture (pulp) increases, which also

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Even for an increase in the layer of sediment at the side walls 3, which can block part of the throat.

A slit-shaped tip 2 with a section of body 6, of the working organ, when lowering the frame of the suction-jet projectile (not shown) with the suction pipe 1 attached to the frame, reaches the bottom in the water area. At the same time, the dredger (ground pump) installed on the floating craft (not shown), Origin, is put into operation. direct suction of soil

15 that, as water flow rates form near the throat of the tip, which erosively erodes and entrains the soil into the throat of tip 2 and further into the suction pipe 1.

20 taps of water, and geyas maximum values on the axis of the tip 2 at the throat, raid on the nose 9 of the separator 6, made with. the profile of the pen rolls type NEZH, which has the smallest. 25 resistance to flow around at the highest speeds, bends around it, and the pulp, while maintaining the continuity of the jet, is displaced from the axis of the tip towards the lateral wall 3 of the tip 2.

30 At the same time, in the mouth of the tip 2, co. . the latter of the two semi-diffuse cavities, the pulp flows enter, the velocities of which at the side walls 3 are higher than if the tip 2 is without

35 divider 6. In addition, streams

pulp streamlined separator 6, deviate curvilinear from the axis of the tip 2. An additional ejection of the pulp occurs, which leads to

40 picking up the soil prone to settling at the side walls 3. This phenomenon is enhanced by the fact that the XBOCV 7 of the separator 6 provides a vacuum zone in which

45 streams flowing around separator 6 and carrying streams of soil along the side walls 3 follow. And since the vacuum zone is a gathering point of the soil (the impact of stones in the river) and is located in the zone of the tip axis; suction is maximized, all soil entering the nostril of the tip is transported without sedimentation

55 over the soil pipe.

Claims (1)

Invention Formula The working body of the suction sump, including a suction tube with a conical slit-like tip. 31328442 having a protective grate, about slurry of slurry, having a roll profile with a ground-erected tail mounted on by preventing sediment from entering the tip and coaxially with it and that at the side walls of the tip, facing the expanding part in the latter is equipped with a po-side separator. Compiler R. Adiatulina Editor. And. Shulla Tehred I. Veres Proofreader V. Girn to Order 3459/32 Circulation 606 Subscription VNIIPI USSR State Committee Inventions and Cases .113035, Moscow, Zh-35, Raushsk nab., 4/5 . Production and printing company, Uzhgorod, st. Design, 4.