SU1441029A1 - Earth-intake device for suction dredger - Google Patents

Abstract

This invention relates to hydromechanization and is intended for underwater excavation. The purpose of the invention is to increase the reliability of the device by reducing piston wear. The intake device for the suction dredge contains a suction pipe (T) 1 with an annular ejector (CE) 2, communicated by a connecting pipe.

Description

 four

(L

four

four

N)

T 3 with a working chamber 4. In the latter there is a piston 5 with a rod 6 connected to the vibrating line 7. An additional CE 8 is installed on the suction T 1. The CE 8 is placed behind the main CE 2 and communicated with the connecting T 3 by a port 9. The latter is installed backward valve (OK) Yu with the possibility of the passage of fluid from the EC 8 into the pipe 9. The other OK 11 is installed on the section T 3 between the EC 8 and the junction of the socket with T 3 with the possibility of passing the liquid from T 3 into the main EC 2. During

piston 5 upwards OK 11 closes and OK 10 opens. The slurry is sucked into the T 3 and the nozzle 9, and the passage through the CE 8 is clarified. During the return stroke of the piston 5, the slurry is introduced into T 1. By the time of the beginning of the next cycle, the section from CE 2 to CE 8 with length L is filled with clarified slurry with a concentrated core formed. Then the cycle is repeated. This ensures a reduction in the number of solid particles penetrating through T 3 and the pipe 9 to the working chamber 4 and wearing the piston 5. 1 Il.

one

This invention relates to hydromechanization and is intended for underwater excavation.

The aim of the invention is to increase the reliability of the device by reducing piston wear.

The drawing shows the proposed soil-collecting device, side view.

The suction dredger assembly device contains a suction pipe 1 with an annular ejector 2 at the inlet communicated by connecting pipe 3 with a working chamber 4. In the chamber 4 there is a piston 5 with a rod 6 connected to the vibration actuator 7. An additional annular ejector 8 is installed on the suction pipe 1 sequentially located behind the annular ejector 2 and communicated with the connecting pipe 3 through the pipe 9. On the pipe 9 is installed a check valve 10 with the possibility of passage of fluid from the eject pa 8 in conduit 9. The second check valve 11 is mounted on the portion of the connecting conduit 3 between the ejector 2 and the junction pipe 9 to the connecting pipe 3 skippable fluid from the conduit 3 connecting the ejector 2 g.

Primer device operates as follows.

The vibrodrive 7 causes the piston 5 to reciprocate along the axis of the working chamber 4. When the piston 5 moves upward, the valve 11 closes and the valve 10 opens. The slurry is sucked into the connecting pipe 3 and the pipe 9 and the passage through the ejector 8 is clarified. This process causes an increase in the velocity of the slurry at the entrance to the pipeline 1, which contributes to the intensification of the process of separating the soil particles from the array and their involvement in the pipeline I. The consistency of the slurry entering into the pipeline 1 increases.

Distance traveled concentrated

half cycle, determined by formula

/ 1 J

2 / Q, .- Q;

where Vn is the pulp velocity, m / s;

/ - oscillation frequency, 1 / s; Qbc is the flow rate of the slurry at the inlet of the suction pipe,

Q; T - slurry consumption in the connecting pipeline,.

An additional ejector 8 is installed at a distance L from the ejector 2.

15 During the return stroke of the piston 5, the valve 10 closes and the valve 11 opens. The clarified slurry from line 3 is introduced through the ejector 2 into line 1. The resistance at the inlet to line 1 increases, and a mixture of lower concentration is drawn into it. At the same time, it is diluted with a clarified mixture from pipeline 3, and an annular ejector 2 forms a flow structure with a concentrated core and a clarified peripheral layer. By the time of the end of the cycle, the clarified mixture approaches the ejector 8. Thus, by the time of the beginning of the next cycle, the section from the ejector 2 to the ejector 8 of length L is filled with a clarified slurry with a formed concentrated core. Then the cycle is repeated. All this provides a reduction in the number of solid particles penetrating through the pipe 3 and the pipe 9 to the working chamber 4 and wearing piston 5.

35

Claims (1)

Invention Formula A suction dredger assembly, including a suction pipe with a ring ejector at the inlet communicated by connecting pipe with a working chamber containing a piston located therein with a brush connected to the vibration drive, characterized in that, in order to increase the reliability of the device by reducing piston wear, it is equipped with an additional ring ejector sequentially located behind the main ring ejector on the suction pipe and communicated with the connecting pipe by pipe and two non-return valves, one of which is installed on the pipe with the possibility of passing the liquid from the additional ring ejector to the pipe and the other is installed in the section of the connecting pipe between the main ring ejector and the connection of the pipe with the connecting pipe main ring ejector.