SU1313968A1 - Suction dredger - Google Patents

Abstract

The invention relates to hydromechanization, is intended for underwater soil development and improves the reliability of operation when the soil is covered with suction pipelines. For this end of the outlet (KP) 14 of the discharge pipe 13 is installed at an acute angle to the plane of the suction inlet of the tip 5. The gearbox 14 is located under the suction tip 5 and has in the upper part a section 25 in the form of a segment with a chord length not exceeding its diameter. The length of the slice is 1-2 KP 14 diameters, and the beginning of the slice is aligned with the rear edge of the tip 5. When the dredge is working in the receiving chamber 3, the flows from the nozzle 2 and tip 5 are displaced, and in the chamber 6 they are separated. A stream with a part of the soil fine fractions is sucked off and directed through the pressure pipeline 13 from KP 14 to the subsea bottomhole to loosen the soil in the zone of the ground intake. The second stream through the outlet 7 enters the pipe 21 with a floating reflower 23 for washing the soil in the dump zone. In the case of a blockage of the suction pipe with a tip 5, the stream emanating from the gearbox 14 ensures erosion of the soil. 1 Il i SL 23 00 co; o Ci oo 25 1

Description

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

The purpose of the invention is to increase the reliability of operation in case of blockages with the ground of the suction pipe.

The drawing shows a suction dredge, a longitudinal section.

The dredging projectile contains a ground-breaking device, placed on the frame, from the main ejector with a working stool 2, a receiving chamber 3 with a receiving pipe 4, connected by a suction pipe with a tip 5, separation chamber 6, made in the form of a diffuser, junction into cylinder,. with the outlet nozzle 7, the perforated nozzle 8 and the nozzle 9 connected by a pipeline with the receiving nozzle 10 of the receiving chamber 11 of the additional ejector with a working nozzle 12, a pressure head

the pump. The remaining part of its flow in the amount of 25-50% goes to the working nozzle

12 additional ejector. The second stream is taken from the underwater ground

 the suction pipe with nozzle 5 as a result of the first flow at the exit of the working nozzle 2 of the main ejector.

In operation, the dredger and both flows are mixed in the receiving chamber 3, and

10 are then separated in chamber 6. One stream with a part of small fractions of soil is sucked out of chamber 6 by an additional ejector with a capacity of not less than the flow rate of the main ejector working stream and is directed through a pressure pipeline

13 with an end pipe 14 on the subsea bottomhole for its loosening in the zone of the grouser. In the process of loosening the soil, the fine fractions entering the soil intake zone with the loosening pipeline 13 with the end pipe 14, 20 of the lean pulp are connected to the submerged bottom of the soil. The suctioned pulp is transported with

The inlet 15 of the receiving chamber in the separation chamber 6, where they

The additional ejector is connected by a separate pipeline through the control valve 16 to the working pipeline 17, through which the working water flow from the water pump 18 with the suction pipe 19 with the water inlet tip 20 enters the working nozzle 2 of the main ejector.

The perforated pipe 8 of the separation chamber 6 with an inlet end is connected to the outlet of the receiving chamber 3 of the main ejector, and the outlet end is connected to the output pipe 7 to which the conveying pipe 21 is attached with the sagging rubber sleeve 22 and the floating reflux 23 mounted on it.

The lifting and lowering of the end part of the frame 1 is performed by the winch 24.

The end pipe 14 is installed at an acute angle (40-80 °) to the plane of the suction inlet of the tip 5, is located under it and has in the upper part a slice 25 in the form of a segment with a chord length not exceeding its diameter, and the cut length is 1-2 diameters of the end pipe, and the beginning of the cut is combined with the rear edge of the tip 5.

Suction dredge works as follows.

When working suction dred yes

25

thirty

35

using cable

are separated from it with a stream sucked by an additional ejector, and return with it to the underwater bottom to further loosen its soil.

The second stream, coming from the underwater slab in the form of pulp sucked through the tip 5, after separating from it in the separation chamber 6 the small fractions of soil returning to the underwater slaughter, is directed through the outlet 7 to the pipe 21 with a floating reflower 23 for washing the soil in the zone allowed dump

When blockages with the soil of the suction pipe, the flow from the end pipe 14 through the cutout 25 blurs the soil and cleans the suction hole.

Claims (1)

Invention Formula A suction dredge comprising a suction pipe with a nozzle connected to the inlet of the separation chamber, the outlet of which is connected to the pressure pipe with an end pipe, and a transport pipe connected to a perforated pipe installed in the separation chamber, characterized in that increase the reliability of operation when the ground is filled up with the suction pipe, the end pipe of the pressure pipe is set at an acute angle to 45 The receiving chamber 3 of the main ejector, in the plane of the suction inlet, connects two streams. The first flow of the post-- - - falls from the reservoir into the working nozzle 2 as a result of the work of the water pump 18 in the amount of 50-75% of the total developed flow The nickname is located under it and has a slice in the form of a segment with a chord length not more than its diameter, and the slice length is equal to 1-2 diameters of the end nozzle. Compiled by N. Klochkov Editor V. KovtunTehred I. VeresKorrektor A. Tsko Order 2003/31 Circulation 607 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4 the pump. The remaining part of its flow in the amount of 25-50% goes to the working nozzle 12 additional ejector. The second stream is taken from the underwater ground the suction pipe with nozzle 5 as a result of the first flow at the exit of the working nozzle 2 of the main ejector. In operation, the dredger and both flows are mixed in the receiving chamber 3, and then they are separated in chamber 6. One stream with a part of small fractions of soil is sucked out of chamber 6 by an additional ejector with a capacity not less than the flow rate of the main ejector's working flow and is directed to them along the pressure pipeline 13 with an end pipe 14 on the subsea bottomhole for its loosening in the zone of the grouser. In the process of loosening the soil, small fractions entering the soil intake zone with loosening flow 5 0 five are separated from it with a stream sucked by an additional ejector, and return with it to the underwater bottom to further loosen its soil. The second stream, coming from the underwater slab in the form of pulp sucked through the tip 5, after separating from it in the separation chamber 6 the small fractions of soil returning to the underwater slaughter, is directed through the outlet 7 to the pipe 21 with a floating reflower 23 for washing the soil in the zone allowed dump When blockages with the soil of the suction pipe, the flow from the end pipe 14 through the cutout 25 blurs the soil and cleans the suction hole. Invention Formula A suction projectile, including a suction pipe with a tip, connected to the inlet of the separation chamber, the outlet of which is connected to the pressure pipeline with an end port, and a transport pipeline connected to a perforated pipe installed in the separation chamber, characterized in reliability of operation when soil is blocked by the suction pipeline, the discharge pipe end pipe is installed at an acute angle to the plane of the suction port