CN201437598U

CN201437598U - Special equipment for rake head high-pressure flushing of self-trailing suction hopper dredger

Info

Publication number: CN201437598U
Application number: CN 200920075859
Authority: CN
Inventors: 张景明; 江帅; 树伟; 周海; 徐元
Original assignee: Shanghai Waterway Engineering Design and Consulting Co Ltd
Current assignee: Shanghai Waterway Engineering Design and Consulting Co Ltd
Priority date: 2009-08-05
Filing date: 2009-08-05
Publication date: 2010-04-14
Anticipated expiration: 2019-08-05

Abstract

The utility model relates to special equipment for the rake head high-pressure flushing of a self-trailing suction hopper dredger, and aims to solve the technical problem of providing special equipment for the rake head high-pressure flushing of the suction hopper dredger, which directly inserts injection tubes below the mud surface for flushing and breaking the soil at high pressure; the technical scheme of the utility model comprises a high-pressure flushing water pump, a water tank, a rake head, injection tubes, spray nozzles or spray seams, and is characterized in that a plurality of injection tubes are fixed on a bottom plate in front of a suction chamber of the rake head or in the middle of the suction chamber; and the injection tubes are provided with a plurality of spray nozzles or spray seams. The utility model is a special device for the dredging of the seashore, the riverbank, inland rivers and lakes.

Description

Trailing suction hopper dredger drag head high-pressure flush special-purpose machines and tools

Technical field:

That the utility model relates to is coastal, riverine, inland river, lake are used dredging tool, especially trailing suction hopper dredger excavate facility.

Background technology:

When having the trailing suction hopper dredger mining clay now, for reducing the drag head resistance, generally be equipped with high-pressure flush and break ground, depending nozzle ejection high-velocity flow is broken diffusing with closely knit earth, forms looser soil property, excavates output with the raising drag head.

The high-pressure flush nozzle is laid in drag head at a certain distance and inhales on the base plate in the place ahead, chamber, carries out vertical high-pressure flush and sprays, and the mud that splashes enters drag head suction chamber and is inhaled in the dredge pump.

In recent years, study success and what be used more widely is that perforate direct injection current break ground or are used in combination with vertical high-pressure flush on rake teeth in the world.

The structure of these two kinds of jet water courses generally have only 2 centimeters, and the width of drag head has several meters wide because the diameter of nozzle is less, though the quantity that nozzle is installed can increase, but become spot distribution during water spray, ejection current scour diffusingsurface is less, and the mud face of excavation forms ditch, poor shape.Also since the high-pressure flush jet expansion generally all more than the mud face, high-velocity flow enters the water body interface that will pass through certain depth before the mud layer, the flow energy decay is very fast, influences the high-pressure flush effect of breaking ground.

The utility model content:

The utility model technical issues that need to address provide a kind of playpipe directly is inserted into and carry out the trailing suction hopper dredger drag head high-pressure flush special-purpose machines and tools that high-pressure flush is broken ground below the mud face.

The technical solution of the utility model is made up of high-pressure flush water pump, water tank, drag head, playpipe, nozzle or spray seam, it is characterized in that being fixed on the base plate of drag head suction the place ahead, chamber or in the middle of the suction chamber with many playpipes, and playpipe is provided with a plurality of nozzles or spray seam.

The utility model has the advantages that playpipe to be inserted and carry out high-pressure flush below the mud face and break ground, reduce the above high-pressure flush of mud face and pass through the water body interface and do the pressure energy loss that is caused; Playpipe horizontal direction high-pressure flush can strengthen the maximum erosion quantity on the native cross section of drag head excavation, excavates construction less expensive, reasonable; Playpipe sprays high-velocity flow and washes away earth, and alternative existing rake teeth is cut the earth, and wear resistance is better than rake teeth; Adopt playpipe to spray high-velocity flow and wash away earth, the soil property that is suitable for is wider, and use high-pressure flush that clay soil, the loose sand effect of breaking ground is subjected to certain placing restrictions at present, the utility model adopts the following horizontal high-pressure flush of mud face to break ground, the present above high-pressure flush of mud face of dredging efficiency is broken ground and is compared, and can improve 10%--30%.

Description of drawings:

Fig. 1 is the utility model trailing suction hopper dredger drag head high-pressure flush special-purpose machines and tools schematic diagrames.

Fig. 2 is a trailing suction hopper dredger drag head high-pressure flush special-purpose machines and tools construction operation flow chart.

The tool present embodiment:

The utility model (accompanying drawing 1) is by high-pressure flush water pump 1, water tank 2, drag head 3, high-pressure flush playpipe 4, high-pressure flush nozzle or spray seam 5 are formed, and settle some playpipes in the middle of drag head is inhaled on the base plate of the place ahead, chamber or inhaled the chamber, need settle the injection pipe support when settling playpipe in the middle of inhaling the chamber, playpipe is provided with a plurality of nozzles or spray seam, and size, the number of the height of playpipe, nozzle or spray seam are adjusted according to flow, pressure, the closely knit situation of excavation soil property of high-pressure flush.The utility model (accompanying drawing 2) injects water under high pressure by the high-pressure flush water pump in water tank, be communicated to then on the playpipe of drag head floor below, nozzle on the playpipe or spray seam ejection high pressure, high-velocity flow wash away the following earth of the water surface, vertically and the high-velocity flow of end nozzle or the ejection of spray seam can reduce playpipe and advance or inserts frictional resistance in the soil, laterally the high-velocity flow of nozzle or the ejection of spray seam can wash away native lateral cross section to greatest extent.Drag head shoveling output is controlled by vertical drag head gait of march and transversal flow cross section mainly, and under the gait of march certain condition, utilizing high-pressure flush to make the maximization of transversal flow cross section is the key that improves output.

Claims

1. trailing suction hopper dredger drag head high-pressure flush special-purpose machines and tools, form by high-pressure flush water pump, water tank, drag head, playpipe, nozzle or spray seam, it is characterized in that being fixed on the base plate of drag head suction the place ahead, chamber or in the middle of the suction chamber, a plurality of nozzles or spray seam are arranged on the playpipe with many playpipes.