Dredger actuated from land

Abstract

A dredging system for the removal and cleaning of sediment in bays, port entrances, navigable channels, docks, watercourses, lakes or reservoirs, which is provided with means for excavating, dragging and removing the bottom of the waterway and means for regulation and support, the driving force for which is provided from land, which facilitates extraction of sediments directly onto the land, immediately leaving a planar surface on the sea bed. The aforesaid is achieved by controlling the excavator means and very closely controlling the cutting depth, all in a shorter period of time and at lower cost.

Claims

1. A dredging system configured for an extraction and cleaning of sediments comprising: a frame, wherein the frame comprises at least two longitudinal beams and a central beam; a drag blade; at least two chains; a hydraulic mechanism, wherein the hydraulic mechanism is located on the drag blade and allows for vertical movement of the drag blade; at least two watertight skids connected to the frame, wherein the watertight skids allow floatation of the dredging system; a lower blade located on a lower perimeter edge of the drag blade; a suction mouth located on the central beam; a suction pump located on the central beam and connected to the suction mouth via a hose; a extraction hose, wherein the extraction hose carries the extracted sediments; wherein the driving force of the dredging system is exerted from a land surface and not from a vessel on a water surface; wherein the suction mouth is installed on the central beam above the drag blade and is a flattened tube with a thin opening, elongated across a front and length of the drag blade such that the suction mouth is connected by the hose via the suction pump installed on the central beam; and wherein the suction pump sucks mud and sludge from a bottom through the thin opening and the mud and sludge is driven through the extraction hose.

2. The dredging system of claim 1, wherein the watertight skids further comprise: an air inlet valve; and a water outlet valve; wherein the skids are configured to be flooded to provide buoyancy and reduce the depth of the cut by relieving the weight of the dredging system.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) To understand more easily the conformation and technical characteristics of the dredger of the invention, we will describe it in part to the drawings that are an integral part, without this meaning to limit it or obvious modifications that could arise, where:

(2) FIG. 1 shows an isometric view of the dredger of the invention.

(3) FIG. 2 shows a view in lateral elevation of the dredger of the invention.

(4) FIG. 3 shows a front elevation view of the dredger of the invention.

(5) FIG. 4 shows a top plan view of the dredger of the invention.

DETAILED DESCRIPTION OF THE SEVERAL EMBODIMENTS

(6) In attention to FIGS. 1 to 4, the invention is a dredge with systems of flotation and capture of sediment or similar, is equipped with a drag blade (1) with vertical movement through the use of a hydraulic or mechanical mechanism (6) to regulate the cut (drag angle of attack), it has been created for the sweeping or dragging and extraction of material under water or dredging. Said blade (1) is driven (or dragged) by two winches anchored by chains (not illustrated) at a suitable distance to the surface to be dredged; they are connected to a chain in crow's feet (8) that takes the dredge from long-girder beams (2) corresponding to the frame of the dredger, which has two or four systems or means of wide, watertight and hydrodynamic skids (4), to be dragged with an angle of attack of a lower blade (9) located on the lower perimeter edge of the dredger. As the sediment material to be extracted may be soft, the broad surface of said skids (4) covers a large contact area so that it does not sink into it. These skids (4) being watertight can be flooded inside to make them heavier, or emptied to give buoyancy to the dredger, which helps to lighten the weight of the entire structure or frame of the dredge. The frame has the particularity that its framework is removable for its transport that is why part of its beams (2) and (12) are bolted. On the structure it carries a graduated ruler used to control the progress of dredging. The main winch (not illustrated) becomes firm at an anchor point on the beach. Another winch (not shown) is on the boat offshore, which is anchored and is responsible for returning the blade (1) to the point where it begins to remove the material, this winch does not need much power but more speed to position the dredger at its starting point. This is because the drag is made from the smaller boat with the dredge floating freely on its lateral air-tight skids.

(7) The skids (4), are two or four hollow rounded structures of hydrodynamic shape, located on the sides of the longitudinal beams (2), said skids (4) during the task prevent the blade (1) from sinking into the substrate when it is pulled, since they are watertight and of a certain volume, they have the capacity to be flooded or to be kept full of air, which allows to regulate the weight of the dredge machine. This is achieved by the entry of compressed air through one valve (3), which by the injection of pressurized air extracts the water that leaves through a second valve (5), then these valves are closed once the depth of cut is adjusted.

(8) To mitigate the environmental impact, the dredge has installed on the central beam (12) and above the blade (1) a tubular piece of elongated metal (10), which is a flattened tube, with a thin opening elongated across the front and the length of the blade. This piece of metal is connected by a hose to a suction pump (7) installed on the same beam (12). The pump sucks through this long opening on the blade, the mud that the work lifts from the bottom. This water with mud is conducted to the ground by means of a hose (11), to a decanter or separator of solids (not shown).

DIAGRAM AND PARTS OF THE DREDGER

(9) 1: drag blade. 2: vertical beam. 3: air inlet valve 4: skids. 5: water outlet valve 6: arch blade adjustment bracket 7. Motor pump 8: chain in crow's tooth. 9: blade. 10. Suction mouth 11. Sludge extraction hose 12. Central beam