EP0516009B1 - Jet connected to a device to increase the water depth of a watercourse - Google Patents

Description

The invention relates to a flushing pipe according to the preamble of claim 1.

Various methods are conventionally used to increase the water depth of a body of water. In particular, waters are dredged for this. Such dredging can often not be carried out evenly, so that unevenness occurs in the dredged bottom of the water, the bottom of the water is therefore lower in some places and higher in some places. In order to level such a reason, this reason can be raked, for example by pulling a rake across the bottom of the water with a ship. Such a raking process is very labor intensive and energy intensive. Such a process is often not feasible in narrower waters, since the ship pulling the rake, for example a tug, is severely restricted in its maneuverability during this process. In addition, it can happen that the rake gets caught on the ground, on stones or other obstacles and is difficult to loosen, and may also be damaged.

To deepen a body of water, excavation can also take place initially, which can result in an uneven ground, and then the material of the ground can be whirled up so that it settles again at least more evenly, so that the unevenness caused by excavation is compensated for. A flushing device for whirling up the base material is known from DE-C-184369. Depending on the current, the material swirled up in the bottom can sometimes cover large distances from the water in the water be transported away, so that the water depth can also advantageously be increased further by the whirling process. A sufficient flow to remove the whirled up material can also be generated artificially with a flushing device.

The base material can be dredged, for example, with a suction nozzle, as is originally known from EP-A-0075358. The proboscis is preferably pulled over the bottom of the body of water, with suction channels that look like furrows appear in the bottom of the body of water. These channels are leveled by the subsequent whirling process or the bottom is preferably lowered even further.

As already mentioned, a flow can be used to remove the whirled up base material, which flow can be artificial or natural. In particular, the flow artificially generated with a flushing device can be directed to a certain base area in a targeted and as concentrated manner as possible, so that the flow in this particular base area can propel the whirled up base material with a particularly great force. For example, US-A-4819347 shows a rinsing tube of a rinsing device which, according to the type mentioned at the outset, is equipped with a water guide surface for this purpose.

The flushable flushing pipe of said publication is preferably arranged as a section of the flushing line in the working position approximately dwars to the ship, that is to say transversely to the longitudinal axis of the ship, approximately parallel to the base plane. This flushing pipe, therefore, covering a certain working width, can be pulled from the ground by a ship, as would also be the case conventionally with a rake, but the flushing pipe advantageously does not have to lie on the bottom, and therefore does not easily get caught on obstacles can like such a rake. So it can also be a Be leveled on which boulders or the like lie. With the nozzle jets of the flushing device, the space between these boulders is detected and leveled, whereby the flushing line section can still be located above the boulders. The flushing pipe has (regularly) spaced from one another approximately radially directed (obliquely) bottom-directed nozzles with which flushing medium jets are generated.

The invention has for its object to improve a flushing pipe of the type mentioned, with which the water depth of a body of water can be increased and a level bottom of the body of water is left so that the naturally existing and / or artificially created with the flushing medium Flow with the water guide surface is directed to a certain basic area in an even more concentrated and targeted manner.

This object is achieved by the features of claim 1.

According to the invention, the water guide surface has an angle of attack in the angular range between radial and tangential, preferably of approximately 45 ° obliquely to the radial direction, such that a wedge shape is formed between the guide surface and the base. If the flushing pipe according to the invention is drivable, for example with a ship, the higher edge of the water guiding surface points in the direction of travel of the ship, since at least the flow can be expected from this direction due to the speed of the ship. This driving flow is thereby advantageously used by the water guiding surface for further lowering the bottom. The effect of whirling up the bottom achieved by the nozzles of the flushing line is multiplied by means of the water guiding surface according to the invention; in particular, the whirling up of the bottom itself is thus increased by means of the directed flow. Appropriate reinforcement should be achieved using the flushing medium via the nozzles several times more energy would be required.

Overall, the efficiency of the flushing device is significantly increased by the water guide surface according to the invention. The lower edge of the inclined guiding surface facing away from the flow is preferably guided just above the bottom, so that the water flowing into the wedge shape between the bottom and the guiding surface must flow through a narrow gap between the bottom edge of the guiding surface and the bottom, whereby the base material is so strong entrains that the bottom behind the guide surface is hollowed down, that is, a step is created behind the area of the guide surface because the bottom in the area behind the guide surface is lowered by the flowing water.

The water guiding surface is preferably attached to one of its longitudinal edges (directly) on the outer circumference of the flushing pipe. For example, the guide surface can be essentially a sheet metal that is welded to the pipe.

The guide surface is preferably arranged a quarter circumference of the flushing pipe away from the nozzle or nozzles, preferably a little less away. In the working position of the flushing pipe, the nozzles point essentially downwards in the direction of the bottom, preferably at a slight angle, while the guide surface is arranged on the front of the flushing pipe, the front being the side facing the expected flow or the Direction of travel of the ship pulling the flushing device. The guide surface extends essentially along the flushing pipe.

A further development of the invention provides that the guide surface has a kink edge running parallel to the flushing pipe, along which the guide surface is bent away in the direction away from the flushing pipe. The guide surface is preferably designed so that the fixed portion of the guide surface is so long is formed that the free, kinked portion of the guide surface is approximately congruent with the tangent running parallel to the said radial. So while in the working position of the flushing pipe the fixed section of the guide surface attached to the flushing pipe is directed obliquely to the bottom, the free, kinked section runs approximately parallel to the bottom, so that overall the flowing water can flow into a type of funnel formed by the guide surface and into Direction to the bottom for rinsing the bottom is directed. A further development of the invention provides that console-like stiffening ribs are provided perpendicular to the guide surface and dividing the area under the guide surface into compartments. These ribs not only stiffen the guide surface, but also form compartments that could be viewed as flow channels for the water.

The guide surface is preferably designed as a guide plate.

Fig. 1

eine Seitenansicht eines Baggerschiffes,

Fig. 2

eine Draufsicht auf das Baggerschiff gemäß Fig. 1,

Fig. 3

den Heckbereich des Baggerschiffes gemäß Fig. 1 in der Seitenansicht

Fig. 4

den Abschnitt einer Spülleitung in der Draufsicht im Heckbereich eines Baggerschiffes gemäß Fig. 2 und

Fig. 5

einen Schnitt durch das Spülrohr einer Spüleinrichtung gemäß Fig. 4 entlang der in Fig. 4 mit V-V bezeichneten strichpunktierten Linie.

An exemplary embodiment of an excavator ship equipped according to the invention is shown in the drawing. Show it:

Fig. 1

a side view of an dredger,

Fig. 2

2 shows a plan view of the dredger according to FIG. 1,

Fig. 3

the rear area of the dredger according to FIG. 1 in a side view

Fig. 4

the section of a flushing line in the plan view in the stern area of an excavator ship according to FIG. 2 and

Fig. 5

a section through the flushing pipe of a flushing device according to FIG. 4 along the dash-dotted line labeled VV in FIG. 4.

Fig. 1 shows a dredger in side view. In particular in connection with an excavator device, this dredger has an extractable proboscis 1 which can be deployed and swung down in such a way that its free end extends over the bottom 2 of a body of water can be pulled, with channels 3 being dredged in the bottom 2 to increase the water depth. This excavator device with a proboscis 1 is arranged in the region of the bow of the dredger.

In the stern area, the dredger has a flushing device 4 with a flushing line 5. A section of the flushing line 5 is a flushing pipe 6 which runs dwars, that is to say transversely to the longitudinal direction of the ship. In the working position drawn with solid lines in FIG. 1, this flushing pipe 6 is held just above the bottom 2 and runs under the stern area of the ship.

The flushing line 5 can be brought into a rest position, which is indicated in FIG. 1 by dash-dotted lines, in which the flushing line is above the water surface and parallel to the water surface, the flushing pipe 6 running behind the stern of the ship. For this purpose, the rinsing line 5 is pivotally arranged with its free ends in the area of the ship's side wall.

From FIG. 2, which shows a top view of the dredger according to FIG. 1, it can be seen in particular that the flushing line 5 is essentially U-shaped, the flushing tube 6 being the basis of this U-shape.

Fig. 3 shows the stern area of the dredger according to Fig. 1 in side view again in an enlarged view.

In this representation of FIG. 3, the suction line 5 is shown again in more detail, also in its movement sequence when swiveling up and down. The flushing line has in its two leg regions essentially two joints 7 and 8, around which it can be pivoted or angled. In particular, the flushing pipe 6 can be pivoted about the joint 8 and additionally about a joint 9, so that the flushing pipe 6 does not get into the area of the propeller 10 of the dredger when the flushing line 5 is swung up into the rest position.

On the flushing pipe 6, a nozzle 11, which points substantially downward in the working position and with which a flushing medium jet can be generated, is indicated. This nozzle is directed somewhat obliquely against the base 2. On the front of the flushing pipe 6 pointing in the direction of travel of the dredger, a guide surface 12 is arranged along the flushing pipe 6, which is in the working position 6 just above the base 2 at approximately a 45 ° angle to the base 2, the free area 13 of the guide surface 12 is angled relative to the remaining area of the guide surface 12, in such a way that this free area 13 points approximately tangentially to the flushing pipe 6 and parallel to the base 2.

The guide surface 12 also has console-like stiffening ribs 14, which divide the area delimited from the regions of the guide surface 12, 13 into compartments or channels through which flowing water is passed, the flowing water being able to come from a natural flow of the water or else can be generated simply by the propulsion of the dredger.

4 shows a top view of the flushing pipe 6.

4, it can be seen in particular that the guide surface 12 extends almost over the entire length of the flushing pipe 6 and that stiffening ribs 14 are present at regular intervals, each of which delimits compartments or channels 15.

There may also be a plurality of nozzles 11, which are preferably arranged at regular intervals along the flushing pipe 6, for example approximately at the intervals at which the stiffening ribs 14 are also arranged.

In the area of the propeller 10, the guide surface 12 could, if necessary, have cutouts so as not to impede the pivoting process of the flushing pipe 5.

FIG. 5 shows a section through the flushing pipe 6 according to FIG. 4 along the dash-dotted line labeled V-V in FIG. 4.

In this enlarged representation of the cross section of the flushing pipe 6, the arrangement and design of the guide surface 12 and the nozzles 11 can be seen even better. The angle 16 between the corresponding radial of the flushing pipe 6 and the guide surface 12 is preferably approximately 45 °.

In addition, the course of the rinsed base 2 is indicated in FIG. 5. The water flowing in from the right in the representation of FIG. 5 is directed downwards from the guide surface 12 against the base 2 and forced under the flushing pipe 6, where there is only a small gap between the flushing pipe 6 and the bottom 2, since the flushing pipe 6 canpples is held above ground 2. The bottom 2 is flushed away below the flushing pipe 6 by this flow process. In particular, the base material whirled up by the nozzles 11 is carried along by the flowing water. As a result, a step 17 forms in the bottom 2, which also progresses in the bottom 2 as the flushing device progresses, so that the bottom 2 is ultimately lowered more deeply by this flushing and flow process. In particular, the efficiency of the flushing device is effectively increased by the guide surface 12. In addition, the base 2 is leveled by the flow process, in particular also the channels 3 caused by the proboscis 1.

Claims (8)

1. A jet pipe of a jet arrangement on a floating device for increasing the depth of a watercourse, in particular for removing mud deposits from the bottom of the watercourse, preferably for a dredger, wherein the jet pipe (6), being part of a jet line (5) for a jet medium, comprises at least one substantially radially directed nozzle (11) for producing a stream of jet medium, and a water deflecting vane (12) arranged on the outside of the jet pipe (6) and substantially extending along the jet pipe (6), characterised in that the water deflecting vane (12) is arranged on the said jet pipe (6) with an angle of inclination (16) in the angular region between a radius and a tangent to the jet pipe (6) to form a wedge shape between the water deflecting vane (12) and the bottom (2) of the watercourse to be deepened.
2. A device according to claim 1, characterised in that the water deflecting vane (12) is arranged on the jet pipe (6) with an angle of inclination of approximately 45° to the radial direction.
3. A device according to claim 1 or 2, characterised in that the water deflecting vane (12) is arranged approximately a quartercircumference of the jet pipe (6) away from the nozzle (11).
4. A device according to any one of claims 1 to 3, characterised in that the water deflecting vane (12) has a bent edge which extends parallel to the jet pipe (6) and along which the water deflecting vane (12) is bent away from the jet pipe (6).
5. A device according to claim 4, characterised in that the free, bent portion (13) of the water deflecting vane (12, 13) extends parallel to the radius, the water deflecting vane (12) starting at the point of intersection of the radius and the circumference of the jet pipe (6).
6. A device according to claim 5, characterised in that the fixed portion (12) of the water deflecting vane (12, 13) is of a length such that the free, bent portion (13) of the water deflecting vane extends substantially congruently with the tangent of the jet pipe (6), the tangent extending parallel to the said radius.
7. A device according to one or more of the preceding claims, characterised by bracket-type reinforcing ribs (14) arranged perpendicularly to the water deflecting vane (12, 13) and dividing the region below the water deflecting vane (12, 13) into sections (15).
8. A device according to one or more of the preceding claims, characterised in that the water deflecting vane (12, 13) is a deflector plate.

Images