NL7903974A - Dredger vessel with suction ladder - comprises detachable sections of standard container size and ladder slewed by ropes - Google Patents

Abstract

The dredger vessel can be separated into sections, having a ladder with an excavator, wheel or profiled suction pipe. This supports a further suction pipe running up to the bull, the end of the ladder being suspended by a block and tackle. The detachable units (8, 9) from which the vessel (1) is assembled, have the dimensions of standard freight containers, its foremost part (7) equipped with the block and tackle (11) forming a separate pontoon from which the ladder end is suspended. The ladder with suction pipe (4) has a universal pivot joint (5) coupling it to the after part (6) of the vessel, and can be swung to the side by slewing ropes (14).

Description

Hollands Aannemersbedrijf Zanen Verstoep 2ï.V., 's-Gravenhage lemen tee rb ar b agge r

The invention relates to a demountable dredger vessel, provided with a ladder, which holds a digging wheel or a profile suction tube or the like: a tool and carries one of these tools running to the hull of the vessel and the end of which is held in a hoist hangs.

The demountable dredging vessel known to them is composed of one or more mid-axle pontcas with a side pin to be attached to it on both sides. All pontoons are of fairly large dimensions and each have a weight of about a hundred or more. The center pontoons placed between the side pontoons are located in the rear part of the vessel, with a barge left between the side pontoons in the front part of the vessel, in which the ladder is pivotable in height by means of the a yoke supported as a loft on the front lateral peg supported, hoist towards its extended end.

15 The main objection of this well-known dredging vessel is that it is not possible to deploy cp projects despite its dismountability. large distance from, and not connected to, rat, waterways, and poorly accessible projects, for example in remote sand puffs or a remote (mountain) lake area. In general, the approaching and unloading of the fairly large disassembled pontoons is difficult because the transport by road of the tons of heavy units with their large dimensions often goes against the road traffic standards and is therefore not or difficult to implement.

The present invention obviates the stated drawback in that the demountable units, from which the vessel is assembled, are entirely in container dimensions, the front part of the vessel forming a separate float carrying the hoist to which the end end of the vessel ladder hangs, 30 780 3 974 Λ 2

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while the ladder with suction tube has a universal pivot connection to the rear part of the vessel and the ladder can be swung through slanting whiskers.

The units weigh only a few tens of tons 5 and this allows a disassembled piston to be transported all over the world by ship, and without special road transport permits, even over long distances. It is even possible to transport the disassembled piston by air, for example with helicopters. In addition, the units can be handled quickly and efficiently without the need for heavy lifting equipment.

The front individual float, which, as mentioned, carries the ladder hoist, is held in place by means of these ladder hoists and swings with the suction tube ladder bottom during dredging, and because the float, which can also be assembled from demountable units, is transport vessel, from which the separate complete ladder with suction tube can be suspended, it is possible with this floating unit to sail the same ladder to the main vessel and to mount it or vice versa.

Because, besides its hull sections, its equipment has also been given container dimensions, the mobile installation proposed here is a very universally applicable excavator. Parts that are not of container dimensions themselves are loaded and transported in containers.

Because the ladder with suction tube pivots about the universal connection to the rear part of the vessel, and this rear part, which forms the main hull of the vessel, is held in place with its securing cables during operation, precise cutting is made possible.

Furthermore, by the manner of hanging from a float, which is not attached to the main vessel, and the yawing of the ladder bottom end, the suction tube ladder, which is also composed of sections of container dimensions, has been extended by adding further ladder sections. can be achieved so that greater dredging depths can be achieved than is high with the hitherto known excavator wheel and cutter pistons 790 3 974 3. In addition, it has been achieved that the dredge pump always remains at the same minimum suction position of the excavator wheel or otherwise, so that the maximum piston eight on the excavator wheel is retained.

An alternative embodiment is characterized in that the float is connected by a straight guided sliding bridge with the universal connection of the ladder and suction tube to the rear part of the vessel, so that it moves smoothly in both longitudinal and transverse directions when dredging.

The invention is further elucidated hereinbelow on the basis of exemplary embodiments thereof shown in the drawing.

The single figure shows a schematic bird's eye view of the new demountable piston.

The piston 1 shown in the figure has a J5 digging wheel 2, which is held at the bottom end of the suction ladder 3.

The ladder 3 and the suction tube U carried by it have a universal connection 5 at their lower end, just like the rear part 6 of the vessel 1, which furthermore has a front part 7 formed as a separate float.

Both the front and the rear part 6 resp.

7 of the vessel 1 are composed of pontoons 8 and further pieces of equipment 9 such as machine, hrug and further construction compartments.

of ccntainer delivery. The hoist rack 10 to be aligned can also be composed of units of container dimensions. As shown, the hoisting rack 10 forms a yoke, which carries the hoist 11, from which the ladder 3 with its lower end hangs.

The ladder 3 is built up of ladder sections 12 of also controller dimensions and is thus extendable in order to be able to reach depths up to 3o. In this way, the dredge or suction, pressure porch 13 arranged on the ladder can be given a deep position, which promotes the suction effect.

The yaw threads 11 are diverted from the winches placed on deck via the deflection discs 15 at the bottom end of the ladder 3. When yawing, only ladder 3 with suction tube k 790 33 74 is required

Claims (5)

1 * t are swung around the universal joint 5, whereby the float 7 is carried along, but the rear part 6 of the vessel 1 anchored by the securing wires 16 can remain in place each time. The advance in the dredging is done by means of one or more step spuds 17 or with a puller wire 18, which is guided over a floating wire holder 19 of container dimensions. In Fig. 1, reference numeral 20 designates a sliding bridge between the side pontoons 8 of the float 7 and which, like the further side pontoons 8 of the vessel 1 are connected by staple sections 21, to the rear section 6, which is connected with the universal connection. 5 is connected and swings with it when yawing and can shift at the height of the ladder 3 in the straight guide 22. Finally, it should be noted that the exemplary embodiment proposed here is of course open to modification without departing from the scope of the invention. 1. Dismountable dredging vessel, provided with a ladder, which holds an excavating wheel or a profile suction pipe or the like tool and carries one of these tools towards the rim of the vessel and the end of which is held suspended in a hoist, characterized in that the demountable units (8, 9), from which the vessel (1) is assembled, are made in container dimensions, the front part of the vessel forming a separate float (7) carrying the hoist (11), to which the the held-out end of the ladder hangs, while the ladder with suction tube (1+) has a universal pivot connection (5) with the rear part (6) of the vessel and the ladder can be swung through slanting yaw wires (1i +) . Demountable dredging vessel according to Claim 1, 30, characterized in that the float (j), which can also be assembled from demountable units (8, 9), can serve as a transport vessel. Demountable dredging vessel according to claim 1 or 2, characterized in that the suction pipe ladder (3), which is also composed of sections (9) of container dimensions, can be extended by adding further 35 ladder sections (9, 12), 79 0 3 9 74 V A. b., Demountable dredging vessel according to any one of the preceding claims, characterized in that the float (7) is guided by a straight guided sliding bridge (20) with the universal connection (5) of the ladder (3) and suction pipe (H) with the rear section (6) is rotatably connected to the vessel (1). 5. Device substantially as suggested in the description and / or drawings. 7303374