Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Lining
Patent
1995-02-21
1996-06-04
Bagnell, David J.
Hydraulic and earth engineering
Underground passageway, e.g., tunnel
Lining
239165, 417900, E21D 1110
Patent
active
055226779
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a concreting device with a rotary column rotatable about a vertical axis on a chassis, a distribution mast pivotal about a horizontal axis on the rotary column and has at least two elongated mast arms which are movable relative to one another, a distributor arm hinged to the free end of the distribution mast, and a conveyor line for the concrete, which conveyor line extends from the rotary column to the distributor arm along the distribution mast.
BACKGROUND OF THE INVENTION
Concreting devices of this type are mainly designated for feeding concrete into tunnel forms which have several closable feed openings distributed in a longitudinal direction and a circumferential direction of the path, which feed openings are loaded with concrete through the concreting device by means of a mouth piece arranged at the end of the distributor arm. In order to simplify and accelerate this operation, it is known to design the distribution mast as a two-arm or a three-arm collapsible mast, the mast sections of which can be aligned with one another in the extended position during operation and can be folded against one another during transport. In order to be able to connect the mouth piece of the conveyor line also to differently aligned feed pipes of the form, the distributor arm can be pivoted both about the transverse axis and also about the longitudinal axis of the mast section oriented on the side of the end. By suitably arranging the operating joints and suitably dimensioning the mast sections, it is possible to utilize the concreting device also in relatively low ceiling tunnel structures. However, the lower the unfolding height of the mast sections, the smaller is the reach of the distribution mast in longitudinal direction of the path. Thus, there are limits regarding the operating height, which in the case of the known concreting device with a collapsible mast lie at approximately 4 to 5 m.
SUMMARY OF THE INVENTION
Starting out from this, the basic purpose of the invention is to provide a concreting device of the above-identified type which, in spite of a relatively long reach, can be utilized in low ceiling tunnel structures.
The solution of the invention is based on the thinking that with a distribution mast, which is exclusively assembled of mast sections, which can be telescopingly connected to one another, no unfolding and thus no additional unfolding height is needed, which limits the workable tunnel height in downward direction. Thus, it is suggested according to the invention that the distribution mast consists of at least two longitudinally telescopic mast arms, that the distributor arm is arranged pivotally about a transverse axis which is perpendicular with respect to the telescopic axis, and a longitudinal axis which is perpendicular with respect to the transverse axis, on the distribution mast, and that the conveyor line is fastened to the end of the distribution mast on the side of the distributor arm, and can be taken along during the telescoping operation in accordance with the telescopic extension, and can thereby be automatically wound up and unwound and/or can be retracted and extended and/or can be folded and unfolded.
A preferred embodiment of the invention provides that the conveyor line, which is at least partly designed as a flexible hose, can be wound automatically onto a hose drum arranged on the rotary column and can be unwound from said drum in accordance with the telescopic extension of the distribution mast. The hose drum has advantageously a motor-driven, in particular hydraulic rotary drive acting in the winding-up direction.
It is also possible as an alternative thereto that the conveyor line consists of at least two longitudinally telescoped line sections which can be automatically retracted and extended during telescoping of the distribution mast.
A further modification of the invention provides that a rigid pipe assembly is arranged between the telescopic mast arms, preferably between the ends of the first and the second mas
REFERENCES:
patent: 3212604 (1965-10-01), Garnett
patent: 3367280 (1968-02-01), Bennett et al.
patent: 3860175 (1975-01-01), Westerlund et al.
patent: 4130134 (1978-12-01), Castle
Bagnell David J.
Putzmeister-Werk Maschinenfabrik GmbH
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