Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent
1986-02-12
1987-09-29
Taylor, Dennis L.
Hydraulic and earth engineering
Underground passageway, e.g., tunnel
Boring
299 31, 405142, 405303, E01G 304
Patent
active
046966005
DESCRIPTION:
DESCRIPTION
The apparatus illustrated in FIGS. 1 and 2 (for the sake of clarity, some components have been shown in FIG. 2 in a different position or have been omitted as compared with FIG. 1) comprises a support frame designed as a whole by reference numeral 1, in which a transverse member 3 is held by plates 2 and profile supports 4 indicated only in FIG. 1. The plates 2 are connected to uprights 5, two of which in each case are connected to one another at their lower ends by a runner 6. Transverse struts between the uprights 5 have been given the nuneral 7. Such a frame can therefore rest with the runners 6 on the floor area of an adit S.
The adit S originally has a circular profile in cross-section, as produced by heading with a full-cut heading machine, tunnel-boring machine or the like.
Two holding cylinders 8, the piston rods 9 of which are connected in an articulated manner to rearward extensions 10a on holding shields 10 guided in the transverse member 3, are disposed in the transverse member. By moving the piston rods 9 out of the cylinders 8 the holding shields 10 can thus be pressed against the wall of the adit, so that the apparatus is thereby held tight in the adit. It is also possible to provide a holding cylinder on only one side and to mount the holding shield rigidly on the other side. The presence of two holding cylinders 8 offers more possibilities, however, and also makes it possible to withdraw the apparatus from the centre.
The numerals 11R and 11L designate a right-hand and a left-hand bearing housing. Each of them contains the main bearing for a boring head 12 and at the same time forms a transmission housing with drive motors 13 flange-mounted thereon, hydraulic motors or even electric motors being possible. Each boring head 12 can be driven at a rotary speed suitable for the case in question. Its axis of rotation has been given the letter D in each case.
Each bearing housing 11R and 11L is suspended on two pivot arms 14 which are held in an articulated manner in a pivot bearing 15. The pivot bearings 15, about the centre of which the bearing housings 11R and 11L with the boring heads 12 can thus pivot, are situated on the rear faces of the holding shields 10, namely in their upper portion in each case.
The end of a piston rod 18 is articulated on a pivot bearing 17 received by two joint sheets 16 on the right-hand bearing housing 11R. The end of the cylinder 19 of the said piston rod 18 is held in an articulated manner in a pivot bearing 20 which is situated in the lower part of the holding shield 10 opposite the bearing housing 11R.
The left-hand bearing housing 11L comprises two pairs of joint sheets 26 with pivot bearings 27 for the ends of two piston rods 28, the cylinders 29 of which are held at their ends in pivot bearings 30 which are disposed in the lower part of the opposite holding shield 10.
Each of the piston-cylinder units 18, 19 and 28, 29 is double-acting. Hydraulic cylinders are preferably involved here. Their pressure medium connexions are not shown. By supplying pressure medium to one or other end of the cylinder 19, the right-hand bearing housing 11R can be pivoted by the pivot arms 14 about the articulation point 15 and in this way are transferred for example from a rest position indicated in thin lines in FIG. 1 into an operative position indicated in heavy lines and vice versa. The same applies to a pivoting of the left-hand bearing housing 11L about the respective articulation point 15 by appropriate supply of pressure medium to one or other end of the parallel cylinders 29.
The cylinders 19 and 29 are dimensioned such that the same force can be applied with the two cylinders 29 as with the cylinder 19. The use of two cylinders for one of the two bearing housings has the advantage of symmetry.
By means of the cylinders 19 and 29 not only are the boring heads 12 brought from a rest position onto the wall of the adit, but the advancing movement of the boring heads 12 is also effected during operation, it being possible to set the level of the advancing force by appropriat
REFERENCES:
patent: 3695717 (1972-10-01), Birrer
patent: 4185873 (1980-01-01), Bohnes et al.
patent: 4514012 (1985-04-01), Wallace
Hurtz Georg
Krappen Wolfgang
Steufmehl Willi
Taylor Dennis L.
Wirth Maschinen- und Bohrgerate-Fabrik GmbH
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