Boring or penetrating the earth – Miscellaneous
Patent
1989-09-29
1990-10-02
Neuder, William P.
Boring or penetrating the earth
Miscellaneous
175231, E21B 718, E21C 2560
Patent
active
049601768
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION TECHNICAL FIELD
The invention is directed to a device particularly for cutting and drilling of rock, ore, natural stone, concrete or the like or for treating objects by means of a high-pressure medium, as specified in the preamble of patent claim 1.
BACKGROUND ART
Such a device has already been known (GB-PS No. 1,460,711). In this device, a nozzle head is deflected to oscillate by means of a drive mechanism transversely to the direction of the jet of pressure medium ejected from a nozzle orifice. The drive mechanisms used therein are ultrasonic transducers, electro-mechanical transducers and also mechanically or hydraulically driven mechanisms. The nozzle had itself is supported in bearings so that it is either movable linearly or pivotable about a bearing journal. It has been found, however, that this kind of bearing is subject to rapid wear when operating with oscillatory movements of relatively high frequency, as is recommended for efficient cutting.
The same problems arise with a further known device (GB-PS No. 2,027,776) in which likewise a nozzle head including a cam is reciprocable on a linear guide path of a bearing unless a bearing journal is also used for bearing purposes. This device is used for knocking concrete off reinforcement system or for removing a flooring by means of a liquid jet.
It is furthermore known (DE-OS No. 3,516,572) to provide a nozzle head, which is mounted on a flexible high-pressure hose, with a plurality of nozzles screwed into the end face of the nozzle head. A central nozzle extends in axial direction of the nozzle head while on either side of the central nozzle two further nozzles are provided with their nozzle axes inclined relative to the axis of the nozzle head. This nozzle head has already been found satisfactory for rock cutting.
SUMMARY OF THE INVENTION
Finally it has been known (DE-OS No. 2,607,097) to mount a nozzle head provided with a nozzle on a tube which is pivotable about a swivel bearing, wherein the end of the tube remote from the nozzle head is movable on a circular path in a plane extending transversely to the tube axis by means of an eccentric member such as a crank mechanism.
It is the object of the invention to improve the device of the above-specified kind in respect of its operability. Above all, it is desirable to provide relatively narrow devices with which it is also possible to work in elongated and narrow slits, bores and similar openings, for instance in rock. Typically, the device should be intended for prolonged use. Furthermore, the operability of the nozzle head shall be improved with little manufacturing effort and little space requirement. It is desirable to achieve rapid cutting, for instance slit-like quarrying of rock, seams and the like, especially also of very hard materials such as granite and marble.
The invention is characterized in claim 1, in which at least a portion of the supply pipe is designed as a rocking pipe which is engaged by the drive mechanism, for instance, by way of a coupling means. In this connection "rocking pipe" is intended in particular to mean a supply portion to the nozzle head which supply portion upon operation moves in a way to cause the nozzle head to perform a reciprocating or circular or even oval movement, especially in a plane which extends substantially at right angles to the axis of the nozzle or the central nozzle, respectively.
This rocking or "pendulum" motion, as viewed from the side, deflects the jet laterally. On account of the "rocking" or swinging motion the jet describes a straight or arcuate line upon striking the object to be cut (provided a striking point is assumed and an otherwise static position of the device with the exception of the "rocking" supply portion is also assumed).
The drive mechanism is supported by a control pipe which extends substantially in parallel to the supply pipe.
The control pipe conducts the energy carrier for energizing the drive mechanism, for instance mechanical rotary motions, i.e. kinetic energy, to the drive mechanism and comprises
REFERENCES:
patent: 671429 (1901-04-01), Bacon
patent: 3199615 (1965-08-01), Storm
patent: 4369850 (1988-07-01), Barker
Durr Isabelle
Loegel Charles
Loegel Patrick
Reichert Sylvie
Schneider Francine
CIWJ Compagnie Internationale du Water Jet
Neuder William P.
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