摘要:
A vermiculating polytoroidal thruster which provides large thrust and braking forces for various devices comprised of a plurality of inflatable bladders mounted on a spool and held in place by end plates. When the bladders are inflated, they squeeze against the inner surface of a tube or tunnel and generate large friction forces for breaking or thrusting. Thrust is provided by vermiculating motion which is generated by inflating one bladder while simultaneously deflating another. A net forward motion is achieved by providing controls for the axial expansion of the bladders. Selective inflation and deflation of certain bladders is controlled by a cycle timer and solenoid valves.
摘要:
The present invention relates to non-rolling or fixed cutter assemblies and supports for such assemblies for use on tunneling machines, raise drilling machines and other types of earth boring equipment. In particular the invention relates to cutter supports adapted for removably mounting either rolling or fixed cutter assemblies and to fixed cutter assemblies adapted for mounting in the supports. A fixed cutter assembly and support according to the invention comprises fixing means, including a fixing surface integral with the cutting element of the cutter assembly, for releasably fixing the cutting element against rotation relative to the support.
摘要:
A machine for making tunnels through rock by slitting the tunnel front wall by means of high speed liquid jets which machine comprises a main frame, a carrier movably mounted thereupon, a cutter unit movably mounted on the carrier, whereby the cutter unit is able to cover the tunnel front wall with slots. The cutter unit consists of high speed jet generators which are powered by a non-movable low pressure driving fluid source on the main frame. Impacting devices are provided for breaking down of the remaining parts of the rock intermediate the slots.
摘要:
A remote-controlled tunnel boring machine for drilling a substantially horizontal tunnel in a formation includes a rotary drilling head at the heading of the tunnel, and a rotary drill pipe coupled to the drilling head and extending back to the portal of the tunnel for connection to drive means for rotating the drill pipe. The drilling head has fore and aft sections which are movable longitudinally relative to each other, the aft section being coupled with a series of interconnected tunnel liner sections jacked into place behind it from the portal as the drilling head advances through the tunnel. Hydraulic rams between the fore and aft sections periodically advance the drilling head to excavate material at the heading of the tunnel, the weight of the aft section and the tunnel liners acting as a thrust base or back-up for the extension of the rams. A second set of hydraulic rams at the portal periodically force new tunnel liner sections into place behind the string of tunnel liners. Cuttings are continuously removed from the tunnel heading by drilling fluid circulated in a closed system which includes an elongated conduit extending from the portal to the drilling head to continuously supply drilling fluid to the tunnel heading. The cuttings and drilling fluid are continuously returned from the tunnel heading to the portal area through the interior of the constantly rotating drill pipe. A ring-shaped inflatable balloon between the fore and aft sections of the drilling head forms a fluid-tight seal between the inner wall of the tunnel and the exterior of the drilling head to provide controlled hydrostatic fluid pressure at the tunnel heading.
摘要:
A tunneling machine includes a support frame, a rotatable cutter head, and inside roller cutters and gage roller cutters for cutting or crushing the end face of a tunnel. Each gage cutter has a gage scraper with a scraper blade engaging the tunnel surface for clearing materials from the path of the gage cutter. A spring biases the scraper blade toward the tunnel surface, and the scraper blade is pivotally mounted with respect to the cutter head for movement toward and away from the tunnel surface along an arcuate path. A bolt head in the arcuate path provides an adjustable stop for preventing excessive outward travel of the scraper blade when a void is encountered in the tunnel surface. The bolt also provides a release means to displace the scraper blade away from the tunnel surface to permit removal of the scraper blade.
摘要:
A tunnel driving machine includes an elongated machine frame having a central large frame portion accommodating a tunnel tool driving gearing and the associated driving motors and a forwardly extending and rearwardly extending tubular frame portion. The forwardly extending portion accommodates the main shaft for the forward driving tool and it is supported on front bracing in a manner permitting its longitudinal shifting movement relative to the bracing. A rearwardly extending tubular portion is supported in rear bracing which permits a longitudinal shifting movement. In addition to the front and rear bracing, there is a front support and a rear support for the tubular frame which may be selectively engaged with the tunnel wall during the times at which the front and rear bracing are removed from tunnel-wall engagement and shifted longitudinally. The construction includes driving motors connected between the main frame and the front bracing and main bracing and the rear bracing for facilitating advancing movement of each bracing element within the tunnel during those times at which the frame is supported on the front and rear supports.
摘要:
To modify a given profile of an adit, tunnel, gallery or the like, particularly a circular profile so as to give it the shape of a vault, a sequence of individual recesses are made in the longitudinal direction in the wall of the adit by a boring head advanced in the direction of its axis of rotation and transversely to the longitudinal direction of the adit. The recesses preferably overlap one another. Apparatus for implementing the method comprises a heading device for moving in the direction of the wall of the adit a boring head provided at its front end with tools.
摘要:
A tunnel driving apparatus with a cylindrical shield in which is mounted a cutting head which serves to detach material from a working face to effect driving of the tunnel. The cutting head is driven by a shaft which extends through a thrust ring to which a circular array of hydraulic rams concentric with the axis of the shield is connected. This thrust ring, which supports the cutting head, is connected through universal joint assemblies to guide members which slidably locate in guideways extending longitudinally of the shield.