Fluid sprinkling – spraying – and diffusing – Unitary plural outlet means – Plural separable nozzles on spray pipe
Patent
1986-09-17
1989-05-02
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Unitary plural outlet means
Plural separable nozzles on spray pipe
74471XY, 137636, 137867, 175424, 239578, 239588, 251294, 604 95, B25J 914, B05B 1304, E21B 4328, E21B 718
Patent
active
048260878
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to manipulative devices capable of being remotely operated.
Manipulative devices enable operations and inspections to be carried out remotely from an operator. Thus they are useful for operating on or inspecting limited access or closed sites such as when handling hazardous materials. Also it is often desirable, for example for jet cutting in borehole mining, to use a nozzle having means which allow nozzle orientation and position to be controlled remotely. This arrangement enables the cutting nozzle to approach the target formation in a water environment closely enough to retain jet cutting efficiency without impairment by jet attenuation caused by too much water between the nozzle and formation.
According to the present invention there is provided a manipulative device capable of remote operation comprising a nozzle head having one or more nozzles adapted to eject a fluid stream having a component at right angles to the axis of the nozzle head, the nozzle head being connectable by a flexible elongate member to a reference point, a means for controlling fluid flow through the nozzles, the means being capable of operation by tendons adapted to follow the curvature of the flexible elongate member whereby, in use, remote differential operation of the tendons enables spatial positioning of the nozzle head.
In one embodiment of the invention, the device is in the form of a cutting nozzle head which has a forwardly directed cutting nozzle capable of controllably jetting fluid. The fluid may be, for example, air or water. The device has a plurality of steering nozzles (preferably three) in the periphery which are capable of jetting fluid outwardly at right angles to the cutting nozzle. The fluid flow through the steering nozzles is controlled preferably by valves, the valves being remotely operable by means of tendons or control wires. The device may have a further nozzle capable of jetting fluid having a backward component of flow so as to provide a forward thrust to the carrier device. Alternatively the device may be moved by separate translational means such as mechanical operation. The device is connected to the source of remote operation by for example, a flexible inextensible hose. The tendons or control wires may be located by rings or tubes on the periphery of the hose and the tendon or control wire lengths are capable of differential variation by means of, for example, a joystick system so as to position the cutting nozzle at a desired location. This arrangement may be used, for example, to controllably hold a cutting jet against the face of a borehole.
The device may be used in various environments such as air, liquids e.g. water and slurries.
The invention will now be described by way of example only and with reference to the accompanying drawings.
FIG. 1 is a perspective view of a steerable manipulative device.
FIG. 2 is a vertical cross section through the nozzle
FIG. 3 shows a schematic arrangement of a joystick control unit for the device.
FIG. 4 shows a schematic diagram of a hydraulic system for use with the joystick.
FIG. 5 shows an arrangement using a steerable nozzle unit for borehole mining.
FIG. 6 is a vertical section through a manipulative device having a single peripheral steering nozzle.
Economic borehole mining requires that the cutting nozzle can approach close to the target formation so that attenuation of the cutting jet by the surrounding fluid is reduced. FIG. 1 shows a remotely controllable flexible nozzle which is capable of intrinsic positional feedback and self energising restoring force to counteract a disturbance from the desired position. The nozzle comprises manipulative device in the form of a nozzle head (1), a flexible hose (2) and a system of operating tendons (3). The nozzle head has a cutting jet nozzle and three peripheral steering jet nozzles (5), the steering jet nozzles having associated piston valves (6) and are capable of jetting fluid at right angles to the major nozzle head axis. The nozzle head is connected to a length of flexib
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