HYDRODEMOLITION APPARATUS FOR OVERHANGING INCLINED SURFACES

Abstract

A hydrodemolition apparatus provides multiple degrees of freedom enabling the treatment of overhanging or vertically inclined surfaces. A nozzle wall or track is pivotable to present the nozzles substantially normal to the overhanging or inclined surface. The nozzle wall or track is positioned proximate to the inclined surface by a combination of a vertically displaceable carriageway, a laterally displaceable carriage and an elongated member that terminates in the pivotable nozzle wall or track.

Claims

1. Apparatus for treating a surface having an inclination with respect to the vertical plane using high-pressure water, comprising: a vertically extending frame; a horizontally extending carriageway movable in the vertical direction along said frame; a carriage displaceable horizontally along said carriageway; an elongated member mounted to said carriage, said elongated member extendible and retractable in a direction perpendicular to said carriageway; a nozzle mounted at an end of said elongated member and adapted to pivot about a horizontal axis so as to present said nozzle at an inclination with respect to the vertical plane; at least one high-pressure water nozzle adapted to reciprocate along a longitudinal axis of said nozzle; wherein pivoting said nozzle about said horizontal axis orients said nozzle to direct high-pressure water at an upward angle.

2. The apparatus of claim 1 wherein said nozzle is mounted in a substantially planar nozzle wall and said nozzle wall comprises at least one slot extending along a longitudinal axis of the nozzle wall and said at least one high pressure water nozzle is adapted to reciprocate along said at least one slot.

3. The apparatus of claim 2 wherein said nozzle wall is adapted to pivot about said horizontal axis by means of a hydraulic cylinder extending between said nozzle wall and said elongated member.

4. A method of treating a surface using high-pressure water, said surface having a portion that is inclined with respect to a vertical plane, comprising: providing an apparatus having a vertically extending frame; a horizontally extending carriageway movable in the vertical direction along said frame; a carriage displaceable horizontally along said carriageway; an elongated member mounted to said carriage, said elongated member extendible and retractable in a direction perpendicular to said carriageway; a straight elongated track mounted to an end of said elongated member for guiding one or more high-pressure water nozzles along said track; and, said track pivotable about a horizontal axis so as to present said track at an inclination with respect to the vertical plane; positioning said frame adjacent said surface in a first position and while said frame is in said first position: positioning said carriageway at a vertical height in relation to said frame, said carriage in relation to said carriageway and said elongated member in relation to said carriage, so as to present said track proximate to said portion of said surface; angling said track such that a longitudinal axis of said track is substantially parallel to said portion or to a tangent to said portion; and, actuating said high-pressure nozzles to direct water toward said portion.

5. The method of claim 4 further comprising the steps of: moving said nozzles along said track; and, moving said carriage horizontally along said carriageway; as said nozzles emit high-pressure water toward said surface whereby to treat a horizontal swatch of said surface.

6. The method of claim 5 further comprising the steps of: modifying a vertical position of said carriageway in relation to said frame; and, repeating the steps of claims 4 and 5 in said modified vertical position of said carriageway.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] At least one mode for carrying out the invention in terms of one or more examples will be described by reference to the drawings thereof in which:

[0016] FIG. 1 is a front perspective view of the apparatus according to the preferred embodiment;

[0017] FIG. 1A is a detail perspective view of a portion of the carriageway and frame of the apparatus of FIG. 1;

[0018] FIG. 2 is a rear perspective view of the nozzle wall and showing the pivoting attachment of the nozzle wall to the elongated member;

[0019] FIG. 3 is a front perspective view of a portion of the nozzle carrier;

[0020] FIG. 4 is a side elevation of the apparatus showing the tilt feature of the nozzle wall;

[0021] FIG. 5 is a side elevation of the apparatus treating an overhanging inclined surface (in this case a wall);

[0022] FIG. 6 is a side elevation of the apparatus treating a first section of the underside of a boat hull;

[0023] FIG. 6A is a rear view taken along lines 6A-6A of FIG. 6;

[0024] FIG. 7 is a side elevation of the apparatus treating a second section of the underside of a boat hull;

[0025] FIG. 7A is a rear view taken along lines 7A-7A of FIG. 7; and,

[0026] FIG. 7B is a rear view of the installation of FIG. 7 with the carriage displaced to the right and the nozzles displaced to the upper portion of the nozzle wall.

[0027] For the sake of simplifying the views, the apparatus of the preferred embodiment is illustrated without hydraulic, air, electrical and water hose lines.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)

[0028] Referring to FIGS. 5, 6 and 7, the apparatus of the invention is adapted to treat an overhanging inclined surface 1 that lies at a non-vertical angle and that extends outward and upward. The surface may be a wall as shown in FIG. 5 or a compound curved surface 4 such as a boat hull 6 as shown in FIGS. 6 and 7.

[0029] Referring to FIGS. 1 and 1A, a vertically-extending frame 10 may consist of a base 12 and vertically extending sides 14, 16. Cross-brace members 18 are provided as needed for structural rigidity. The frame may be installed on the ground or on a vehicle, vessel or platform. If installed on the ground, it may be provided with ground-engaging wheels 20.

[0030] A carriageway 22 extends horizontally on or within the frame, for example between the two vertically-extending sides 14, 16 of the frame 10. The carriageway 22 may be a single solid beam or a truss arrangement of structural elements as shown in FIG. 1. The carriageway 22 is adapted to travel vertically along the sides 14, 16 of the frame as indicated by arrow 24, such as by means of a rack 26 formed in the vertical sides 14, 16 and pinions 28 mounted on the ends of the carriageway.

[0031] A carriage 30 is mounted on the carriageway 22 for horizontal displacement along the carriageway in the direction of arrow 32, such as by pinions 38 attached to carriage 30 and meshing with a rack 40 formed on the carriageway 22.

[0032] The carriage 30 supports an elongated member 34 extending perpendicularly to the carriageway 22.

[0033] The elongated member 34 may in turn be retracted and extended from the carriageway 22, as indicated by arrow 35, by means of rollers or pinions 42 attached to carriage 30.

[0034] It will be appreciated that vertical displacement of the carriageway 22 in relation to the frame 10, horizontal displacement of the carriage 30 on the carriageway 22 and extension and retraction of the elongated member 34 in relation to the carriage may be actuated by any suitable means, such as motors or pulleys.

[0035] Referring to FIGS. 1 to 3, an end of the elongated member 34 supports a substantially planar nozzle wall 50. The nozzle wall 50 is the staging structure for at least one, but preferably two high-pressure water nozzles 52 mounted on a nozzle carrier 53 that reciprocates along a longitudinal axis 54 of the nozzle wall in the direction indicated by arrow 56 along slots 58, 60 formed in the nozzle wall 50.

[0036] The attachment of the nozzle wall 50 to the elongated member 34 is a pivoting one about a horizontal axis 62, as best illustrated in FIG. 4. According to the preferred embodiment, the attachment point is a hinge 64 and pivoting is actuated by a hydraulic cylinder 66 extending from the elongated member 34 to the nozzle wall Pivoting of the nozzle wall 50 acts to present the nozzle wall 50 at an inclined angle (position 51) with respect to the vertical plane allowing the water to be directed at an upward angle. The angle may be selected to be substantially normal to the overhanging inclined surface 1, 4. Preferably, nozzles 52 rotate in use, as shown by arrows 70.

[0037] FIG. 5 shows the apparatus of the preferred embodiment in use to treat an overhanging wall surface 1. Cylinder 66 has been actuated to pivot the nozzle wall 50 at an angle that corresponds to the inclination angle of surface 1. Nozzles 52 are thereby able to direct high-pressure water toward the surface 1 in a direction 72 that is substantially normal to the surface 1.

[0038] FIGS. 6, 6A, 7, 7A and 7B illustrate the use of the apparatus to treat a curved wall comprising non-vertical inclined portions 80, 82 and including an overhanging portion 84. In FIGS. 6 and 6A, the carriageway 22 is positioned vertically along the sides 14, 16 so that the nozzle wall 50 aligns with an overhanging portion 84 of the boat hull 4. Cylinder 66 has also been actuated so as to present the nozzle wall 50 substantially parallel with portion 84 so that the nozzles 52 may direct high-pressure water at a substantially normal angle (as indicated by arrow 72) to the hull portion 84. Elongated member 34 has been extended to be proximal to the hull portion 84. FIG. 6A is a rear view of the installation of FIG. 6 showing the carriage 30 about mid-way along the lateral extent of the carriageway 22. In operation, carriage 30 is reciprocated horizontally along the length of carriageway 22 to treat a horizontal swath of the wall surface.

[0039] In FIGS. 7 and 7A, the carriageway 22 has been displaced upward in relation to its position in FIGS. 6 and 6A so as to reach the higher hull portion 82. Cylinder 66 has been retracted to make the nozzle wall 50 substantially parallel with portion 82 and elongated member 34 has been withdrawn to accommodate the relative proximity of portion 82 to the apparatus 10. In FIGS. 7 and 7A the nozzles 52 are disposed in the lower portion of the nozzle wall 50 and the carriage is disposed in the left portion of the carriageway 22. In FIG. 7B, the carriage 30 has travelled to the right portion of the carriageway 22 and the nozzles have reciprocated to an upper portion of the nozzle wall 50.

[0040] It will be appreciated that the translation of the carriage 30 along the carriageway and of the nozzles 52 vertically along slots 58, 60 allow the apparatus to treat a horizontal swath of the wall surface. Displacement of the carriageway 22 vertically in relation to the side members 14, 16 allows a vertical extent of the wall surface to be treated.

[0041] In an exemplary operation, the apparatus is positioned a suitable distance from the overall surface to be treated having regard to the reach of the elongated member 34. The carriageway 22 is position sufficiently low along the sides 14, 16 to align the nozzle wall 50 with the lowermost portion of the surface 4. The cylinder 66 is actuated to angle the nozzle wall 50 to be parallel with the lowermost portion of the surface 4 to be treated and the elongated member is extended to bring the nozzle wall in proximity to the surface 4.

[0042] The nozzles 52 are actuated to direct jets of water toward the surface as the nozzles are reciprocated along the longitudinal extent of the nozzle wall 50 along slots 58, 60, allowing the nozzles to work a vertical extent of the surface 4. At each nozzle reciprocation cycle, the carriage 30 is incremented laterally along carriageway 22 to gradually work a horizontal extent of the surface 4. Once the carriage 30 has incremented the full lateral extent of the carriageway 22, the carriageway 22 is incremented vertically, with a corresponding adjustment of cylinder 66 and elongated member 34 to maintain a consistent spacing of nozzle wall 50 from the surface 4 and to maintain a substantially parallel (or substantially tangent where the surface curves sharply) relationship to the surface 4. The nozzles 52 are actuated and reciprocated along the nozzle wall 50 once again, and at each reciprocation cycle, the carriage 30 is incremented laterally. The process is repeated for the various parts of the overall surface 4 by selectively actuating the cylinder 66 to maintain the nozzle wall 50 in a substantially parallel or tangent relationship with the local surface to be worked, by retracting or extending the elongated member 34 to maintain a consistent spacing between the nozzle wall 50 and the local surface 4 and by raising or lowering the carriageway 22 to accommodate the different heights of the local surface 4.

[0043] While the preferred embodiment has been described by reference to the use of a substantially planar nozzle wall, any straight track along which the nozzles may be guided would be suitable, provided that the track may be angled to be substantially parallel to the overhanging or inclined portion of the surface to be treated, or if the portion is curved, parallel to a proximate tangent of that portion.

[0044] The invention provides the ability to use a single apparatus that is adapted to offer several degrees of freedom in orienting and positioning nozzles to work the surface, including orienting a nozzle wall at an angle that is substantially parallel or tangent to an overhanging segment of a surface to be treated.

[0045] In the foregoing description, exemplary modes for carrying out the invention in terms of examples have been described. However, the scope of the claims should not be limited by those examples, but should be given the broadest interpretation consistent with the description as a whole. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.