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Robot
302 Conjet AB has upon request from one Swiss customers developed the compact Conjet 302 hydrodemolition Robot, which was specified to remove weakened and damaged concrete from the wall and floor of a 6 km long small, only 1.5 by 1.5 meter, water tunnel.
The Robot 302 consists of a crawler mounted undercarriage unit powered by a remote and separate CCU 176 computer controlled, electrically powered hydraulic unit, which allows progress of the hydrodemolition process to be safely controlled and monitored away from the hazardous cutting area. The CCU can be located more than 50m from the Robot outside the tunnel, bridge deck box or on top of a dock or quay wall. The remotely controlled tracked Robot, which can adjust its tracks to suit the shape of the tunnel invert, carries a special hydraulically driven rotor complete with two or four high-pressure water jetting nozzles. The rotor is mounted on a rotating and telescoping boom, which allows the cutter head to constantly follow the tunnel wall profile and maintain the nozzles' preset angle of attack to the concrete. Maximum concrete removal depth with the rotor cutter is 50mm. However, much deeper cuts can be made when fitted with the optional single nozzle mounted on an oscillating cassette and 1m long feed beam. Water, at pressures of 1500 bar to 2500 bar and respective flows of 115 litres/min or less, is fed to the rotor from a 350 kW diesel driven high-pressure pump housed in a sound insulated standard 20 ft ISO container. The water jet penetrates the damaged surface creating a hydraulic pressure in the concrete, which breaks and lifts away when the internal pressure rises above the tensile strength of the concrete. All functions on the Robot 302 are operated by the CCU 176, which incorporates an advanced computerised closed loop control, monitoring and display system. This system is extremely flexible and very easy for the operator to use and optimise production. It displays and stores all the relevant parameters and machine performance data, which can be printed or downloaded to a PC for future reference or used in estimating future hydrodemolition projects. The operator chooses one of several pre-loaded software programmes to ensure that only the concrete to a predetermined quality depth is selectively removed in a continuous, uniform and safe operation. Additional programmes are available on request to suit customers' individual requirements and the operator can also easily adapt and program the computer on site to match a specific operation or set the computer to memorise and save specific working settings for future use.
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| Produced
by Blueline Design | |
The
small, lightweight, water resistant unit is exceptionally manoeuvrable
and ideal for working in areas inaccessible to the standard larger Conjet
Robot water jetting hydrodemolition equipment. It is exceptionally narrow
and can pass through an 850 mm wide opening making the Robot 302 ideal
for working in small tunnels, culverts, inside concrete box girder bridge
decks and under quay wall parapets. The unit is also exceptionally efficient
for use in numerous industrial cleaning applications, especially in small
spaces and other areas of restricted access.
