Hydrodemolition Robot Removes Concrete, Cleans Rebar

Hydrodemolition Robot Removes Concrete, Cleans Rebar
Hydrodemolition surface preparation robots from Conjet AB/National Hydro

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Hydrodemolition surface preparation robots from Conjet AB/National Hydro use high-pressure water above 14,500 psi and repetitive motion to remove concrete, clean rebar and leave a roughed surface for the adhesion of new concrete without causing cracks or damaging the reinforcement.

As an alternative to jackhammers and hand-held waterjetting, standard models include the electric-powered 327 for areas where exhaust is a problem and the diesel-powered 557. Customized models 367 (electrical) and 437 (diesel) are available by special order.

Continuous communication between the Conjet robot and enclosed powerpack/high-pressure pump unit enables the operator to activate the high-pressure pump when the robot is set to automatic mode and deactivate the pump when the automatic mode is turned off. For added safety, the integrated emergency stop enables the complete system to be turned off from the powerpack, robot or control box. The communication system is available as a cable unit or wireless kit.

Designed for confined spaces, the 327 easily passes through a 3-foot opening. It has a carrier beam of 2 feet 8.3 inches, feed beam of 5 feet 5 inches and cutting width of 4 feet 11 inches. The robot is 7 feet 8.5 inches long and 3 feet 10 inches high. It weighs 2,293 pounds. Power requirements are three-phase 380 to 480 volts, 16 amps, 50-60 Hz or three-phase, 200 volts, 32 amps, 50-60 Hz.

Features include wide-track stability, 360-degree arm, three-position feed beam and 45-degree lance angle for cutting into corners and under rebar. Track sensors control travel distance. Removable side covers enable the robot to reach into corners and partly up walls, as well as provide access to debris.

Attachments include the standard surfacing tool for flat structures, horizontal and vertical; the surface preparation tool for removing the topmost layer of concrete and steel; and the ship cleaning tool for removing paint, rust and barnacles from hulls and other curved surfaces.

Additional equipment includes base extension, arm extension, tower kit, fork nozzle, winch kit and wireless kit. The base extension is used to adjust the arm’s center of rotation when working in tunnels or pipes. The arm extension attaches to the boom arm for work in larger tunnels. The tower kit is made to remove concrete in front of the robot on high structures such as walls and pillars. The fork nozzle is mainly used for scarification. The winch kit enables the robot to work on slopes or other challenging surfaces. 517/223-0915; www.conjet.com.


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