Soilmec S.p.a.

Alberto Antonelli

Francesco Mantovani

Pietro Fontana

Alessio Zanichelli

Matteo Piraccini

Luigi Amoruso

An excavating machine includes an actuation unit for moving the excavator, a main winch and secondary winch for lifting and lowering the actuation unit. A closed hydraulic circuit or an electric circuit drives the main winch. An open hydraulic circuit drives the secondary winch. A first pressure or current sensor measures fluid pressure or, electric current intensity in the hydraulic or electric driving circuit. A second pressure sensor measures fluid pressure in the open hydraulic circuit. A pressure regulator regulates fluid pressure in the open hydraulic circuit. A control unit executes a combined operating condition with the winches applying a force simultaneously and based on values sensed, controls the pressure regulator so the fluid pressure in the open hydraulic circuit, during the combined operating condition, has a target value that is a function of: the fluid pressure in the closed hydraulic circuit or the current in the electric circuit.

Excavating machine with control system of the combined drive of two winches

Drilling machine () comprising: a supporting structure (); a drilling string (); a drilling head (); a flexible tensile element (); a moving device (), mechanically connected to the supporting structure () and mechanically associated with the flexible tensile element () to hold and move the drilling string (); at least one first electric motor () configured to, in a first operating mode, actuate the moving device () so as to lift the drilling string (), and configured to, in a second operating mode, apply a braking mechanical power on the moving device () so as to brake in a controlled manner the lowering of the drilling string () to reach and maintain a desired controlled lowering speed (Vd), the at least one first electric motor () being also configured to produce an electric power (Pmot); a first bidirectional electric power converter device () configured to convert the electric power produced (Pmot) into converted electric power (Pregen); an electric energy transmission network () arranged to transmit the converted electric power (Pregen); an electric power use unit () arranged to receive said converted electric power (Pregen), the electric power use unit () comprising at least one first electric energy storage system () and a prime motor () configured to generate electric power; a control group () configured to send at least one first electric control signal representative of the value of the desired controlled lowering speed (Vd); a control system () configured to generate second electric control signals based on such a first electric control signal and send the second electric control signals to the first bidirectional electric power converter device () which is configured to control the operation of the first electric motor () based on said second electric control signals received from the control system (), so that the drilling string () carries out the lowering at the desired controlled lowering speed (Vd), the control system () being of the distributed and real-time type.

Drilling machine provided with an electrically-braked moving device for the drilling string

An electronic control system for drilling devices, includes at least one pair of data-processing units (); a plurality of data-exchange lines, connected to the data-processing units () for transmission of signals from and to control devices (-) of the drilling device; and accessories () proper to the drilling device. Each of the data-processing units () is redundant by the others with one and the same level of hierarchy, and all the data-processing units () are connected to all the control devices (-) and to the accessories () proper to the drilling device through the electronic data-exchange lines that are redundant in a number equal to the multiplicity of the data-processing units ().

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Cesena, Italy

Alberto Antonelli