Jumbo VibroCorer Carma®
After the samples obtained with our other Corers on fine sediment, we now also reach coarser sediments with the Jumbo VibroCorer.
JVC is a new VibroCorer with a barrel length of 6 meters and a weight of 8.200 Kg.
The innovation of this Vibro corer is the self-recovery system: once penetration is complete, a command from the deck returns the iron barrel to its original position. This greatly reduces the possibility of bending the barrels during extraction. With this feature, a ship with DP is not mandatory.
The Jumbo VibroCorer will arrive horizontally on board: the patented tilting system allows for the instrument to be positioned horizontally when close to the water surface through the action of two hydraulic cylinders. This tilting system enables the tube and structure to be positioned horizontally and readied to start the liner extrusion operation (diameter 110mm in transparent polycarbonate). This capability facilitates operations in rougher seas since the center of gravity of the instrument, when horizontal, will be significantly lower than the center of gravity of the classic vertical vibrocorer.
Furthermore, it is possible to interrupt the penetration at the desired depth thanks to the dedicated software used by operators on deck. The Client can monitor the performance of the instrument in real-time with the same software from his office, on board, or on land.
The Corer is equipped with 4 retractable stabilizers, independently hydraulically operated and equipped with a transducer, to always know the instantaneous position of each support foot with respect to the structure; the leveling function is provided by an inclinometer connected to the dedicated software. The features of the stabilizers allow to sample bottoms with slopes up to 34°! For seabeds with very low specific pressure, it is possible to equip the four stabilizers with the increased support area.
The vibrator is unidirectional with hydraulic drive, and its Force and Frequency are adjustable (0 – 54 KN and 0 – 2200 rpm/1° RPM, respectively).
There is also a quick release plier on the tube which enables quick attachment/release of the core barrel: in an extreme emergency it is possible to free the machine and abandon the barrel stuck in the seabed. This possibility is not likely, as the extraction thrust exerted with the four stabilizers reaches 200 KN in total.
The VibroCorer is controlled via a touchscreen with an umbilical cable connected to the general electrical panel and equipped with an output port for downloading data: the various working parameters and machine settings will be shown in real time on the display. The telemetry data that can be seen online from the remote-control monitor. In addition to the inclinometer and frequency, the altimeter and real-time penetration are visible.
The JVC is moved with two cables to a maximum depth of 250 meters: the dedicated winch has a 20-ton load-bearing cable. The second cable is a constant tension winch and is used for data and power transmission. In case of work in shallow water there is the capability of using the on-board crane wire and our power/data cable in place of the winch.
