Page 66 - Wire Rope News & Sling Technology - February 2020
P. 66

INVENTOR’S CORNER
         continued from previous page                         13, formed by the flexible cable 11 at the ends of the safety
                                                              device 10, to two parts, mutually connected in a respective
                                                              connection  area, of this conduit,  pipe or structure  under
                                                              pressure to be made safe.
                                                              Wire rope assembly unit
                                                              Pat. 10,495,180 U.S. class 1/1 Int. class F16G 11/02
                                                              Inventor: Johannes Weirich, Saarbrucken, DE.
                                                              Assignee: CASAR Drahtseilwerk Saar GmbH, Kirkel, DE.
                                                               This patent presents a wire rope assembly unit including
                                                              a wire rope and a device for assembling the wire rope. The
                                                              device is fastened at one end of the wire rope and has a con-
                                                              necting element arranged at the front on the end of the wire
         Figure 13: Second photographic  image  showing  the safety device   rope. The assembly unit has a sleeve that engages around an
         during a stage of preparation.                       outer surface of an end section of the wire rope. The sleeve
         11 can vary, and for example can be made in various diam-  is made of a material of lesser rigidity than strands of the
         eters, from 1 mm up to diameters greater than 30 mm..
           Moreover, advantageously, the flexible cable 11 can com-
         prise an external covering or layer which covers and isolates
         it externally and is such as to avoid any rubbing between
         the  ferrous  and  metallic  material  of  the  flexible  cable  11
         and the metal parts of the conduit, pipe, tubing, system or
         equipment under pressure to which the safety device 10 is
         attached. Therefore, thanks to this external insulating cov-
         ering,  the  safety device  10  can  be applied, in  accordance
         with regulations, in environments containing explosive and
         therefore at risk of explosion.
           Again, advantageously, the sliding cable 11, included in
         the safety device 10 of the invention for piping and equip-
         ment subject in their exercise to high pressures, can be con-
         stituted by the special cable, characterized by an inner core
         of steel wires,  by at least one intermediate layer,  formed
         around the metallic inner core by braided yarns of kevlar,
         i.e. of aramid fibers, and by a polyester outer layer, which is
         described in the PCT patent application, already cited previ-
         ously, PCT/IT2012/000306, in the name of the same appli-
         cant, published as WO 2013/051043 A2, and has experimen-
         tally shown to have exceptional properties and performance,
         usable in particular in the field of security. The two sleeves
         or collars 14 and 15, within which the flexible cable 11 is
         able to slide, can be manufactured in various materials such
         as aluminum, steel, plastic, composite materials, and in var-  Figure 14: Side view of the wire rope assembly unit.
         ious shapes, for example round, flat, oval, others.
           Figures  12 and 13 are  a  series  of  photographic images   wire rope and, optionally, than the connecting element. The
         which show the safety device 10 of the invention during a   sleeve is pressed, hammered and/or rolled onto the wire rope
         preparation phase before being applied on the structure or   and,  optionally, onto  the  connecting  element  to produce  a
         equipment, subject to pressure, to be made safe, and which   form-locked connection. Outer strands of the wire rope are
         are to be considered self-explanatory so as not to require fur-  separated from the wire rope in a rope section, in which the
         ther comment.                                        wire rope is arranged inside the sleeve, and the sleeve is con-
           It is only emphasized that these photographic images   nected to ends of the outer strands at its one edge.
         show how it is possible to manually adjust the amplitude of   Figure 14 shows a wire rope assembly unit according to
         the two eyelets 12 and 13, formed by the flexible cable 11,   the invention comprising a wire rope 4 and an assembly de-
         through which the device 10 is attached to the pipeline or   vice 1, which comprises a connecting element 2 and a sleeve
         similar structure in pressure to be put in safety, as also to   3. The connecting element 2 shown in greater detail in figure
         manually adjust the distance of each of the two terminals 16
         and 18, fitted to the heads of the flexible cable 11, from the
         corresponding sleeves 14 and 15, by sliding the flexible cable
         11 in the same sleeves 14 and 15.
           The photographic images also show how the two sleeves
         14 and 15 have also a guiding function to allow an operator,
         by sliding the flexible cable 11 in these sleeves 14 and 15, to
         configure the safety device 10 in the form most appropriate
         and most suitable for the application to which it is intended.
         In use, the safety device 10 is applied on a conduit, a pipe or
         a similar structure, subject to pressure, to be put in safety,
         mounting and attaching manually the two eyelets 12 and   Figure 15: Cross section of the wire rope assembly unit.

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