Page 63 - Wire Rope News & Sling Technology - December 2018
P. 63

         pylene, i.e., fluorinated ethylene pro-
         pylene (FEP), in which the content
         of hexafluoropropylene is about 15%.
         The  F46  fluororubber,  as  modified
         material  of  polytetrafluoroethylene,
         can be continuously used below 200°
         C. The F46 fluororubber exhibits ex-
         cellent chemical stability, and will not
         be corroded when coming into contact
         with other chemicals,  except for the
         reaction with the fluoride element at
         high temperature, molten alkali met-
         al,  chlorine  trifluoride  and  the  like.
         And, in the prior art, there has been
         no  solutions  in  which  fluororubber,
         especially  F46  fluororubber,  is  used
         as the sheath on the outermost layer
         of cables. The insulating bush in the
         present application may be a common
         polyethylene or polypropylene plastic
         bush, or may be an F46 fluororubber
         insulating bush. When an F46 fluoro-
         rubber insulating bush is used, it has
         a thickness equal to or less than the
         thickness  of  the  fluororubber  sheath
         1, for example, 1/2 or 2/3 of the thick-
         ness of the fluororubber sheath 1.
           As shown in figures 12 and 13, there
         are four wire ropes and three signal ca-
         bles, with one wire rope being arranged
         in  the  center  of the cable,  while  the
         other three wire  ropes and the three
         signal cables being uniformly arranged
         around the central wire rope. The wire
         ropes are arranged in a Y-shape and
         the signal cables are arranged in a
         regular triangle. Each small wire rope
         7 is formed by stranding a plurality of
         wires, and the small wire ropes form,
         as a whole, a bearing component hav-
         ing an enough bearing capacity.
           In  the  preferred  implementation of
         the present application, the fluororub-
         ber sheath may have a thickness  of
         0.3-0.8 mm, preferably 0.5 mm, and a
         density of 2.0-2.5 g/cm , preferably 2.2
         g/cm . The conductor 4 may have a di-
         ameter of 3-6 mm, for example 5 mm;
         the sintered membrane may  have a
         thickness  of  0.2-0.3 mm, preferably
         0.23 mm, and a density of 1.2-2.0 g/cm ,
         preferably 1.6 g/cm ; and the insulating
         bush may have a thickness of 2-4 mm,
         preferably 2.5 mm. The wire rope has a
         diameter of 7-10 mm, preferably 8 mm;
         and the rope casing 5 has a thickness
         of 0.4-0.6 mm, for example, 0.5 mm.
         The filler has a density of 1.0-1.5 g/cm ,
         preferably 1.3 g/cm . The cable used for
         submersible pump may have a total di-
         ameter of 20-30 mm.
           As shown in figures 14 to 16, cross-
         sectional views of another three im-
         plementations of the reinforced cable
         used  for  submersible  pump  of  the
                         continued on next page

                                                            Wire Rope News & Sling Technology   December 2018  63
   58   59   60   61   62   63   64   65   66   67   68