44results about How to "Guaranteed to be round" patented technology

The invention discloses a low friction and high strength flexible cable. Eight copper conductor units are twisted in a two-to-two manner, forming a first, a second, a third and a fourth symmetrical insulated wire pair, the external surfaces of which are respectively winded by a first polytetrafluoroethylene band. The first, the second, the third and the fourth symmetrical insulated wire pair are twisted to the outer surface of an aramid fiber reinforcing piece, forming a cable core. A second polytetrafluoroethylene layer winds around the external surface of the cable core longitudinally. The gap between the second polytetrafluoroethylene layer and the first, the second, the third and the fourth symmetrical insulated wire pair is filled with a plurality of cotton yarns. A fourth polytetrafluoroethylene band winds around the external surface of a metal shielding layer longitudinally. An oversheath layer coats the external surface of a third polytetrafluoroethylene layer. The diameter ofthe aramid fiber reinforcing piece is 200D. The invention is advantageous in that at the time of bending, the metal wire has adequate moving position without generating stretching to cause broken wires; sliding between adjacent metal wires is easier without generating static interference.

The invention relates to an auxiliary device for longitudinal wrapping of a water blocking tape, which comprises a barrel-shaped base connected with one end of the fiber optic cable preforming mold, two water blocking tape width adjustment rods and a locking mechanism fixed on the barrel-shaped base. The root water blocking strip width adjustment rod is fixed on the other end of the barrel-shaped base in sequence along the axial direction of the barrel-shaped base through a locking mechanism. Wherein, each water-blocking strip width adjustment rod is provided with an opening, and the two openings are arranged opposite to each other in the radial direction of the barrel-shaped base, and the two openings are partially overlapped in the axial direction of the barrel-shaped base. The production of optical cables using the auxiliary device for vertical wrapping of water-blocking tapes of the present invention can ensure the roundness of the longitudinal wrapping without the formation of water seepage channels, and the optical cables produced, especially the GYTA53 type optical cables, have a high pass rate.

The invention discloses an acid and alkali resistant hard aluminum type metal strand. The acid and alkali resistant hard aluminum type metal strand comprises a stressed unit positioned at the center, and a first aluminum alloy conducting layer and a second aluminum alloy conducting layer which are sequentially stranded on the outer surface of the stressed unit; a first trapezoidal aluminum conductor layer and a second trapezoidal aluminum conductor layer are sequentially stranded on the outer surface of the second aluminum alloy conducting layer; a polyester adhesive filling part is formed by mixing a first component and a second component according to the mass ratio of 1: (2-4); the first component comprises the following raw materials in parts by weight: N-307 unsaturated polyester, butyl acrylate, iso-octyl acrylate, normal butanol, methylbenzene, talcum powder, aluminum powder, calcium carbonate and triethylene tetramine. The aluminum twisted wire not only guarantees the round of a plurality of carbon fiber raw yarns in an aluminum layer, but also avoids the aluminum layer damage during subsequent use, thereby guaranteeing the reliability of electrical property, and the bending radius being reduced to 6 times the diameter of a cable.

The invention discloses an anti-sliding electric power overhead aluminum stranded wire. The anti-sliding electric power overhead aluminum stranded wire comprises a stress unit positioned in the center, and a first aluminum conductive layer, a second aluminum conductive layer and a third aluminum conductive layer which are stranded on the outer surface of the stress unit in sequence; a polyester adhesive filling part is prepared from a first component and a second component at a mass ratio of 1 to 2-4 through mixing; the first component comprises the following raw materials in parts by weight: N-307 unsaturated polyester, butyl acrylate, 2-ethylhexyl acrylate, n-butanol, methylbenzene, talcum powder, aluminum powder, calcium carbonate and triethylene tetramine; and the second component comprises the following components in parts by weight: acrylic acid, methyl methacrylate, ethylene glycol, toluene diisocyanate, dibutyltin dilaurate, benzoyl peroxide and phenyl salicylate. According to the anti-sliding electric power overhead aluminum stranded wire, the smooth and level property of the multiple carbon fiber protofilaments in the aluminum layer is ensured while damage of the aluminum layer in the subsequent use process is also avoided, thereby ensuring reliability of electrical performance.

The invention discloses a shielded data cable suitable for repeated bending, which comprises eight copper conductor units and an aramid fiber reinforcement, the copper conductor unit comprises an aramid fiber at the center, an inner conductive layer and an outer conductor layer; four symmetrical insulated wires The pair is twisted on the outer surface of the aramid fiber reinforcement to form a cable core; a second polytetrafluoroethylene layer longitudinally wraps the outer surface of the cable core, and the gap between the second polytetrafluoroethylene layer and the four symmetrical insulated wire pairs Filled with several cotton yarns; a cotton fiber thread is wound on the outer surface of the second polytetrafluoroethylene layer to form a buffer sliding layer, and the winding direction of the cotton fiber thread is opposite to the twisting direction of the four symmetrical insulated wire pairs. Wrapped side by side on the outer surface of the buffer sliding layer to form a metal shielding layer; several metal wires are wound side by side on the outer surface of the buffer sliding layer to form a metal shielding layer, and the outer surface of the metal wires in the metal shielding layer is wrapped with the first PTFE tape. The data cable of the invention has small friction coefficient, is soft and stretch-resistant, has no frictional static electricity, and can still ensure stable structure and electrical performance after frequent movement.

The invention discloses an aluminum twisted wire for overhead power transmission. The aluminum twisted wire comprises a stressed unit positioned at the center, and a first aluminum conducting layer, a second aluminum conducting layer and a third aluminum conducting layer which are sequentially twisted with the outer surface of the stressed unit, wherein the stressed unit comprises a first carbon fiber single wire and 6 second carbon fiber single wires twisted with the outer surface of the first carbon fiber single wire; polyester adhesive filling parts are filled in an aluminum layer and positioned among a plurality of carbon fiber raw yarns; the polyester adhesive filling parts are formed by mixing a first component and a second component according to the mass ratio of 1:(2 to 4); the first component comprises the following raw materials in parts by weight: N-307 unsaturated polyester, butyl acrylate, iso-octyl acrylate, normal butanol, methylbenzene, talcum powder, aluminum powder, calcium carbonate and triethylene tetramine. The aluminum twisted wire not only guarantees the round of the carbon fiber raw yarns in the aluminum layer, but also avoids the aluminum layer damage during subsequent use, thereby guaranteeing the reliability of the electrical property, and the bending radius is reduced to 6 times the diameter of a cable.