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

The invention discloses a cable production process which includes the steps of firstly, single wire drawing; secondly, single wire annealing; thirdly, stranding; fourthly, cabling; fifthly, coating. The production process is reasonable and simple, and the produced cables are resistant to corrosion and oxidation, long in service life, suitable for various severe environments, free of electric leakage and high in safety performance.

The invention discloses a loose-tube layer-stranding cable, and a cable forming device and a cable forming process thereof. The loose-tube layer-stranding cable comprises a center reinforcing unit member and a plurality of loose tubes evenly arranged on the periphery of the center reinforcing unit member. After glue is spread onto the surface of the center reinforcing unit member, the center reinforcing unit member and all the loose tubes are spliced together to be stranded. Dry-type waterproof materials are arranged between the center reinforcing unit member and the loose tubes. The loose-tube layer-stranding cable has the advantages that stability and other performance of a cable core structure can be guaranteed without yarn winding or through winding of one to two yarns, so that production efficiency is high, proneness to cable stripping is avoided, and product quality and yield can be increased.

The invention discloses a tensile aluminum stranded wire for electric power transmission. The tensile aluminum stranded wire comprises a center stressed unit, a first aluminum alloy conducting layer and a second aluminum alloy conducting layer, wherein the first aluminum alloy conducting layer and the second aluminum alloy conducting layer are sequentially stranded on the outer surface of the stressed unit; an aluminum conductor wrapping layer is formed by stranding 19-21 Z-shaped aluminum alloy conductors with Z-shaped sections; the stressed unit comprises a first carbon fiber single wire located at the center and six second carbon fiber single wires stranded on the outer surface of the first carbon fiber single wire; the first carbon fiber single wire and each second carbon fiber single wire are each formed by stranding a plurality of carbon fiber precursors; a polyester adhesive filling part is formed by mixing a first component and a second component, and the first component is composed of, by weight, N-307 unsaturated polyester, butyl acrylate, 2-ethylhexyl acrylate, n-butyl alcohol, methylbenzene, talcum powder, aluminum powder, calcium carbonate and triethylene tetramine. It is guaranteed that the carbon fiber precursors in the aluminum layers are round and normal, damage of the aluminum layers in subsequent use is avoided, reliability of electrical property is guaranteed, and the bending radius is lowered to be six times the diameter of a cable.

The invention relates to an LVDS cable for an automobile wire. The LVDS cable comprises a sheath layer, a braided fabric layer, an aluminum foil layer, a conductor and a ground wire, wherein the conductor is wrapped by using an insulating layer, the aluminum foil layer wraps the insulation layer, the ground wire is clamped between the aluminum foil layer and the braided fabric layer, and the sheath layer wraps the braided fabric layer; the thickness of the sheath layer ranges from 0.6 to 0.8mm, the thickness of the braided fabric layer from 0.3 to 0.5mm, and the thickness of the insulating layer ranges from 0.4 to 0.7mm; and the aluminum foil material of the aluminum foil layer comprises the following components by weight percentage: 0.05-0.20% of Si, 0.02-0.08% of Fe, 0.10-0.30% of Cu, 0.70-1.20% of Mn, 0.02-0.04% of Mg, 0.002-0.008% of Zn, 0.02-0.05% of Ti, 0.001-0.05% of B, 0.02-0.05% of Y, 0.02-0.05% of Ce, and the balance being Al and inevitable impurities. The layers in the LVDS cable for the automobile wire are manufactured by adopting specific materials reasonable in compatibility, comprehensive performance of the cable is further improved, especially the strength of the cable is increased, thus loss in signal transmission is low, and anti-interference capability is high.

The invention discloses an environment-friendly cable for an automobile charging pile. A cable core is formed by regularly twisting a plurality of power core wires and a control core wire, flexibility of the cable and roundness of the cable core are guaranteed, and both a first conductor and a second conductor are formed by stranding tinned copper wires, thereby enabling the conductors to achieve excellent flexibility and roundness, and improving an anti-pressure capability of the cable; a first insulating layer, a second insulating layer, a main sheath layer and a sub sheath layer adopt irradiation insulating materials, thereby ensuring that the cable has the characteristics of flexibility, oil resistance, alkali resistance, ultraviolet resistance, wear resistance, cracking resistance and the like; and the sheath is extruded outside the cable core, thereby ensuring compactness of a cross section of the cable, and enabling the cable to have excellent anti-rolling performance.

The invention relates to a longitudinal wrap assisting device for a water-blocking tape. The longitudinal wrap assisting device comprises a barrel-shaped base, two water-blocking tape width regulationrods and locking mechanisms, wherein one end of the barrel-shaped base is connected with an optical cable preforming mold; the locking mechanisms are fixed on the barrel-shaped base; the two water-blocking tape width regulation rods are fixed at the other end of the barrel-shaped base sequentially in the axial direction of the barrel-shaped base through the locking mechanisms; each water-blockingtape width regulation rod is provided with an opening, the two openings are opposite 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. When the longitudinal wrap assisting device for the water-blocking tape is used for cable production, roundness of a longitudinal wrap can be guaranteed, no water seepage channel is formed, and qualification rate of produced optical cables, especially GYTA53 optical cables is high.

The invention discloses a flexible cable for a communication power supply. The flexible cable comprises a circular high-intensity carbon fiber core, Z-shaped conductors are twisted at the external surface of the circular high-intensity carbon fiber core and form an inner conducting layer, trapezoidal conductors are twisted at the external surface of the inner conducting layer and form an outer conducting layer, a polyethylene insulating tape wraps the external surface of the outer conducting layer, a halogen-free polyolefin elastomer insulating layer wraps the external surface of the polyethylene insulating tape, and an adhesive filling portion is arranged in an aluminum alloy layer and placed among carbon fibers. The adhesive filling portion is composed of 100 parts of maleic anhydride, 15-20 parts of butyl acrylate monomer, 20-30 parts of isooctyl acrylate, 8-10 parts of n butanol, 2-3 parts of dibenzoyl peroxide, 1.5-2.5 parts of triethylene tetramine, 1-3 parts of graphite particles, 3-5 parts of aluminum powder and 8-12 parts of diatomite by weight. The flexible cable is high in tensile intensity, current carrying capacity and flexibility, easy to bend, and tight in structure; and the minimal bending radius is reduced to 3 times of the cable diameter.

The invention discloses a bending-resistant soft data transmission cable which comprises eight copper conductor units and an aramid reinforcer, wherein the copper conductor units comprise aramid fibers located in the centers, internal conductive layers and external conductive layers; four symmetric insulated wire pairs are twisted on the external surface of an aramid reinforcer to form a cable core; a second polytetrafluoroethylene layer longitudinally wraps the external surface of the cable core; a plurality of cotton yarns are filled in gaps between the second polytetrafluoroethylene layer and the four symmetric insulated wire pairs; a cotton fiber wire is wound on the external surface of the second polytetrafluoroethylene layer to form a buffer sliding layer; a winding direction of the cotton fiber wire is opposite to twisting directions of the four symmetric insulated wire pairs; a plurality of metal wires are wound on the external surface of the buffer sliding layer side by side to form a metal shielding layer; and third polytetrafluoroethylene tapes wrap the external surfaces of the metal wires in the metal shielding layer. The data transmission cable is small in friction coefficient, soft and anti-tensile, does not generate friction static, and can still ensure stable structure and electrical performance after frequent movement.

The invention discloses an intelligent flat encircling type temperature monitoring single-core cable based on an optical fiber grating. Conductors are located at the center of a cable core, the external parts of the conductors are wrapped by an insulating layer, an optical fiber sensing unit comprises a grating optical fiber and a protection tube arranged at the external part of the grating optical fiber in a sleeved manner, the optical fiber sensing unit and a plurality of filling strips are distributed at the external part of the insulating layer in a circumferential manner to form a cable core with a circular cross section, each filling strip is formed by enclosure of an inner wall, an outer wall and two sidewalls, and the sidewalls of each two adjacent filling strips are abutted against each other. According to the intelligent flat encircling type temperature monitoring single-core cable based on the optical fiber grating with an optimized design, the structure and the design are reasonable, the grating optical fiber is arranged in the cable core, the temperature of the cable can be rapidly and accurately monitored through detection of the change of a traveling path of light inthe optical fiber, the filling strips in the cable core are designed in an optimized manner, on one hand, the cable core can be round, and on the other hand, the position of the optical fiber sensingunit is fixed during usage and the movement is avoided.

The invention discloses a cable for harbour machinery. The cable comprises wire cores, a cable core, an inner sheath, a braided layer and an outer sheath. The cable core is formed by twisting a plurality of the wire cores, the inner sheath extrudes on the periphery of the cable core, the braided layer is arranged outside the inner sheath, and the outer sheath coats the braided layer; each wire core comprises a tensile element, a conductor layer and an insulating layer; a strand wire, formed by twisting a plurality of conductor wires, is reversely and repeatedly twisted on the periphery of the tensile element to form one conductor layer; and each insulating layer coats the corresponding conductor layer. The cable for the harbour machinery has the advantages of high tensile performance, high tear resistance, oil resistance, weather resistance, high cold resistance, salt spray resistance, high flame retardance and the like.

The invention discloses a manufacturing method of a bending-resistant drag chain cable. The manufacturing method comprises the following steps: twisting a plurality of metal copper wires into a compound stranded conductor; uniformly extruding an insulating material on the outer surface of the compound stranded conductor to obtain an insulating wire core; twisting a plurality of insulating wire cores into a cable, and placing a filling rope in the center of the cable; filling a filling material around the cable to form a filling layer; and extruding an outer sheath material on the outer side of the filling layer to form an outer sheath. By adopting compound stranding, the bending resistance of the compound stranded conductor can be obviously improved, and the structural stability of the compound stranded conductor can be maintained, so that the uniform stress of the compound stranded conductor during bending is ensured, the mechanical stress concentration is avoided, and the bending fatigue life of the compound stranded conductor is greatly prolonged. The filling rope is arranged at the center of the cable, and when the cable is bent and dragged, because the outer sheath and the filling rope bear main pulling force, the structure is beneficial to dispersing bending stress, and local insulation and stress concentration of the compound stranded conductor are avoided.

The invention relates to a pre-buried composite pipe cable and a manufacturing method thereof, and belongs to the technical field of composite pipe cables. The technical scheme of the invention is that 1, a single copper wire or a single aluminum alloy wire forms a conductor (1), or multiple copper wires or multiple aluminum alloy wires are concentrically twisted to form the conductor (1), and theconductor (1) is wrapped by an insulating part (2) to form wire cores through extruding; 2, the wire cores are twisted together to form a cable core, wherein there is no wrapping and filling outsidethe cable core; 3, the cable core are extruded in a polyethylene pipe (3) and enters into the pipe, the cable core is paid off from a pay-off rack and is pulled through two pay-off machines to enter the head of a pipe-extruding machine and pass through a wire-passing die core at the head of the pipe-extruding machine, and the polyethylene pipe is extruded through the pipe-extruding machine, the polyethylene pipe outside the cable core is molded and cooled by a vacuum setting zone, and then is wound by a tractor to a reel. The method avoids secondary laying during construction, reduces construction cost, and prevents the damage to the cable caused by secondary construction from affecting normal operation of the cable.

The invention discloses a light pipeline leading-in optical cable and a manufacturing method thereof, and relates to the technical field of optical cable manufacturing, the leading-in optical cable comprises a butterfly cable subunit, a reinforcing piece and a water blocking layer, the butterfly cable subunit comprises an optical fiber, a butterfly sheath wrapping the optical fiber and the reinforcing piece embedded in the butterfly sheath, the butterfly cable subunits are respectively provided with a reinforcing piece between the gaps of the butterfly wings on the two sides; the reinforcing pieces are of a columnar structure, and each reinforcing piece is tangent to the side walls of the corresponding notches on the two sides of the reinforcing piece; the water blocking layer tightly wraps the outer sides of the butterfly cable subunits and the reinforcing parts to form a cable core structure, the cross section of the cable core structure is circular, and the reinforcing parts are tangent to the inner side of the water blocking layer; by implementing the technical scheme, the technical problems that an existing lead-in optical cable is inconvenient to construct and low in tensile strength are solved, the light pipeline lead-in optical cable which is smaller in outer diameter, lighter in weight and excellent in bending resistance is provided, construction is convenient, the tensile strength of the optical cable can be effectively improved, and then the input cost is reduced.