82results about "Cable insulation construction" patented technology

The invention relates to the technical field of radio-frequency coaxial cables, in particular to a large-specification thick-wall insulating layer physical foaming radio-frequency coaxial cable and a manufacturing method thereof.The foaming insulating layer is made of crosslinked polyethylene, the melt strength of the crosslinked polyethylene is high, and foam holes formed in the high-temperature foaming process are small in size and have the advantages of being uniform and compact; therefore, a foaming insulating layer which has a large wall thickness and is not easy to generate large bubbles can be formed. And meanwhile, the uniformity of bubbles in the foaming insulating layer is further ensured by utilizing a step-by-step cooling mode. Besides, the foaming insulation layer adopts a vertical production mode, the problems of foaming holes, hole stringing, out-of-round, eccentricity and the like caused by gravity in the horizontal production process of the foaming insulation layer are avoided, meanwhile, due to the vertical production mode, the foaming insulation layer is still kept in a circular ring shape and moves downwards along with traction of the conductor during extrusion, the roundness of the foaming insulation layer is kept, and the production efficiency is improved. And the attenuation performance of the product is further ensured.

The invention relates to a high-temperature-resistant and radiation-resistant armored coaxial radio frequency cable, which comprises a copper core, a first stainless steel tube, a silicon dioxide micro powder layer, a second stainless steel tube, a copper tube and an outer shielding protection tube which are sequentially arranged from inside to outside, the silicon dioxide micro powder layer is filled in a gap between the first stainless steel tube and the second stainless steel tube, the copper tube wraps the second stainless steel tube, and the outer shielding protection tube wraps the copper tube. The armored coaxial radio frequency cable is small in outer diameter, has good radiation resistance, high temperature resistance and high signal transmission stability, and can meet the insulation requirements of high-temperature scenes such as nuclear power and the like.

The invention relates to the technical field of cables, in particular to an ultrahigh-frequency low-loss longitudinal-hole PTFE insulated coaxial cable which comprises a composite conductive bar, a silver-plated copper flat belt, a PTFE insulating layer, a corrugated aluminum belt shielding layer and a sheath layer which are sequentially connected in a sleeved mode from inside to outside. Four identical longitudinal holes are formed in the PTFE insulating layer, and each longitudinal hole penetrates through the PTFE insulating layer along the extension direction of the PTFE insulating layer; each longitudinal hole is in a crescent shape; the longitudinal holes are distributed at equal intervals in the circumferential direction of the PTFE insulating layer; and each longitudinal hole is formed in the edge area, close to the outer ring, of the PTFE insulating layer. According to the cable, the transmission efficiency is improved by reducing signal attenuation, the service life is prolonged by improving the temperature resistance level, the inner conductor and the outer conductor are structurally adjusted to ensure that the cable has certain flexibility, and energy conservation and environmental protection are achieved by reducing the use amount of rare metal.

The present invention relates to a communication line. The communication line according to an embodiment of the present invention includes at least one core portion including a dielectric core extending in a longitudinal direction and a rib member formed on an outer surface of the dielectric core, and a shielding portion including a shielding having a hollow tubular shape and a rail member formed to extend on an inner surface of the shielding and extending along the shielding in the longitudinal direction, wherein the at least one core portion is inserted into the shielding portion.

A coaxial cable includes a central conductor including a plurality of twisted conductor element wires, an insulator disposed outside the central conductor, a shield layer disposed outside the insulator, and a jacket disposed outside the shield layer. The shield layer includes a first shield layer and a second shield layer in an order from a position closest to the central conductor. The first shield layer includes a plurality of longitudinally lapped metal wires, and the second shield layer includes a metal tape disposed outside the first shield layer. An outer diameter of the central conductor is 0.2 mm or more and 0.4 mm or less, and a twist pitch of the conductor element wires of the central conductor is 6 times or more and 10 times or less the outer diameter of the central conductor.

The present invention provides a cable for high-frequency signal transmission and a manufacturing method thereof. When transmitting high-frequency signals, it is difficult for the cable to attenuate, and even when bending and wiring high-frequency signals in a narrow space, the transmission characteristics are hardly reduced. The cable (1) for high-frequency signal transmission at least includes a conductor (2), an insulator (3) covering the periphery of the conductor (2), a coating layer (4) covering the periphery of the insulator (3), and a sheath (6) covering the periphery of the coating layer (4). Among them, an anti-cracking layer (7) is provided between the insulator (3) and the coating layer (4). The anti-cracking layer (7) is arranged in contact with the insulator (3) and has a coating layer (4) on its outer surface. The anti-cracking layer (7) is composed of a resin film (71). In response to the bending of the insulator (3), it bends while relatively moving in the cable length direction, thereby suppressing cracking of the coating layer (4).

The invention relates to a cable with a conductive coating. The disclosed cable may include at least one electrical conductor, an inner electrical insulator surrounding the at least one electrical conductor, and an electrical shield disposed around the inner electrical insulator. The cable may include a conductive material disposed between adjacent layers of the cable. In one example, an electrocladding layer may be disposed in an electrical shield, for example, in an overlap region. The invention also discloses a flowable conductive material which can flow into the gap during operation of the cable.

A high-temperature resistant cable for a mobile communication base station comprising, in succession, an inner conductor, a PTFE insulating layer, an outer conductor, and a sheath, wherein the PTFE insulating layer has at least one hollow channel extending in a direction of extension of the inner conductor, wherein the outer conductor is a spiral copper tube, wherein the PTFE insulating layer is formed by extruding and sintering a pasty PTFE material to form a PTFE insulating layer blank surrounding the inner conductor, wherein the extruded PTFE insulating layer blank is dried at a temperature of 100 to 250 °C, and subsequently the dried PTFE insulating layer blank is sintered and solidified at a temperature of 400-480 °C, and wherein nano-copper oxide is added to the pasty PTFE material.

The present disclosure relates to a coaxial cable for nuclear power plants, and more specifically, relates to a coaxial cable for nuclear power plants, which includes an inner conductor arranged at a center of a cable, an insulating layer arranged in a form of surrounding an outer periphery of the inner conductor, and formed of a foaming material forming many porous cells, and a sheath layer arranged in a form of surrounding an outer periphery of the insulating layer. Activation energy of the insulating layer is within a range of 2.06 eV to 2.84 eV. Accordingly, it is possible to provide the coaxial cable for nuclear power plants which can maintain a certain level of performance even after the elapse of a specified lifespan.

A coaxial juncture assembly 10 has a characteristic impedance Z0' and comprises an inner conductive formation 32 having opposed first and second ends 34.1, 34.2 which are connectable to an inner conductor of a coaxial cable and an inner conductor 18 of a port respectively. The cable has a characteristic impedance Z0 and the inner conductor has a diameter d1. The formation 32 has an outer diameter d1', which is larger than d1. A conductive tubular member 36 has an inner diameter D1', a first end 38.1, a second end 38.2, a slot 40 and an inner surface area A'inner. The member 36 is connectable at end 38.1 thereof to an outer conductor of the cable and at the end 38.2 to an outer conductor of the port. The assembly 10 comprises a dielectric arrangement 42 having a dielectric constant εeff'. At least one of: a) εeff' and b) A'inner is configured such that a difference between Zo and Zo' is less than 3% and D1 and D1' varies by less than 5%.

A cable includes an inner conductor and a dielectric layer extending around the inner conductor. The dielectric layer includes a bi-directionally stretched polypropylene film having a porous structure that includes a plurality of pores that extend through a thickness of the bi-directionally stretched polypropylene film. The dielectric layer includes air molecules trapped within the pores of the bi-directionally stretched polypropylene film such that the dielectric layer includes polypropylene and air. The cable includes an outer conductor extending around the dielectric layer.

To provide a signal transmission cable whose transmission characteristics are not easy reduced when bent.SOLUTION: A signal transmission cable 1 comprising a conductor 2, an insulator 3 covering the circumference of the conductor 2, a shield layer 4 covering the circumference of the insulator 3, and a sheath 5 covering the circumference of the shield layer 4, wherein between the insulator 3 and the shield layer 4, a plating base layer 6 is provided so as to cover the circumference of the insulator 3, the shield layer 4 has a plating layer 41 formed so as to be in contact with an outer peripheral surface of the plating base layer 6 and so as to cover the plating base layer 6, and the surface roughness of the outer peripheral surface of the plating layer 41 is smaller than the surface roughness of an inner peripheral surface of the plating layer 41.SELECTED DRAWING: Figure 1

Electrical cables and optical waveguides are disclosed as including an electrically insulative foam. The electrically insulative foam can coat at least one electrical conductor of the electrical cable. The electrically insulative foam can coat the optical fiber of the waveguide. The electrically insulative foam can also define a waveguide.

The present invention provides a low-loss flexible coaxial cable and a manufacturing method thereof, belonging to the field of cable technology. The coaxial cable comprises an inner conductor, a dielectric layer, a shielding layer and a sheath layer which are coaxially arranged in sequence, wherein the dielectric layer comprises a cylindrical inner layer and a spiral layer, the spiral layer is a spiral structure, the outer circumferential surface of the cylindrical inner layer is provided with a spiral groove matching the spiral structure, the depth of the spiral structure sunk into the spiral groove is less than half of the wire diameter of the spiral structure, the dielectric layer also comprises an outer pressure layer located outside the spiral layer, the outer pressure layer is used to provide a preset force to hold the spiral layer tightly to the cylindrical inner layer. The present invention also provides a manufacturing method for the above-mentioned coaxial cable. The coaxial cable of the present invention can have both low loss and flexibility.

The present invention relates to a method for applying a polymer film (31) onto an electric conductor joint (2). The method comprises the steps of: - providing an electric conductor joint (2) oriented in a cable direction (Al); - providing a roll (32) with a polymer film (31); - securing an end of the polymer film (31) to the electric conductor joint (2); - moving the roll about the electric conductor joint thereby releasing the polymer film from the roll and rotating the roll about an longitudinal center axis; - orienting the roll with the longitudinal center axis parallel with the cable direction during the movement of the roll about the electric conductor joint. The present invention also relates to a machine for performing the method.

Disclosed is an armored cable assembly including a core having a notched assembly tape about a plurality of conductors. A metal sheath surrounds the core.

A fire resistant radiating coaxial cable that employs a high-silica fiberglass yarn spacer is described. The yarn material has mass fraction of silica (SiO2) between 95.0% and 96.5%, a mass fraction of aluminum oxide (Al2O3) greater than 3%, and a mass fraction of calcium oxide (CaO) less than 0.5%. The yarn can be wound in a low-helix-angle helix around the center conductor such that less than half fills the annular space between it and the outer conductor. The cable is configured to maintain a relatively coaxial relation between a center conductor and an outer conductor under intense fire conditions.

A cable includes: a core wire; a sheath covering the core wire; a shielding layer covering the sheath; and an outer insulating layer covering the shielding layer; wherein the core wire includes a pair of inner core wires and an insulating layer covering the pair of inner core wires by extrusion molding, each of the pair of inner core wires includes an inner conductor and an inner insulating layer covering the inner conductor, and the sheath wraps the insulating layer in a spiral winding way.

An article of manufacture comprising a first section having a first dielectric material and a second section having a second dielectric material and provided on an outer surface of the first section. The second dielectric material of the second section is more flexible than the first dielectric material of the first section, and the second section comprises elements of an organic material located partially on an outer surface of the second section. A coaxial cable using the article of manufacture and a method of manufacturing of the article are also disclosed.

The invention discloses a high-temperature-resistant coaxial insulation signal cable and a manufacturing method thereof, and relates to the technical field of signal transmission cables. The cable specifically comprises a signal line, a signal layer, an insulating layer and an outer sheath. The signal layer is arranged outside the signal line and is concentric with the signal line; the insulating layer wraps the peripheral walls of the signal line and the signal layer; the outer sheath wraps the outermost insulating layer; wherein the inner core cable and the coaxial cable both adopt a drawing and annealing alternating processing mode to form a signal cable with the outer diameter smaller than 3.0 mm. A signal cable with the outer diameter smaller than 3.0 mm is produced by combining a drawing mode and an annealing mode, so that the cable can fully meet the flexibility requirement and can meet the overall high-temperature-resistant performance, and when a high-temperature-resistant device is used, the problems that the high-temperature-resistant cable is poor in flexibility and prone to breakage during wiring bending are effectively solved, and the service life of the high-temperature-resistant device is prolonged. Wire harness operation after installation is improved, and reservation of follow-up maintenance space is facilitated.

A coaxial cable includes a center conductor, a dielectric coating applied to the center conductor forming an insulator surrounding the center conductor, a metallization layer applied to the insulator forming a cable shield surrounding the insulator, and an outer jacket covering the cable shield, wherein the coaxial cable has a wire gauge of 54 AWG or smaller. A method of manufacturing a coaxial cable includes providing a center conductor, coating the center conductor with a dielectric coating to form an insulator surrounding the center conductor, covering the insulator with a metallization layer to form a cable shield surrounding the insulator, and covering the cable shield with an outer jacket, wherein the coaxial cable has a wire gauge of 54 AWG or smaller.

Electrical cables and optical waveguides are disclosed as including an electrically insulative foam. The electrically insulative foam can coat at least one electrical conductor of the electrical cable. The electrically insulative foam can coat the optical fiber of the waveguide. The electrically insulative foam can also define a waveguide.

The invention provides a coaxial cable and a device testing apparatus which can be arranged at high density. The coaxial cable (40) is provided with a cylindrical outer conductor (45), an insulating part (44) covered by the outer conductor (45), and a plurality of inner conductors (41) arranged in the insulating part (44).

The present invention provides a composite cable that improves high-frequency characteristics. The composite cable (1) has a signal transmission cable (2), a pair of power lines (3), an integral braided shielding layer (5), and a sheath (6); the signal transmission cable (2) has a pair of signal lines (21) arranged parallel to each other in the cable length direction and arranged to contact each other, and a shielding layer (22) integrally covering the pair of signal lines (21); the pair of power lines (3) are arranged to contact each other and to contact the shielding layer (22); the integral braided shielding layer (5) integrally covers the periphery of the cable core (4) formed by the signal transmission cable (2) and the pair of power lines (3); the sheath (6) covers the periphery of the integral braided shielding layer (5); wherein the integral braided shielding layer (5) is arranged along the outline of the shielding layer (22) and is tightly connected to the shielding layer (22).

The present invention discloses an LNG ultra-low temperature direct current type medium voltage coaxial cable, comprising an inner conductor, a shield, an insulating layer, an insulating shield, an outer conductor, a copper tape wrap, a wrapping tape, a glass fiber protective layer and an outer sheath arranged in sequence from the inside to the outside, the inner conductor and the outer conductor respectively adopt a compact wire twisted structure, and the outer diameter of the inner conductor is not more than 6.9 mm. The LNG ultra-low temperature direct current type medium voltage coaxial cable provided by the present invention has an inner conductor and an outer conductor that are twisted compactly, and under the condition of equal cross-sectional resistance, the outer diameter is smaller than that of a conventional twisted conductor, the obtained cable has a small outer diameter, low cost, convenient installation and use, a smoother surface and no gaps, the outer conductor and the inner conductor are interconnected inside and outside, and the inner conductor shields and equalizes the electric field strength of the inner conductor, and the cable does not break down in a DC withstand voltage test of 21kV / 5min and does not crack when stretched at an ultra-low temperature of ‑276°C, is not prone to heat overload, has stable electrical properties, and has a long service life, and is suitable for ultra-low temperature occasions.

A microwave device capable of increasing an amount of heat generated at the tip end thereof. The microwave device having a central conductor that transmits microwaves, an insulator covering the central conductor, and an external conductor covering the insulator. The central conductor is exposed to the outside from a tip end of a microwave irradiation part for the first time, and an externally exposed part of the exposed central conductor is bent toward the base end side of the microwave emitting unit so as to be along the external conductor.

The invention relates to a conductor arrangement (7a, 7b) for transmitting high-frequency signals, in particular an insulated socket, preferably for a contact element (10) arranged in a test device (100), the conductor arrangement (7a, 7b) having: at least one inner conductor (1a, 1b) for transmitting high-frequency signals; a second conductor (2) separate from the inner conductor (1a, 1b), in particular an outer conductor surrounding the inner conductor; and at least one insulating element (3a, 3b) between the first conductor and the second conductor, the insulating element (3a, 3b) surrounding the inner conductor (1a, 1b) at least in sections, the at least one insulating element (3a, 3b, 3c) comprising at least two sub-regions (4a, 4b) having different dielectric constants.

An electrical transmission line cable suitable for a variety of applications including fishing lines in video fishing systems, etc. The electrical transmission line cable has a first conductor and a second conductor forming an electrical transmission line, a jacket including the first conductor and the second conductor, and a transmission line primary dielectric element separating the first conductor and the second conductor, the primary dielectric element being at least one of a woven yarn, a fiber yarn, or a monofilament. The electrical transmission line can be in a balanced or unbalanced configuration.

Electrical cables are disclosed can include at least one electrical conductor, an inner electrical insulator that surrounds the at least one electrical conductor, and an electrical shield disposed about the inner electrical insulator. The electrical cables can include an electrically conductive material disposed between adjacent layers of the electrical cable. In one example, an electrical coating can be disposed in the electrical shield, for instance, in regions of overlap. Flowable electrically conductive materials are also disclosed that can flow into gaps during operation of the electrical cable.

The present disclosure relates to a coaxial cable for nuclear power plants, and more specifically, relates to a coaxial cable for nuclear power plants, which includes an inner conductor arranged at a center of a cable, an insulating layer arranged in a form of surrounding an outer periphery of the inner conductor, and formed of a foaming material forming many porous cells, and a sheath layer arranged in a form of surrounding an outer periphery of the insulating layer. Activation energy of the insulating layer is within a range of 2.06 eV to 2.84 eV. Accordingly, it is possible to provide the coaxial cable for nuclear power plants which can maintain a certain level of performance even after the elapse of a specified lifespan.