515results about "Apparatus for repairing insulation/armouring cables" patented technology

A method for extending the useful life of an in-service electrical cable section having at least two existing connectors attached thereto and a conductor surrounded by a conductor shield encased in a polymeric insulation jacket with an interstitial void volume in the region of the conductor. The method includes replacing each connector with a corresponding high-pressure connector, and injecting a dielectric enhancement fluid into the void volume and confining the fluid therein at a pressure sufficient to introduce at least about 0.75Q of the fluid. Wherein Q represents the weight of the fluid which would saturate the conductor shield and insulation jacket, and the void volume at atmospheric pressure being less than that which would accommodate the amount 0.75Q. The method is carried out using only a single switching cycle.

The invention discloses an electrified repair device for a cross-inked polyethylene power cable and an electrified repair method thereof. The device is characterized in that the device comprises a repair hydraulic pressure injection system, a vacuum pumping system as well as repair liquid adapters (13, 15) and taps (12, 16) which are positioned at both ends of a cable, wherein the repair liquid adapter (13) at one end of the cable is connected with the repair hydraulic pressure injection system through the tap (12), and the repair liquid adapter (15) at the other end of the cable is connected with the vacuum pumping system through the tap (16); the repair hydraulic pressure injection system is that an air compressor (1), a gas water-absorbing tank (4) and a repair liquid tank (11) are orderly connected with the tap (12) and the repair liquid adapter (13); and the vacuum pumping system is that the repair liquid adapter (15), the tap (16), a residual liquid collection bottle (17), a filtering tank (19) and a vacuum aspirator (20) are orderly connected.

The invention discloses a cross-linked polyethylene power cable nano repairing liquid and repairing method thereof, which is characterized in that inorganic nano particles and organic solvent form nano dispersion, and a layer of inorganic nano protective film is formed by filing air gaps or micropores inside the cable through the inorganic nano particles based on a siloxane repairing liquid so as to protect a polyethylene insulating layer. Compared with the traditional siloxane repairing technology, the invention can prolong the residual service life of the power cable by 5-10 times, has the advantages of advanced technology, safety and stability, short repairing time and good repairing effect.

A cable holder useful for holding a single insulated cable assembly or a multiplicity of insulated cable assemblies wherein the cable holder is formed by a pair of components attached to or integral with each other so as to form a sheath or sleeve for containing the cable assembly or cable assemblies. Adjacent metal ends of the adjoining cable parts are interconnected by a metal joint.

The invention discloses a tour inspection and restoration apparatus and method of an outer sheath of a power transmission line, and belongs to the technical field of electric power transmission lines.The apparatus comprises a body arranged on the power transmission line and connected through a travelling mechanism, and an infrared thermal imaging part, a micro camera and a restoration assembly arranged on the body; the micro camera and the restoration assembly are respectively arranged at two sides of the body along an extending direction of the power transmission line through mechanical arms; and the infrared thermal imaging part is arranged at the top of the body and located below the power transmission line. The method includes: monitoring a portion of the power transmission line traveled by the apparatus through the infrared thermal imaging part and the micro camera, analyzing obtained image information, and issuing a maintenance instruction after determining that the outer sheathof the power transmission line is in a damaged state to enable the apparatus to rapidly repair damage points. According to the apparatus and the method, the operation condition of the outer sheath ofthe power transmission line can be grasped in time, the occurrence of faults of the power transmission line can be effectively reduced, and accident hidden risks are eliminated in the bud.

A splice kit is provided for repairing a cable having a central conductor, an insulator surrounding the central conductor, an outer conductive sheath surrounding the insulator, and a jacket surrounding the outer conductive sheath. The splice kit includes a central conductor joint that is electrically conductive and is configured to engage the central conductor of the cable such that the central conductor joint defines a portion of an electrical path of the central conductor. The splice kit also includes a dielectric insert configured to at least partially surround the central conductive joint and the central conductor of the cable, and an outer sheath joint that is electrically conductive and is configured to at least partially surround the dielectric insert. The outer sheath joint is configured to be electrically connected to the outer conductive sheath of the cable such that the outer sheath joint defines a portion of an electrical path of the outer conductive sheath. The splice kit further includes a jacket joint configured to at least partially surround the outer sheath joint and the jacket of the cable.

Provided are low-melt polyimides and poly(amic acids) (PAAs) for use in repair of electrical wire insulation, flat or ribbon wire harnesses, and flat surfaces comprised of high-performance polymers such as inflatables or solar panels applications. Also provided are methods and devices for repair of electrical insulation.

A preparing liquid injecting system for the cross-linked electric cable is composed of a compressed gas tank, repairing liquid tank, connecting pipelines and liquid outlet tube. The pressure limiting valve, electromagnetic valve, pressure sensor, and liquid flow distributing plate are respectively installed to relative connecting pipelines.

The invention relates to a method for repairing a thermoplastic sheath cable. The method comprises the following steps: removing a flaw part, and cleaning a to-be-repaired part; wearing down from a position which is about 15mm away from the flaw part to form a taper, and cleaning up the taper part; getting a section of thermoplastic sheath material for repair, and cleaning up the thermoplastic sheath material and drying; heating the thermoplastic sheath material for the repair; sticking the treated thermoplastic sheath material for the repair to the flaw part, and cooling the thermoplastic sheath material; cutting off excess parts, and polishing the repaired part; twining with a bandage and covering the repaired part; heating the twined repaired part, and cooling the repaired part when the color of the repaired part becomes into the color of the repaired cable; testing the quality of the repaired part, and repairing again if testing is not ideal. The method provided by the invention has the beneficial effects that the phenomenon that a mountain of work is increased due to the fact that the cable is laid again is avoided; the phenomenon that the whole cable is wasted due to a cable sheath is damaged is avoided; complicated equipment is not used during a whole repair process, and unnecessary production cost is not increased.

The invention discloses a cable damage point detection and repair device and method. The device comprises a base assembly, a transmission assembly, a walking assembly, a packaging box, a detection assembly, a repair assembly and a control circuit. Through the cooperation of front pulley components, rear pulley components and locking components in the walking assembly, the moving manner of advancing on a cable is higher in stability compared with conventional pulleys; the device has an online autonomous detection function for cable damage points, and is more efficient, more convenient, simplerand safer compared with artificial detection; the device has an online repair function for the cable damage points, and is simple in repair structure and convenient to operate, so that the disadvantages of risk and low efficiency caused by traditional cable climbing of workers are replaced.

The invention discloses a method for intelligently repairing an insulating water tree of a crosslinked polyethylene power cable. The method is characterized by comprising the steps of determining the proportion of all ingredients of a repairing liquid according to a test value of dielectric loss angle tangent caused by the insulating water tree of the cable and injecting the prepared repairing liquid into the cable. The method has the advantages of being good in repairing effect and low in cost.

The invention discloses an online insulating property repairing method and device during operation of crosslinked polyethylene power cables and belongs to the field of cable insulation repairing. According to the online repairing method, in the cable operation process, the cables are filled with a repairing solution, that is, an electric field is provided in the cable repairing process, a water tree channel is opened, the repairing effect is better, the cable power outage repairing time is shortened, meanwhile, the cable is in both working and repairing states, and the cable operation reliability is improved. The repairing manner is characterized in that the electric field is applied to the cables, the cable repairing effect is improved, the cable power-outage maintenance time is obviously shortened, the medium and long-term repairing effect of cables as well as the repairing effect of long-distance and small-section cables are good, and the method and the device have the advantages of being advanced in technology, safe, stable, low in cost and wide in application range.

The invention discloses a device for repairing a damaged cable. The cable repair device consists of a molding die, a molding die fixing member and a UV glue pouring funnel; and the molding die comprises a die sealing member, a first transparent molding die, a UV glue horizontal flow region, a ultraviolet curing lamp, a molding die shell, a plurality of UV glue outflow ports, a second transparent molding die and a molding die UV glue injection port. By adoption of the abovementioned scheme, the glue adopted by the device for repairing the damaged cable is UV glue, the molding die is internally provided with the ultraviolet curing lamp, and thus UV glue can be cured in very short time through irradiation of the ultraviolet curing lamp, thereby saving much time for electric power workers; and the device is also provided with the UV glue horizontal flow region, the main purpose is to spread glue injected through the funnel in the horizontal flow region, and then the glue is injected to places where the cable is damaged through the plurality of UV glue outflow ports, and thus the glue can be injected to different places evenly.

The invention relates to automatic construction equipment of a power cable. The automatic construction equipment comprises a bottom plate, wherein a sleeve device is arranged at a middle part of an upper end of the bottom plate, two cable surface processing devices are arranged on the bottom plate, the two cable surface processing devices are symmetrically arranged at outer sides of a front end and a rear end of the bottom plate, and two cable transmission devices are arranged on the bottom plate and are symmetrically arranged at inner sides of the front end and the rear end of the bottom plate. By the automatic construction equipment, the problems that an insulator on a surface of the cable is needed to be processed by manual during the existing cable recovery process by manual, the cableis needed to be pulled and transmitted by manual, a copper pipe is needed to be taken and placed for abutting, a corresponding processing tool is needed to be selected according to the size of the cable during manual processing insulator on the surface of the cable, the corresponding processing tool is needed to be selected with regard to cables with different sizes, the operation is complicated,manual cable control and copper pipe abutting are not stable and a gap between the cable and the internal size of the copper pipe during the abutting process is relatively small are solved.

The invention relates to an aerial insulation wire electrification overhauling method, in particular to an aerial insulation wire electrification repairing method. The method comprises the steps that polyimide adhesive tape is wrapped on the exposed part of an aerial insulation wire through a half fold packaging method, the outer side of the exposed part wrapped by the polyimide adhesive tape is coated with a layer of teflon coating film, an injection hole is formed in the middle of the teflon coating film, and a spray gun sprays a polyurethane foam joint mixture to the position between the teflon coating film and the polyimide adhesive tape through the injection hole for joint filling. According to the aerial insulation wire electrification repairing method, the problems that the insulation performance of the aerial wire is lowered, and a grounded short circuit accident is caused due to the facts that the aerial wire is exposed and the insulation adhesive tape is aged, unglued and chapped are effectively prevented, large-area power failure is avoided, power supply reliability is provided for reducing interphase short circuits and ground faults, and hidden dangers existing when workers work are avoided.

The invention relates to the field of cable maintenance, in particular to a cable repair device and a cable repair method. The cable repair device comprises a repair shell which consists of two sub shells combined oppositely. One adjacent sides of the two sub shells are hinged to each other, and the other adjacent sides of the two sub shells can be connected by a locking device. One of the two sub shells has an adhesive injection hole. After the two sub shells of the repair shell are combined together, a cable wiring cavity with both ends open is formed. The inner diameter of the cable wiring cavity is larger than the outer diameter of a cable to be repaired. The cable repair method includes the following steps: a cable damage sheath is covered with the repair shell; the two ends of the repair shell sleeve and are in sealing connection with cable insulation sheathes at the two ends of the cable damage sheath; liquid repair adhesive is injected via the adhesive injection hole; and after the repair adhesive is solidified, the repair adhesive and the repair shell are used as a repair layer of the cable damage sheath. The cable repair device has a simple structure, and is convenient to use. The repair layer has good waterproof and damp-proof properties and high strength, and is not easy to damage.

The invention belongs to the technical field of cable repair, and specifically relates to an insulation repair method for a 10 kV high-voltage cable. According to the method, when the 10 kV three-core cable has a phase core breakdown fault, according to the damaged conditions of insulation and a wire core, three wire core bodies can be maintained without sawing three conductor wire cores of the cable if the conductor wire cores of the cable after breakdown are not obviously damaged, and the 10 kV high-voltage cable "main insulation repair" manufacturing process is employed at a fault wire core insulation breakdown position for rapid repair processing. According to the method, cable wire core insulation with fault breakdown can be rapidly, simply, and effectively repaired, and recovery of power transmission is rapidly achieved.

The invention discloses a three-core cable fusion joint, and relates to the technical field of electric power transmission. The joint comprises two mutually connected cables, an inner repairing layergroup and an outer repairing layer group, wherein the inner repairing layer group and the outer repairing layer group are used for repairing the cables, each cable includes three conductor cores and an outer protection layer group coated outside the three conductor cores, the outer protection layer group includes an inner sheath layer, an armor layer and an outer sheath layer in sequence, the outer repairing layer group includes an inner sheath repairing layer, an armor repairing layer and an outer sheath repairing layer in sequence, the outer sheath repairing layer is set to be a heat shrinkable casing, and two ends, which are lapped with the outer sheath repairing layer, of the outer sheath layer are sleeved with cold shrinkage casings. The cold shrinkable casings are great in elastic shrinkage force and can carry out permanent elastic coating on the lapping parts at two ends of the outer sheath repairing layer, thereby forming interference fit for a long time, and effectively improving the relative stability between two ends of the outer sheath repairing layer and the outer sheath layer. In addition, the cold shrinkable casings can firmly adhered to the outer side of the outer sheath layer, thereby effectively improving the waterproof performance of the cable after the repair.

The invention discloses a cable straightening repair device. The cable straightening repair device comprises a bottom frame, a straightening device, a checking device and a repair device, wherein eachdevice is mounted on the bottom frame, and is convenient to move. When a cable is wound on an upper bending wheel and a lower bending wheel, the cable is bent; defects on outer skin of the cable areamplified during bending; a first camera arranged on the upper bending wheel and a second camera arranged under the lower bending wheel acquire a cable image, and the cable image is displayed on a display screen after being processed by a processor, so that a worker finds defects on the outer skin of the cable through the display screen. After the defects are found, straightening for the cable isstopped, so that a worker pulls out insulation paste at one end from a roller and winds the insulation paste on damaged outer skin of the cable, and therefore, the cable is continuously straightened after being completely bundled at the defects. The cable straightening repair device can timely repair after finding defects of the cable, so that the service life of the cable is prolonged, and use safety of the cable is improved.

The invention discloses a cable and wire outer insulating layer repair mold. The structure comprises a repair device, a repair residual material cutting device, a base body, a fixed clamping device, abase and a moving clamping device. The base is fixedly connected with the base body. The repair device and the repair residual material cutting device are arranged on the base body. The fixed clamping device and the moving clamping device are arranged on that base. Compared with the molds in the prior art, the cable and wire outer insulating layer repair mold has the beneficial effects that the cable can be quickly clamped through the combined arrangement of the inner ring, the clamping assembly, the rotating assembly, the fastening sleeve and the U-shaped piece so that the clamping time is short, the efficiency is high, the effect is good, the repair time of the cable insulating layer is shortened, the mold can be adapt to cables with different caliber sizes, the contact area with the cable is large, the clamping degree is high, the cable can be effectively prevented from loosening during chip cutting, the insulating layer is prevented from being cut and the insulating layer can be protected.

The invention discloses a general repair method for cable damage. The method mainly comprises a step of removing an insulation damage section, namely forming an annular insulation repair notch to obtain a cable without the insulation damage section, a step of selecting an insulating layer repairing mold, wherein the diameter of a circular through hole of the mold is equal to that of an insulatinglayer, and the length is larger than that of an insulation damage section, a step of repair the insulating layer, namely placing a cable in the insulating layer repair mold, and enabling the center ofthe insulation damage section to coincide with a center of a middle section through hole of the mold, and a step of starting a mold temperature controller and an injection molding machine to carry out injection molding on the insulation repair notch to obtain a repaired cable. According to the method, various cable insulation damages can be repaired, a repairing material can reach a fine and island-type defect part, the repairing material and an existing insulating layer of the cable are fully melted, the combination is good, the thickness of a repairing layer is consistent and uniform, and the repairing quality is good.