402 results about "Overhead cable" patented technology

The invention discloses a computer design method of a standard distribution network line. The computer design method of the standard distribution network line comprises the steps of drawing construction diagrams of overhead power distribution lines and cable lines according to distribution line design requirements and a standard diagram, accurately counting materials required by a project, and automatically generating various kinds of report forms. According to the computer design method of the standard distribution network line, the ERP (Enterprise Resource Planning) material entering process can be greatly optimized, and moreover, a preliminary budget of the material part can be automatically embedded into a rural network project preliminary budget template, and the differences between the construction diagram and an as-constructed diagram are analyzed to generate a material balance sheet after the construction diagram and the as-constructed diagram are accomplished, so that a data support is provided for the material recovery, the project auditing and the construction cost, the project materials can be managed and controlled, and create favorable conditions are created for the fixed-assets management, the base data management and the distribution network operation and maintenance management of the post-stage project.

The invention provides a silane crosslinked low retraction polyethylene plastic and an application of the same, the components and parts by weight include 100 parts of polyethylene resin, 0.01-3 parts of weather resistant additive, 0.1-20 parts of metal oxide, 0.01-10 parts of color master batch, 0.5-3 parts of silane crosslinked agent, 0.01-1.5 parts of initiator, 0.02-2 parts of antioxidant, 0.05-1 parts of metal passivator and 0.01-5 parts of catalyst. The invention can produce silane crosslinked polyethylene insulating plastics with various colors meeting the weather resistant requires for overhead cable, in particular, the grey product can decrease the acceptance degree of environmental thermal radiation of the cable, increase the current carrying capacity of the overhead cable and meet various needs of different levels of the overhead cable.

An external suspension system for supporting an inflatable air duct includes a series of external hangers that help hold the duct open while the duct is deflated. In some embodiments, the suspension system supports the duct at a series of points that are broadly distributed in a staggered pattern across the duct, yet the entire duct can be suspended from a single overhead cable, even if the duct is a stepped tube with multiple diameters. The system includes novel ways of locking the hangers to the duct and to the overhead cable.

The invention provides a quantum key distribution system based on fast polarization feedback. The system comprises a quantum key distribution transmitter and a quantum key distribution receiver, wherein the quantum key distribution transmitter and the quantum key distribution receiver are arranged at two ends of a power overhead cable; the quantum key distribution transmitter comprises a quantum key distribution (QKD) transmitting end and a fast polarization feedback receiving end; the quantum key distribution receiver comprises a QKD receiving end and a fast polarization feedback transmitting end; the QKD receiving end is used for receiving a quantum key; the fast polarization feedback transmitting end is used for transmitting and modulating the linear polarization light; the QKD transmitting end is used for transmitting the quantum key; the fast polarization feedback receiving end is used for receiving and demodulating the linear polarization light. Compared with the prior art, the quantum key distribution system based on fast polarization feedback provided by the invention is used for tracking feedback of quick polarization by adopting an optical fiber link opposite to normal QKD, the polarization change of a quantum key transmission signal in the overhead cable can be quickly detected and the variation can be compensated. Thus, the condition that QKD equipment at the other end of the overhead cable normally works is ensured.

An overhead cable management for charging an electric vehicle employs a reel which receives a cable with an EV connector. A drive assembly employs a bi-positionable clutch and a gear assembly which sequentially engages a drive gear for the reel to unwind the cable from an overhead position to an ADA height, allow the cable and connector to be extended to connect with the EV and to wind the cable until a locked home position is obtained. The cable management is incorporated into an EVSE which is ceiling mounted, or an EVSE which is mounted to a pole or a wall. Numerous modules and features are optionally employed in connection with the operation of the cable management.

The invention, which belongs to the technical field of power fault location, discloses a fault positioning method for an overhead cable hybrid line. The method comprises: installing fault current detecting devices at a hybrid line bus and all connection points and determining a fault branch of an overhead cable hybrid line according to directions of fault current signals detected by the fault current detecting devices; determining a fault point position based on a calculation formula of the fault point position under the condition of knowing the fault branch; and establishing an overhead-cablehybrid line simulation model and verifying correctness of the fault point position based on the fault types of all detection points in the simulation model. With the method, the fault point can be located quickly and accurately; faults can be eliminated timely; and power supply can be restored. And thus the power supply reliability of the entire system is improved.

The invention relates to a double-end range finding method for a single-phase earth fault of an overhead-cable mixed line. The method comprises: according to positive-sequence components of three-phase voltages and currents of a front end and a tail end in a normal condition of an overhead-cable mixed line, non-synchronized angles delta of currents at the two ends of the overhead-cable mixed line are calculated; power frequency components of the three-phase voltages and currents at the front end and the tail end of the overhead-cable mixed line after a single-phase earth fault are extracted by using a differential fourier algorithm; symmetric component conversion is carried out on the power frequency components of the three-phase voltages and currents at the front end and the tail end of the overhead-cable mixed line after the single-phase earth fault to obtain sequence components of the voltages and currents at the front end and the tail end of the overhead-cable mixed line after the single-phase earth fault; a sequence component of the single-phase earth fault current of the overhead-cable mixed line is calculated; and the fault point position is determined based on a one-dimensional iterative searching algorithm. Compared with the prior art, the provided method has characteristics of accurate range finding and high efficiency.

An overhead installation for transporting people in an urban environment includes two carrying cables, which sag in curved manner and are spaced apart from one another, on which the rollers of the vehicle without a hanger arm run. Jacks with vertical displacement, controlled by a central unit, are placed in the connection between the rollers and the vehicle so as to reduce transmission of undesirable movements, resulting from the sag of the cables, to the car of the vehicle.

The invention discloses an overhead power cable and an arrangement method thereof. The overhead power cable comprises a cable wire which is sheathed by heat-shrinkable insulating tubes with a quantity equal to the quantity of required needle-type ceramic bottles. The length of each heat-shrinkable insulating tube is greater than the diameter of each ceramic bottle. The arrangement method of the overhead power cable is as below: when cable layout is carried out, sheathing the heat-shrinkable insulating tubes with the equal quantity on the cable wire; and when the overhead cable arrangement is carried out, heating the insulating tubes on the cable in a manner of corresponding to the positions of the ceramic bottles, fixing the insulating tubes at ceramic bottle contacting positions and then mounting the insulating tubes in grooves of the ceramic bottles. The cable has the advantages of simple structure, convenient arrangement, good short-circuit prevention effect and power supply safety guaranty.

A system including an overhead cable pathway structure and an adapter panel or cable termination device that mounts overhead to the cable pathway structure. The cable termination device including a plurality of adapters and a cable pathway exit having a curved surface that guides cables exiting from the overhead cable pathway structure to the adapters.

A transmission line assembly for transmission and distribution of high voltage power which comprises a conductor, a separate messenger member and coupling means. The conductor has a predetermined length. The separate messenger member has a predetermined length. The coupling means couples the messenger to the conductor to the messenger. The messenger member and the conductor remain structurally separate from each other and functionally independent.

The invention discloses a power transmission line fault location method based on line parameters, and belongs to the technical field of high-voltage power transmission. According to the fault location method of the invention, fault location is conducted based on the electric parameters of a single side or double sides of a power transmission line, a 'cable-overhead-cable' hybrid segmented line parameter model is used in fault location, the 'cable-overhead-cable' hybrid segmented line parameter model divides the transmission line into a cable segment L1 and a cable segment L2 at the two ends and an overhead line segment L3 in the middle, and L1, L2 and L3 are of lengths of corresponding segmented lines. The invention further discloses a fault location module of a relay protection device. Fault location error caused by line parameter asymmetry can be effectively eliminated. After the method is applied to the relay protection device, the sensitivity and reliability of the relay protection device can be improved. A faulty site can be located accurately, and the workload of the transmission line maintenance staff can be reduced.

The invention provides a method for producing a steel wire for a steel core of an ultrahigh-strength overhead cable by using an 82B steel wire rod. The method comprises the steps of selecting the steel wire rod with diameter less than or equal to 8 mm and initial anti-tension strength more than or equal to 1150 MPa; washing with acid and phosphating; drawing; and carrying out zinc plating for future use. According to the ultrahigh-strength zinc-plated steel wire with diameter of phi 1.60-2.60 mm, which is provided by adopting the ordinary 82B steel wire rod as a raw material, the steel wire rod has no need of being subjected to lead quenching treatment and is directly drawn, so that the pollution to environment can be reduced, thermal treatment processes of lead quenching and the like can be eliminated, and maintenance of the corresponding equipment can be reduced. Furthermore, under the condition of simple components, the anti-tension strength of the produced steel wire is at least 1900 MPa; the 1% extension stress is at least 1600 MPa; and the twist frequency is at least 20 times.

The invention relates to a suspended type overhead cable coating robot. The suspended type overhead cable coating robot comprises a shell, a controller, a traveling mechanism and a coating mechanism,wherein the controller, the traveling mechanism and the coating mechanism are arranged inside the shell; a notch is formed in the side wall of the shell; limiters are arranged at two ends of the notchseparately; a battery is arranged inside the shell; the traveling mechanism comprises driving wheels, a driven wheel and a brush wheel; the driving wheels and the brush wheel are arranged on the upper portion of a cable; the driven wheel is arranged below the cable; the driving wheels and the driven wheel are provided with grooves matched with the cable; and the brush wheel is connected with a drive motor. The suspended type overhead cable coating robot has the beneficial effects that the robot adopts a suspended type structure and can conduct coating while removing dust on the cable during traveling, the structure is stable, construction is convenient, carrying is convenient, the suspended type overhead cable coating robot is suitable for conducting robot coating operation on the overhead cable, and accordingly the labor intensity of cable maintenance personnel is relieved.

The invention discloses a shake monitoring system based on Brillouin distributed optical fiber sensing and belongs to the technical field of overhead cable safety monitoring. The system comprises a temperature and strain monitoring device based on a Brillouin light time domain analysis, and a plurality of shake sensors, wherein the temperature and strain monitoring device is composed of a semiconductor laser, an optical coupler, an electric light modulator, an acousto-optic modulator, a microwave frequency sweep device, a photoelectric detector, a data collection card and the like; the shake sensors are composed of rotation rods and counterweight blocks; the shake sensors are installed on the fault-prone points of a cable; and when the cable is shaken, the rotation rods connected with one end of a fiber drive the counterweight blocks to swing around the fiber, under the centrifugal effects, the rotation rods drive the surrounded fiber to generate a bending strain, a shaking state can be converted into the bending strain of the fiber and thus be detected by the Brillouin temperature and strain monitoring device. The shake monitoring system based on Brillouin distributed optical fiber sensing is suitable for on-line monitoring of the shaking state and the temperature of an overhead cable, the long-distance and distributed measuring is realized, the practicality and feasibility are high, the laying is flexible, and the cable safety monitoring is effectively realized.

The invention discloses a polyolefin semiconductive composite for organosilane crosslinked overhead cables with a rated voltage of less than or equal to 20KV, which comprises a base stock A and a superconductive parent stock B having pi bonds, wherein the weight ratio of the base stock A and the superconductive parent stock B is 100:(20-40). The base stock A comprises the following components in part by weight: 100 parts of polyolefin resin, 3 to 6 parts of first antioxygen, 1.0 to 3.0 parts of first lubricant, and 0.1 to 0.5 part of fatty acid salt. The superconductive parent stock B having pi bonds comprises the following component in part by weight: 100 parts of polyolefin resin, 1.0 to 5.0 parts of second antioxygen, 1.0 to 3.0 parts of second lubricant and 40 to 60 parts of superconductive carbon black having pi bonds. In the preparation process of the composite, the components are mixed uniformly. The composite has the advantage that the performance of products of the same purpose which need to be crosslinked can be achieved without a crosslinking process. The polyolefin semiconductive composite is particularly suitable to be used as a semiconductor shielding material for the organosilane crosslinked overhead cables with a rated voltage of 20KV or below.

The invention relates to an array type electric automobile comprising an initial electric automobile installed with a bow collector and at least one common electric automobile without a bow collector, wherein the tail of the initial electric automobile is connected with the common electric automobile through a connector, furthermore, the tail of the common electric automobile is connected with the next common electric automobile by another connector, thereby forming the array type electric automobile, wherein the initial electric automobile acquires electric power from an overhead cable through the bow collector and transmits the electric power in the array type electric automobile through the connectors so as to supply the electric power to the array type electric automobile and charge storage batteries of the electric automobile during running. The array type electric automobile can automatically form an array through the automatic connectors during running, and any electric automobile in the array can be separated from the array during running. The array type electric automobile has the advantages of improving the defect of large quality of the electric automobile, solving the problem of long charging time of the batteries and saving a great number of investment and land required for establishing charging stations.

The invention discloses an overhead cable vibration testing device and a testing method. The device comprises an overhead cable test bench, a fiber grating sensor array, a vibration table, a fiber grating CCD(Charge Coupled Device) demodulation device and a PC(Personal Computer). The surface of an overhead cable on the overhead cable test bench is adhered with the fiber grating sensor array in theaxial direction. The vibration table is located below the overhead cable test bench. The bench top is hinged to the overhead cable. A control port is connected with the PC. The optical interface of the fiber grating CCD demodulation device is connected with the fiber grating sensor array. A data transmission port is connected with the PC. According to the overhead cable vibration test device andthe test method, the vibration of the overhead cable under a real environment is simulated through a vibration table excitation, a range adjustment and the initial tension of the cable, so as to systematically analyze the vibration characteristics of the overhead cable under various complex environments; by optimizing the test method and focusing on monitoring parts where faults are susceptible tohappen, the ultimate vibration parameter on the overhead cable can be accurately grabbed; and compared with an online cable monitoring scheme, the device is convenient to adjust, a high-altitude operation is avoided, and high scientific research value and operability are achieved.

The invention relates to a carbon fiber-resin composite core for overhead cables, which consists of a carbon fiber-resin composite core layer and a protective layer wound on the core layer, wherein the protective layer is a fibrofelt and / or fiber fabric-reinforced resin material layer. Compared with the prior art, the carbon fiber-resin composite core for the overhead cables has the advantages of reducing the unit length weight of a product and improving flattening resistance.

The invention relates to a long-span two-body damper, in particular to a long-span special two-body damper which belongs to a protection tool for absorbing the vibration energy of an overhead cable and is especially suitable for complex transmission lines with long span and frequent line vibration. The long-span two-body damper comprises a cable clamp I, a cable clamp II, a pre-twisted wire, a steel strand, a middle hammer, a big hammer I and a big hammer II; a hook-shaped sleeve is respectively arranged at the upper part of the cable clamp I and the cable clamp II, a neck is respectively arranged at the head part of the cable clamp I and the cable clamp II, a through hole is respectively arranged at the lower part of the cable clamp I and the cable clamp II, the hook-shaped sleeves arranged at the upper parts of the cable clamp I and the cable clamp II are sleeved on a cable, the pre-twisted wire passes through the necks at the upper parts of the cable clamp I and the cable clamp II and are fixedly connected with the cable, and the steel strand are arranged in the through holes at the lower parts of the cable clamp I and the cable clamp II in a penetrating way and pressed and fixed; the steel stand passes through the through holes arranged at the lower parts of the cable clamp I and the cable clamp II, the middle part of the steel strand passes through the middle hammer, two ends of the steel strand respectively extend into the bag hammer I and the big hammer II, and the three hammers are connected in series by the adhesion of adhesive.

The invention discloses an overhead cable laying tractor which comprises a tractor body, traction sheaves driven by a motor and a hauling cable release device. Hooks with downward hook openings are arranged on the upper portion of the tractor body, a balance weight portion is arranged on the lower portion of the tractor body, the lower ends of hook handles of the hooks are connected with the balance weight portion, and the traction sheaves are horizontally arranged in the hook openings. The motor and the hauling cable release device are powered by a battery, a driving circuit of the motor and the hauling cable release device is connected with a wireless communication module, and the wireless communication module is in communication with a remote control unit. The motor, the hauling cable release device, the battery, the driving circuit of the motor and the hauling cable release device and the wireless communication module are respectively arranged on the tractor body. The invention further discloses a dedicated lifting tool of the overhead cable laying tractor. The primary spanning problem of a tension-free cable laying spanning device is solved through the overhead cable laying tractor in wireless control, the influence of the construction field environment on cable laying construction is greatly overcome, the difficulty and cost of the cable laying construction are greatly lowered, and construction efficiency is improved.

The present disclosure relates to a transportation system that includes a plurality of cabs that are attached to suspension frames suspended from a cable using multiple pairs of sheaves running freely on an overhead cable guide-way to allow balancing of total weight of the cab along the cable guide-way. The pairs of sheaves are assembled to articulate in a horizontal plane to allow easy traversing along curved cable guide-way sections. The transportation system also includes a plurality of smart electro-mechanical switches capable of disengaging continuity of line of motion of the cab from the cable guide-way section and diverting the cab onto other cable guide-way sections. Each of the plurality of cabs can be coupled with a plurality of propellers to provide thrust for forward movement, speed control, steering, stabilization of the cab from swinging on the suspension frame and stopping of the cab by reversing the thrust developed thereof.

The invention discloses an insulating wrapping robot system for an overhead line, and a control method for the insulating wrapping robot system. An operator installs an overhead line insulating wrapping robot on an overhead cable 1, and controls the robot to walk along the overhead cable 1. Meanwhile, an insulating paint supply device 5 controls the supply speed of insulating paint, and conveys the insulating paint to an insulating wrapping mechanism 3 through a pipe. The insulating wrapping mechanism 3 coats the overhead cable 1 with the insulating paint. A wire diameter detector 2 is used for detecting the diameter of the cable after the insulating wrapping, and a closed loop is formed, thereby guaranteeing the good insulating wrapping operation. The system is high in automation degree,is high in precision, is high in efficiency, and is high in reliability.

The invention relates to a deicing carbon-fiber-based high-low-voltage overhead cable comprising a high-voltage cable. The high-voltage cable is formed by an internal high-voltage cable wire and an insulating layer arranged on the surface; a carbon-fiber heating wire is arranged on the surface of the insulating layer of the high-voltage cable; and a plurality of carbon fibers are arranged inside the insulating layer of the carbon-fiber heating wire. According to the invention, because the carbon-fiber heating wire that can be electrified and carry out heating is arranged on the surface of the high-voltage cable and the electric energy can be converted into heat by the carbon fiber, the high-voltage cable can work normally and effectively at a severe cold area or in winter. The cable has advantages of simple structure, convenient usage, low cost, and high safety and reliability.

The insulator comprises a lower bell shaped portion, an intermediate annular waist portion and an upper saddle portion for receiving and supporting an electric transmission overhead cable. An axial blind bore opens at its lower end for receiving an upstanding support pin. The saddle portion includes a transversely-curved groove, substantially normal to the axial bore, and jutting parts on each side of the cable receiving groove and laterally protruding from the waist portion. Each jutting part has an external face which is provide with a partly annular groove, generally coaxial with the bore and of greater radius than that of the waist portion. These annular grooves are adapted to positively retain the inturned flanges of a cable retaining clasp despite an upward force or a laterally upwardly directed force exerted by the cable on the clasp. The waist portion can still be used for attaching the electric wire by a tie-wire. The clasp includes male / female joints at each of its two downwardly curved arms that automatically interlock with each other when a sufficient biasing force is applied thereon by a pneumatic tool deforming the clasp arms, drawing the registering flanges of the latter toward one another to lock the insulator to the overhead electric cable.

The invention relates to a construction method for an overhead micro-pipeline and belongs to the technical field of cable transmission. At first, a steel stranded wire is hung between two wire poles; pulleys are arranged on the steel stranded wire; a plurality of hooks are arranged between two neighboring pulleys; a cable sub-pipe is drew out from a cable sub-pipe disc by a drag rope, thus leading the cable sub-pipe to pass through the pulleys and then penetrate into the hooks on the steel stranded wire in sequence; the drag rope is pulled to lead the cable sub-pipe to be spanned between the wire poles; an air blowing method is adopted to blow a micro cable into the micro pipe of the overhead cable sub-pipe. The construction method can be used for mounting the communication cable circuits in villages and towns, fields and sharp terrains and rivers, and leads the network dilatancy advantages to be remarkable; when repairing the cable, the construction method is easy in overhauling and is quick in resuming communication.