696results about "Suspension/strain insulators" patented technology

The invention discloses a method and a two-connection board device for replacing tension insulator strings of high-voltage transmission lines with upspinning and charging. The insulator strings are loosened first by using special tools such as end wing clips and insulating pull plates; The pulleys and screw rods on the side make all the ends of the insulator strings disengage; finally, the pulleys on the ground wire brackets are used to rotate the porcelain bottle strings from the horizontal state to the vertical state, thus changing the complex operation into a relatively simple operation, which greatly shortens the time Potential working time to ensure the safe operation of the line; live replacement of the high-voltage transmission line tension insulator string double-connected plate device, including two wing cards and two screw screws, and also includes two pairs of insulating pull plates, one end of the two pairs of insulating pull plates They are respectively connected with two wings of the wing card, and the other ends are respectively connected with a lead screw, and the other ends of the two lead screws are respectively connected with the two wings of the other wing card. The structure is simple, easy to operate and low in cost.

The invention discloses an insulator string intelligent detection robotic system which is used for detection of level tension twin insulator strings. The insulator string intelligent detection robotic system comprises a robot motion system and an information processing system. The robot motion system comprises a mechanism connecting plate, a climbing device, a guide device, detection equipment, a control unit and a man-machine control terminal, wherein the guide device guides the insulator strings, is placed on two sides of the proceeding direction of the mechanism connecting plate and is matched with the twin insulator strings to be detected, the detection equipment is placed on the mechanism connecting plate, the control unit outputs a drive device connected with the climbing device to control the angle deviation between a front set of climbing arms and a rear set of climbing arms, and the man-machine control terminal is communicated with the control unit through a wireless communication unit to remotely control the climbing device. The insulator string intelligent detection robotic system is compact in structure and fast in movement speed.

The invention discloses a method and a system for determining serial and parallel connection gaps of overhead power transmission line insulators, wherein the method comprises the following steps of: determining the structures and the shapes of parallel connection gaps according to thunder impulse discharge characteristics; determining the structures and the shapes of the parallel connection gaps according to electric-field intensity distribution; determining the structures and the shapes of the parallel connection gaps according to power frequency arc motion characteristics; determining the space magnetic-field distribution of the parallel connection gaps according to the structures and the shapes of the parallel connection gaps; building an arc motion model of the parallel connection gaps by adopting an arc segmented model to simulate the motion processes of arc roots and arc columns of power frequency arcs under the actions of a space magnetic field and wind force; emulating the arc motion characteristics generated by various different structures and shapes of the connection parallel gaps by utilizing the arc motion model; and determining the structures and the shapes of the parallel connection gaps according to the influences of various different structures and shapes of the parallel connection gaps on the arc motion processes. The parallel connection gaps take account of both the advantages and the defects between the lightning outage rate of a line and the failure rate of the line.

The invention relates to a spiral-wound composite insulator bar for high-voltage transmission line in electric network and method for making same. The spiral-wound composite insulator bar has metal rings inlayed in its two ends. On the external diameter of metal rings wounded filaments, which are bound with, resinate glass fiber. The method comprises the steps of: getting some compound; melting resin; mixing melted glass fiber with resin solution and stirring with 150 turns per minute; enwinding continuously and modeling the glass fiber and epoxy resin radical solution in high temperature. The invention has the advantage of simple structure and low cost, of reducing tower's load and the effective distance from current transmission line to the earth. The spiral-wound composite insulator bar with cross wrap can meet the requirement of tensile strength, increasing bending strength.

This invention relates to a method for exchanging tension-proof insulator strands used in high voltage transmission lines and a devie, which installs a front and a back clamp for anchoring and stringing leads and a connection clamp of an anchor line at two places of connecting metals of a lead end and a horizontal end constituting a vertical pulley set for stringing the insulator strand and the connecting metal at both sides between the strand and the connecting metal, strings the pulley set synchronously and slowly to string one-side two high voltage leads, then to string the anchor line and the anchor lead, at the same time, removes the connection of the insulation strand and the connecting metal, relaxes the pulley set slowly to transfer the lead tension to the anchor line completely, therefore, when the lead is anchored, the original tensioned insulation strand is relaxed to a vertically hanging one for exchange, and the tighten, anchor of the lead and separation of the the insulator strand and the metal are finished at one run.

An oil-filled pole-mounted distribution transformer comprises a tank housing a transformer core-coil assembly immersed in cooling oil. The tank is made of a corrosion-proof composite material and a radiator is provided for cooling the oil. The radiator is external to the tank and has a hot oil inlet and a cool oil outlet located at different levels into the tank for causing a natural circulation of oil through the radiator by thermal siphoning.

This invention is concerned with the technique project that the bottom surface of single-layer umbrella cap and pin insulator of the glass or the porcelain with umbrella arris splices the composed umbrella shed made of the silicon rubber polymers and gets double-layer umbrella-hanging insulator. The structure is: the middle hole of the compound umbrella shed extends upwards by drum shape, the top part of the drum shape and the umbrella cap bottom surface of the hanging insulator splices with each other. The invention can improve the anti fouling of the insulator without reducing its performance in un / installation.

The invention relates to a configuration method of a high-voltage transmission line insulator, belonging to the technical field of transmission line insulation design of a power system. The method comprises the steps as follows: firstly, a mapping table is established according to the existing experience or the corresponding standards, thereby estimating the string length of the insulator to be selected, wherein the insulator is needed in line design; the insulator to be configured is chosen according to the string length of the insulator in the mapping table and mechanical requirements; for a specific insulator to be configured, the salt deposit density of the operated insulator is calculated and the pollution flashover voltage is acquired by the data of the pollution test; in consideration of revisions of a plurality of affection factors, the withstand voltage of the insulator to be configured is calculated and the string length of the insulator is determined according to the target voltage of the line to be designed; and finally, the string length and the string length threshold in the mapping table are calibrated, thereby determining final insulation configuration result. The method realizes two functions of insulator type selecting and size configuration and directly uses the results of the pollution test to calculate, so as to ensure the precision and reliability of insulator configuration to meet the requirements on line pollution outer insulation design.

The invention discloses an integrated overhung composite insulator string and a method for printing a composite insulator string connecting metal tool by using 3D. The method comprises the following steps of: firstly, generating a three-dimensional CAD (Computer-Aided Design) model of a part in a computer, and printing the three-dimensional CAD model by utilizing a 3D molten-drop printing machine; then slicing up and layering the model according to a certain thickness, converting the three-dimensional information of the part into a series of two-dimensional profile information; melting down metal by using a crucible, and enabling the molten metal to flow out of a nozzle to form molten drops; then accumulating the molten drops layers by layer according to the two-dimensional profile information under the control of the computer so as to obtain a three-dimensional entity part or a part in similar shape. After the method is adopted, a ball-socket series of metal tools is shaped for once directly through the molten-drop 3D printing machine, the connecting cooperation is more reliable and more stable, secondary installation is unnecessary, and the production efficiency is improved; meanwhile, the efficiency of the site construction is provided, and a great influence to the construction of a high-voltage overhead power line is generated.

The invention relates to a high-voltage and ultrahigh-voltage dry-type air-cored current limiting reactor. A main reactor body (1) comprises a coil (10), a rain hat (20) and a combined lazy arm (11), wherein the main reactor body (1) is supported by an insulated support post (30); electric field shielding parts (40) are arranged at the upper part and the bottom part of the main reactor body (1); and each electric field shielding part (40) comprises an upper main reactor body corona ring (41) and a lower main reactor body corona ring (42) to solve the problem of power generation of the main reactor body and accessories at high voltage. The insulated support post (30) comprises a support post insulator (31) and a metal bracket (33); and the metal bracket (33) is connected with a support post insulator (31) through an epoxy flat plate (73) and insulated bolts. According to the high-voltage and ultrahigh-voltage dry-type air-cored current limiting reactor, the requirements on the ground insulation level and support are met; leakage flux is reduced; the requirements on the temperature of accessories are reduced; and the reactor provided by the invention can meet the requirements of power grids of 220kV and 500kV on voltage and current distribution, insulation level and short-time current.

An elongate high voltage insulator is formed of a rod or tube of insulating material, with a pair of electrodes spaced apart longitudinally thereof. At least part, and preferably the whole of the outer surface of the insulating material is covered by a layer of material including a particulate filler of varistor powder in a matrix having a switching electrical stress-controlling characteristic that is in electrical contact with each of the electrodes. The insulator core may be made of porcelain, and the stress-controlling material may be zinc oxide.

An electrically insulating cross-arm for a tower for high-voltage power networks. The cross-arm includes an insulating structural member for attachment to the tower body and to support a conductor cable. The insulating structural member comprises a solid rigid spine extending along a long axis having cross sectional profile, normal to the long axis, having a second moment of area of its cross sectional profile about every axis normal to the long axis and dissecting its centroid has a value of A2 / 2π or more, where A is the area of the cross sectional profile. The structural member provides resistance to bending and compressive buckling and allows conductors to be safely supported at reduced tower height. T and Y shaped cross sections provide water run-off and inhibition of organic growth. The structural members are also generally useful as insulator members in high voltage power networks.

A process for preparing the insulating body of multi-layer umbrella type toughened glass insulator includes preparing the integrated head part and one umbrella disc, preparing each umbrlle disc, and adhering them together with the electrically insulating adhesive.

The invention discloses a laminated toughened glass insulator and a preparation method thereof. The insulator is formed with soda-lime glass or ceramic white porcelain glass as the center and externally coated with aluminosilicate glass or low borosilicate glass. The section structure comprises a first and a third layer of aluminosilicate glass or low borosilicate glass; a middle layer of soda-lime glass or ceramic white porcelain glass. A double layer melting furnace is adopted to melt glass raw materials and form glass material base and then a laminated toughened glass insulator is obtained which has a transparent external layer and a blue middle after forming and annealing. The insulator is characterized by more resistance to external impact, no easy occurrence of unfilled corner, fracture and other phenomenon, no generation of cracking, resistance to temperature difference of over 150 DEG C, hard and fine surface without pores, easy self-cleaning, high strength, is bright (like a new one) after long time of outdoor use and has important significance for ensuring the normal operation of electrical power systems.

The invention discloses a multi-layer high gradient insulator for a high-voltage pulse power supply and a manufacturing method thereof. The multi-layer high gradient insulator is characterized in that thin conductive layers are regularly embedded in an insulator body made of an insulated material, the side surface of the insulator, which is in a certain depth, is formed by an insulated material layer and a conductive material layer, and the interior of the insulator is formed by a single insulated material. According to the invention, a conductive array is embedded in the side surface of the insulator body, the secondary electron emitting characteristic of the surface of the insulator and the surface load charge accumulation are restrained, the vacuum surface flashover characteristic of the insulator body is improved, the surface impact voltage of the insulator body is improved, the problem that the insulated material layer is not matched with the mechanical and thermal performance of the conductive material layer is solved, and the process difficulty and cost for manufacturing the multi-layer high gradient insulator are remarkably lowered.

The invention relates to a composite flexible insulator and a manufacturing method and application thereof. The composite flexible insulator comprises a flexible shaft, a shed, a grading ring and a connecting interface, wherein the flexible shaft comprises a core and a protecting sleeve; the protecting sleeve coats the core; the shed is uniformly distributed outside the protecting sleeve; and the two ends of the core are respectively fixed with the grading ring and the connecting interface. The manufacturing method comprises the following steps of: (1) forming the flexible core; (2) refining a rubber matrix for the shed and the protecting sleeve; (3) manufacturing the flexible shaft and the shed; and (4) arranging the connecting interface and the grading ring. The composite flexible insulator can be used for high voltage overhead power transmission lines, and serves as a dead end insulator, a V string insulator and a spacing rod for preventing conductors from galloping after being connected with external conductors and supports.

The invention discloses a method for preparation of composite insulator solid mandril, including: leading-out setting quantity of epoxy glass fiber to a dipping tank for dipping, the epoxy glass fiber after dipping entering into a mould pressing machine, arranging in a preheat die coated with release agent; the mould pressing machine further heating the die, simultaneously applying the identical pressure to the top and bottom of the die, after heating the die at 80 DEG C - 180 DEG C for 4 - 8 hours, maintaining pressure at 180 DEG C - 120 DEG C for 1 to 3 hours to complete the mandril by one time molding; after the one time molding of the mandril, stating the mould pressing machine, separating the dies, drawing the molding epoxy glass fiber from the die, and performing second curing by microwave heating. To ensure complete curing in the internal of the mandrel, intermittent pultrusion technology is combined with the flat-plate heating molding technology, to realize the production of large-diameter epoxy glass fiber composite insulator mandril.

Core rod of compound hollow insulator is composed of composite tube 1, composite tube 3, and some shape bars 2 in composite material arranged in circumference between tube 1, and tube 3. Filler 4 in composite material is filled in interspaces among shape bars. Fillers 4 are made from rosin based composite material through pultrude combined circumferential wrapping, laying down or rolling techniques. Shape bars 2 are prepared through continuous fiber pultrude, or pull wrapping or hand pasting. Composite tube 1 and composite tube 3 are prepared through wrapping fiber yarn or rolling glass fiber cloth, or combining both manners. Features are: reasonable structure, excellent electric specification, reduced weight of core rod of compound hollow insulator, and ensuring requirement of mechanical properties so as to put materials to good use.

The invention discloses an anti-icing coating for an insulator. The anti-icing coating consists of a high-resistivity coating and a low-resistivity coating. The high-resistivity coating consists of silicon rubber and carbon black, wherein the weight percentage content of the carbon black is lower than 1 percent; and the high-resistivity coating is coated at the outermost edge of the skirt of the insulator. The low-resistivity coating consists of silicon rubber and carbon black, wherein the weight percentage content of the carbon black is between 10 percent and 30 percent; and the low-resistivity coating is coated on the surface of the insulator except the outermost edge. Two coatings with high resistivity and low resistivity are prepared respectively by adding carbon black into the silicon rubber according to different proportions; the upper surface and the lower surface of the skirt of the insulator are coated with the low-resistivity coating; and the outermost edge of the skirt of the insulator is coated with the high-resistivity coating. By adopting the high-resistivity coating, ice is prevented from growing at the skirt edge by adopting the high-resistivity coating, the flashover voltage is prevented from being lowered by ice bridging, the working stability of the insulator is enhanced, and safe and reliable power transmission is ensured.

A universal clamp assembly having a support fitting with arms and a threaded bolt mounted to the arms allowing rotation about a longitudinal axis of the bolt. The bolt is retained against axial movement along the longitudinal axis. A clamp member is rotatably mounted on the bolt between the arms for rotation of the clamp member relative to the support fitting about the longitudinal axis. The clamp member is restrained against axial movement relative to the support fitting and the bolt along the longitudinal axis. The clamp includes a guide opening through which the bolt extends. A keeper is threadedly mounted on the bolt and partially received in the guide opening. The keeper slides in the guide opening along the longitudinal axis and is restrained against rotation about the longitudinal axis of the bolt relative to the clamp member. The keeper is rotatable about the longitudinal axis concurrently with the clamp member.

The invention relates to a disk-shaped suspension insulator multi work positions pipelining gluing machine. An intermittent horizontal rotary work table is arranged on a frame, and 3 to 5 gluing components support seats and elastic brackets corresponding to the annular pipelining work positions are equally arranged on the work table. A vibration transmission rob is vertically fixed at the center of an upper faceplate of the elastic bracket. An upper platform is fixed above the rotary work table. A driving oil cylinder, an elastic touch pressing head which is arranged at a lower end of a piston rod of the drying oil cylinder and a movable fastening device formed by positioning nuts are respectively arranged on the A, B and C work positions on the upper platform. A vibrator provided with a vibration transmission seat is respectively arranged on the A, B and C work positions on the machine frame seat. The invention has compact and reasonable structure, and the positioning of gluing is accurate and the coaxiality is better and the production efficiency is high. Meanwhile, two times of vibration with different frequencies and swings are adopted to dramatically enhance gluing strength. And an automatically cleaning device not only can further enhance production efficiency, but also can improve the sanitary condition of production environment.

The invention relates to an anti-ice-flashover composite insulator with a lightning protection function, which comprises a mandril (2), and a casing (9) thereof is provided with a first composite umbrella cover (3). The mandril (2) in a cylinder is sleeved with stacked metal oxide valve plates (8) and a spring (7). The lower end of the mandril (2) is provided with a second composite umbrella cover (4). The upper end of the second composite umbrella cover (4) is sleeved with a first strap (11), and the lower end thereof is provided with a second strap (12). A bowl-shaped metal cap (1) and a ball-shaped metal cap (5) are respectively covered on both ends of the mandril (2). In freezing days, the insulator can prevent ice covering and blocking arc serial connection, and greatly reduces the possibility of line trip. The invention has the beneficial effects that: (1) the bearing load for the whole mandril to suspend a transmission conductor is higher; (2) a lightning protection section bears lower voltage; (3) the metal oxide valve plates contact tightly; (4) the lines prevent lightning; and (5) an umbrella skirt string structure insulating outer cover which comprises staggered and laminated large and small umbrella skirts can prevent ice flashover in freezing weather.

The invention discloses a suspension insulator made of silicone rubber. Compared with the prior art, the provided suspension insulator is made of silicone rubber; because the suspension insulator haslow density, the weight of the suspension insulator is largely reduced relative to a ceramic suspension insulator or a glass suspension insulator; the load of an iron tower can be reduced and the suspension insulator can be conveniently disassembled and installed. The provided suspension insulator is especially suitable for the field of power transmission.

An umbrella type structure of composite insulator used in high-altitude ice-coated area is composed of at least two umbrella skirts as large, middle and small diameters. The invention is characterized in that the distance between umbrella skirts is 35-40mm, the distance between large umbrella skirts is 170-220mm, the diameter of large umbrella skirt is 170-220mm, the diameter ratio between large and small umbrella skirts is 1.8-2.1, the diameter ratio between large and small umbrella skirts is 1.3-1.5, the pitch angles of upper surfaces of large, middle and small umbrella skirts are 8-9 degrees, the pitch angles of lower surfaces of large, middle and small umbrella skirts are 0 degrees. The invention can be used for the external insulation engagement of power transmission system more than 110KV at high-altitude ice-coated area. The invention has reasonable structure, high ice flash voltage, low local field strength, and wide application, which can resist ice slush bridge umbrella skirt.

The invention discloses a tension string of composite insulators for overhead transmission lines, which comprises two composite insulators (1), and is characterized in that one end of each composite insulator (1) is provided with a ball-and-socket structure (2), and the other end is provided with The ball head structure (3), the ball socket structure (2) is connected to the grounding end fittings string, the ball head structure (3) is connected to the high voltage end fittings string, and the grounding end fittings string or the high voltage end fittings string are provided with at least two inner arc U-shaped The ring (12) and the inner arc U-shaped ring (12) are connected ring-to-ring. The invention enables the string of fittings to rotate axially at a certain angle by changing the connection mode between the fittings, thereby avoiding the axial torsion of the composite insulator. Destroy the connection strength between the mandrel and the end fittings.