244 results about "Strain insulator" patented technology

A strained silicon layer fabrication and a method for fabrication thereof employ a strained insulator material layer formed over a strained silicon layer in turn formed upon a strained silicon-germanium alloy material layer which is formed upon a relaxed material substrate. The strained insulator material layer provides increased fabrication options which provide for enhanced fabrication efficiency when fabricating the strained silicon layer fabrication.

A cost-effective and simple method of fabricating strained semiconductor-on-insulator (SSOI) structures which avoids epitaxial growth and subsequent wafer bonding processing steps is provided. In accordance with the present invention, a strain-memorization technique is used to create strained semiconductor regions on a SOI substrate. The transistors formed on the strained semiconductor regions have higher carrier mobility because the Si regions have been strained. The inventive method includes (i) ion implantation to create a thin amorphization layer, (ii) deposition of a high stress film on the amorphization layer, (iii) a thermal anneal to recrystallize the amorphization layer, and (iv) removal of the stress film. Because the SOI substrate was under stress during the recrystallization process, the final semiconductor layer will be under stress as well. The amount of stress and the polaity (tensile or compressive) of the stress can be controlled by the type and thickness of the stress films.

This invention generally relates to a strained silicon on insulator (SSOI) structure, and to a process for making the same. The process includes forming a thin SiO₂ layer on a strained silicon layer after it is formed on the donor wafer and before bonding to the handle wafer.

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.

The invention provides a maximum sag modeling method of a substation flexible conductor on the basis of a catenary. The method includes the steps of firstly, dividing the substation flexible conductor into a strain insulator string and a flexible bus, and determining structure parameters and material parameters; secondly, establishing an X-Y coordinate system with a hanging point of the strain insulator string as an original point, establishing the spatial coordinate equation of the strain insulator string assuming that the hanging point bearing reaction force RA and the horizontal tension T0 are known, and obtaining the horizontal projection length and the perpendicular projection length of the strain insulator string; thirdly, establishing an x-y coordinate system with an end point of the flexible bus as an original point, and obtaining the flexible bus catenary equation on the basis of a catenary theory; fourthly, converting the flexible bus from the x-y coordinate system to the X-Y coordinate system through coordinate conversion, obtaining the substation flexible conductor sag expression through the combination of the spatial coordinate equation of the strain insulator string, and then obtaining the maximum sag value of the flexible conductor. On the basis of the known structure parameters and the known material parameters, the accurate maximum sag value is directly obtained according to any design stress of a substation, the sag control is facilitated, and quite high application value is obtained.

A method of fabricating a strained semiconductor-on-insulator (SSOI) substrate in which the strained semiconductor is a thin semiconductor layer having a thickness of less than 50 nm that is located directly atop an insulator layer of a preformed silicon-on-insulator substrate is provided. Wafer bonding is not employed in forming the SSOI substrate of the present invention.

The invention relates to a transformer substation flexible circuit conductor blanking length numerical solution method based on catenary. A transformer substation flexible circuit conductor is divided into a strain insulator string and a flexible bus, structural parameters and material parameters are determined, the hitch point of the strain insulator string serves as an origin, a X-Y coordinate system is established, and an analysis model of transformer substation flexible circuit conductor blanking length is established; secondly, a sag step length dichotomy adjustment module is constructed; thirdly, a horizontal stress calculation adjustment module is established; fourthly, a hardware space coordinate calculation module is established; fifthly, a total sag calculation error adjustment module is established; finally, the calculation of modules is combined, and the blanking length of the flexible circuit conductor can be obtained. On the basis of the known structural parameters and material parameters, stress is obtained by using sag, designed sag serves as a limiting condition, by means of a numerical method, accurate sag, horizontal stress and the like are obtained, the accurate flexible circuit conductor blanking length is obtained, and the transformer substation flexible circuit conductor blanking length numerical solution method has very high application value.

The invention relates to the field of high-voltage transmission and transformation, in particular to a testing system for an insulator string vibration test. The testing system comprises insulator strings, an insulation string suspension device, two anchoring devices, an electromagnetic vibration platform, a split conductor, a force transducer and a measurement and control device, wherein the two anchoring devices are arranged on the horizontal surface through a support and connected through the split conductor, the electromagnetic vibration platform is also arranged between the two anchoring devices, and the electromagnetic vibration platform is connected with the split conductor; the suspension insulator string is connected to the split conductor between the electromagnetic vibration platform and one anchoring device, and the strain insulator string is arranged between the electromagnetic vibration platform and the other anchoring device; and the electromagnetic vibration platform and the force transducer are also connected with the measurement and control device simultaneously. The testing system disclosed by the invention can be used for finishing a vibration creep test of the suspension insulator string and the strain insulation string in the field of high-voltage transmission and transformation.

The invention provides an electrified replacement tool and method for a +/-800 kV circuit strain insulator string. The electrified replacement tool comprises a tower head end clamp, a wire end turnover board clamp, a wire end bearing support, hydraulic lead screws, mechanical lead screws and insulating pull rods. The tower head end clamp is provided with a first idler wheel and a pulley. The wire end bearing support is provided with a second idler wheel. The tower head end clamp, the wire end turnover board clamp and the wire end bearing support are arranged at the two ends of the strain insulator string to be replaced respectively and the tower head end clamp and the wire end turnover board clamp are connected through the hydraulic lead screws, the mechanical lead screws and the insulating pull rods, so that a load is transferred, the strain insulator string is replaced, and installation is more stable; the first idler wheel, the second idler wheel and the pulley can provide supporting points for a main hauling cable and a steel wire rope sleeve which are applied to the strain insulator string replacement process, so that the main hauling cable and the steel wire rope sleeve are not likely to intervene with components or tools on a transmission line and damage is reduced.

This invention generally relates to strained silicon on insulator (SSOI) structure, and to a process for making the same. The process includes a high temperature thermal anneal of a SSOI structure to improve the crystallinity of the strained silicon layer, while maintaining the strain present therein.

The invention discloses a tool set for replacing a strain insulator string of a substation framework. The tool set is provided with an insulator cradle, wherein the insulator string is placed on the insulator cradle, the two ends of the insulator cradle are provided with a movable clamp (2) and a fixed clamp (3) respectively, the two sides, arranged at one end of the fixed clamp (3), of the insulator cradle are respectively provided with a ratchet lever pulley block (4), the two ratchet lever pulley blocks (4) are connected with the movable clamp (2) through a tightening rope (5), and the two ratchet lever pulley blocks (4) drive the movable clamp (2) to move through the tightening rope (5). According to the tool set, the power outage time can be greatly shortened, the labor intensity can be reduced, and the labor efficiency is improved.

The fabrication method of a mixed substrate comprising a tensile strained silicon-on-insulator portion and a compressive strained germanium-on-insulator portion comprises a first step of producing a strained silicon-on-insulator base substrate comprising first and second tensile strained silicon zones. After the base substrate has been produced, the method comprises the successive steps of masking the first tensile strained silicon zone forming the tensile strained silicon-on-insulator portion of the substrate, of performing germanium enrichment treatment of the second tensile strained silicon zone of the base substrate until a compressive strained germanium layer is obtained forming said compressive strained germanium-on-insulator portion of the substrate, and of removing the masking.

The invention discloses a strain insulator exchange tool, which comprises a first insulated end plate, a second insulated end plate, a line blocking device, at least two clamping plates and at least two insulated pull rods, wherein the at least two insulated pull rods can stretch; a control handle for controlling stretching is arranged on each insulated pull rod; the first insulated end plate and the second insulated end plate are arranged at two ends of the insulated pull rods respectively; the first insulated end plate and the second insulated end plate and the at least two insulated pull rods form an insulated line tightening frame; the clamping plates are arranged on the at least two insulated pull rods; recessed arc gaps for supporting a strain insulator is formed in the clamping plates; connecting rods are arranged between the adjacent two clamping plates in a penetrating manner; the at least two clamping plates and the connecting rods can form a bracket capable of putting the insulator; and the line blocking device is arranged on the first insulated end plate. The strain insulator exchange tool has the characteristics that the strain insulator is exchanged in an electrified manner, and the strain insulator exchange tool is convenient to operate, high in safety and the like.

The invention relates to the technical field of power sector overhead power transmission line equipment maintenance, in particular to a tool for electrified replacement of a 500kV strain insulator string. The power transmission line 500kV strain insulator string is provided with many pieces and is high in weight, the difficulty in electrified replacement of the whole strain insulator string is high, the power failure influence range is wide, and the requirements of device state overhaul are not met. The tool comprises a front clamp, a rear clamp, pulleys, insulating pull rods, a wire tightening screw rod, a supporting bottle frame and a pre-tightening device. The front clamp and the rear clamp are a pair of oppositely arranged clamping arms and are connected through the two insulating pull rods and the wire tightening screw rod, a front clamping pulley and a rear clamping pulley are respectively fixed on the front clamp and the rear clamp, the supporting bottle frame is lifted under the insulating pull rods through the front clamping pulley and the rear clamping pulley, and the lower portion of the supporting bottle frame is hinged to the pre-tightening device. The tool is simple and reasonable in structure, high in mechanical strength, good in insulating performance, light in weight, safe and reliable to use, good in universality and convenient to operate, improves working efficiency and guarantees that power is supplied reliably.

The invention discloses a tool with a large knife clamp for lively replacing a strain insulator string on line, comprising a shell; an internal chamber is arranged in the shell; four first damping rods are fixedly arranged at the upper part of the internal chamber; a first guide rod of each first damping rod extends out of the shell so as to assemble a walking motor; an output shaft of each walking motor is provided with a grooved pulley that is arranged above the front upper part of the shell; a positioning device of the tool for replacing an insulator string is arranged at the back part of the shell; the positioning device is hinged with a connecting plate; an U-shaped wire clip is arranged on the connecting plate; a position-limited slot is arranged on the U-shaped wire clip; the U-shaped wire clip is hinged with a hydraulic cylinder; a piston rod of the hydraulic cylinder is fixedly connected with an insulating rod; the insulating rod is hinged with one end of a large knife clamp wire clip; the other end of the large knife clamp wire clip is provided with a positioning hook; three positioning screw holes are arranged on the side wall of the large knife clamp wire clip; a turnover driving motor is arranged on a turnover hinging seat; and an output shaft of the turnover driving motor is connected with a hinging shaft of the turnover hinging seat and the connecting plate.

The invention relates to an insulator zero-value detection unmanned aerial vehicle, including an unmanned aerial vehicle, a telescopic electric push rod is fixedly connected to the bottom of the unmanned aerial vehicle, the lower end of the telescopic electric push rod is fixedly connected to a support frame, and the support frame is fixedly connected to a tension insulator detection machine , position sensors are symmetrically arranged on the rotor struts of the UAV. The position sensor has a vertical folding stem. There is a drone controller on the top of the drone, and the drone controller communicates wirelessly with the detector controller and the ground remote controller. The invention replaces personnel climbing the tower, and measures the zero value of the insulator to ensure the safety of personnel. After the UAV detects the position of the insulator, it automatically aligns and falls on the insulator string. The tensile insulator testing machine can automatically walk along the double-string insulators, and can adapt to the change of the distance between the double-string insulators. It can independently quantitatively detect the resistance value of each string of insulators one by one, and automatically alarm for zero-value and low-value insulators. It can also store The detected resistance value.

The invention provides a testing apparatus for the performance test of a multiple-rotor unmanned aerial vehicle for transmission line inspection. The testing apparatus comprises a power source generator, strain towers, a straight-line tower, conducting wires, ground wires, strain insulator strings, a suspension string and a jumper wire string, wherein one ends of the ground lines are connected with the strain towers, and the other ends of the ground lines are connected with the straight-line tower; the suspension string is arranged on the straight-line tower; one ends of the conducting wires are connected with the strain towers through the strain insulator strings, and the other ends of the conducting wires are connected with the suspension string mounted on the straight-line tower; the jumper wire strings are arranged on the strain towers; the output of the power source generator is connected with the conducting wires. According to the invention, all typical defects of an actual line can be simulated on the strain towers, the straight-line tower, the conducting wired, the suspension insulator string, the strain insulator strings and the jumper wire strings, so that the visible light and infrared inspection performance test of the multiple-rotor unmanned aerial vehicle is facilitated. The power source generator can output the alternating voltage of 110-1000 kV and direct voltages of +500 kV, -500 kV, +800 kV and -800 kV, the actual line environment at all voltage classes can be stimulated, and the transmission line inspection performance of the multiple-rotor unmanned aerial vehicle cam tested.

The invention provides a strain insulator string live replacing device for a high-voltage transmission line. The strain insulator string live replacing device comprises a stringing screw, an insulation pull plate, a front clamp, a rear clamp and an insulation bracket, wherein one end of the insulation pull plate is fixedly connected with the stringing screw, the other end is fixedly connected with the front clamp, the stringing screw is arranged on the rear clamp, the insulation bracket sleeves the insulation pull plate in a sliding mode, a front clamp groove is formed in the front clamp, and a rear clamp groove is formed in the rear clamp. When the strain insulator string live replacing device is applied to operation of replacing ground potential strain double-string composite insulators (one string of the ground potential strain double-string composite insulators) in a live mode, the fault strain double-string composite insulators (one string of the fault strain double-string composite insulators) of a strain pole (tower) can be successfully replaced. Furthermore, equipotential operators are prevented from entering the electric field directly, the labor intensity is reduced, and the operation safety is improved.

The invention discloses a 35KV strain insulator string replacement device and an operation method thereof. The 35KV strain insulator string replacement device comprises a U-shaped ring clamp, a strainwire clamp, two connecting rods and screw rod assemblies in one-to-one correspondence with the connecting rods, a clamping groove is formed in the U-shaped ring clamp in a thickness direction, and the two ends of the U-shaped ring clamp are connected with first ends of the connecting rods through the screw rod assemblies correspondingly. A locking piece is detachably arranged on the clamping groove; the strain wire clamp is detachably clamped and fixed on the strainwire, and two end parts of the strain wire clamp are connected with the second ends of the connecting rods; each screw rod assembly comprises a screw, a first nut and a handle; the first end of the screw upwards penetrates through the U-shaped ring clamp, and the second end of the screw is connected with the first end of each connecting rod; the first nut is rotatably arranged on the U-shaped ring clamp and is in threaded fit with the screw; and the handle is connected with the first nut and used for driving the first nut to rotate. The device is integrally suitable for insulatorstring replacing operation between the U-shaped ring and the strain wire, operation is easy and convenient, and operation efficiency is guaranteed.

The invention provides a high-toughness polyurethane composite insulator core rod and a preparation method thereof, belonging to the field of insulator core rods for power grid transmission lines. The core rod is prepared by adopting a rapid drawing and extruding process. On the premise of ensuring the tensile strength, the toughness of the core rod is increased, so that the problems that the composite insulator core rod can be used only in an overhung manner and cannot be pedalled by constructors can be effectively solved. On the premise of ensuring practical application in terms of a mechanical property and an electric property, the core rod disclosed by the invention has the characteristics of being rapid in forming speed, high in production efficiency, good in anti-aging property and long in fatigue service life; therefore, the occurring rate of brittle fracture accidents of the insulator core rod can be reduced, and application of a composite insulator in strain insulator-string of a transmission line can be expanded.