331 results about "Ultra high voltage" patented technology

The invention provides a carbon ceramic resistor and a preparation method thereof, and relates to the technical field of special material production of power systems and electrical equipment. The preparation method comprises the steps that carbon-containing electric conductor raw materials are mixed to obtain a first mixed raw material, and the carbon-containing electric conductor raw materials comprise, by mass, 15 parts of gluconic acid, 10 parts of aluminum oxide and 55 parts of deionized water; performing hydrothermal reaction on the first mixed raw material to obtain a carbon-containing conductor precursor; the carbon-containing conductor precursor is carbonized in a protective atmosphere, a carbon-containing conductor of a core-shell structure is obtained, and the carbon-containing conductor takes aluminum oxide as an inner core and takes a conductive carbon material formed by gluconic acid as a conductive outer shell; mixing the carbon-containing electric conductor with the core-shell structure with a carbon ceramic matrix raw material to obtain a resistor blank; and sintering the resistor blank to obtain the carbon ceramic resistor. The uniformity, the stability and the reliability of the carbon ceramic resistor are improved, so that the carbon ceramic resistor can better meet the application requirements of ultrahigh-voltage and extra-high-voltage alternating-current power transmission systems.

The invention relates to the technical field of material detection, in particular to a cross-linked polyethylene insulation material impurity full-detection device and system for a high-voltage cable and application, the detection device carries out detection based on single-row continuous flowing insulation material particles, and the detection device comprises a near infrared spectrum imaging unit, a visible light imaging unit and an image processor, and identifying black spot impurities and heterochromatic particles. The full-detection system provides a detection channel for installing full-detection equipment and comprises a current limiting pipe body and a camera obscura structure, and reflection spectrum and surface color information are collected in the camera obscura structure; the full-inspection system further comprises a buffer stock bin, a finished product stock bin, a pneumatic sorting module, a cyclone separator, a cooling fluidized bed and a metal separator. Impurity identification reliability is guaranteed through double optical detection, full-process online detection of insulation material impurities can be achieved, limitation of traditional sampling detection is broken through, full-detection coverage of insulation material particles is achieved, the impurity missing detection risk is eliminated, and the strict requirement of an ultrahigh-voltage cable for insulation material cleanliness is fundamentally met.

The method comprises the following steps: uniformly mixing iron phosphate, lithium carbonate, a carbon source and an additive, carrying out grinding and spray-drying to obtain a spray-dried material, carrying out primary sintering on the spray-dried material to obtain a primary sintered product, uniformly mixing the primary sintered material with a lithium source, the carbon source and the additive, transferring the mixture into a furnace, and carrying out secondary sintering to obtain the high-performance lithium iron phosphate cathode material. And carrying out secondary burning in a protective atmosphere, discharging from the furnace after the secondary burning is finished, and carrying out air jet pulverization to obtain a finished product of secondary burning lithium iron phosphate. The ultra-high-pressure solid lithium iron phosphate positive electrode material is prepared by a two-mixing two-firing method, and lithium and carbon are supplemented by a lithium element, a carbon source and an additive; the preparation method has the advantages that the particle size can be inhibited, the effects of repairing a carbon layer, improving the particle morphology, increasing the Li < + > diffusion coefficient and the like are achieved by combining secondary sintering, and indexes such as capacity increasing, voltage efficiency improving, resistivity reducing, iron dissolution and the like can be achieved while the material compaction is improved.

The invention relates to the technical field of transformer substation inspection path planning, and discloses an ultrahigh-voltage transformer substation inspection path planning method and system. According to the method, multi-dimensional monitoring data such as equipment operation state data, environmental parameter data and equipment historical maintenance data of the ultra-high voltage transformer substation are collected, the data are dynamically evaluated, and the equipment operation health degree, the environmental influence factor value and the equipment maintenance urgency degree are generated. And constructing a three-dimensional evaluation space based on the three key indexes, and performing adaptive grid division in the three-dimensional evaluation space. And identifying an optimal routing inspection interval in the divided grids through a density clustering algorithm, generating a routing inspection path sequence according to the optimal routing inspection interval, smoothing the routing inspection path sequence by adopting a path optimization algorithm, and outputting a final routing inspection path scheme. According to the method, multiple factors are comprehensively considered, the scientificity and efficiency of transformer substation inspection path planning are effectively improved, potential problems of equipment can be found in time, and stable operation of the transformer substation is guaranteed.

The invention belongs to the technical field of superconductive phase modifier stators, and relates to a power grid direct connection type ultrahigh voltage superconductive phase modifier stator cable winding fixing method, which is characterized in that a cable is fixed in a groove in segmented non-magnetic teeth, and the end part of the cable is bound and fixed; and the problem of local deformation of the cable winding caused by end electromagnetic stress and vibration can be avoided.

The invention relates to a dielectric elastomer-piezoelectric composite multi-source energy collection device for a non-intrusive electric field sensor, and belongs to the technical field of power system self-powered sensors. The device comprises a base, a dielectric elastomer unit, a piezoelectric cantilever beam, a mass block and a rectification energy storage circuit. The dielectric elastomer deforms under the action of an alternating electric field, the piezoelectric cantilever beam is driven through coupling to generate mechanical vibration, and the piezoelectric layer further converts mechanical energy into electric energy to be output. The resonant frequency of the system is adjusted by setting the mass block, so that the resonant frequency is matched with the external electric field frequency or the environment vibration frequency, and the energy conversion efficiency is optimized. The device can collect external electric field energy in a non-intrusive mode and provide a stable power supply required by a low-power-consumption sensor. The device is compact in structure, high in sensitivity and suitable for electric field monitoring in scenes such as ultrahigh-voltage power transmission lines and transformer substations, and provides reliable energy support for self-powered sensors of power equipment.

The invention discloses a self-repairing anticorrosive paint, a preparation method thereof and an anticorrosive application on the surface of a hardware fitting, the self-repairing anticorrosive paint is composed of a two-component system of a matrix component and a functional component, a composite conductive network formed by multi-walled carbon nanotubes is introduced, ion migration and electric field distortion under a strong electric field can be inhibited, and the electrochemical corrosion rate is reduced; the photo-thermal response type microcapsule can realize near-infrared light triggered in-situ repair of micron-sized cracks, and corrosion medium permeation is avoided; a gradient interface strengthening structure and a nano reinforced phase formed by the nano silicon dioxide can improve the cracking resistance and wear resistance of the coating in a wide temperature range (-50 DEG C to 150 DEG C) and under mechanical vibration, the self-repairing anticorrosive coating is extremely low in corrosion rate in a strong electric field environment, has wide temperature range cracking resistance and micro-crack in-situ repairing performance, and can be applied to the field of high-temperature-range self-repairing anticorrosive coating. And the problems of coating interface stripping, lack of self-repairing capability, high maintenance cost and the like of key metal materials of the ultrahigh-voltage power transmission and transformation equipment in complex climatic environments such as high humidity and high salt are solved.

The invention provides a preparation method and application of an ultra-high-pressure solid-state lithium iron phosphate material, and belongs to the field of lithium batteries. The method comprises the following steps: respectively mixing iron phosphate with a high iron-phosphorus ratio and iron phosphate with a low iron-phosphorus ratio with a lithium source, an additive and a carbon source, carrying out sanding, spray granulation and sintering treatment to obtain a precursor A and a precursor B, and carrying out secondary sintering on the precursor B to obtain a precursor C; and finally, mixing the precursor A and the precursor C in proportion, and crushing to obtain the ultra-high pressure solid type lithium iron phosphate positive electrode material. According to the invention, the coordination of high compaction density and excellent electrochemical performance of the lithium iron phosphate positive electrode material is realized by constructing a grading structure of a large-particle skeleton and small-particle filling and optimizing a crystal structure by combining a two-step sintering process, and the lithium iron phosphate positive electrode material is suitable for the field of high-capacity lithium ion batteries.

The invention discloses a driving power supply fault switching method and system, particularly relates to the technical field of power system relay protection, and is used for solving the problem that an existing relay power supply switching system causes misoperation due to common-mode interference caused by ground fault transient potential gradient. An earth screen potential gradient is collected in real time, a control cable orthogonal electric field component is measured synchronously, an electric field fiber bundle structure is reconstructed based on topology invariant distribution of a cable surface topology sequence substance, and a common-mode interference coupling coefficient is generated according to a space vector relation between an earth screen gradient direction and a reconstructed electric field; the coupling coefficient is converted into electrostrictive strain through the inverse piezoelectric effect, then a dynamic compensation voltage instruction is generated, finally, the compensation instruction is superposed to a power supply control loop to drive a standby power supply to be switched, the coupling influence of earth screen transient interference on a relay is eliminated from the physical mechanism level, the problem of misoperation is fundamentally solved, and the reliability of the relay is improved. And the reliability of power supply switching of the ultrahigh-voltage power transmission and transformation system is

The invention relates to the field of power cable materials, in particular to an ultrahigh-voltage cable insulating material, a preparation method thereof and a cable. The ultrahigh-voltage cable insulating material is prepared from the following raw materials in parts by mass: 80 to 100 parts of polyethylene, 1 to 5 parts of a cross-linking agent, 0.5 to 1 part of a compatilizer and 0.1 to 1 part of an organic molecular semiconductor. According to the ultrahigh-voltage cable insulating material, the organic molecule semiconductor with high electron affinity is introduced into the polyethylene matrix, and free electrons are attracted and fixed through strong static electricity of the organic molecule semiconductor, so that injection, migration and accumulation processes of charges in the cable insulating material are blocked; the problem of space charge accumulation of a cable insulating material in a high-voltage environment is solved from the source, and the insulativity and the long-term operation reliability of the cable insulating material are effectively improved.

The invention discloses an ultra-high voltage nuclear phase correction method, device and equipment based on multi-source data fusion and a medium, and relates to the technical field of power grids, and the method comprises the steps: firstly obtaining the t-th round of multi-source data and a real phase value of ultra-high voltage equipment; and inputting the multi-source data into the pre-trained neural network model to generate a correction coefficient, correcting a phase value by combining the correction coefficient and the original phase value, and calculating a phase error with a real phase value. If the phase error exceeds the error threshold value and the adjustment frequency does not exceed the adjustment frequency threshold value, adjusting the gain of the acquisition equipment amplifier according to the electric field intensity, and re-acquiring the (t + 1) th round of multi-source data; and outputting a corrected phase value if the phase error reaches the standard. In addition, the correction phase value needs to be rechecked by two persons, and when the deviation exceeds a second threshold value, intelligent contract alarm and frozen combination ring operation are triggered; time deviation and a second phase error can be obtained through the current temperature, and secondary correction is carried out on the original phase value. According to the method, the nuclear phase precision and safety of the ultrahigh-voltage equipment can be improved.

The invention discloses an ultra / extra-high voltage alternating current line degraded insulator live detection and intelligent evaluation system, which comprises a data acquisition module, which adopts a high-precision electric field sensor array with electromagnetic protection to carry out multi-angle electric field live scanning, sampling and detection on different types of insulator strings; the feature extraction module is used for establishing an electric field distribution multi-dimensional feature library including an electric field gradient matrix, an electric field entropy value, electric field spectral density and electric field polarization features according to the collected data features, and extracting abnormal features through wavelet transform and an outlier detection algorithm; and the intelligent evaluation module is used for constructing an insulator multi-physics field coupling model, establishing a mapping relation between electric field characteristics and degradation types, positions and degrees through bidirectional calibration of measured data and model prediction data, and outputting an evaluation result. The intelligent evaluation system can efficiently and accurately identify the degradation state of the insulator, reduces the operation and maintenance cost of a power grid, and guarantees the safe and stable operation of a power system.

The invention discloses a power transmission line ice resistance improving and transforming method based on four-split conductor transformation and double-split. The method comprises the steps that a line mechanical structure and electrical parameters needed in the power transmission line transforming process are collected; preliminarily selecting a modified double split conductor section according to an economic current density method; s2, verifying the selected wire cross section based on a heating condition, and if the heating verification is not passed, entering the step S2 again, and selecting a larger cross section; the diameter of the selected wire is verified based on the corona condition, and if the corona verification-free condition is not met, the corresponding corona inception field intensity Es is calculated to serve as the constraint condition in the step S5; based on mechanical and electrical safety constraint conditions, optimized design is carried out on the split spacing and the phase spacing of the remodeled wire; and S6, simulation verification of the ice resistance improvement effect after modification is carried out, and a new thought is provided for ultrahigh-voltage power transmission line wires in medium and heavy ice areas and structural form selection thereof through extraction of the lowest surface electric fields of different double-bundle conductor structural forms.

This application relates to the field of insulated switch application technology, and particularly to a method and apparatus for characterizing partial discharge features in ultra-high voltage direct current (UHVDC) GIS. The method includes: generating a partial discharge pulse sequence based on the light signals generated by electroluminescence and gas ionization emission in the UHVDC gas-insulated switchgear; generating a spectrum of at least one parameter pair based on the amplitude and corresponding time of the partial discharge pulses; and generating a feature fingerprint map of at least one parameter pair based on the spectrum. The method also involves extracting at least one statistical feature from the kernel density sequence of the at least one parameter pair based on the feature fingerprint map, and generating a characterization result of the partial discharge feature based on the at least one statistical feature. This solves the problem that partial discharge detection is easily affected by electromagnetic interference, mechanical vibration, and environmental noise, making it difficult to effectively extract and accurately identify the actual partial discharge signal, thus affecting the accuracy and reliability of the detection results.

The invention provides a semi-conductive shielding material, a preparation method and application thereof and a high-voltage alternating-current cable, and belongs to the technical field of ultra-high-voltage cable semi-conductive shielding materials. The semiconductive shielding material is prepared from the following raw materials in parts by mass: 30 to 35 parts of conductive filler, 57.5 to 71 parts of silane coupling agent modified matrix resin, 1 to 2 parts of cross-linking agent, 1 to 2 parts of lubricant and 0.5 to 2 parts of phenolic acid antioxidant, wherein the silane coupling agent modified matrix resin is prepared from the following raw materials in parts by mass: 54 to 65 parts of matrix resin, 0.5 to 1 part of initiating auxiliary agent and 3 to 5 parts of silane coupling agent. The conductive filler, the silane coupling agent modified matrix resin, the cross-linking agent, the lubricant and the phenolic acid antioxidant are adopted as the raw materials of the semiconductive shielding material, so that the thermal aging resistance, the electrical property and the mechanical property of the semiconductive shielding material can be remarkably improved.

The invention discloses a cable curvature radius detection device for ultrahigh-voltage power cable insulation material test, and relates to the technical field of cable detection, the cable curvature radius detection device comprises a bottom plate and a cable main body, the upper side of the bottom plate is provided with a limiting unit, the upper side of the bottom plate is fixedly connected with a guide ring, the outer side of the guide ring is slidably connected with a guide block I, and the guide block I is fixedly connected with the cable main body. A mounting block is fixedly connected to the front side of the first guide block, a laser measuring instrument is fixedly connected to the front side of the mounting block, the limiting unit comprises a fixing cylinder, the fixing cylinder is fixedly connected to the upper side of the bottom plate, and a plurality of moving plates are arranged on the outer side of the fixing cylinder. According to the cable curvature radius detection device, the bottom plate, the fixed cylinder, the movable plate, the arc-shaped plates, the inclined plate, the lifting disc and the hydraulic cylinder are arranged, the hydraulic cylinder can conveniently control the lifting disc to descend and control the arc-shaped plates to rapidly bend a cable, operation is simple, and curvature radius detection of the cable is facilitated through the guide ring, the first guide block and the laser measuring instrument.

This invention discloses an ultra-high voltage cable with an aluminum-pressed sheath, relating to the field of cable technology. It includes an outer sheath, inside which a cable core is installed. An insulating shielding sleeve is fitted over the outer wall of the cable core. An inner nesting sleeve is fitted over the outer side of the insulating shielding sleeve. A reinforcing strip is symmetrically wound around the outer wall of the inner nesting sleeve. Several arc pads are installed at equal angles along the circumferential direction on the outer side of the reinforcing strip. A support sleeve is fitted over the outer side of each arc pad. This invention effectively integrates spiral limiting, multi-dimensional gradient buffering, flexible protection, and rigid support. It not only forms multiple radial and axial stress relief networks, achieving multi-level stress dispersion and efficient buffering of mechanical stress, providing reliable flexibility for ultra-high voltage cables, but also forms a radially dominant, multi-axially auxiliary heat conduction network while ensuring mechanical strength, effectively improving the cable's heat dissipation capacity and simultaneously meeting the cable's requirements for mechanical strength and heat dissipation performance.

This invention relates to a single-end distributed parameter fault location method for ultra-high voltage (UHV) transmission lines, comprising: acquiring the line parameters of the UHV transmission line under test and determining whether a fault has occurred; acquiring the three-line voltage vector and three-phase current vector of the faulty end of the transmission line, establishing a distributed parameter model of the transmission line, and dividing the distributed parameter model of the transmission line into a fault-side segment model, a fault-opposite-side segment model, and a fault branch model according to the fault region; employing a single-end phasor domain centralized parameter fault location method to solve for the initial values ​​of the fault location and fault resistance; based on the fault-opposite-side segment model, constructing a fault location equation with the fault location and fault resistance as variables, and iteratively solving for the fault location and fault resistance as an optimization problem, as the fault location result. Compared with the prior art, this invention significantly improves the fault location accuracy of UHV long-distance transmission lines.

A distributed ice melting device topological structure suitable for an ultra-high voltage power transmission line comprises a plurality of ice melting sub-modules arranged in a distributed mode, and each ice melting sub-module comprises a single-turn coupling transformer, a metal oxide voltage limiter, a bypass switch, a filter, an H-bridge current converter and a direct-current capacitor. A primary winding of the single-turn coupling transformer is directly formed by split sub-conductors of the ultra-high voltage power transmission line, and a secondary winding of the single-turn coupling transformer is electrically connected with other parts of the ice melting sub-modules, so that the ice melting sub-modules are connected in series on the split sub-conductors of the power transmission line in a distributed manner; the H-bridge current converter is electrically connected with the direct-current capacitor, and the direct-current capacitor provides smooth direct-current voltage for the H-bridge current converter; the filter is connected in series with the H-bridge current converter, the bypass switch is connected in parallel with the H-bridge current converter, and the metal oxide voltage limiter is connected in parallel with the line side output end of the ice melting sub-module; and the ice melting sub-modules adjust the current of the corresponding split sub-conductors by changing the equivalent impedance of the ice melting sub-modules, so that accurate ice melting of the ice-coated split sub-conductors is realized, and the overall current and the transmission power of the power transmission line are kept unchanged. The technical problem to be solved by the invention is to provide the distributed ice melting device topological structure suitable for the ultra-high voltage power transmission line, and the technical problem that the existing ice melting technology cannot realize accurate ice melting and non-power-cut operation on an ice coating section on the ultra-high voltage power transmission line is solved. And normal transmission of the line is affected due to overlarge capacity demand, line overcurrent or incapability of three-phase synchronous ice melting.

The embodiment of the invention discloses a sulfur hexafluoride online purification monitoring device, and relates to the technical field of high-voltage and ultrahigh-voltage electrics. The sulfur hexafluoride online purification monitoring device comprises a tank body, a selective permeable membrane and a purification monitoring assembly, the tank body is provided with an inner cavity, the selective permeable membrane is installed in the inner cavity and divides the inner cavity into a high-pressure side chamber and a low-pressure side chamber, the high-pressure side chamber is communicated with sulfur hexafluoride high-voltage electrical equipment, and the low-pressure side chamber is communicated with the purification monitoring assembly; sulfur hexafluoride in the sulfur hexafluoride high-voltage electrical equipment enters the high-voltage side cavity, the selective permeable membrane allows decomposition products of the sulfur hexafluoride and small air molecules to permeate into the low-voltage side cavity, the purification monitoring assembly monitors and purifies gas in the low-voltage side cavity and then discharges the gas, and the sulfur hexafluoride high-voltage electrical equipment does not need to be powered off. Therefore, the continuous operation in the operation state can be realized.

This invention relates to the field of polyethylene insulation materials and discloses a polyethylene cable insulation material and its preparation method. The method includes: (1) blending an antioxidant, an anti-scorching agent, and low-density polyethylene by gravity metering, extruding, and then water-cooling and pelletizing to obtain granules; (2) preheating the granules by gravity metering and then sequentially mixing and impregnating them with a peroxide; the anti-scorching agent is 1,1-diphenylethylene and / or 2,4-diphenyl-4-methyl-1-pentene. The method provided by this invention can prepare a polyethylene cable insulation material with anti-scorching properties and high cleanliness. Furthermore, the performance of ultra-high voltage polyethylene cables above 110KV produced using the polyethylene cable insulation material provided by this invention is stable, and the scorching time is longer. Therefore, the polyethylene cable insulation material provided by this invention is suitable for the production of long-cycle cables.

This invention discloses a method for preparing ultra-high voltage converter transformer oil. The method uses the full fraction of high-temperature and medium-low temperature coal tar as raw material, employing a combined suspended-bed hydrogenation process. Through the same raw material and a single set of industrial equipment, continuous production of transformer oil base oil and aromatic oil is achieved. After the final addition of an antioxidant, the resulting transformer oil exhibits excellent anti-gas evolution properties, and its low-temperature performance and antioxidant properties are significantly superior to commercially available transformer oils. Furthermore, the method demonstrates strong adaptability to raw materials, flexible operation, and online catalyst addition in small quantities, resulting in improved overall performance of the prepared ultra-high voltage converter transformer oil. This invention provides an economical processing method for coal tar, which has relatively low byproduct utilization, and also develops a new raw material for the production of ultra-high voltage converter transformer oil.

The invention discloses an ultrahigh-voltage constant-voltage clamping transmitting system for an electrical source transient electromagnetic method, and belongs to the technical field of ultrahigh-voltage constant-voltage clamping. Comprising a main power supply, an auxiliary power supply, a clamping capacitor, a main switch bridge circuit, a clamping switch, a current sampling module, a peak holding module, a comparator and a controller. According to the invention, the waveform quality of the high-power electromagnetic transmitter can be effectively improved, and the transmitting performance is improved from two aspects of a rising edge and a falling edge. Development of a near-source electromagnetic method including SOTEM is promoted, and more powerful technical support is provided for a deep prospecting strategy.

The invention relates to the technical field of electric power systems, in particular to an electric power system synchronous control circuit, which comprises a power generation boosting main loop which comprises a power generator, a main transformer and a bus and is used for realizing electric energy production, voltage conversion and ultrahigh-voltage grid-connected transmission; the voltage acquisition loop comprises a first voltage acquisition sub-loop and a second voltage acquisition sub-loop, and the first voltage acquisition sub-loop is provided with a plurality of groups of buses and voltage transformers and is used for acquiring bus system side voltage signals and converging and transmitting the voltage signals; the second voltage acquisition sub-loop is provided with a generator-side voltage transformer and a branch switch and is used for acquiring and transmitting a generator-side voltage signal; in a signal acquisition link, a double-bus and spacing line collaborative sampling architecture is adopted, independent voltage acquisition is carried out on a first bus, a second bus and an associated spacing line through a voltage transformer, and full-domain voltage signal coverage of a bus body, an auxiliary spacing line and generator output is realized in cooperation with redundant design of a generator-side double-branch branch wire and a switch.

The invention relates to the field of ultra-high-voltage cable manufacturing, in particular to cable split conductor stranding equipment and a cable split conductor stranding method. The cable split conductor stranding equipment comprises a first support (11), a first fixed outer ring (12) is arranged at the top of the first support (11), the inner wall of the first fixed outer ring (12) is connected with a stranding inner ring (14) through a first bearing (13), and a plurality of first baffles (15) extending in the radial direction are arranged on the inner wall of the stranding inner ring (14) at intervals. And the stranding inner ring (14) is equally divided by the plurality of first baffles (15). According to the invention, through systematically integrating each operation assembly, the existing manual stranding mode is effectively optimized, the operation process is simplified, the stranding efficiency is improved, the convenience and rapidness of manual stranding of segmented conductors can be realized, efficient technical support is provided for a quality verification link before batch production, and the method has a relatively high market promotion value.

The invention discloses a power cut plan self-service arrangement method using a dual check mechanism, and relates to the technical field of power system operation and maintenance, and the method comprises the steps: appointing a target year and month, and determining a superior ultra-high voltage power grid maintenance plan to form a set L; sorting the devices in the jurisdiction into sets A, B and C according to voltage levels; combining the plans to form A ', B' and C ', then carrying out first risk check, and automatically checking constraints such as a power failure period and supply guarantee demands based on a rule base; after the passing equipment is screened, remaining equipment maintenance is arranged, and a collaborative period parameter t is considered; and carrying out second risk check, checking safety indexes such as power flow out-of-limit, and moving to the next month if the plan is not passed. According to the invention, through a dual check mechanism, the reasonability, efficiency and safety of power-cut plan arrangement are improved.

The utility model relates to the technical field of ultra-high voltage cable processing, and discloses a drying and conveying device for cross-linkable polyethylene insulation materials for ultra-high voltage cables, which comprises a case, a material storage box is arranged above the case, a material baffle is arranged at the bottom of one side of the material storage box in a sliding manner, a reciprocating driving assembly is arranged on one side of the material storage box, and the reciprocating driving assembly is arranged on the other side of the material storage box. A first conveying assembly is arranged on the upper portion of the interior of the machine box, and a second conveying assembly is arranged on the lower portion of the interior of the machine box. According to the utility model, the reciprocating driving assembly can drive the striker plate to move up and down in a reciprocating manner, so that cross-linkable polyethylene insulating materials in the storage box can be discharged into the case in a clearance manner, and the materials are prevented from being stacked; by means of the first conveying assembly, entering materials can be conveyed, meanwhile, the materials subjected to preliminary drying enter the scattering box to be scattered, the materials are prevented from being adhered together, and then the scattered materials are conveyed again through the second conveying assembly.

The utility model relates to the technical field of signboard supports, in particular to a portable detachable signboard support for an ultra-high voltage transformer substation, which solves the problems that the procurement cost and the management complexity are increased due to the fact that the existing electric signboard supports cannot be used in a unified mode, and comprises a fixing block, a T-shaped sliding groove is formed in one side of the fixing block, and a T-shaped groove is formed in the other side of the fixing block. Rotating grooves communicated with the sliding groove are formed in the two sides of the sliding groove, threaded assemblies penetrating through the sliding groove are installed on the rotating grooves, two corresponding clamping rods are installed on the fixing block, one end of each clamping rod is fixedly connected with a sliding block in sliding connection with the sliding groove, and the inner side of the other end of each clamping rod is fixedly connected with a protruding block; the two protruding blocks are used for being hooked on the transverse fixing rod, arc-shaped grooves are formed in the inner sides of the clamping rods, the two arc-shaped grooves are used for enabling the two clamping rods to clamp a cement rod, inserting holes are formed in the end and the side wall of the connecting block, a signboard storage assembly used for fixing the signboard is inserted into one inserting hole, and a first jackscrew used for fixing the storage assembly is in threaded connection with the side wall of the connecting block.

The utility model relates to an ultrahigh-voltage switch shell turnover device which comprises a working table, and a first turnover mechanism and a second turnover mechanism are arranged on the working table in a bilateral symmetry mode. Each of the first turnover mechanism and the second turnover mechanism comprises a bracket, a rotating shaft rotationally connected with the bracket, a supporting seat fixedly connected to one end of the rotating shaft and a bidirectional telescopic cylinder fixedly connected to the supporting seat, two telescopic rods of the bidirectional telescopic cylinder are fixedly connected with top blocks, and a motor for driving the rotating shaft to rotate is fixedly arranged on the bracket; the first turnover mechanism is fixedly arranged on the workbench, the second turnover mechanism slides on the workbench, and a first driving mechanism for driving the second turnover mechanism to slide in the left-right direction is arranged on the workbench. The shell is tightly supported and fixed through the first turnover mechanism and the second turnover mechanism and is driven to turn over, the bottom of the shell is supported through the supporting assembly, turnover stability is improved, use is convenient, time and labor are saved, and machining efficiency is improved.

The utility model discloses a kind of superhigh voltage multicore photoelectric composite six types of data cable, including electric conductor, photoelectric subarea pipe sleeve, optical fiber, wrap layer, insulating layer, heat insulation layer, protective layer, outer armor, the electric conductor is installed in photoelectric subarea pipe sleeve inside, the optical fiber is installed in photoelectric subarea pipe sleeve inside, the wrap layer is wrapped in photoelectric subarea pipe sleeve side end, the insulating layer is coated in wrap layer side end, the heat insulation layer is coated in insulating layer side end, the protective layer is coated in heat insulation layer side end, the outer armor is coated in protective layer side end. The utility model solves the superhigh voltage multicore photoelectric composite six types of data cable when using, copper core of cable carries current and is easy to produce local hot spot, produces local overheating. When cable laying or running is subjected to vibration, bending, optical fiber is prone to stress concentration due to local increase and even breakage problem of attenuation.