44results about How to "Improve lightning protection performance" patented technology

The invention discloses a detailed terrain data-based transmission line failure-shielding and lightning-protection performance evaluation method. The method comprises the following steps of: acquiring statistical lightning data of a line corridor in a specified time period by a lightning parameter statistical method by adopting line basic information, line geographic information, line structural characteristics and line insulation characteristics; scanning a three-dimensional coordinate of a transmission line corridor by using geographic information system (GIS) software; determining the landscape along a line and a ground angle according to the three-dimensional coordinate in the direction vertical to the line corridor; determining wire-to-ground height variation caused by surface undulation according to the three-dimensional coordinate in the direction along the line, and acquiring detailed terrain data along the line by three-dimensional GIS scanning; calculating the shielding failure trip-out rate of each base tower according to the detailed terrain data extracted based on the GIS scanning; and acquiring real line failure-shielding and lightning-protection evaluation data in the specified time period by comparing a design value, a specified value or an operation experience value of the line failure shielding trip-out rate with a reference value of the line failure shielding trip-out rate. Therefore, the line failure-shielding and lightning-protection performance evaluation is realized.

The invention provides an underground electric vehicle wireless charging device. The underground electric vehicle wireless charging device is arranged below the ground of a parking place, and comprises a charging main machine core, charging transmitting coils, a heat dissipation circulation device and a dehumidifying device. The heat dissipation circulation device is used for dissipating heat of the charging main machine core, and the dehumidifying device is used for dehumidifying the interior of a cavity of the heat dissipation circulation device. The charging main machine core comprises an NFC module, a microcontroller, a Bluetooth communication module, a power conversion circuit, a working state indicator, a power switch controller, a wireless communication module and a metering circuit. The functions of machine starting, remote payment management and charging management can be achieved. The underground electric vehicle wireless charging device has the advantages of being high in safety and good in lightening-protection effect, occupying a few city space resources, beautifying the city environment and the like.

The invention discloses a low-voltage varistor ceramic chip which is formed by sintering mixed powder. The mixed powder comprises, by mass, 94-96% of ZnO, 0.2-4% of Bi2O3, 0.1-0.6% of MnCO3, 0.1-2% of Co3O4, 0.1-0.6% of NiO, 0.002-0.02% of Al(NO3)3, 0.1-0.5% of TiO2, 0.01-0.5% of Nb2O5, and 0.01-2% of Sb2O3. With the low-voltage varistor, low-voltage varistor 8/20 [mu]s waveform through-flow performance can be well improved, and low-voltage varistor energy-bearing capacity can be improved. The high-energy low-voltage varistor has good lightening resistance. Also, the invention provides a preparation method of the low-voltage varistor ceramic chip and a preparation method of the low-voltage varistor.

The invention aims to provide a tower node connection device made from a composite material and an installation and application method. The connection device adopts all composite material for connection, and solves the influence of a metal connection member, adopted to connect a main pole and a cross arm, on the insulating performance of a composite material tower and the problems on tower weight and lightning proof arrangement brought about by the metal connection member. The device mainly comprises the main pole, a hoop and the cross arm. The hoop includes a hoop main body, an insert-connection base and a reinforcing wall. The cross arm has a round or polygonal cross section. The main pole adopts a composite material winding structure, and has a tapered whole body. The cross arm is formed by pultrusion or winding molding and has a conical or columnar structure, and the external part of the cross arm is of shed structure. The node hoop is formed by resin transfer molding, and has a boss reverse locking structure at the part insert-connected with the cross arm. The device makes full use of the insulation gap between the electrified part of the tower head and the grounding part to realize line corridor compression and lightning protection improving effects.

The invention relates to a lightening protection layer stranded optical cable, comprising a cable core and a sheath sheathed outside the cable core. The cable core comprises a strengthened core and at least one fiber bundle tube composed of a loose tube and internally mounted optical fiber of the loose tube as well as a stuffer fiber paste surrounding the strengthened core; the sheath comprises a fastening yarn layer, a steel-plastic composite layer and an outer sheath that are coated on the cable core from inner to outer in turn, and water-proof fiber paste is filled between the cable core and the fasten yarn layer; the invention is characterized in that the strengthened core is a glass fiber reinforced plastic (FRP) bar; the external part of the glass fiber reinforced plastic (FRP) bar is provided with a polyethylene coating layer; a polyethylene buffer layer is installed between the fasten yarn layer and the steel-plastic composite layer; and the outer sheath is a polyethylene outer sheath. The optical cable has the following beneficial effects: the optical cable has good lightening protection performance; the polyethylene buffer layer is added and can prevent the cable core from being damaged, thereby realizing firm structure of optical cable, safe and reliable work; and the optical cable can be used in lightning-prone area, in particular being used as outdoor optical fiber of military network.

The invention relates to a lightning protection device which comprises a shell and electrodes. Arc extinguishing chambers and at least two electrode chambers are formed in the shell, the inner-wall surface of each arc extinguishing chamber is round and smooth, the arc extinguishing chambers and the electrode chambers are arranged in a staggered manner, each arc extinguishing chamber is provided with two openings which are communicated with the two adjacent electrode chambers respectively, and each arc extinguishing chamber is communicated with the outside through an arc blowing passage; a lightning receiving face is arranged at each of two ends of each electrode, the electrodes are placed in the electrode chambers, the lightning receiving faces at the two ends of the electrodes are exposed in the arc extinguishing chambers on two sides of the electrode chambers at the same time to communicate the arc extinguishing chambers on the two sides, and a flashover gap is reserved between the two lightning receiving faces in each arc extinguishing chamber. The lightning protection device is free of charge accumulation effect, less prone to being broken down under identical gap voltage and capable of improving line insulation level; especially when being on a high-voltage power distribution line network, influence on power distribution quality caused by voltage fluctuation of the power distribution network due to great lowering of voltage of the power distribution network because of frequent misoperation discharging of the lightning protection device can be avoided.

The invention discloses a construction method of a solar energy lightning protection facility on a building roof. The construction method comprises steps of carrying out external lightning protection and equipotential bonding on a solar energy photovoltaic power system, shielding and protecting a power circuit of the solar energy photovoltaic power system. The solar energy lightning protection facility has the characteristics of good lightning stroke resistant effect, wide application range and universality; the construction method is a fundamental measure for guaranteeing the personal safetyand property safety of building users and is an optimal means for the lightning stroke anticipating control of the solar energy facility; therefore, the construction method has the practical applicability characteristic; and the construction method has the systematic characteristic as the anticipating control is comprehensively carried out in terms of external lightning stroke anticipating control, equipotential bonding, circuit shielding, power line and signal wire protection of the solar energy facility.

This application relates to an overload and unbalanced load detecting system for a railway and a detecting method. This system includes at least one steel rail. A rail web of each steel rail is provided with two sampling points at two sides between every two adjacent rail sleepers, respectively, and the two sampling points on one side are symmetrically disposed about the steel rail with respect to the two sampling points on the other side. A fiber-optic sensitive element used for continuously measuring a load when a train passes through the two sampling points is obliquely fixed at each sampling point, and two fiber-optic sensitive elements on the same side of each steel rail are disposed at an angle of 90° with each other.

The invention relates to a novel non-metal layer-twisting mining optical cable which includes a cable core and a sheath assembly which is installed outside the cable core in a sleeved manner. The cable core includes a reinforcing core and at least one optical-fiber bushing which is twisted around the reinforcing core. A plurality of optical fibers are installed in each optical-fiber bushing and the optical-fiber array methods in the optical-fiber bushings are different. The sheath assembly includes an external sheath, a sheath, a reinforcing layer and an internal sheath. The internal sheath, the reinforcing layer, the sheath and the external sheath wrap the cable core sequentially from inside to outside. The reinforcing layer includes a plurality of stiffeners which surround the internal sheath uniformly. A cable opening rope is arranged in the external sheath. A cable paste fills a part between the cable core and the internal sheath. The stiffeners and the reinforcing cable are made of an FRP material so that the optical cable is high in tensile strength, capable of meeting demands of optical fibers with a large number of cores and preventing thunder strikes and blast of combustible gases caused by generation of static electricity, and simple to lay.

The invention discloses a silicon carbide lightning protection material and a preparation method thereof, and belongs to the technical field of lightning protection material preparation. The technical problem to be solved by the invention is to improve the heat-conducting property. The preparation method comprises the following steps: respectively weighing 5-25 parts by weight of silicon carbide and 75-95 parts by weight of epoxy resin, adding the weighed silicon carbide into the weighed epoxy resin under the condition of mechanical stirring, conducting stirring at normal temperature for 10-12 hours to obtain a silicon carbide epoxy resin solution, immersing carbon fibers into the epoxy resin solution to obtain a carbon fiber reinforced resin prepreg, then laying the carbon fiber reinforced resin prepreg into a carbon fiber reinforced resin prepreg plate by adopting a hand lay-up method, immersing a metal extension net into the silicon carbide epoxy resin solution, taking out the metal extension net, laying the metal extension net on the carbon fiber reinforced resin prepreg plate prepared in the step 2, carrying out vacuum hot pressing, and then conducting cooling to room temperature to obtain the silicon carbide lightning protection material. The invention is used in the field of lightning protection materials.

The invention discloses a preparation method for a lightning-protection semiconductor material, belonging to the technical field of lightning-protection semiconductor materials. The preparation method provided by the invention comprises the following steps: weighing ball-milled flake graphite powder, adding the ball-milled flake graphite powder into a reaction solution of potassium dichromate and sulfuric acid so as to obtain a reactant, soaking the reactant with sodium nitrate, after the completion of soaking, carrying out calcination so as to obtain a calcined substance, mixing the calcined substance with ferric sulfate and ferric chloride, adding alkali and carrying out a reaction so as to generate ferroferric oxide, carrying out ultrasonic dispersion and crystallization so as to obtain modified expanded graphite, mixing the modified expanded graphite with polyaniline and the like, and carrying out granulation so as to obtain the lightning-protection semiconductor material. According to the invention, the flake graphite powder is used as a raw material, and the surface of the flake graphite powder is modified and loaded with nanometer ferroferric oxide, so excellent performances like electric conduction, lubrication and shapability can be achieved; charges accumulated on the surface of the semiconductor material can be remotely migrated at a constant speed; the disadvantage of imbalance of local current and ionic current on the surface of a traditional semiconductor material can be compensated; and instance results prove that the lightning-protection semiconductor material provided by the invention has the advantages of good adhesiveness with a composite material, excellent lightning-protection effect and wide economic prospects.

The invention discloses a transformer box with a lightning stroke protection function and a lightning protection method of the transformer box, which relates to the technical field of matching facilities of electric power equipment. The invention comprises a box body, an inner wall of the box body is fixed with a wire arranging assembly; An electric appliance mounting plate is fixed on the inner wall of the box body; A surface of that box body is fix with a plurality of first lightning protection components; A surface of that box body is fixed with a plurality of second lightning protection components; A first round rod is fixed between the second lightning protection assemblies; A surface of that box body is rotatably connected with a box door through a hinge; A surface of that box door is fixed with a door lock; A surface of that box body is fixed with a ventilation assembly; A first bracket is fixed on the opposite inner wall of the box body. A first rectangular hole is arranged onan opposite surface of the box body. The invention prevents lightning strike through double safety of the first lightning protection component and the second lightning protection component, effectively prevents rainwater from being blown into the inside of the box by the wind, and the wire management component protects electric appliances in the box fixedly, which has the advantages of safety andreliability.

The invention relates to the technical field of power tubes, and particularly to a lightning-proof optical fiber communication pipeline and a preparation method thereof. The lightning-proof optical fiber communication pipeline in the invention comprises a body, wherein the outer surface of the body is coated with an insulation shielding layer with a thickness of 6-8 mm, the insulation shielding layer is prepared from a shielding filler, and the shielding filler comprises 10-15 parts of modified ceramic, 4-6 parts of flaky nanometer aluminum nitride and 3-5 parts of modified silk mica. The lightning-proof optical fiber communication pipeline prepared by the invention can bear instantaneous lightning voltage in the use process, has a good lightning-proof effect, and also has good flame retardant property.

The invention discloses a flexible composite film, a flexible oil bag comprising the flexible composite film and a storage tank comprising the flexible oil bag. The flexible composite film comprises a first oil-resistant layer, and a polyester woven fabric, a second oil-resistant layer, a barrier layer and a static dissipation layer which sequentially cover the inner surface of the first oil-resistant layer; and the tensile strength of the flexible composite film is greater than or equal to 92 MPa. On one hand, the flexible composite film designed by the invention not only has very good rebound resilience, but also has very strong tear and puncture resistance, the flexible oil bag formed by the flexible composite film is used for separating an oil product from the air, so that'big breathing and small breathing 'are on the same side as the air, the volatilization space is eliminated, the volatilization loss is inhibited, flammable and combustible oil gas is prevented from being formed, meanwhile, random deformation is ensured under the condition of no fracture, and the safety index is improved; and on the other hand, the flexible oil bag and the storage tank are effectively combined, so that a double-layer gap is formed between tank walls of the storage tank to monitor leakage, and the technical problems existing in the storage and transportation industry are solved.

The invention discloses a zigzag connection load balance transformer which comprises an iron core, a primary side winding and a secondary side winding. The primary side winding comprises three-phase windings AN, BN and CN, star connection is adopted, a neutral point N of the primary side winding is allowed to be grounded. In the secondary side winding, a phase A winding is composed of ao, fo and be, a phase B winding is composed of bo, do and cf, and a phase C winding is composed of co, eo and ad. The secondary side winding forms a triangular winding. When ao with the same winding direction as the primary side winding is a main winding, ad and do which are in zigzag antiphase connection are additional windings; when bo is a main winding, ad and eb are additional windings; and when co is a main winding, of and fc are additional windings. The zigzag connection load balance transformer has special load current transfer characteristics, current distribution of the primary side can be improved under the conditions that a secondary side loads of a power distribution network are asymmetric, a three-phase current tends to be balanced, transformer and electric transmission line loss is reduced, the capacity utilization rate of the transformer is improved, and the electric energy loss of a line is effectively reduced.

The invention discloses a quantitative distribution system of oil products. The system realizes automatic control of quantitative distribution of oil materials. A driver manipulator is connected with an optical fiber exchange machine by an industrial Ethernet; a PLC (programmable logic controller) batch controller is also connected with the optical fiber exchange machine by the industrial Ethernet; and an oil distribution system server and an oil distribution system upper computer are connected with the optical fiber exchange machine by the industrial Ethernet in the same way. When one driver manipulator has a fault, IP addresses of PLC controllers to which other driver manipulators point are configured such that the other driver manipulators can send instructions to the PLC batch controller corresponding to the driver manipulator with the fault to enable the PLC batch controller to quantitatively control an oil distribution pipeline to distribute oil, therefore, the oil distribution operation of an oil distribution platform cannot be influenced and the normal oil distribution of an oil depot is guaranteed.