30results about How to "Improve lightning protection ability" patented technology

The invention discloses a structure and a manufacturing process of a low-cost carbon fiber composite material sky railway train body, and belongs to the technical field of application of composite materials on rail vehicles. The structure comprises a train body side wall, wherein end walls are assembled and connected to the both ends of the train body side wall; a top frame and a bottom frame arecorrespondingly assembled and connected to the inner top surface and the inner bottom surface of the train body side wall, a ceiling is assembled and connected to the outer top surface of the train body side wall, and a bogie mounting hole is formed in the ceiling; the train body side wall and the end walls both comprise reinforced rib frames, inner skins and outer skins, and grids of the reinforcing rib frames are filled with sandwich foam blocks; the ceiling comprises a sandwich panel, an upper skin and a lower skin, and the top frame, the bottom frame, the reinforcing rib frame, the inner skins, the outer skins, the upper skin and the lower skin are all integrally molded from carbon fiber composite materials; and the inner portions of the reinforcing rib frames are filled with sandwichfoam, and the purpose of satisfying the function and structure of the load bearing mode of a suspension-type train body on the premise of light weight of the train body is achieved.

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 single-circuit power transmission line straight line side slope tower. The single-circuit power transmission line straight line side slope tower can ensure the distance between an uphill slope side wire and the ground and reduce the height of a downhill slope side wire, and therefore the circuit lightning protection performance is improved. According to the technical scheme, the single-circuit power transmission line straight line side slope tower comprises tower legs, a tower body, a tower head, three wires and wire insulator chains, the tower head is composed of a lower wire cross arm, an upper wire cross arm, a tower window, a lower ground wire cross arm and an upper ground wire cross arm, the lower ground wire cross arm and the upper ground wire cross arm are located at the top end of the tower window, a middle phase wire is installed inside the tower window in a linkage mode, the lower wire cross arm and the upper wire cross arm are located on the two sides of the tower head respectively and respectively provided with one side phase wire in a linkage mode, and the distance between the upper wire cross arm and the ground is basically equal to the distance between the lower wire cross arm and the ground, so that the three wires which are installed inside the lower wire cross arm, the upper wire cross arm and the tower window in a linkage mode are arranged parallel to a natural mountain gradient.

The invention discloses a network transformer as well as a network module and an electronic device using the same. The network transformer comprises a plurality of coil groups, an insulating partition board and a shell provided with a plurality of pins, wherein the network transformer is assembled on a printed circuit board through the pins of the shell; the insulating partition board is arranged in the shell and connected with at least two side walls of the shell to form a plurality of isolation grooves; and each isolation groove is used for accommodating one of the coil groups. In the invention, the insulating partition board is arranged in the shell of the network transformer to form the plurality of isolation grooves in the shell so as to respectively isolate the coil groups in the network transformer, thereby the condition that when the network transformer suffers from lightning strike, instant high voltage can puncture the winding on one coil to penetrate through another group of coil to cause damage of network equipment is avoided. The invention improves the lighting-strike resisting effect of the network transformer, saves peripheral parts and achieves the cost advantage.

The invention aims to provide a lightning-protected switch-signal indicating rectifier, which comprises a primary piezoresistor-redundancy bleeding-absorbing circuit array, a first inductor, a second inductor, a capacitor, a resistor-capacitor damping-absorbing circuit, a secondary piezoresistor-redundancy bleeding-absorbing circuit array and a redundancy-rectifying circuit array. A symmetrical structural design is adopted by the invention, so that the lightning-protected switch-signal indicating rectifier can perform a good lightning-protecting effect no matter high-energy electromagnetic pulses intrude from a cathode or an anode, and the integrated lightning-protecting capability of a lightning-protected switch-signal indicating-rectifier circuit is further enhanced through multi-level protection, low-pass filters and the utilization for a resistor-capacitor damping circuit with high-harmonic absorption. The lightning-protected switch-signal indicating rectifier is the circuit design of a bran-new lightning-protected switch-signal indicating rectifier, has good continuous lightning-protecting capability and can meet the working requirements of strong lightning areas with more than sixty annual mean thunderstorm days.

The present invention belongs to the technical field of structure design, especially relates to a combined anti-lightning shunt bar. The combined anti-lightning shunt bar comprises a button anti-lightning shunt bar (2) and an electric lapping joint (3). One end of the button anti-lightning shunt bar and the electric lapping joint are fixedly connected through an adhesive to form one body, and at the same time, the distance between the end face of the inlet of the groove of the electric lapping joint and a first button of the button anti-lightning shunt bar is not larger than 0.5mm, so that ina required range, the anti-lightning effect of the button anti-lightning shunt bar is greatly improved, and the combined anti-lightning shunt bar can ensure that a radome is smoothly installed on an aircraft, simplifies the craft process of installation of the button anti-lightning shunt bar and saves the assembling time.

The invention discloses a communication method for a passive beam splitting RS-485 optical fiber bus. A logic signal 0 of the RS-485 bus is represented when light exists, and a logic signal 1 of the RS-485 bus is represented when light does not exist. When a bus device does not send a signal, none of light emission units of photovoltaic conversion modules of the bus device can transmit an optical signal exceeding the specific intensity; in other words, when the logic 1 of the RS-485 bus is sent, the transmission judgment function is needed, and the fault that communication can not be conducted when bus chaos happens is prevented. In passive RS-485 optical network local sides, passive RS-485 optical network terminals and user terminal devices, only one device is allowed to send a signal at each moment, and the rest of the devices are in the interception state; data sending requests of all the user terminal devices are processed through the RS-485 bus control sides, all the user terminal devices can not transmit data until receiving data sending instructions which are sent by the RS-485 bus control sides and belong to the user terminal devices, otherwise the user terminal devices are in the silent interception state.

The invention discloses a passive light splitting RS-485 optical fiber bus single-ported terminal which is characterized in that two ends of the terminal are connected with a passive RS-485 optical network local side of a passive light splitting RS-485 optical fiber bus and a terminal device respectively, the terminal comprises a power module, a photoelectric conversion module, a phase conversion circuit, an RS-485 driving chip, two high-speed optical coupling circuits, a non-polar automatic transmitting and receiving reversing circuit and a three-level lightning protection circuit, one end of the photoelectric conversion module is connected with one end of the phase conversion circuit, the other end of the photoelectric conversion module is connected with one end of the first high-speed optical coupling circuit and one end of the second high-speed optical coupling circuit, the other end of the first high-speed optical coupling circuit is connected with one end of the non-polar automatic transmitting and receiving reversing circuit and the RS-485 driving chip, and the other end of the non-polar automatic transmitting and receiving reversing circuit, the other end of the second high-speed optical coupling circuit and the three-level lightning protection circuit are connected with the RS-485 driving chip.

The invention provides a floating ground equipment network port lightning protection system, which comprises a first connection terminal network port, a second connection terminal network port, a first network port transformer T1 and a second network port transformer T2, and is characterized in that a CMT0 pin of the first network port transformer T1 is connected to a mainboard ground through a fourth resistor R4, a fourth capacitor C4 and a fifth capacitor C5 which are sequentially connected in series; a CMT1 pin of the first network port transformer T1 is connected to a mainboard ground through a third resistor R3, a third capacitor C3 and a fifth capacitor C5 which are sequentially connected in series, and a CMT2 pin of the first network port transformer T1 is connected to the mainboard ground through a second resistor R2, a second capacitor C2 and a fifth capacitor C5 which are sequentially connected in series. And a CMT3 pin of the first network port transformer T1 is connected to a mainboard ground through a first resistor R1, a first capacitor C1 and a fifth capacitor C5 which are sequentially connected in series. The lightning protection device has the beneficial effect that the lightning protection capability of the floating ground equipment is improved.

The invention discloses a grounding reference point optimizing and connecting method for a star connection system of a mobile communication base station. The method comprises the steps of newly arranging an indoor grounding bar beside a distribution box and a first-level anti-thunder box in the mobile communication base station, electrically connecting the newly arranged indoor grounding bar with the original indoor grounding bar in the mobile communication base station by a lead, disconnecting the connecting leads between the original indoor grounding bar and the distribution box, the first-level anti-thunder box and an anti-thunder earth screen of the mobile communication base station, electrically connecting the newly arranged indoor grounding bar with a lead-out conductor of the anti-thunder earth screen of the mobile communication base station and then electrically connecting the newly arranged indoor grounding bar with the grounding end of the first-level anti-thunder box and the distribution box. The grounding reference point optimizing and connecting method for the star connection system of the mobile communication base station has the advantages of solving the problem of overlong leaking path of the thunder current caused by the overlong distance between the distribution box and the first-level anti-thunder box and the indoor grounding bar of the currently operated mobile communication base station, improving the anti-thunder capacity of the mobile communication base station and avoiding large-scale alteration on the original line.

The invention discloses a lightning protection device for a high-voltage power transmission line tower. The device comprises a \igh-voltage power transmission line tower lightning protection device comprises a transmission line tower and cross arm The cross arm of the transmission line tower located at two sides of the upper end The cross arm away from the power transmission line tower end of the insulator string is fixed The first connecting rod is fixed on the other end of the wire holder The wire holder above a fixed electrode of the connecting rod welding The fixed electrode connecting rod is provided with a wire electrode the top end of the second connection rod to the other end of the connecting rod is provided with a movable electrode, the movable electrode connected to a rod bottom end is provided with a ground electrode, the power transmission line tower two sides of the top of a support rod, the upper end of the support rod mounted with insulation anti-flash device, the top end of the support rod is connected to flash the needle is mounted, the invention is connected to flash the needle and the insulation anti-flash device for improving lighting capability, at the same time, by wire electrode and the grounding an electrical discharge between the electrodes preventing the wire insulator string is the lightning damage.