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

All new type of corner electric power pylon different from drum type pylon can realize 100% purpose for building compact type transmission line with dual loop in same pylon. Cooperating to compact type straight-line pylon, the corner pylon arranges conducting wires in del shape, and space between wires in three phases being same as straight-line pylon. The corner pylon includes three layers of cross arm: earth wire, upper conductor, and lower conductor. Three layers of cross arm are distributed on two sides of pylon and in same vertical plane. The cross arm of upper conductor is in use for suspending conductor in two phases; and the cross arm of lower conductor is in use for suspending conductor in lower phase. Small cross arms are added on cross arms of earth wire and upper conductor in order to solve issue of wire jumper. Features are: shrunken size of pylon head, shorter 12.0m than height of general type, light weight and raised capability of lightning proof.

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 discloses a three-layer plastic optical fiber Ethernet switch. The Ethernet switch comprises a network management subsystem, a driving subsystem and a switching protocol subsystem which are sequentially arranged in three layers; and routing learning and data packet forwarding are separated in a switching process, wherein the routing learning is realized by a routing protocol run by a central processing unit (CPU) of the network management subsystem, and the data packet forwarding is realized by switching circuit hardware. The Ethernet switch solves the technical problem of the absence of a plastic optical fiber Ethernet switch, has the high capacity of resisting interference and preventing lightning stroke and secrete divulgence, provides an efficient solution on the reliability and security of network communications from a hardware platform and abundant and secure network management functions, and has the functions of network storm isolation, network access authority control, IP address spoofing and hacker attack prevention and the like as core switching equipment in an autonomous system.

The invention discloses a structure and manufacturing process of a low-cost carbon fiber composite material empty rail car body, which belongs to the technical field of application of composite materials on rail vehicles, and includes car body side walls, and both ends of the car body side walls are assembled The end wall is connected, the inner top surface and the inner bottom surface of the side wall of the car body are respectively assembled and connected with a top frame and the bottom frame, and the outer top surface of the side wall of the car body is assembled and connected with a ceiling, and bogie mounting holes are opened on the ceiling; The side wall and the end wall of the car body all include a stiffener skeleton, an inner skin and an outer skin, and the grid of the stiffener skeleton is filled with sandwich foam blocks; the roof includes a sandwich laminate, an upper skin and a lower skin skin; the top frame, the bottom frame, the rib skeleton, the inner skin, the outer skin, the upper skin and the lower skin are all integrally molded by carbon fiber composite materials; the inside of the rib skeleton is filled with sandwich foam, The purpose of meeting the function and structure of the bearing mode of the suspended car body is achieved under the premise of light weight of the car body.

The invention discloses a passive optical splitting RS-485 optical fiber bus access method, which is characterized in that it comprises the following steps: (1) setting the RS-485 bus control terminal; (2) setting the passive RS-485 optical network office (3) set the passive RS-485 optical network terminal; (4) set the user terminal equipment; (5) the RS-485 bus control terminal sends out the control signal, and the passive RS-485 optical network local end converts the control signal into The optical signal is transmitted to the passive RS-485 optical network terminal, and the optical signal is converted into an RS-485 bus logic signal to control the user terminal equipment; (6) The user terminal equipment sends the feedback data signal through the passive RS-485 optical network The terminal converts the optical signal into an optical signal, and then transmits the optical signal to the passive RS‑485 optical network central office through the optical fiber, and the passive RS‑485 optical network central office converts the optical signal into an RS‑485 bus level or RS‑485 232 level signal, transmitted to the RS-485 interface or RS-232 interface of the RS-485 bus control terminal. The invention also discloses a system for implementing the method.

The invention discloses a passive light-splitting RS-485 optical fiber bus local side system. The system is characterized in that the two ends of the system are connected with an RS-485 bus control terminal and a passive RS-485 optical network terminal of an industry optical fiber bus for passive light splitting respectively. The system comprises a power module, a main control panel, a plurality of plane waveguide optical dividers and a plurality of light ports which are connected. The main control panel comprises an RS-232 center control interface, an RS-485 center control interface, two RS-485 cascade interfaces, a plurality of photoelectric conversion modules and a bus arbitration processor. The RS-232 interface and the two RS-485 cascade interfaces are connected with the bus arbitration processor and the RS-485 bus control terminal. One ends of the multiple photovoltaic conversion modules are connected with the bus arbitration processor, and the other ends of the multiple photovoltaic conversion modules are connected with one ends of the plane waveguide optical dividers. The other ends of the plane waveguide optical dividers are connected with the light ports.

The invention provides an electric leakage protection socket with discharge metal sheets. The electric leakage protection socket comprises a shell, a pair of power input conductors, a pair of output conductors with conductive plug bushes and a control circuit board which is used for controlling the switching-on / switching-off of the input conductors and the output conductors, wherein the power input conductors respectively have conductive pins; a pair of discharge metal sheets are correspondingly arranged in the shell; the discharge metal sheets have contact conductive positions which are in fit with the conductive pins of the power input conductors; and the two discharge metal sheets have discharge tips or arc surfaces, which face each other at intervals. The electric leakage protection socket with the discharge metal sheets has the advantages that: the discharge metal sheets and the corresponding conductors are arranged in a separated mode; a connection mode is simple and reliable; with only a set of molds, the discharge metal sheets can be interchanged for use; the discharge metal sheets are convenient to process, and materials are saved; and the discharge metal sheets are fixedand packaged in a base of the shell, and other elements cannot be influenced in a discharge process.

The invention discloses a multi-port terminal of a passive beam splitting RS-485 optical fiber bus. The multi-port terminal is characterized in that the two ends of the multi-port terminal are connected with passive RS-485 optical network local sides of the passive beam splitting RS-485 optical fiber bus and user terminal devices, the multi-port terminal comprises a power supply module, a bus arbitration processor, a plurality of optical conversion modules, a plurality of high-speed optical couplers, multiple RS-485 interface units, two RS-485 cascading interface circuits, two optical fiber cascading interface circuits, multiple routes of RS-485 drive chips, multiple three-stage lightning protection circuits and an optical fiber uplink port circuit, the optical conversion modules, the two RS-485 cascading interface circuits and the high-speed optical couplers are connected with the bus arbitration processor, the optical uplink port circuit and two optical fiber cascading interfaces are connected with the optical conversion modules, and the RS-485 drive chips are connected with the high-speed optical couplers and the three-stage lightning prevention circuits.

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.