36results about How to "Avoid tripping accidents" patented technology

The invention discloses a solar anti-bird device and method for a high-voltage transmission line tower. The device comprises a fixing base, a connection plate, a tank body and a solar cell panel, the fixing base is fixedly arranged on a cross arm of the high-voltage transmission line tower through fastening bolts and nuts, and the connection plate is arranged on the fixing base; the tank body is arranged on the middle of the connection plate, two symmetric medicine liquid spraying devices are arranged in the tank body, the solar cell panel is fixedly arranged on the connection plate through a supporting rod, and sound generation devices are symmetrically arranged at two ends of the bottom of the solar cell panel; the medicine liquid spraying devices comprise medicine liquid tanks, liquid inlet pipes, seal covers, liquid outlet pipes and mist spray nozzles; a storage battery, an intelligent control device and a medicine liquid pump are further arranged in the tank body. According to the solar anti-bird device, the solar energy is adopted to supply energy, and bird-afraid pungent smell and sound are generated to achieve the double anti-bird aim.

The invention discloses an auxiliary tool for insulator replacement. The auxiliary tool comprises a base, a bottom plate, two bearing limit boards, a lever, hooks, pull rings and a positioning shaft, a bayonet provided with an opening in one side is arranged in the base, and the bottom plate is fixed above the base; the bearing limit boards are parallely arranged with lower ends fixed on the upper end face of the bottom plate; a through hole penetrating two sides of the lever is arranged in the lever, the positioning shaft is horizontally arranged and penetrates the through hole in the lever, two ends of the positioning shaft are respectively connected with the bearing limit boards, and the hooks and the pull rings are respectively connected to two ends of the lever. The invention further discloses a method for replacing an insulator with the above auxiliary tool. The auxiliary tool is convenient to operate, timesaving and laborsaving during replacement of the damaged insulator, an operator carrying a lead on the shoulder can be avoided, injury to the operator by pushing acting force of the lead can be avoided, and influence to work enthusiasm of the operator prone to be injured can be eliminated.

The invention discloses an energy-saving and anti-shake controller circuit of a contactor. The controller circuit comprises an electronic energy-saving modular circuit (08) for the contactor and an electronic energy-saving modular full-voltage automatic time-sharing batching restart control circuit (013), wherein the electronic energy-saving modular circuit (08) for the contactor consists of a full-voltage AC (Alternating Current) (DC (Direct Current))-DC conversion circuit (04) with a short-circuit protection function, a full-voltage "intelligent switch-on operation" and low-voltage holding circuit (06) and a voltage inverse pulse width time occurrence circuit (07); and the energy-saving modular full-voltage automatic time-sharing batching restart control circuit (013) consists of a low-pass filtering full-voltage AC (DC)-DC conversion circuit (011) with an automatic working voltage interval option function, and a multifunctional time-sharing restart signal occurrence and control circuit (012). The controller circuit adopts a control voltage Us inverse time pulsed full-voltage start, wide-voltage and constant-power output low-voltage DC holding and automatic shake and outage time-sharing batching restart technology.

The invention provides a stable operation method used during primary fan frequency-conversion power frequency switching. According to the technical scheme, an alternating current bus sequentially passes through a distribution room power frequency switch (QF) and a frequency converter input side switch (QF1) to be connected with the input end of a frequency converter, the output end of the frequency converter is connected with a motor of a primary fan through a frequency converter output side switch (QF2), the two ends of a bypass power frequency switch (QF3) are connected with a connection point of the distribution room power frequency switch (QF) and the frequency converter input side switch (QF1) and the motor of the primary fan correspondingly. The operation method comprises the steps that when the frequency converter operates normally and when the power frequency is judged to be cut according to the operation condition of the primary fan, or when the frequency converter breaks down, and sequentially, the frequency converter output side switch (QF2) is switched off, the bypass power frequency switch (QF3) is switched on and the frequency converter input side switch (QF1) is switched off, so that the primary fan is switched into a power frequency operation state. According to the method, when the frequency converter breaks down or is normally switched to a power frequency bypass, the situation of tripping caused by the fact that over-current occurs is avoided.

The invention discloses an electric transmission and transformation equipment contact luminous temperature sensing cap system. The system comprises a power supply device, an electric transmission and transformation equipment contact luminous temperature sensing cap and a monitoring center; the power supply device is electrically connected with the electric transmission and transformation equipment contact luminous temperature sensing cap; the electric transmission and transformation equipment contact luminous temperature sensing cap comprises a wireless transmitting module, and the wireless transmitting module is communicated with a wireless receiving module of the monitoring center through a network; and the electric transmission and transformation equipment contact luminous temperature sensing cap also comprises a fixed and shielded part and a temperature measuring part, wherein the temperature measuring part is arranged in the fixed and shielded part, and a luminous early warning device is arranged in the temperature measuring part. The invention has the advantage that the system is affected little by the outside because independent circuits are used for monitoring the temperature. Different color lamps are displayed according to different temperature control circuits, and the system can accurately monitor temperature, and has stable performances and an obvious practical effect.

The invention relates to a function module capable of preventing protection misoperation caused by analog quantity signal hopping. According to the invention, in allusion to the condition that a power unit trips because of instant hopping of analog quantity signals in the production process, the function module is developed to prevent the protection misoperation caused by signal instant hopping by using a logical configuration function of application software in a DCS computer control system. When instant hopping occurs in the analog quantity signals, the protection function module can retreat the analog quantity signals from a computer control logical operation circuit timely and alarm, thereby being capable of avoiding occurrence of the condition that the equipment trips because of hopping of one analog quantity signal. The protection function module provided by the invention can be widely applied to input circuits of the computer control system.

The invention discloses a mounting clamp for a hot-line work wire clip. The mounting clamp is formed mainly by hinging a left clamping rod body and a right clamping rod body through a middle pin shaft. A clamping rod head part capable of clamping the wire clip is arranged on the front section of each clamping rod body, and an integrated clamping force rod is arranged on the rear section of each clamping rod body. A left hand thread hole and a right hand thread hole are formed on the end parts of the clamping force rods respectively, and a rotating double-thread rod with a left hand thread section and a right hand thread section is screwed into the left hand thread hole and the right hand thread hole. An operating rod joint is arranged on one end part of the rotating double-thread rod, and can be connected with an insulating operating rod. Nylon clamping block is arranged on the clamping rod head parts. A clamp nylon positioning pillar for directly clamping the wire clamp is also arranged outside the nylon clamping block of at least one clamping rod head part. The mounting clamp has the characteristics of convenience for operation, short operating time, firmness and reliability of the mounted wire clip, and the like.

The invention provides an insulator, which comprises a discharging part. The discharging part comprises a flow current cutoff device; the flow current cutoff device comprises an insulated shell, conductive connection pieces and an air gap assembly; the conductive connection pieces are fixedly arranged at two ends of the insulated shell; the air gap assembly is fixedly arranged in the insulated shell; two ends of the air gap assembly are respectively electrically connected with the corresponding conductive connection pieces; and the air gap assembly is provided with at least one air gap, and the air gap is insulated in a predetermined low voltage range and punctured in a predetermined high voltage range. The insulator also comprises a fixing connection part and a line mounting part, wherein the fixing connection part is used for fixedly mounting the insulator; and the discharging part is located between the fixing connection part and the line mounting part. The insulator of the invention can well replace an insulator in the prior power transmission line and a high voltage surge arrester additionally arranged specially, and the insulator has the advantages of strong flow current cutoff ability, large instant through current ability, light weight, small size and low cost.

The invention relates to a power transmission line anti-disruption device based on GPS+ field strength induction, and a control method thereof, and belongs to the technical field of operation and maintenance of power transmission lines. The device comprises a high-voltage detector installed on the top end of a mechanical arm rod of a construction vehicle, and a vehicle-mounted terminal installed on the windshield of an operating room of the construction vehicle, the high-voltage detector is in wireless communication connection with the vehicle-mounted terminal, the vehicle-mounted terminal isin wireless communication connection with a remote server, the remote server communicates with mobile phones of an operation and maintenance staff and a construction machine driver, the remote serveris further in communication connection with a database server and a monitoring computer, and the database server communicates with the monitoring computer. The power transmission line anti-disruptiondevice provided by the invention can effectively monitor the operation of the mobile construction machinery near a line protection area, and avoid the occurrence of a disruption trip accident of the construction machinery.

The invention discloses a multifunctional on-line monitoring early-warning device of a high-voltage line. The multifunctional on-line monitoring early-warning device comprises an early-warning devicebody, a solar cell panel, a singlechip microcomputer, a radar assembly, an infrared on-line detector, a sedimentation level, an inclination detector, a network signal system and a clamping mechanism,wherein the radar assembly is fixedly arranged on the early-warning body, the inclination detector and the network signal system are connected to the early-warning device body, the clamping mechanismis used for connecting the on-line monitoring early-warning device and high-voltage pole tower angle steel, the radar assembly comprises a radar detector and a relay, the relay is used for controllingwhether the radar detector is dormant or not, an output signal end of the radar detector is connected with an input signal end of the relay, an output signal end of the relay is connected with an input signal end of the singlechip microcomputer, output signal outputs of the infrared on-line detector, the sedimentation level and the inclination detector are connected with an input signal end of the singlechip microcomputer, and an output signal of the singlechip microcomputer is transmitted to a client by a signal. By the multifunctional on-line monitoring early-warning device, an external damage accident of the high-voltage line can be effectively prevented.

The invention discloses an alternating current transmission line iron tower which comprises a tower body and a cross arm at the top end of the tower body. The middle and the two ends of the lower side of the cross arm are each connected with a lightning-proof insulator. The lower ends of the lightning-proof insulators at the two ends are each connected with a side phase conductor. The lower end of the lightning-proof insulator in the middle is connected with a middle phase conductor. A compound fiber overhead ground wire is arranged on the waist of the tower body. The conductors are suspended on the lightning-proof insulators, so that the alternating current transmission line iron tower has the functions of suspension, insulation and lightning prevention at the same time. When ground lightning directly strikes the tower or the conductors, the lightning overvoltage will make the lightning-proof insulators move, impact energy is absorbed, the overvoltage is suppressed so as to protect the insulators against flashover, tripping of a transmission line is avoided, and power supply reliability is improved; the compound fiber overhead ground wire is located below the three phase conductors, so that the normal power communication function is achieved, the lightning overvoltage on the lightning-proof insulators can be decreased due to the coupling effect, the lightning-proof level is further improved, the lightning tripping frequency of the transmission line is effectively decreased, and the power supply reliability is improved.

The invention provides an amorphous alloy iron core structure used for a photovoltaic transformer and capable of preventing heat emission, wherein the amorphous alloy iron core structure used for the photovoltaic transformer comprises an amorphous alloy iron core, a silicon steel sheet and a winding, wherein the amorphous alloy iron core is used for conducting magnetism; the silicon steel sheet is arranged at the innermost layer of the amorphous alloy iron core and used for keeping the strength of the amorphous alloy iron core; a plurality of notches are arranged at different positions in the width direction of the silicon steel sheet, such that the section area of the silicon steel sheet is reduced; and the winding is wound on the amorphous alloy iron core and the silicon steel sheet and used for transmitting electric current, such that electric energy is converted into electromagnetic energy. According to the invention, eddy current generated by magnetic leakage in the iron core can be reduced; local overheat faults of the iron core can be eliminated; and simultaneously, the structural strength of the amorphous alloy iron core cannot be destroyed.

The invention relates to an automatic control device for a mine water pump. A water inlet pipe of the water pump communicates with a bottom valve at the bottom of a water sump in a sealed mode, and a hydraulic-control combined valve is connected to a water outlet pipe of the water pump in a sealed mode in series. A water level controller is arranged in the water sump and is in signal connection with a programmable control switch. A deflation overflow signal valve is arranged on the water pump and is in signal connection with the programmable control switch. The automatic control device for the mine water pump is simple in structure, safe, reliable and high in automation degree.

The invention discloses a method for transforming the power supply of a coal feed. A time-delay relay KY1 is newly added into a control loop of the coal feeder; an operation feedback device is arranged on a normally open contact of the time-delay relay KY1; two paths of self-holding contacts are in parallel connection, which are normally open contacts of a relay K2 and normally open contacts of the time-delay relay KY1 respectively; the coil of a relay K3 is electrically connected onto a normally closed contact of the self-holding relay K2; the electricity used in the normally closed contact of the relay K2 is directly taken from the outlet of a fast switching device; and three pairs of normally open contacts in the relay K3 transmitted to a frequency changer, a calculation device and a low voltage ride through are normally closed contacts respectively. According to the transformation method, the occurrence of tripping accidents of the coal feeder in the two-path power supply switching process of a coal feeder on-site control cabinet is avoided, the maloperation probability of the coal feeder is reduced, and the operation reliability of the equipment is improved.