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

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 a contactor energy-saving anti-shake electric controller circuit, comprising an electronic energy-saving module circuit (08) for a contactor and a full-voltage automatic time-division and batch-restart control circuit (013) for the electronic energy-saving module. The energy-saving module circuit (08) consists of a full-voltage AC (DC)-DC conversion circuit (04) with short-circuit protection, a full-voltage "smart closing operation" and a low-voltage holding circuit (06), and a voltage inverse-time pulse width time generation The circuit (07) is composed; the energy-saving module full-voltage automatic restart control circuit (013) is composed of a low-pass filter full-voltage AC (DC)-DC conversion circuit (011) with automatic working voltage interval selection function (011), It is composed of multi-function time-sharing restart signal generation and control circuit (012). The invention adopts the control voltage Us inverse time limit pulsating full voltage start, wide voltage, constant power output low-voltage direct current holding and automatic restarting technology in time and batches after power outage.

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 a control system and a control method of a primary fan with a liquid resistance speed regulator, belongs to the technical field of automatic control of the primary fan with the liquid resistance speed regulator and aims to solve the technical problems that the primary fan system of the boiler in the prior art has not been put into automatic control, operates in the manual state all the time and has influences on the stable and economical operation of the boiler. The control system comprises a primary fan inlet baffle control device and a liquid resistance speed regulator control device, wherein the primary fan inlet baffle control device comprises a first function generator and a first adding device; the input end of the first function generator is connected to an input interface A; the output end of the first function generator is connected to a first input end of the first adding device; the liquid resistance speed regulator control device comprises a second function generator and a third adding device; the input end of the second function generator is connected to an input interface B; the output end of the second function generator is connected to a first input end of the third adding device. Through the control system and the control method of the primary fan with the liquid resistance speed regulator, the advantage that the boiler can operate stably and economically can be exerted.

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 discloses a method for suppressing power supply current spikes of urban rail transit based on interval temporary speed limit. The method is as follows: establish a train traction power supply system model, including a train model, a substation model, a catenary model, and a return network model; establish an operation data module, including a train data module, a substation data module, and a line data module; Speed ​​train operation characteristics module; establish a train operation characteristics module with temporary speed limit in the interval, including judging whether to limit the speed according to the peak value of the allowable power supply current, setting a speed limit mode that matches the peak value of the power supply current; traversing all time to get the temporary limit The current of the substation feeder cabinet under the speed mode is compared with the current of the substation feeder cabinet without the temporary speed limit mode to test the effect of the temporary speed limit on suppressing the peak of the supply current. The invention can suppress the peak value of the power supply current, prevent tripping accidents, and has the advantages of high feasibility, low cost and strong adjustability.

The invention provides a method and system for monitoring a respirator in a transformer. The method comprises the steps that a gas flow value output by the respirator in the transformer is collected in real time; a temperature value and a humidity value output by the transformer are collected in real time; the silica gel performance of the preset respirator is obtained according to the model number corresponding to the transformer; according to the silica gel performance, the preset moisture absorption performance curve of the respirator under the working condition of the gas flow value, the temperature value and the humidity value is obtained; according to the collected gas flow value, the collected temperature value and the collected humidity value, the water content curve of current suction gas of the respirator is drawn; and according to the preset moisture absorption performance curve of the respirator and the current suction gas water content curve of the respirator, the operation working condition of the respirator is determined. Through a flow meter which is serial on the respirator in the transformer, the gas flow value of the transformer is output, a silica gel performance curve is analyzed, then whether silica gel in the respirator loses efficacy is judged, and monitoring on the state of existing transformer respirator silica gel is achieved.

The invention discloses a MODIS data-based monitoring method for mountain fires near power transmission lines. Step 1: Obtain satellite image data and preprocess; Step 2: Identify and exclude pixel points corresponding to water bodies and clouds; Step 3: Judge potential fire points ; Step 4: Judging the absolute fire point; Step 5: Using the background information to judge the fire point; Step 6: Filtering out the noise point; Step 7: Filtering out the industrial fire point through the NDVI index; Step 8: Judging the fire point that affects the transmission line point, and output the final fire point position; this method has the following advantages: 1. Greatly reduces the false alarm rate of abnormally high temperature points; 2. Successfully identifies industrial fire points; 3. Greatly improves the accuracy of transmission line fire point identification Rate.