34results about How to "Achieve extinguish" patented technology

A silver strip for a fuse protector comprises a silver alloy on the outer layer and pure silver at the core part, and the silver alloy is silver-copper alloy powder formed through mixing of the components, by mass ratio, of 0%-10% of CdO powder and 0%-2.5% of Ni powder and the balance of 70%-75% of Ag and 25%-30% of Cu; the preparation method comprises the following steps: the raw materials are weighed according to the mass ratio and loaded into a ball mill for high energy ball milling; the uniformly ball-milled raw material fine powder is put into an annular steel mold, and a hollow blank isformed through suppressing of an isostatic press; the pure silver is taken and smelted by vacuum smelting equipment, and a silver ingot is casted in the mold; the silver ingot and the hollow blank areassembled and placed into a vacuum sintering furnace for reaction and burning into a billet, then the round billet is squeezed into a sheet blank, the sheet blank is subjected to multi-pass rolling,and the smelted silver strip with self-arc-extinguishing capacity can be prepared; the silver strip for the fuse protector has excellent electrical conductivity, self-arc-extinguishing capacity, suitable smelting point and excellent processability.

The present invention is a kind of anti-jamming device for frictional automobile driving, which comprises an electric control unit ECU of the automobile, the input interface of the electric control unit ECU is connected with a piezoelectric sensor, an infrared sensor and a speed sensor, and the infrared sensor is arranged in the driver's cab area Inside, it is connected with the single-chip microcomputer input terminal of the electronic control unit ECU, and the piezoelectric sensor is arranged at the steering wheel at the upper end of the steering column, and is connected with the single-chip microcomputer input terminal of the electronic control unit ECU, and the single-chip microcomputer of the electronic control unit ECU The output end of the solenoid valve is connected to the solenoid valve, and the solenoid valve is connected to the hydraulic cylinder. The piston of the hydraulic cylinder of the hydraulic cylinder is connected to one end of the friction plate in the friction locking mechanism, and the friction plate is arranged on the connection with the steering wheel. On the steering shaft, tension is provided by a spring. The frictional car driving anti-interference device can lock the steering column, turn on the hazard warning lights, and link the braking system to assist the driver to control the direction when an irrational passenger pulls and snatches the steering wheel. driving safety.

The invention belongs to the field of safety production, and particularly relates to a fire extinguishing system of a hydrogen pipeline flange joint. The fire extinguishing system comprises a nitrogeninjection device used for injecting nitrogen to the flange joint in the radial direction of the flange, a fire foam injection device used for injecting fire foam to the flange joint in the radial direction of the flange, a temperature monitoring device used for monitoring the temperature above the flange joint, and a control device used for controlling the nitrogen injection device and / or the fire foam injection device to start when the monitored temperature detected by the temperature monitoring device is greater than a preset value. The fire extinguishing system can monitor and automatically extinguish a hydrogen leakage fire at flange joint in real time. A double-extinguishing agent (nitrogen and fire foam) is matched with the system to use, so that double-protection is provide for fire extinguishing, and the success rate of fire extinguishing is improved.

The invention belongs to the field of safety production, and in particular relates to a fire extinguishing system at a flange connection of a hydrogen pipeline. The system comprises: a nitrogen injection device for injecting nitrogen to the flange connection along the radial direction of the flange; Fire-fighting foam spraying device for spraying fire-fighting foam to flange joint; temperature monitoring device for monitoring temperature above flange joint; and control device for monitoring temperature of said temperature monitoring device>preset Control the nitrogen injection device and / or the fire-fighting foam injection device to open if the value is set. The system provided by the invention can monitor and automatically extinguish the hydrogen leakage and fire at the flange connection in real time, and the system is matched with dual extinguishing agents (nitrogen, fire-fighting foam), which can provide double protection for extinguishing and improve the success rate of extinguishing.

The invention discloses a miniature automatic fire door for a cable tunnel. A door frame is arranged on the outside of the fire door body, grooves are arranged on both sides of the top middle of the door frame, the inside of the groove is filled with fire extinguishing agent, and a glass cover is installed on the outside of the groove , the upper and lower ends of both sides of the door frame are equipped with fixing plates, the two sides of the inside of the door frame are provided with a storage chamber, the top of the storage chamber is provided with a chute, the inside of the storage chamber is installed with a door leaf, and the lower left corner of the inside of the door frame is installed with an R280 motor. One end of the R280 motor is fixedly connected with a rotating shaft, and one end of the rotating shaft is installed with a driving gear. Connection, simple operation, convenient installation and disassembly, when the glass cover is damaged after a fire, it can also be replaced, simple and practical, and reduces the later maintenance cost of the fire door body.

The invention discloses a zero-suppressing interference spectrometer based on coherent dispersion technology, aiming to solve the technical problem that it is difficult to obtain a clearer planetary spectrum in the prior art, resulting in the inability to perform spectral characterization of faint planets. The invention includes A light source unit, an interferometer, a dispersion unit, and a photodetector are arranged in sequence along the optical path; the light source unit emits collimated incident light; the interferometer divides the incident light into a first outgoing light and a second outgoing light; there are two dispersion units, The first outgoing light and the second outgoing light are respectively decomposed into spectra to form two interference fringes; there are two photodetectors, and the two interference fringes are respectively received to obtain two interference fringe images. The zero-suppressing interference spectrometer based on the coherent dispersion technology of the present invention can not only be used to detect planets, but also can obtain clearer planetary spectra, and perform spectral characterization on faint planets.

The invention relates to a road lighting technology, in particular to an LED steel lamp control method. The method realizes the control of LED street lamps by an LED street lamp controller. The methodcomprises the following steps of: receiving the control of a higher-level system, controlling a group of LED street lamps in a same region, transmitting information to the LED street lamp controllerby the ZigBee communication mode when the LED street lamps work abnormally, and using the LED street lamp controller to feed back the information to a control center through a GSM network or a GPRS network. The LED street lamp control method can lead a working staff to directly operate the LED street lamp controller for realizing lighting, off-lighting, detection and other operations of the LED street lamps in the region when the GSM or the GPRS network fails. The invention provides the high-efficiency LED street lamp control method which can simultaneously control a group of LED street lampsand realize automatic control.

The invention discloses a system for automatically extinguishing fire in a long tunnel and an extinguishing method thereof. The system comprises an emergency pipeline, a water tank, a PLC (programmable logic controller) and more than three single-zone extinguishing units, wherein the PLC is connected with each single-zone extinguishing unit via control cables respectively; each single-zone extinguishing unit comprises a nozzle, a pure-water high-pressure pump and an ultrahigh-pressure pipeline; the pure-water high-pressure pump is capable of outputting high-pressure water flow with the pressure intensity being higher than 14MPa; and the nozzle is a water-mist nozzle combining multiple nozzles. The method comprises the following steps: detecting; giving a fire alarm; and controlling the water supply, mist-spraying, backwater and the like by the PLC. The tiny fog droplets formed by the ultrahigh-pressure water flowing through the dedicated water-mist nozzle is adopted to extinguish fire, the tiny fog droplets can be rapidly vaporized when meeting the high-temperature flame and the volume thereof can expand by more than 1,700 times so as to greatly reduce the oxygen concentration of a protection zone and have the strong effects of cooling by vaporization and suffocation by oxygen isolation; and meanwhile, the fog droplets can surround the fire source and further prevent heat radiation and diffusion, thereby achieving the purpose of rapidly extinguishing fire.

The invention is an automatic monitoring device for navaid light state. It includes dimmer powering primary loop, primary loop monitor and light position monitor in each light pit, the primary loop monitor is arranged with a receiving circuit, the light position monitor is arranged with a ejecting circuit. Its character lies in: there has a emitting circuit in the primary monitor, which includes isolating transformer B0, chopped wave signal ejecting circuit, dimmer reset circuit, chopped wave gating circuit, pulse isolating circuit, control instruction counting and coding N circuit, power industry frequency synchronous CP circuit and control switch K; the light position monitor is arranged with a receiving circuit, which including isolation transformer BMN, special transformer BZ, currentmutual inductor Hn, light position monitor power, follow-up peak sampling circuit, function switch circuit, delay circuit, it realizes the double-direction transmission and control of light position and light station with a long distance.