7results about How to "Long-lasting and stable performance" patented technology

The invention discloses an online polishing and curling integrated device and process for a magnesium alloy plate strip. The device is located between a finish rolling mill and a crimping machine and comprises a polishing groove body, a grading polishing roller set arranged above the groove body, a tension control system and a constant tension crimping mechanism. Special weak acid polishing liquid is supplied to the polishing area through the spraying system, mechanical-chemical collaborative polishing is achieved under the spraying wetting condition, and the problems caused by roller body immersion are avoided. The tension system performs hierarchical closed-loop control according to plate thickness, and the crimping mechanism is linked to keep tension constant. The process comprises online collaborative polishing and optional electrolytic polishing. Polishing and curling aiming at the characteristics of the magnesium alloy are integrated on line, the problems that magnesium chips are generated through off-line grinding, and continuous production is difficult are solved, the output of the magnesium chips is smaller than 0.002 kg / m < 2 >, the surface roughness Ra reaches 0.15-0.8 micrometer, the production efficiency is improved by 40% or above, and the method is suitable for continuous production of wide plate strips of 1600-1800 mm.

The invention relates to a SF6 gas chamber constant volume filling and discharging measuring device, which belongs to the technical field of SF6 equipment and solves the problem of how to design a device that can accurately measure the gas volume in the SF6 gas chamber when the pressure in the SF6 gas chamber is low or high. When the device of the invention is used to measure the gas volume in the SF6 gas chamber of an electrical device, when the pressure in the SF6 gas chamber is high, the deflation measurement is performed, and when the pressure in the SF6 gas chamber is low, the inflation measurement is performed. The measuring device cannot measure the pressure in the SF6 gas chamber in two situations at the same time. It has a wide range of applications. A constant volume filling and discharging gas tank is used to replace a weighing device, and a set of temperature and pressure sensors and a control valve group are used to realize temperature and pressure measurement under different conditions. There is no need to carry a weighing device to the site to weigh the gas cylinder. The device has a simple structure and is easy to install.

The application provides a kind of weather-resistant optical functional coating nanoparticles and its preparation method and application, belong to the field of coating.The nanoparticles include: inner core, the inner core is near-infrared reflective material;The near-infrared reflective material uses metal oxide nanoparticles with near-infrared reflective function;First wrapping layer, the first wrapping layer is silica intermediate layer, which wraps the inner core;Second wrapping layer, the second wrapping layer is alumina passivation layer, which wraps the silica intermediate layer.The nanoparticles are used as the functional filler of weather-resistant optical functional coating.The application provides a kind of core-shell structure nanoparticles, by introducing specific passivation layer, while retaining the near-infrared reflective function of inner core material, fundamentally eliminate its photo-catalytic damage to organic matrix, so as to obtain long-acting stability, high visible light transmittance, excellent spectral selectivity and weather-resistant coating.

The application discloses a kind of MXene-based composite wave-absorbing materials and preparation method thereof, water-based electromagnetic functional color paste and preparation method and application, the MXene-based composite wave-absorbing material provided in the application is with two-dimensional layered MXene nanosheet as carrier, and Fe3O4@Ag core-shell structure nanosphere is loaded on the surface and interlayer of two-dimensional layered MXene nanosheet.The above-mentioned MXene-based composite wave-absorbing material is by electrostatic self-assembly process, Fe3O4@Ag core-shell structure nanosphere is loaded on the surface and interlayer of two-dimensional layered MXene nanosheet, the composite of both is realized.In addition, the application further provides water-based electromagnetic functional color paste comprising the above-mentioned composite wave-absorbing material, the color paste shows excellent storage stability and outstanding electromagnetic shielding and absorption performance, and can be suitable for a variety of coating processes.

A kind of SF 6 Air chamber weighing filling and deflation measuring device, belonging to SF 6 In the field of equipment technology, how to design a SF with simple structure and easy installation 6 Gas chamber weighing filling and deflation measuring device, accurately measuring the original SF in the gas chamber of electrical equipment 6 Gas volume; Use this device to measure the SF 6 When measuring the amount of gas in the gas chamber, when SF 6 When the pressure in the air chamber is high, deflation measurement is performed. 6 When the pressure in the air chamber is low, the inflation measurement is performed; the measuring device cannot measure the SF in two situations at the same time 6 The pressure in the air chamber; it has a wide range of applications, simple device structure and easy installation.

The application relates to the technical field of battery packs, in particular to an anti-loose electrical connection battery pack. The technical scheme comprises a shell, an internal battery pack and a liquid cooling channel. The innovation is that a hydraulic locking module is integrated into the connecting part of the copper bar leading out of the shell. The module fills transmission medium in the flow cavity of the limiting ring, and controls the in-out of the plug by using a driving mechanism, so as to block or release the rotating path of the blocking block linked with the nut. When the plug blocks the flow cavity, a hydraulic lock is formed, and the nut is completely prevented from loosening; when the plug exits, the nut can be normally screwed. The application fundamentally solves the problem that the electrical connection is prone to loosening in a vibrating environment, is high in safety and convenient in operation and maintenance.

The invention discloses a switch, and relates to the technical field of switches, the switch comprises an upper shell and a lower shell arranged at the lower end of the upper shell, the upper shell and the lower shell are tightly connected to form an internal cavity, the upper shell is provided with a first heat dissipation assembly, and the lower shell is provided with a second heat dissipation assembly; a circuit board assembly is arranged in the internal cavity; a first heating device and a second heating device are arranged in the inner cavity, and the first heating device is electrically connected with the circuit board assembly and is thermally coupled with the first heat dissipation assembly; the second heating device is electrically connected with the circuit board assembly and thermally coupled with the second heat dissipation assembly, and heat dissipation is achieved through the second heat dissipation assembly. The first region and the second region are isolated from each other in the interior chamber by a physical space. The main heating source is arranged in the two cavities with physical isolation, and the independent heat dissipation paths integrally formed with the shell are configured for the two cavities respectively, so that partitioned heat dissipation is realized, and long-term temperature stability of the equipment under high load is ensured.