8results about How to "Impact-resistant" patented technology

The utility model relates to the technical field of frequency converter insulation and heat dissipation, and discloses a high-power frequency converter insulation and heat dissipation structure which comprises a bottom plate, foot columns and side columns, the foot columns are fixedly connected to the four corners of the upper surface of the bottom plate, and the side columns are fixedly connected to the middle portions of the two sides of the upper surface of the bottom plate. According to the high-power frequency converter insulation heat dissipation structure, the bottom plate, the foot columns and the side columns are combined to form a frame structure used for bearing the heat dissipation assembly and the frequency converter, meanwhile, the rigidity of the whole structure is enhanced, and the frame structure is made of a steel material, can be directly used for grounding and has heat dissipation, impact resistance and lightning stroke resistance performance; the outer side vacant part of the frame body is filled with the side plates, the top of the frame body is sealed and covered with the top plate, the side plates and the top plate are made of metal materials such as copper with high heat conduction performance and high conductivity, the heat dissipation and signal shielding capacity can be achieved, meanwhile, the interior of each side plate is a hollow outer layer, heat dissipation fins and arc-shaped pieces are installed, the heat dissipation area can be increased, and the heat dissipation efficiency is improved. And the heat dissipation effect is improved.

The utility model discloses a kind of safety warning devices for mine safety, including mounting seat, the top of mounting seat is rotatably connected with warning light by bearing, detachably mounted with protective cover in the outside of warning light in the top of mounting seat, and the top of protective cover is installed with dust cover, the central shaft end portion of warning light base is passed through mounting seat and is fixedly connected with mounting frame, speaker is detachably installed in mounting frame, the bottom of mounting seat is symmetrically fixedly connected with fixed rod, and the bottom of fixed rod is fixedly connected with support plate, the bottom center of support plate is fixedly installed with driving motor, and the central shaft end portion of driving motor is fixedly connected with mounting frame by passing through support plate, the utility model has the beneficial effects: the utility model can realize the double warning of vision and hearing, and rotation of warning light and speaker can be controlled in warning, the coverage range and propagation effect of sound warning are enhanced, and protective cover is installed conveniently and quickly, and it is convenient to disassemble and replace, improve the maintenance efficiency of device.

The utility model discloses a tethered lighting unmanned plane with air duct heat dissipation structure relates to unmanned plane technical field, this tethered lighting unmanned plane with air duct heat dissipation structure, including unmanned plane main part. The utility model discloses through annular air duct, air duct inner wall several heat dissipation fins, air duct side surface LED lighting module and the setting of heat pipe heat transfer structure, when using, utilize the downwash airflow of propeller to flow through air duct heat dissipation structure, effectively take away the heat of LED lighting module and produce, be applicable to high -power, long -time lighting task, secondly adopt heat pipe and air duct initiative heat dissipation structure, need not additional fan just can realize high -efficient cooling, and, air duct material is high -strength aluminum alloy material, possesses anti -impact and falling protection ability, and this unmanned plane system has high heat dissipation efficiency, strong structural safety and strong environmental adaptability etc. Characteristics, be applicable to emergency lighting, disaster rescue, night rescue etc. Variety scene.

This invention relates to a high-temperature resistant foam ceramic microwave absorbing material and its preparation method, belonging to the technical field of microwave absorbing stealth materials. The preparation method of the high-temperature resistant foam ceramic microwave absorbing material includes the following steps: (1) mixing silicon carbide and calcium carbonate into a mixed powder; (2) mixing the mixed powder, borax, sodium silicate, potassium carbonate, polyvinyl alcohol, sodium carboxymethyl cellulose, and water to form a slurry; (3) impregnating a foam ceramic component with the slurry, followed by drying and sintering to obtain the high-temperature resistant foam ceramic microwave absorbing material. The foam ceramic microwave absorbing material prepared by this invention retains the original properties of the foam ceramic to the maximum extent, and exhibits excellent microwave absorption performance, especially since high temperature of 850℃ has no effect on its microwave absorption performance, indicating that the foam ceramic microwave absorbing material prepared by this invention has excellent microwave absorption performance and high-temperature resistance.

The invention relates to a semi-coke wastewater double-carbon-source biochemical treatment system and process, and the process comprises the following steps: pretreated semi-coke wastewater enters a front anoxic tank for denitrification reaction to remove COD and total nitrogen; effluent of the front anoxic tank enters an aerobic tank to be subjected to carbonization and nitration reaction, organic matters are removed, and ammonia nitrogen is converted into nitrite nitrogen and nitrate nitrogen; effluent of the aerobic tank enters a rear anoxic pretreatment tank for endogenous denitrification reaction; the mixed liquid in the rear anoxic pretreatment tank flows back to the front anoxic tank, and the reflux ratio is 400%-800%; and effluent of the post-anoxic pretreatment tank is subjected to mud-water separation and post-treatment to reach the standard and then is recycled. Mixed liquid backflow is carried out at the tail end of the rear anoxic pretreatment tank, the device has the advantages of being resistant to toxicity and impact, simple in technological process and low in operation cost, meanwhile, a large backflow ratio is adopted, nitrate nitrogen is removed, and meanwhile impact of biotoxicity on a biochemical system and inhibition of the biotoxicity on microorganisms are reduced.

The utility model discloses an anti-pulling aerial cable, which comprises a plurality of groups of fixing strips and a cable main body, the fixing strips are symmetrically arranged, an upper moving plate and a lower moving plate are slidably connected to two sides in the fixing strips in a staggered manner, and a plurality of groups of teeth are mounted on the surfaces of the upper moving plate and the lower moving plate. According to the utility model, the upper moving plate, the lower moving plate and the transmission gear are adopted, when wind blows subsequently, a transverse force is applied to the cable by the wind, the transverse force drives the upper moving plate or the lower moving plate to move, and the power is transmitted to the transmission gear through the upper moving plate or the lower moving plate, so that the transmission gear is driven to rotate; the transmission gear rotates to reversely drive the lower moving plate or the upper moving plate connected with the transmission gear, at the moment, the transverse force and the opposite force can be offset, the cable can be in a stable state, the use effect of the cable in the windy weather is improved, the cable can be used for a longer time, and the service life of the cable is prolonged. The device has the advantage of impact resistance.

The utility model relates to the technical field of core drilling, especially to a gearbox for core drilling machine. The gearbox comprises a box body, an input shaft, an intermediate rotating shaft, an output shaft and a shift fork mechanism. The input shaft is provided with a driving gear. The intermediate rotating shaft is provided with a driven gear, a clutch gear and an inner-outer connecting gear in sequence from top to bottom. The driving gear and the driven gear are in mesh with each other. The clutch gear rotates with the intermediate rotating shaft and moves up and down along the axial direction of the intermediate rotating shaft. The inner surface of the inner-outer connecting gear towards the clutch gear end is provided with internal teeth, and the outer surface of the inner-outer connecting gear away from the clutch gear end is provided with external teeth. The output shaft is provided with a second gear and a first gear in sequence from top to bottom along the axial direction. The shift fork mechanism drives the clutch gear to move up and down along the axial direction of the intermediate rotating shaft. The gearbox can switch the output shaft between low-speed rotation and high-speed rotation, so that the drill rod can meet various working requirements of low-speed heavy load and high-speed light load, and the working range of the drilling machine is improved.

This invention discloses a nano-deposited, heavy-duty anti-corrosion graphene composite nano-coating, which is composed of the following components by weight: 66-82 parts of a polyimide-toughened polyphthalonitrile resin composition solution; 1-2 parts of nano-calcium silicate; 1-2 parts of nano-silicon nitride; 1-2 parts of graphene; 3-5 parts of 1,3,5-tris(trimethoxysilylpropyl)isocyanurate; 2-3 parts of lead powder; 1-2 parts of chromium carbide powder; 1-2 parts of tungsten powder; 1-2 parts of cobalt powder; 1-2 parts of silicon carbide; 1-2 parts of tungsten carbide powder; 1-2 parts of nickel powder; 1-2 parts of boron powder; 1-2 parts of rhenium powder; 1-2 parts of zirconium carbide powder; and 1-2 parts of zirconium oxide powder. After baking, cross-linking, and curing, the coating forms a powder coating with properties such as high temperature resistance, resistance to rapid heating and cooling, fire resistance and scorching prevention, heat insulation and heat dissipation, resistance to damp heat, salt spray resistance, impact resistance, and low friction.