6results about How to "Solve the mechanical strength" patented technology

This invention discloses a method for preparing a novel ultra-high voltage high-performance composite insulating material, belonging to the field of composite insulating material preparation technology. The technical solution includes the following steps: S1, preparing a modified epoxy-silicone rubber composite resin matrix: 40-50 parts by weight of bisphenol A type epoxy resin (E-51) are placed in a reaction vessel, heated to 60-70℃, and continuously stirred at a stirring rate of 300-500 r / min. 10-15 parts by weight of terminal hydroxyl polysiloxane (molecular weight 5000-10000) are added, and the temperature is kept constant for 1.5-2 hours; subsequently, the system temperature is lowered to 40-50℃. The beneficial effects of this invention are: by setting up a resin matrix system of "terminated hydroxyl polysiloxane modified epoxy resin + nano-alumina / boron nitride composite reinforcement," the problem of imbalance between high voltage resistance and aging resistance in existing materials is solved. It exhibits significantly improved dielectric strength, greatly reduced dielectric loss, and excellent high and low temperature cycling performance, meeting the long-life operation requirements of ultra-high voltage equipment.

The utility model belongs to the field of power cables, and particularly relates to a high-tensile multi-layer stranded power cable, which comprises an inner-layer conductor. The surface of the inner-layer conductor is sleeved with an outer-layer stranded layer, the surface of the outer-layer stranded layer is sleeved with an interlayer buffer layer, the surface of the interlayer buffer layer is provided with a reinforced braid layer, and the surface of the reinforced braid layer is sleeved with a sheath layer; the inner-layer conductor is formed by twisting metal wires, the outer-layer twisting layer is formed by spirally winding metal wires on the outer surface of the inner-layer conductor, the twisting direction of the outer-layer twisting layer is opposite to that of the inner-layer conductor, the interlayer buffer layer covers the surface of the outer-layer twisting layer, and the sheath layer covers the interlayer buffer layer; through the collaborative structural design of the inner-layer conductor, the outer-layer stranded layer, the interlayer buffer layer, the reinforced braid layer and the sheath layer, the comprehensive improvement of the tensile strength, the bending fatigue life and the lightweight level of the cable is realized, the problems of poor mechanical strength and dynamic adaptability are solved, and the economical efficiency and the engineering applicability of the cable are improved.

The invention belongs to the field of hydrogen storage materials, and provides a hydride hydrogen storage material and a preparation method thereof. According to the preparation method, a block material is prepared through discharge plasma sintering forming by adopting a multi-level collaborative design of a reactive composite hydride phase formed by magnesium hydride and lithium borohydride, an ordered mesoporous carbon and hexagonal boron nitride composite carrier structure, an atomic layer deposition oxide coating layer, a niobium pentoxide and titanium hydride catalyst and a heat-conducting outer coating; the comprehensive performance that the reversible hydrogen storage mass fraction is 5.5-7.0 wt%, the capacity retention ratio after 50 times of circulation is larger than or equal to 90%, and the temperature gradient in the block is smaller than or equal to 10 DEG C / cm is achieved, and the multiple contradictions between the high hydrogen storage capacity and the block mechanical strength, between the oxide coating layer stability and the hydrogen diffusion rate and between the heat conduction uniformity and the structural integrity are solved. The method has a wide application value in a solid hydrogen storage system.

This invention discloses a method for preparing a corrosion-resistant, anti-icing, and wear-resistant superhydrophobic coating and the resulting product. The method uses graphite micropowder, alumina micropowder, ceramic fiber, nano-alumina powder, and methyl silicone resin as main raw materials, and ethanol as a dispersant. The materials are mixed according to a specific mass ratio to obtain a coating, which is then applied by spraying or dip coating and followed by heat treatment to form a superhydrophobic coating on different substrate surfaces. The product with the superhydrophobic coating exhibits excellent surface corrosion resistance, anti-icing, and wear resistance. The preparation method has many advantages, including simple process, low cost, environmental friendliness, and superior performance, and has broad application prospects in the field of material surface protection.

The present invention discloses a salt washing control system and method for high-salt soil. It includes a salt washing device, a salt return device, a residual water disposal device and a transmission feedback control device. The present invention realizes four functions of high-salt soil washing / salt return operation, water quality and soil quality data identification, network transmission, terminal display and control feedback by improving the salt washing device, the salt return device and the transmission feedback control device, and constructs a set of real-time visual and precisely controlled soil salt washing control system and method. The present invention can simulate the number of on-site salt washing, water consumption, and soaking time, and can also simulate the salt return scene in a high groundwater level environment. According to the design indicators, the number of salt washing, water consumption and soaking time of the device are precisely controlled, and the operation is convenient, simple and efficient. The present invention achieves a significant water-saving effect for the precise salt washing of high-salt soil. The high-salt soil is suitable as planting soil after salt washing, which can provide a reference for the resource utilization of coastal tidal flat mud.

The invention relates to an interphase connecting and assembling method of a three-phase combined transformer, and belongs to the field of transformer manufacturing, a stainless steel metal corrugated pipe is used as a main connecting structure among three single-phase transformers, a pipe joint is made of a low-magnetic steel material, and fixed plates which are symmetrically and oppositely arranged in pairs are welded on the inner wall of the pipe joint; an L-shaped wire clamp and plate-shaped wire clamps are mounted on the fixing plate, and a pair of buckling structures at the end parts of the plate-shaped wire clamps reliably clamp and fix a lead in the pipe joint; a pipe joint end flange and a metal corrugated pipe end flange are arranged at the joint of the pipe joint and the metal corrugated pipe respectively, fixing lugs are arranged on the peripheral edges of the pipe joint end flange and the metal corrugated pipe end flange, and a full-thread stud penetrates into one set of fixing lugs located on the same horizontal line. According to the invention, the matching problem in the in-place installation process of the transformer is reduced, the lead can be doubly fixed, and the problems of mechanical strength, electrical insulation margin and the like of an interphase connection structure are effectively solved.