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According to the biquaternary ammonium salt modified silica sol and the preparation method and application thereof, the triple targets of stability improvement, broad-spectrum efficient bacteriostasis and catalyst crystallinity breakthrough are achieved through the modification effect of biquaternary ammonium salt, the requirements for long-period use of the catalyst, bacteriostasis in complex scenes and efficient dispersion of active components are met, the crystallinity of the supported catalyst reaches 92% or above, and the service life of the supported catalyst is prolonged. Inactive impurities are reduced, and the catalytic performance is improved.

The application discloses a battery-grade material preparation device and an operating method thereof, and relates to the technical field of battery-grade material preparation.The application comprises a processing tank body, a supporting seat, a feeding pipe, a discharging pipe, a stirring rod, a driving motor, a conveying pipe, a limiting baffle, a rubber sealing sleeve, an air bag body and a pneumatic valve, and the conveying pipe is sent into the feeding pipe by installing the conveying pipe, the limiting baffle, the rubber sealing sleeve, the air bag body and the pneumatic valve, the limiting baffle is in contact with the top end of the feeding pipe, compressed air is introduced into the pneumatic valve, the air bag body in the rubber sealing sleeve is inflated, the rubber sealing sleeve fills the gap between the conveying pipe and the feeding pipe, sealing is completed, dry gas is sent into the processing tank body through the conveying pipe, the inside of the processing tank body is subjected to drying treatment, and sealing can be adapted to feeding pipes with different diameters.

The utility model discloses a kind of green assembly type building wallboards, aluminium silicate board is equipped with heat protection subassembly, polyurethane insulation board is inlaid in heat preservation hole, aluminium hydroxide powder bag is inlaid in fire tank, aluminium silicate board other side is bonded with outer reinforcing plate, heat conducting plate is inlaid in heat conducting hole, heat conducting plate edge is evenly provided with pressure relief hole, heat conducting plate and fire tank diameter are same, when the utility model occurs fire, heat conducting plate transmits heat to aluminium hydroxide powder bag, aluminium hydroxide powder bag breaks, then, the hydrogen oxide aluminium powder that aluminium hydroxide powder bag flows out will decompose under high temperature, produce a large amount of water vapor, reduce the temperature of inner reinforcing plate and outer reinforcing plate while preventing flame close, reduce the probability that wall body cracks and damages due to high temperature, and only need to disassemble heat conducting plate when repairing later, after supplementing new aluminium hydroxide powder bag, it can be bonded with decorative veneer, wall body is better in fire resistance, safer and more reliable.

The invention relates to the technical field of water treatment membrane separation, and particularly discloses a pollution-resistant monovalent and divalent ion separation nanofiltration membrane as well as preparation and application thereof. The pollution-resistant monovalent and divalent ion separation nanofiltration membrane comprises a supporting layer, a charged middle layer and a charged separation layer which are sequentially stacked, the material of the charge middle layer comprises polydopamine and / or polyethyleneimine; the charge separation layer is prepared by interfacial polymerization of raw materials including an oil-phase reactant and a water-phase reactant; the oil-phase reactant comprises a compound containing an acyl halide functional group; inorganic nanoparticles are also added into preparation raw materials of the charge separation layer, and the inorganic nanoparticles are prepared from the following components in parts by weight: a graphene oxide two-dimensional lamellar material, a mesoporous silica porous material and a titanium dioxide metal oxide. The pollution resistance of the nanofiltration membrane can be further improved, so that the pollution-resistant monovalent and divalent ion separation nanofiltration membrane with a more excellent and stable monovalent and divalent salt ion separation effect is obtained.

The application discloses an organic annulus protection fluid for oil and gas wells and a preparation method thereof. The annulus protection fluid comprises 0.01-3wt% of active polymer, 0.1-5wt% of oxygen scavenger, 0.1-2.5wt% of bactericide, 0.1-0.5% of pH regulator, and the rest is water. The active polymer in the annulus protection fluid is copolymerized from N-acryloyl morpholine and acrylate compounds. The annulus protection fluid has good chemical stability, can effectively delay the corrosion rate of the casing and the oil and gas pipeline, solve the problems of fouling, bacterial reproduction, under-deposit corrosion and plugging caused thereby, and reduce the pressure difference between the oil and gas pipeline and the annulus. The system is suitable for annulus protection of oil and gas wells, and is especially suitable for high-acid and high-sulfur oil and gas wells.

The invention discloses a left-right swing type intelligent electric power cabinet anti-bird device, and relates to the technical field of electric power cabinets. The device comprises a cabinet body, an L-shaped plate is fixedly installed above the back of the cabinet body, a driving rod is rotatably installed on the front face of the L-shaped plate in a penetrating mode, an elastic telescopic plate is fixedly installed on the outer wall of the driving rod in a penetrating mode, a U-shaped groove is formed in the bottom of the telescopic end of the elastic telescopic plate, and a cambered surface baffle is fixedly installed at the top of the elastic telescopic plate. According to the bird repelling device, the cambered surface baffle swings in a reciprocating mode through the driving rod so as to complete bird repelling work, birds are distinguished to adapt to noise type repelling through dynamic repelling, and therefore the nesting phenomenon is generated, in the swinging process of the cambered surface baffle, the top cambered surface design increases the bird stopping difficulty, and then the bird repelling effect is optimized; meanwhile, the top of the cambered baffle is cleaned by the scraper, so that the service life of the cambered baffle is prevented from being shortened due to dirt erosion.

The utility model discloses a portable test strip scanning reading instrument, and relates to the technical field of test strip scanning reading instruments. The reading instrument comprises a reading instrument body, the bottom of the reading instrument body is fixedly connected with a sealing assembly, the bottom of the sealing assembly is fixedly connected with a dustproof assembly, the sealing assembly comprises a control shell, the top of the control shell is fixedly connected with the reading instrument body, and the right side of an inner cavity of the control shell is movably connected with an adjusting mechanism. According to the utility model, the movement of the sealing cover is controlled by the handle through the sealing assembly, the interface on the surface of the reading instrument body is sealed through the sealing cover, and then the fixed toothed plate is driven to be meshed with the adjusting toothed plate through the adjusting mechanism to limit and fix the sealing cover, so that dust in a granary environment can be effectively isolated from invading; dust is prevented from being attached to the surface of the scanning probe, stability and accuracy of detection signals are ensured, meanwhile, the risk that internal elements of equipment are polluted by dust is reduced, and the service life of the equipment is prolonged.