16results about How to "Improve self-stability" patented technology

The invention relates to a perfluoro wide-temperature electrolyte for a lithium battery and application thereof, the wide-temperature electrolyte comprises a lithium salt, an additive and a plurality of perfluoro mixed solvents, the electrolyte capable of stably working in a wide temperature range (-80-80 DEG C) is successfully constructed, and the excellent electrochemical performance of the lithium battery at the wide temperature is realized. The electrolyte additive disclosed by the invention mainly comprises one or more of hexafluoroisopropoxy cyclotriphosphazene, 3-(2, 2, 2-trifluoroethoxy) propionitrile, 3-(2, 2, 2-trifluoroethoxy) butyronitrile, 3, 4-fluoroethylene sulfate and 4-trifluoromethyl-ethylene sulfate, and the fluorine-containing additive is good in flame retardant effect, moderate in viscosity, good in system compatibility, good in corrosion resistance and good in corrosion resistance. And a protective film can be formed on the surface of the positive electrode of the lithium battery, so that the high-pressure and high-temperature cycle performance of the battery is improved, the electrochemical performance of the battery is not influenced at all, the self-extinguishing time of the electrolyte is obviously shortened, the flame retardant property and the conductivity are excellent, the overcharge resistance of the lithium ion battery is also obviously improved, and the safety performance of the battery is improved.

The utility model discloses an ecological protection device for a side slope containing easily-weathered rocks, which comprises a side slope body, a plurality of lattice beams are poured on the side slope body, anchor rods are arranged at the connection positions of vertex angles of adjacent lattice beams, the anchor rods are embedded into the side slope body, hooks are fixed on the inner sides of the lattice beams, and ecological bags are built in the lattice beams. The ecological bag is covered with a net piece, and the edge of the net piece is hung on the hook and detachably connected with the hook 5. The meshes are fixed to the hook hanging pieces of the lattice beams, the stability of the ecological bags is improved, a detachable device composed of the meshes and the hook hanging pieces facilitates maintenance and replacement of ecological bag vegetation in the lattice beams in the later period, the side slope maintenance cost is reduced, the double effects of reinforcing side slope rock-soil bodies and greening ecology are achieved, and the side slope protection effect is improved. The slope protection structure belongs to green ecological protection, is wide in application range, can be applied to sandy soil, soil slopes and the like with steep rock slope ratios, and particularly has remarkable advantages in slope protection of easily-weathered rock slopes.

The utility model belongs to the field of artificial fish reefs, and provides a rectangular pyramid artificial fish reef prefabricated part with asymmetrical staggered holes, which comprises a bottom plate and a rectangular pyramid pedestal. The top of the bottom plate is fixedly connected with the rectangular pyramid pedestal, the rectangular pyramid pedestal is of a rectangular pyramid structure with an inner cavity, the rectangular pyramid pedestal comprises a top surface and four side surfaces, the four side surfaces are inclined surfaces, and the tops of the four side surfaces are fixedly connected with the top surface; through holes are formed in the side faces, and the through holes in the two opposite side faces are arranged in a staggered mode. The holes with different hole diameters are formed, the inside of the reef body is kept communicated with a river water body, and the reef can adapt to the water level variation of a mountain river and meet the requirement for free entering and exiting of fishes with different body heights.

The utility model discloses a double-rolling-brush acarus killing instrument, which belongs to the field of cleaning electric appliances, solves the problem that a user uses the acarus killing instrument with great effort, and adopts the technical scheme that the acarus killing instrument mainly comprises a machine body, a control circuit board, an air suction motor, a fan, a garbage can, a first motor, a first rolling brush, a second motor and a second rolling brush, the control circuit board is electrically connected with and supplies power to the air suction motor, the air suction motor is used for driving the fan to rotate so that negative pressure can be generated in the dustbin, the first motor is used for driving the first rolling brush, the second motor is used for driving the second rolling brush, and the first rolling brush and the second rolling brush are distributed front and back. The first motor and the second motor are distributed on the other side of the center face, and the air suction motor is located between the first motor and the second motor in the front-back direction of the machine body. The utility model is mainly used for enabling a user to use more conveniently in a more labor-saving manner.

The application provides a variable-span support device for a through-type movable formwork and a displacement method thereof, and belongs to the technical field of highway bridge construction. A plurality of main beam support point beams are arranged in the inner cavity of the main beam of the formwork, serving as force bearing support points of the main beam of the formwork and being used for variable-span support; and longitudinal slides are arranged between adjacent main beam support point beams, the longitudinal slides serving as connecting channels between the adjacent main beam support point beams, so that the suspended double-support-point self-balancing support device at the bottom of the main beam support point beam can slide from one main beam support point beam to another main beam support point beam along the longitudinal slide. The component structure of the application is simple, and all the components are installed in the inner part of the main beam of the formwork, effectively reducing the support height of the main beam of the formwork and increasing the stability and construction safety of the formwork; when the support point is converted, the crane is not needed for hoisting and transporting, and only a tow chain is needed to realize the sliding displacement of the support device.

The invention discloses modified waterproof coiled material asphalt and a preparation method thereof, and belongs to the technical field of waterproof coiled material asphalt. In the prior art, the compatibility between a nanometer material and asphalt and other oily materials is poor, so that the nanometer material is peeled off from the waterproof coiled material, the high-temperature and low-temperature performance of the waterproof coiled material is influenced, the deformation of the waterproof coiled material is increased along with the temperature, and the coiled material cracks. The modified nano-silica modified asphalt comprises the following raw materials in parts by weight: matrix asphalt, petroleum resin, an SBS polymer, a solubilizer and modified nano-silica. Wherein the modified nano silicon dioxide is modified by the following steps: 1) carrying out low-temperature plasma surface treatment on nano silicon dioxide; the preparation method comprises the following steps of (1) preparing nano silicon dioxide, (2) uniformly mixing and stirring the nano silicon dioxide and naphthenic acid dispersion liquid, and reacting for 100-200 minutes at 70-80 DEG C. (3) separating, washing and drying a product to obtain the modified nano silicon dioxide. The compatibility of a nano material and asphalt is good, and the waterproof coiled material is good in high and low temperature performance, adhesion, stripping resistance and cracking resistance.

The present application relates to the field of pharmaceutical powders, and in particular to a cholecalciferol powder and a preparation method thereof. The raw materials of the cholecalciferol powder include, by mass percentage, 0.05-1% cholecalciferol, 0.1-2% flow aid, 40-60% coating material, 20-30% carrier particles, 1-5% functional additives, and solvent to supplement the remainder. The cholecalciferol powder prepared in the present application can not only ensure that the content and uniformity of cholecalciferol therein meet the standards, but also ensure that it has excellent antioxidant properties and water-resistant and hygroscopic properties, and has extremely strong self-stability in use, transportation and storage, and has a very excellent market prospect.

The utility model discloses an unmanned aerial vehicle maintenance toolbox convenient to carry, which comprises a toolbox main body and lockable moving wheels, and the top surface of the toolbox main body is provided with an accommodating groove. According to the tool box, the ground nails and the fixing seats are adopted, in the actual use process, after the tool box is moved to a designated position, the whole device can be fixed through contact between the ground nails and the ground, the moving wheels of the device are of a lockable structure, the stability of the device in the use process can be further improved, and on the basis, the tool box is convenient to use. Supporting legs of the unmanned aerial vehicle can be clamped and fixed through clamping plates in fixing bases at the tops of adjusting discs, the fixing work of the unmanned aerial vehicle is improved, the situation that the unmanned aerial vehicle slides off during maintenance, and secondary damage is caused is avoided, the device can enrich the overall fixing types through different fixing structures, the fixing effect is synchronously improved, and the device is convenient to use. And the device has the advantages of being good in use effect and high in stability.

This invention relates to the field of flame-retardant composite materials, specifically to flame-retardant composite materials based on the synergistic reinforcement of talc and graphene sheets and their applications. It addresses the problem that existing polymer materials struggle to simultaneously achieve reinforcement, flame retardancy, and lightweighting, and require large quantities of high-performance additives. The process involves first mixing talc sheets, graphene, a composite flame retardant, and a dispersant in a high-speed mixer, then cooling to room temperature to obtain a premix. A polymer matrix is ​​then added to a twin-screw extruder. The premix and other auxiliary additives are added through a side feed port, melt-blended, water-cooled, air-dried, and pelletized to obtain composite material particles. These particles are then vacuum-dried and injection-molded to obtain the flame-retardant composite material. The flame-retardant composite material possesses excellent flame-retardant and mechanical properties, exhibiting outstanding overall performance and being more suitable for industrial production.

According to the automatic assembly coding equipment and method for the cryopreservation tubes, the automatic production process from feeding to collecting of the cryopreservation tubes is achieved, and the consistency and accuracy of the coding effect are ensured. The equipment comprises a feeding device, a bearing table, an assembling area, a laser etching area, a collecting device, a plurality of visual detection mechanisms and a plurality of sensors, wherein the visual detection mechanisms and the sensors are used for detection and control. And a rotary assembly mechanism in the assembly area adopts a multi-stage columnar suction nozzle and a spherical lug boss, so that the assembly stability is improved. The laser etching area is provided with two laser coding machines which are used for coding the side face and the bottom face of the pipe body respectively. The collecting device achieves automatic sorting and storage of the cryopreservation tubes through a sorting mechanism and a conveying belt. In addition, the quantitative relation between assembly and storage is limited, the adjusting step before code printing is optimized, the production efficiency and the product consistency are improved, and the device is suitable for large-scale production of cryopreservation tube consumables.

The utility model discloses a gasoline engine VTG supercharger assembly integrated test bench relates to gasoline engine spare part test equipment technical field. The utility model discloses a bottom plate is provided with damping assembly at the top of bottom plate, and the top of damping assembly is provided with bearing frame. The utility model has efficient longitudinal damping buffering capacity and stability guarantee mechanism, when the supercharger produces longitudinal vibration in high speed or working condition switching test, and bearing frame will move up and down with vibration, and simultaneously drives the stable rod extrusion damping spring, buffer plate extrusion damper, and the longitudinal vibration is directly buffered through the cooperation of both, avoids vibration transmission to the main body of test bench and ground, improves the stability of test bench itself, prevents the resonance with surrounding equipment, guarantees the normal operation of surrounding equipment, and the limiting sleeve of bearing frame both sides moves along the surface of side plate, further strengthens the overall stability of bearing frame, avoids the test bench shaking problem caused by vibration.

The invention provides a high underground water level spaced hollowed-out reverse vertical shaft structure and a construction method thereof.The high underground water level spaced hollowed-out reverse vertical shaft structure comprises a waterproof curtain, a lock mouth ring beam, vertical supporting well walls, horizontal supporting well walls and a hollowed-out well wall, the waterproof curtain is arranged on the outer side of the well wall, and the horizontal supporting well walls and the vertical supporting well walls are alternately arranged; the hollowed-out well walls are arranged at intervals at the vertical supporting well walls, the hollowed-out well walls, the vertical supporting well walls and the hollowed-out well walls form a frame structure. The well wall is composed of the vertical supporting well wall, the horizontal supporting well wall and the hollowed-out well wall, the vertical supporting well wall, the horizontal supporting well wall and the hollowed-out well wall form a frame structure, and the good soil retaining effect is achieved; the waterproof curtain is arranged on the outer side of the shaft wall, so that the self-stabilization capacity of the soil body on the side wall of the vertical shaft can be improved while the waterproof effect is achieved, and the construction safety of the reverse vertical shaft during downward excavation of the soil body is guaranteed. The hollowed-out well wall is undisturbed soil on the side wall of the vertical well, supporting and retaining measures are not needed by utilizing the self-stabilization capacity of a soil body and the restraining effect of the vertical supporting and retaining well wall and the horizontal supporting and retaining well wall, and therefore the well wall concrete work amount is saved.

The invention belongs to the field of underwater naval vessels, and particularly relates to an underwater unmanned vehicle. In order to enable the underwater unmanned vehicle to sail at a high speed and have good self-stability, the invention discloses the underwater unmanned vehicle. The underwater unmanned vehicle comprises a front cabin section, a steering section and a rear cabin section, the steering section comprises a front connecting piece and a rear connecting piece, the front connecting piece and the rear connecting piece are provided with a front through hole and a rear through hole respectively, the front cabin section is provided with at least two jet flow nozzles, a cavitation generator is arranged in the rear cabin section and connected with an air guide pipeline, and the air guide pipeline is connected with the jet flow nozzles. The front end of the gas guide pipeline is connected with the jet flow nozzles, so that when the cavitation generator is started, high-pressure gas in the cavitation generator is sprayed out from all the jet flow nozzles to form supercavitation bubbles, and the maximum navigational speed of the unmanned underwater vehicle is increased. By postposition of the cavitation generator, the distance between the center of mass and the center of buoyancy can be increased, so that the self-stability of the underwater unmanned vehicle during underwater navigation is improved.

The invention provides a self-adjusting loudspeaker frame structure, and relates to the technical field of loudspeakers, the self-adjusting loudspeaker frame structure comprises a frame main body, the lower end part of the frame main body is fixedly connected with three groups of rectangular blocks, the three groups of rectangular blocks are internally and rotatably connected with straight gears, the three groups of straight gears are internally and threadedly connected with threaded rods, and the upper end parts of the three groups of threaded rods are fixedly connected with connecting seats; when the device is used, the inner gear can be screwed by holding the pull rod, the straight gear is meshed and driven to rotate in the rotation process of the inner gear, and the threaded rod in threaded connection is driven to rotate in the rotation process of the straight gear. The threaded rod drives the connecting base to adjust the placing height, the connecting base is sleeved with the sleeve through the plug pin, when the position of the threaded rod is adjusted, the connecting base pulls the sleeve to slide so as to adjust the extending length of the damping rod, the applicability of the device can be improved, and personalized setting of a user is achieved.

The application provides a tunnel excavation selection method considering the relationship between the initial stress direction and the tunnel axis, and relates to the technical field of tunnel construction.The application comprises the following steps: firstly, performing engineering geological survey along the tunnel to be excavated to obtain the stress direction along the tunnel; and then taking the spatial relationship between the maximum principal stress direction and the tunnel axis as a reference standard to determine the partial excavation method.The application verifies that the selection principle of the excavation scheme has a strong control effect on the deformation of surrounding rock in the excavation process through numerical simulation, comprehensive analysis and field monitoring, and the method can provide a reference for the selection of excavation methods in future construction processes.

The invention relates to the technical field of spray pumps, in particular to a piston integrated sprayer which comprises a spray head, a connecting cover used for being connected with a spray bottle and a spray pump assembly arranged on the connecting cover and used for being matched with the spray head. The atomizing pump assembly comprises a pump shell fixed to the connecting cover in a clamped mode, a deformation piston installed on the pump shell and a connecting piston installed on the pump shell and used for being matched with the deformation piston, and the connecting piston is fixed to the lower portion of the spray head in a clamped mode. The deformation piston is provided with a piston head, a piston rod part and a deformation part which are integrally connected. The piston assembly has the effect that the problem that assembly of the piston assembly is tedious is solved.