41results about How to "Increase the effective section" patented technology

The present invention relates to a method of preparing hybrid organo/mineral nanoparticles comprising an organic fluorescent crystalline core encapsulated in an inorganic shell, and to nanoparticles that can be obtained by said method. The method of the present invention comprises the following steps: (i) a sol-gel mixture able to be obtained by a process comprising the addition, in at least one organic solvent, in the presence of water, of a fluorescent organic compound and at least one metal alkoxide is sprayed; (ii) the sprayed sol-gel mixture is dried, by evaporating the solvent and the water that are present in the sol-gel mixture. The nanoparticles of the present invention can be used for example as a tracer in medical imaging or as a chemical sensor.

The invention discloses a novel safe grounding method of a transmission line tower. The method includes that a linoleum insulating layer is laid on the upper layer, and a three-dimensional ring-shaped grounding body is laid on the lower layer, so that hazard caused by step voltage and touch voltage of the transmission line tower is reduced. The three-dimensional ring-shaped grounding body comprises an upper layer cylindrical grounding body (4), a middle layer vertical connection body (5), a bottom circular ring (6) and a peripheral welding level radiation pole (7) with a circular ring structure. According to the method, dispersion resistance is effectively reduced, a GPF-94 resistance reducing agent is filled to the inside of the ring shape to improve soil parameters, reduce ground resistance and enlarge an effective cross section of the grounding body, and a good voltage balancing function is achieved. By means of the level radiation pole, current dispersing is greatly performed. The linoleum insulating layer is laid at a position of a peripheral ground voltage balancing body, which is 0.8m above the ground surface, so that permissible value of the step voltage is increased, and value of current which flows through a human body is decreased. The grounding method for decreasing step voltage of the transmission line tower has the advantages of being good in current dispersing and voltage balancing effects of the bottom layer, wide in application range, convenient to construct, corrosion resistant, safe and reliable.

The invention discloses a grounding method of reducing local impact grounding resistance of a power plant and a substation, which comprises an inner-layer annular horizontal grounding body, an outer-layer annular horizontal grounding body, a horizontal connection body and a vertical grounding body. According to the grounding method of reducing local impact grounding resistance of a power plant and a substation, local impact grounding resistance of a power plant and a substation can be reduced, diffusion of local impact grounding current is enhanced, a grounding grid local electric potential can be prevented from rising, and safety of primary and secondary devices such as a transformer can be protected; electric potential and electric field distribution around a grounding electrode can be improved, the step voltage, device contact voltage values and the like can be reduced; and the grounding method of reducing local impact grounding resistance of a power plant and a substation has the advantages of wide application range, convenient construction, corrosion resistance, safety and reliability, and long service life.

Bases are disclosed that comprise a projecting portion designed to receive over it the hollow end of a pole or other elongate member, which may form part of a structure such as a pavilion or umbrella. The projecting portion of the base comprises wedges that move in response to the end of the pole moving over the projecting portion and in so moving, the wedges increase the effective cross section of the projecting portion to engage the inner surface of the end of the pole and to thereby stabilize the structure on a support surface, such as the ground. Braces are also disclosed that pull together adjacent poles of a pavilion to make the structure more rigid.

The invention provides a fragmentation-type ferrite pearlitic structure high strength and toughness nodular cast iron and a production method thereof. During melting and casting processes of the nodular cast iron, the casted nodular cast iron is placed in a normalizing furnace for insulation, the holding temperature is 810-860 DEG C, the insulation is carried out for 1-1.5 hours, after air cooling, the fragmentation-type ferrite pearlitic structure high strength and toughness nodular cast iron is obtained. The fragmentation dispersion-type ferrite tissue can be obtained through the production method, the fragmentation-type ferrite content can be controlled at 1-10%, so that the high intensity of the pearlite nodular cast iron is embodied, and the high plasticity and high toughness of the ferrite nodular cast iron are obtained. The fragmentation-type ferrite pearlitic structure high strength and toughness nodular cast iron has the performance characteristics that the tensile strength is 830-920 Mpa, the percentage elongation is 6-9%, the impact toughness is 50-70 J/cm<2>, and the Brinell hardness is 250-270 HBW. The nodular cast iron has high tensile strength, high percentage elongation and high impact toughness, and can generally suitable for parts such as automobile crankshafts, camshafts and hydraulic cylinders.

The invention provides a highly-efficient composite cage bar motor rotor. The highly-efficient composite cage bar motor rotor comprises a rotor, and is characterized in that the rotor comprises a set of rotor punching sheets, inner and outer squirrel cage slots are formed in the rotor punching sheets; inner squirrel cage bars are inserted in the inner squirrel cage slots; a silicon aluminum outer squirrel cage which comprises outer squirrel cage bars and an end ring is cast in the outer squirrel cage slots once; the end ring comprises blades and balance columns; two ends of each of the inner squirrel cage bars and the outer squirrel cage bars are connected with the end ring integrally. The highly-efficient composite cage bar motor rotor disclosed by the invention is reasonable and simple in structure, scientific and advanced; when the highly-efficient motor rotor of high-speed pressed copper-aluminum double-squirrel cage composite cage bars is started, the starting current is concentrated on the outer squirrel cage due to a skin effect, equivalently, an effective section is small, the effective resistance is large, and power factors are increased, so that the starting current of a motor is reduced, and the starting torque is increased.

The invention discloses an elastomeric product for modifying common soil and a production method thereof. The production method comprises the steps of: removing impurities in soil, drying, crushing and screening to obtain soil particles; then dynamically heating common soil particles, adding a surface modifying agent, drying to obtain modified soil, wherein the surface modifying agent comprises a coupling agent, polyorganosiloxane with reactive functional groups, organosilicon, fatty amine emulsifying bodies and water; and finally, preparing an elastic runway surface layer, a sports ground floor, synthetic leather, household and commercial floors, household and commercial wall decorating materials and the like by using the modified soil and crylic acid cementing agents as main components and doping with a compound prepared by a cross-linking agent, a softening agent, the coupling agent, a foaming agent or defoaming agent and the like. The product has no toxic and harmful gas volatilization in the whole production and use processes, has compression deformation ratio, rebound resilience and durability reaching or exceeding properties of rubber or some plastics, and is an elastic plane material with low cost, high performance and environment protection.

A Raman amplifier system is provided for amplifying optical signals that are transmitted via a transmission medium, the series circuit being composed of a standard single-mode fiber arranged on a transmit side, and a second optical fiber arranged on a receive side.

A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. Two meshing screw rotors are arranged in the suction chamber. Further, an overpressure outlet provided, which comprises an overpressure opening in a side wall of the suction chamber. Further, an overpressure valve is arranged in the overpressure outlet. The width (b) of the overpressure opening in the longitudinal direction of the screw rotors is smaller than or equal to a tooth width (B) of the screw rotors.

Vibration damper comprising a cylinder in which a piston rod is guided with freedom of axial movement, where the piston rod cooperates with a piston arrangement comprising a first, stationary piston and at least one additional piston, which is supported on the piston rod with freedom of axial movement against the elastic force of at least one restoring spring, where the cylinder is divided by the stationary piston and by the minimum of one axially movable piston into a working space on the side of the piston facing the piston rod, a working space on the side of the piston facing away from the piston rod, and a working space between the two pistons, where valve-equipped through-openings control a connection between the working spaces, and where the axial movement of the minimum of one axially movable piston is limited by a hydraulic pressure stop.

The invention discloses a grounding method for low voltage work. The method includes: sleeving ground wire copper terminals at the multi-branch end of a short circuit ground wire by the small end of a ground head of a nut ground post; connecting a connecting post and the ground post to form a conductor end; connecting one ground wire clamp end of the short circuit ground wire to a device ground member; checking that a low-voltage device bears no voltage, and fastening the nut ground post to a bolt of one phase bus or conductor of the low-voltage device with a special insulating operating bar; sleeving a nut of the nut ground post with a socket of the special insulating operating bar, tightening the nut, and tightening the connecting post and ground head of the nut ground post. Special nut ground posts of different specifications can be connected with the bus bar or conductor bolt of the low-voltage electrical device in a fastened manner, connecting is firm, contact section is even, effective section is maximized, and reliability is high.

The invention provides an induction heating device, which comprises a device shell, a power supply and a control unit, and is characterized in that the device shell comprises a cavity for accommodating at least one part of an aerosol generating substance, a heating base body arranged in the cavity, and an inductor capable of generating a magnetic field axis; the control unit is connected to the inductor and is configured to provide high-frequency alternating current for the inductor; the inductor is a metal sheet with high conductivity, and the metal sheet is arranged to surround at least onepart of the outer surface of the cavity to form at least one layer of winding. The inductor is larger in effective cross section and better in electromagnetic conversion efficiency, the temperature measurement circuit is printed on the heating base body, temperature detection of the heating base body is more accurate and convenient, the manufacturing process is mature and simple, consistency is excellent, and the defects of butt welding of thermocouple wires on the surface of a heating body in the prior art are overcome.

The invention relates to method for rendering sustainable the electromagnetic characteristics of optically active composite materials, said method comprising: a first step of preparing doped organic compounds by mixing at least one type of optically active molecules with a protective material in order to prevent the contact thereof with photodegradation-inducing elements and the migration of the optically active molecules; a second step of producing optically active nanoparticles including said doped organic compounds; and a third step of producing optically active composite materials by incorporating the optically active nanoparticles into a polymer matrix.

The invention refers to an electro-magnetic pressure control valve with a magnetic part and a valve part. The magnetic part has at least on coil that can be electrically triggered, a coil core and an armature guided traversingly. The valve part has a feed for the pressurized medium, a return and a consumer connection. The valve part has at least two seat valves that can be closed each by a valve element.

The invention discloses an online hollow cable and a diameter expansion mechanism for processing the same. The online hollow cable comprises an aluminum tube, a copper tube and an insulating jacket layer, the aluminum tube is mounted inside the copper tube in a sleeved manner, a main insulating layer is connected outside the copper tube in a sleeved manner, a semiconductive layer is connected outside the main insulating layer in a sleeved manner, a shielding protection layer is connected outside of the semiconductive layer in a sleeved manner, and the insulating jacket layer is connected outside the shielding protection layer. Structural features of conventional buses are changed according to characteristics of current; by adopting a tubular structure and shielding insulation technology, dead weight is reduced, and the online hollow cable is safe, reliable, energy-saving and material-saving. Aluminum is used to save copper, so that cost is lowered substantially, and the nation and thepeople can be benefitted; an insulation shielding material can be used in various severe natural conditions, has excellent electrical performance and chemical stability and is little in medium loss, flame-resistant and aging-resistant, and service life is longer than 40 years. The shielding material is a copper film or an aluminum film. A shielding magnetic field is uniform in distribution, localdischarging potential is improved, and electric energy loss is lowered.

The invention provides an integrated transformer which comprises a plurality of metal layers arranged in a stacked mode, and each metal layer is provided with a coil; a plurality of dielectric layers,and each dielectric layer is located between two adjacent metal layers, and each dielectric layer is provided with a through hole; the input ends of the coils in the two adjacent metal layers are connected through through holes corresponding to the input ends in the dielectric layers, and the output ends of the coils in the two adjacent metal layers are connected through through holes corresponding to the output ends in the dielectric layers; in the present invention, a dielectric layer is arranged between the metal layers; a through hole is formed in the dielectric layer; the coils of the metal layer are connected through the corresponding through holes; the metal layers can be connected only by forming the through holes in the dielectric layers; current circulation can be realized without complete fitting between the metal layers, the influence caused by the skin effect is greatly reduced, the effective cross section of each metal layer is increased, and the total effective cross section of the current of the integrated transformer can be greatly increased by increasing the number of the metal layers, so that the performance of the integrated transformer is effectively improved.

The invention relates to the technical field of flue gas denitration, in particular to an ammonia spraying structure and a reactor. The ammonia spraying structure comprises an ammonia spraying pipe, a plurality of nozzles and a plurality of protection plates, the cross section of the ammonia spraying pipe comprises at least one straight edge perpendicular to the flue gas flowing direction and at least one connecting edge connected with the straight edge, and the connecting edge and the straight edge jointly define a closed space; the projection of each connecting edge on the straight edge falls within the range of the straight edge, and the farthest extension distance of the cross section in the flue gas flowing direction is larger than or equal to the width of the straight edge; the ammonia spraying pipe comprises a spraying inlet and a plurality of spraying outlets; the nozzles are of tubular structures, one ends of the nozzles communicate with the spraying outlets, and the other ends of the nozzles extend in the flowing direction of the flue gas; and the plurality of protection plates are connected to the ammonia spraying pipe, and each protection plate is matched with one nozzle and is suitable for preventing the nozzle from being blocked. Compared with a traditional ammonia spraying structure, the ammonia spraying structure occupies a small cross sectional area of the flue.