6results about How to "Simple and efficient structure" patented technology

The invention discloses a magnetic confinement hybrid superconductive DC current limiter, which comprises a current limiting unit and a quench protection unit, and is characterized in that the current limiting unit comprises a resistor R and a superconductive coupling coil L2, and the resistor R and the superconductive coupling coil L2 are connected in parallel; the quench protection unit comprises a superconducting coupling coil L1 and a capacitor discharge module, and the superconducting coupling coil L1 and the capacitor discharge module are connected in series to form a series loop; the superconducting coupling coil L2 of the current limiting unit is coupled with the superconducting coupling coil L1 of the quench protection unit. The short-circuit current peak value can be effectively suppressed, the breaking current of the direct-current circuit breaker is reduced, and the reliability of system fault removal is improved.

This invention relates to the field of bridge engineering technology, specifically to a wind-resistant device and construction method for the main girder of a cable-stayed-suspension bridge during construction. It includes: a first connecting part, a second connecting part, a crossbeam, and anchor cables. The first connecting part is fixedly connected to the main girder in the suspension zone, with at least two sets of the first connecting parts connected to both ends of the main girder in the suspension zone, distributed on both sides of the main girder in the suspension zone. The second connecting part is fixedly connected to the main girder in the cable-stayed zone, with at least two sets of the second connecting parts connected to one end of the main girder in the cable-stayed zone near the main girder in the suspension zone, distributed on both sides of the main girder in the cable-stayed zone. The crossbeam is connected to two main cables in the overlapping zone. One end of the anchor cable is connected to the first connecting part, passes through the crossbeam in the middle, and the other end is connected to the second connecting part. This invention can improve the wind resistance performance of the main girder in the suspension zone, and is highly targeted, has good wind control effect, and is convenient to install and apply.

The invention relates to the technical field of bridge engineering, in particular to a main beam wind-resistant device for a cable-stayed-suspension cable cooperative system bridge in the construction period and a construction method. Comprising first connecting parts, second connecting parts, cross beams and anchor cables, the first connecting parts are fixedly connected to a suspension area main beam, the two ends of the suspension area main beam are at least connected with two sets of first connecting parts respectively, and the first connecting parts are distributed on the two sides of the suspension area main beam; the second connecting parts are fixedly connected to the cable-stayed area main beam, the end, close to the suspension area main beam, of the cable-stayed area main beam is at least connected with two sets of the second connecting parts, and the second connecting parts are distributed on the two sides of the cable-stayed area main beam; the cross beam is connected to the two main cables in the overlapping area; one end of the anchor cable is connected with the first connecting part, the middle of the anchor cable penetrates through the cross beam, and the other end of the anchor cable is connected with the second connecting part. The wind resistance of the main beam in the suspension area can be improved, pertinence is high, the wind resistance control effect is good, and installation and application are convenient.

The present invention relates to the technical field of negative electrode materials for lithium ion batteries, and specifically provides a porous structure silicon-carbon composite microsphere and a preparation method and application thereof. By using an aqueous solution obtained by mixing CNT-COOH, SiNPs and PS nanoparticles as a precursor solution, a span 80 n-hexadecane solution as a continuous phase, adjusting the flow rates of the continuous phase and the dispersed phase, so that the dispersed phase is shear-emulsified by the continuous phase in a microfluidic device to form microemulsion droplets of uniform size, and obtaining microspheres after drying, the microspheres are calcined under an inert atmosphere, and the PS nanoparticles are removed to obtain silicon-carbon composite microspheres. This technology is not only simple and effective, but also the prepared silicon-carbon composite material has uniform size and abundant pores. The volume expansion of silicon during the charge and discharge process can be alleviated to ensure the integrity of the material structure, while providing a transport channel for ions and improving conductivity. When the silicon-carbon composite material is applied to the negative electrode of a lithium ion battery, the battery exhibits excellent electrochemical properties.

The utility model discloses a concrete pole multi-site strength detection device, which comprises a base arranged on the bottom surface, the top of the base is fixedly connected with the bottom of a lifting platform through a hydraulic cylinder, the top surface of the lifting platform is provided with a cambered surface groove, and the inner side of the cambered surface groove is hinged with a plurality of groups of fixed pulleys matched with the surface of a pole. The top face of the lifting table is in sliding fit with the bottom of a counter-force frame, the top of the counter-force frame is connected with an extrusion block through a connecting rod, a plurality of supporting rods matched with the surface of an electric pole are vertically and fixedly arranged on the surface of the base, and the tops of the supporting rods penetrate through the surface of the cambered surface groove and are in sliding fit with the cambered surface groove. The device disclosed by the utility model can detect the strength of a plurality of sites on the surface of the concrete pole, can comprehensively detect the strength of the pole, and greatly improves the detection accuracy.

The novel plastic particle dewatering and drying equipment comprises a pre-dewatering module, a dewatering and air-drying module and a centrifugal fan, the dewatering and air-drying module comprises a dewatering outer pipe, a central air pipe and an air guide spiral rod, and the central air pipe is concentrically arranged on the inner side of the dewatering outer pipe; a dewatering working channel is formed between the inner circumference of the dewatering outer pipe and the outer circumference of the central air pipe, the air guide screw rod is vertically arranged in the central air pipe, air outlet holes are annularly and densely distributed in the outer circumference of the central air pipe, and water filtering holes are annularly and densely distributed in the outer circumference of the dewatering outer pipe; high-pressure air in the central air pipe is forced by the air guide screw rod to rotate and then is blown into the dewatering working channel from the air outlet holes, and particles are driven by the rotating high-pressure air to rotate at a high speed towards the particle output port to impact the water filtering holes, so that the dewatering effect is achieved. The particles are not in direct contact with a structure with sharp edges during air drying and dehydration, so that the influence on the surface of a product is reduced, and the generation of powder is reduced due to no high-speed impact.