61results about How to "Protect structure security" patented technology

A damping combined type building seismic isolation rubber support comprises an outer connection steel plate and a support core body. The support core body comprises a sealing plate, a stiffening steel plate, a high-damping rubber layer and a rubber protective layer which are formed into a whole through heat vulcanization, the high-damping rubber layer is made of ultrahigh-damping rubber, n bar holes are formed in the support core body in the axis direction, high-damping metal bars are arranged in the bar holes, and the high-damping metal bars and the support core body are fused into a whole. The manufacturing method of the seismic isolation rubber support is simple in process. The manufactured high-damping rubber layer has excellent antifatigue performance, deflection resistance and weather ability, and the damping ratio reaches 20 percent. The seismic isolation rubber support combines performance advantages of a high-damping rubber support and a lead core seismic isolation rubber support, remarkable yield force and the equivalent damping ratio are increased greatly, the seismic isolation rubber support is more comprehensive and excellent in horizontal properties, antifatigue performance, deflection resistance and weather ability, seismic mitigation and isolation bearing analysis and using effect of building structures are achieved easily, and the application field is widened. The damping combined type building seismic isolation rubber support is long in service life and stable and safe.

The invention relates to an adjustable combined large-span cable bridge, which includes a plurality of bridges connected horizontally, and the upper ends of two adjacent bridges are connected by rotating shafts, and gears are fixed on the shafts. The gear and the rotating shaft are set to rotate concentrically, and the upper end of the gear is also provided with a matching limit mechanism. The lower ends of the individual bridges are fixedly provided with support plates, and the lower ends of the support plates are fixedly provided with support rods; when the present invention is laying bridges, when obstacles are encountered, the laying of the bridges will be affected. , we can make the cable tray curved and combined to bypass obstacles, ensuring the normal laying process of the cable tray and improving the scope of application of the cable tray.

The invention discloses a material for tunnel isolation and a construction method of the material. The material is prepared from components including, by weight, coarse aggregates, 70-150kg / m<3> of cement and water, wherein water-cement ratio is between 0.38-0.52; the particle size of the coarse aggregates is 10-22mm, and the coarse aggregates are gravels and rubbles which are uniform in particle. By the arrangement, absorption of a non-sand isolation layer on wave propagation is facilitated, the non-sand isolation layer is arranged between the surrounding rock and the lining of a tunnel to absorb wave that the surrounding rock propagates to the lining, the tunnel structure is protected from being destroyed, and the tunnel can be protected from being destroyed under the action of earthquake wave. The material is reasonable in structure, simple in construction, low in cost and capable of improving isolation and disaster prevention performance between the surrounding rock and the lining of the tunnel, and a traditional construction method is not changed.

The invention discloses a foldable flapping wings and fixed wings coupling-structured aircraft design. Foldable flapping rods are arranged on the leading edges of the flapping wings, wherein the foldable flapping rods comprise inner, middle and outer three-section rod-shaped structures connected through hinges. When the aircraft flies, the flapping rods are unfolded into a rectilinear figure to drive the flapping wings to flap up and down to generate lift force and thrust; when the aircraft lands, the flapping rods are folded into U shape, so as to remarkably decrease the feature size of the aircraft; the fixed wings adopt light shell structures; when the aircraft flies, the shell structures on the two sides are unfolded above the flapping wings and function as a lifting surface for the fixed wings, so that the aerodynamic efficiency of the aircraft is effectively improved; after the flapping wings are folded into U shape, the shell structures on the two sides are folded into a firm and tight half-surrounded shell structure and the folded flapping rods and other components of the aircraft are covered inside the half-surrounded shell structure, so that the occupied space of the aircraft is reduced and meanwhile the integral safety of the aircraft is significantly improved; the aircraft is convenient to store and transport.