5results about How to "Improve collapse resistance" patented technology

This invention relates to the field of seismic resistance technology for spatial frame structures, and discloses a method for determining the energy dissipation mechanism of a steel-concrete composite column-composite beam spatial frame. The energy dissipation mechanism includes steel beams, steel-concrete composite columns, and reinforced concrete slabs. The steel beams are welded and fixed to the steel-concrete composite columns via reinforcing rings, and the steel beams are fixedly connected to the reinforced concrete slabs via studs. Tie bars are provided at the ends of the steel-concrete composite columns. The ratio of the flexural bearing capacity of the steel beams to that of the steel-concrete composite columns is within the range of 0.42 to 1.05. By introducing the ductile damage parameter of the steel, combined with the inter-story drift angle, cumulative energy dissipation, beam-column energy dissipation ratio curve, and finite element calculation results of stiffness damage of the spatial frame, the energy dissipation characteristics and energy dissipation mechanism type of the structure are determined. This invention aims to solve the technical problems in the prior art where the steel-concrete composite columns do not form sufficient compression-bending hinges for energy dissipation during seismic resistance, easily leading to collapse, and the technical problems of using beam energy dissipation mechanisms in seismic design while rarely considering column energy dissipation.

This invention discloses an anti-burning foam fire extinguishing agent for lithium batteries and its preparation method, relating to the field of fire extinguishing agent technology. The anti-burning foam fire extinguishing agent for lithium batteries prepared by this invention mainly comprises a foaming agent system, a foam stabilizer, and a heat-absorbing material. The foaming agent system contains sodium perfluorocrown ether sulfonate, the foam stabilizer is modified silica, and the heat-absorbing material contains modified microcapsules. The anti-burning foam fire extinguishing agent for lithium batteries prepared by this invention exhibits good foam stability and fire extinguishing performance.

The utility model belongs to water conservancy slope protection technical field especially relates to a water conservancy slope protection. The utility model provides a water conservancy slope protection, including the slope protection, still include: protection device, protection device fixed setting on the slope protection, the slope protection device is used to fix the silt on the slope protection, the protection device includes the planting interval, the planting interval is used to provide the space of plant growth. In this technical scheme, the planting interval on the protection device can provide the space of plant growth, so that the plant can better survive on the slope protection, so that the soil can be better fixed on the slope protection, not only is favorable to the ecological environment friendly, also prevents the collapse of the slope protection caused by the water and soil loss.

This invention relates to the field of farmland irrigation technology and discloses an irrigation vehicle for preparing hydrogen-rich water for farmland irrigation. It includes a water tank compartment movably connected to the towing hook of a tractor unit. A hydrogen-rich water preparation device is fixedly connected between the water tank compartment and the tractor unit. An irrigation ditch-digging device is also connected to the towing hook of the tractor unit. The irrigation ditch-digging device includes a drainage pipe, a channel soil removal device, and a ditch-opening device. The ditch-opening device uses a slanted plow to dig and open channels in the farmland. The channel soil removal device collects and piles soil after digging and opening channels. The drainage pipe collects and discharges water through the interior of the ditch-opening device. This invention combines a trapezoidal platform shaping device (with protruding strips), a flattening roller, and a water-driven compaction structure to achieve shaping and reinforcement of the soil after trenching. The beneficial effects are significant: the protruding strips of the platform shaping device are embedded in the soil slope, combined with the trapezoidal structure that is narrower at the top and wider at the bottom.