3results about How to "Reduce on-site welding workload" patented technology

This invention relates to the interdisciplinary fields of underground rock engineering and pressure vessel structural safety, specifically to a method for designing the wall thickness of steel linings in high-pressure underground gas storage facilities based on joint load-bearing. This invention establishes a joint load-bearing structural model of the steel lining and surrounding rock, upgrading the traditional model of the steel lining bearing pressure alone to a collaborative stress-bearing model. Through mechanical calculations, the internal pressure sharing effect of the surrounding rock is quantified, avoiding the thickness redundancy caused by neglecting the contribution of the surrounding rock stiffness, effectively reducing the cost of the steel lining and the amount of welding work. Secondly, based on cyclic working loads, the actual stress amplitude of the steel lining is calculated, establishing a quantitative correlation between rock mass characteristics, cyclic pressure, and the stress state of the steel lining, solving the problem that traditional methods cannot quantify fatigue risk. Finally, through multi-dimensional constraint verification and iterative optimization, it ensures that the steel lining simultaneously meets fatigue, static, and structural requirements, achieving wall thickness reduction while ensuring safety, thus balancing engineering safety, economy, and construction feasibility.

The utility model provides an array type pipeline fused salt storage device which comprises a storage part, and a supporting part is arranged at the bottom of the storage part. The storage part comprises a first storage pipe and a second storage pipe, a plurality of third storage pipes arranged in an array mode are connected between the first storage pipe and the second storage pipe, and the third storage pipes communicate with the first storage pipe and the second storage pipe; an input pipe is connected to a port of one end of the first storage pipe, an output pipe is connected to a port of the other end of the first storage pipe, the supporting parts are arranged at the bottoms of the input pipe and the output pipe, and a fourth storage pipe is arranged at a port of the second storage pipe. According to the storage device, the storage space is formed by arranging the array type pipelines on the input pipe and the output pipe, a traditional overall storage tank is replaced, the number of welding seams is reduced, the fused salt leakage risk caused by welding defects is fundamentally reduced, the site construction period is shortened, and the nondestructive testing cost is reduced.

The invention provides a main cross beam and secondary longitudinal beam combined structure bridge deck system and a construction method, and relates to the technical field of bridge structures, the main cross beam and secondary longitudinal beam combined structure bridge deck system comprises a plane steel frame structure and prefabricated slabs, and the plane steel frame structure is arranged on a bridge; the precast slab is arranged on the plane steel frame, and a mounting groove without ribs is formed in the precast slab close to the edge; after the notch steel bars are connected between the mounting grooves of the adjacent prefabricated slabs, cast-in-place layer steel bar meshes are arranged, finally cast-in-place layer concrete is poured, and the formed concrete laminated slab and the plane steel frame structure form the combined bridge deck system. Through efficient combination of two materials of steel and concrete, reasonable arrangement of a force transfer system, industrial manufacturing and installation of steel members and concrete members, and combination of an ingenious structure of slotting without rib exposure and pulling resistance without shearing resistance, the construction cost of a traditional large-span bridge steel bridge deck can be greatly reduced, the field welding workload is reduced, and the construction efficiency is improved. The construction period is shortened and the durability of the bridge deck structure is improved.