7results 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 inverted cold-bending curled steel composite beam structure which comprises a composite beam unit and a concrete bridge deck arranged on the composite beam unit, the composite beam unit comprises a plurality of cold-bending curled steel beams which are arranged in parallel, each cold-bending curled steel beam comprises an upper flange plate, two webs and two lower flange plates, the two lower flange plates are horizontally rolled outwards along the bottom ends of the webs, the upper flange plate, the two webs and the two lower flange plates define a hollow steel beam structure with an inverted-U-shaped cross section, a plurality of bolt penetrating holes are formed in the two lower flange plates of each cold-bent edge-rolled steel beam, and every two adjacent cold-bent edge-rolled steel beams are connected through a plurality of inter-beam lacing bars. According to the utility model, the cold-bending curled steel beams are designed into inverted structures, so that bending and torsional stress can be better resisted, the separated cold-bending curled steel beams can be conveniently and quickly connected through the lacing bars between the beams, and the construction difficulty and risk are greatly reduced.

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.

The utility model discloses a double-layer water stop structure for a hydraulic structure, which comprises a first water stop piece, an upper water stop unit parallel to the first water stop piece and a second water stop piece for connecting the first water stop piece and the upper water stop unit together, and the second water stop piece is perpendicular to the first water stop piece. The second water stop piece is fixedly connected with the first water stop piece through a first connecting structure, the first connecting structure comprises a first connecting piece fixedly connected to the bottom of the second water stop piece and a first pressing piece arranged on the lower side of the first water stop piece, the first connecting piece and the first pressing piece are fixedly connected together through a rivet, and the first connecting piece is welded to the first water stop piece. The first connecting piece is integrally formed on the lower portion of the second water stop piece, reliable connection of a copper sheet water stop and a rubber water stop is achieved, the water stop effect of the connecting position can be effectively guaranteed, large-scale machining in a factory can be achieved, the welding quality is guaranteed, the field welding operation amount can be reduced, the later manual maintenance frequency and the later manual maintenance period are reduced, and the production efficiency is improved. And the water stopping effect is further improved.

The utility model provides a novel assembled sandwich plate, which belongs to the field of assembled structures and comprises a first panel component and a second panel component. Wherein the first panel assembly comprises a first panel, at least two first abdomen supports and at least two rectangular pipe sleeves, and the second panel assembly comprises a second panel, at least two second abdomen supports and at least two rectangular pipe shafts. The first abdomen support is connected to the first panel to form a support; the rectangular pipe sleeve is correspondingly connected to the first abdomen support, and an avoiding opening is formed in the side, away from the first abdomen support, of the rectangular pipe sleeve. The second belly support is connected to the second panel to form a support, the rectangular pipe shaft is correspondingly connected to the second belly support, the rectangular pipe shaft is inserted into the rectangular pipe sleeve, and the second belly support and the rectangular pipe sleeve avoid through the avoiding opening. According to the sandwich plate, the first panel assembly and the second panel assembly are assembled in a mutual meshing mode, the sandwich plate is formed, the field welding workload is greatly reduced, and transportation is convenient.

The invention relates to the field of bridge engineering, in particular to a concrete bridge pier and steel box girder consolidation device and a construction method thereof.The consolidation device comprises a steel pipe, a bottom steel plate, a horizontal stiffening plate and a connecting steel plate, the bottom of the steel pipe is installed in the concrete bridge pier, and the top of the steel pipe is installed in the steel box girder; the bottom steel plate, the horizontal stiffening plate and the connecting steel plate are sequentially arranged at the bottom, the middle and the top of the steel pipe, the bottom steel plate is located in the concrete pier, the horizontal stiffening plate is located on the upper surface of the concrete pier, and the connecting steel plate is located on the lower surface of the steel box girder. Steel box girder manufacturing, consolidation device manufacturing and pier lower portion concrete pouring can be conducted at the same time, and the construction period is shortened; the connecting structure is simple, the on-site welding workload is small, and only the connecting steel plate needs to be welded to the steel box girder bottom plate. According to the invention, the technical problems of high connection construction difficulty and complex working procedures of the existing concrete pier and the steel box girder can be solved, and the concrete pier and the steel box girder can be quickly consolidated.