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Stud anti-shearing connecting piece for constraining concrete splitting and splitting development

The invention discloses a stud anti-shearing connecting piece for constraining concrete splitting and splitting development. The stud anti-shearing connecting piece comprises a stud for connecting a steel beam flange with a reinforced concrete flange; the stud is fixedly connected with the steel beam flange in bolting and welding modes; a circle of high-strength fine stone concrete is fixedly formed on the periphery of the stud; the strength of the high-strength fine stone concrete is larger than that of concrete poured on the reinforced concrete flange; on the periphery of the high-strength fine stone concrete, one-time surrounding tensile force is applied to the high-strength fine stone concrete and assemblies inside the high-strength fine stone concrete through an anti-tension unit surrounding the high-strength fine stone concrete; and meanwhile, a spiral rib is further arranged on the outer side of the anti-tension unit of the high-strength fine stone concrete, concentrically surrounds the outer side of the high-strength fine stone concrete and is formed in the reinforced concrete flange in a pouring mode. According to the stud anti-shearing connecting piece for constraining concrete splitting and splitting development, the longitudinal shear-bearing capacity of the stud anti-shearing connecting piece can be improved, and the effective load of the stud anti-shearing connecting piece in a steel-concrete combination beam under a serviceability limit state is increased, so that obstacles of the steel-concrete combination beam in the design and application status are overcome.
Owner:曹华

Synchronous head sheave balance adjustment method for multi-rope winding type elevator

Disclosed is a synchronous head sheave balance adjustment method for a multi-rope winding type elevator. When the multi-rope winding type elevator works, a container is elevated by two steel wire ropes through head sheave bodies. In the elevating process of the container, when the force applied to the steel wire rope winding around a head sheave on a hydraulic cylinder is larger, the corresponding head sheave body is downwards compressed through the first hydraulic cylinder, so that the force is reduced, and meanwhile, the steel wire rope is loosened for adjustment to a force balance with the steel wire rope on the other side. When the force applied to the other steel wire rope is larger, the corresponding head sheave body 1 is compressed downwards through the second hydraulic cylinder, so that the force is reduced, and meanwhile, the steel wire rope is loosened. When the force applied to the two head sheave bodies is unbalanced, pressure compensation is generated to the hydraulic cylinders; when the first hydraulic cylinder is compressed, hydraulic pressure pressurizes the second hydraulic cylinder for a balance through a communication device, so that the pressure balance of the second hydraulic cylinder and the first hydraulic cylinder is achieved after pressurization; the tension of the steel wire ropes of the multi-rope winding type elevator can be balanced and compensation can be conducted for non-synchronization flexibly and conveniently.
Owner:LUOYANG MINING MACHINERY ENG DESIGN & RES INST
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