Steel bar mechanical connecting device and method

Abstract

The invention discloses a steel bar mechanical connecting device and method. According to the steel bar mechanical connecting device and method, a connecting gap between a first steel bar and a second steel bar is eliminated through a pressure-bearing inner ejector rod, so that deformation of a connector under large pressure is easier to reduce, meanwhile direct or indirect connection of the first steel bar and the second steel bar is achieved through an outer threaded sleeve, therefore, the connection is easy without being limited by trouble of difficulty in connection when trajectory lines are not coincident. Through cooperation of the pressure-bearing inner ejector rod and the outer threaded sleeve, mechanical connection between two connecting steel bars with a certain gap in the axial position can be achieved, residual deformation of the connector can be controlled within a small range, and after specified high-stress and large-deformation repeated pulling and pressing circulation, the ultimate tensile strength and deformation performance of the steel bar can still meet regulations in high-stress repeated tension and compression and large-deformation repeated tension and compression in the industrial standard JGJ 107 General Technical Regulations for Mechanical Connection of Reinforcing Steel bars. Steel bar mechanical connection construction under a vertical narrow gap connection working condition of a prefabricated structure is facilitated, and qualified rate of the steel bar mechanical connection device is increased.

Description

technical field [0001] The invention relates to a steel bar mechanical connection device and method, belonging to the technical field of construction engineering steel bar mechanical connection. Background technique [0002] At present, the country is vigorously promoting the industrialization of construction. Construction industrialization refers to the replacement of scattered, low-level and inefficient handicraft production methods in the traditional construction industry through modern manufacturing, transportation, installation and scientifically managed production methods. Its main symbols are standardization of architectural design, factory production of components, mechanization of construction and scientific organization and management. Among them, all standardized accessories and modular reinforced concrete structures need to be assembled through mechanical connection of steel bars. Therefore, in the industrialization technology of steel bar engineering, the mech...

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Problems solved by technology

[0007] 2) The "reinforcement thread trajectory" at both ends of the straight thread joint connection does not coincide, so that the effective connection of the reinforcement cannot be realized: the size error caused by the prefabrication, installation and connection of the parts, it is difficult to ensure that the "reinforcement thread trajectory" at both ends of each joint connection can be correct. coincide

At present, straight threaded joints are used in the connection of basic reinforcement cages. Even if the "pre-assembled" method is adopted on the ground, there are still many joints connected with such problems. Even if the connection torque is increased (may increase several times to 10 times , it seems that the sleeve is connected in place, in fact, the inner connecting thread has been greatly damaged, and the connection performance cannot be qualified

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