Construction reinforcing steel high strength fast screw thead joint

Abstract

A high-strength high-speed screw jointer for reinforcing bars used for building is composed of two internal sleeve tubes with internal and external spiral threads, and an external sleeve tube with internal spiral thread. Said internal sleeve tubes are screwed between reinforcing bars and external sleeve tube. Its advantages are high joint strength and speed, and high reliability.

Description

technical field [0001] The invention relates to a steel bar connection technology for buildings, bridges, tunnels and pile foundations, in particular to a high-strength fast threaded joint for building steel bars. Background technique [0002] As we all know, construction, bridges, tunnels, pile foundations and other projects are a century-old project, and steel bars are the most important factor to ensure the quality of the project. When the height or length of the project is greater than the standard steel bar length, the steel bar connection technology must be used. Therefore, steel bar joints The connection strength at the joint directly affects the quality of the project, and the connection speed directly affects the progress of the project and the labor intensity of the workers. Therefore, people have devoted a lot of effort to the research on the connection method of the steel bar joint, and invented various the same connection method. Such as; welding method, sleeve...

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Problems solved by technology

Such as; welding method, sleeve cold extrusion method, taper thread connection method, upsetting steel bar connection method, rolling straight thread connection method, etc., these methods have solved the problems in the project to varying degrees. The threaded connection method is to roll the end of the steel bar into an external thread with a one-time axial feed of a rolling machine, and then screw the two steel bar heads that have been rolled with external threads into an internal thread sleeve to be connected. The inner thread sleeve connects the two joints into one. This connection method has the advantages of high connection strength, convenience and practicality, but this connection method has high requirements for steel bar processing. It must first ensure that the thread outer diameter of the processed steel bar head is less than It is equal to the outer diameter of the steel bar. Secondly, when batch connection is required, such as bridge pier construction, more than 5 joints must be connected in a limited space at the same time. The labor intensity of workers tightening the threaded sleeve is quite large, and the operation is inconvenient. In addition, The connection status of the connection cannot be judged intuitively. There will be more connections at one end and less connections at the other end, which will affect the connection strength and easily cause quality and safety hazards

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