Steel sleeve is also called steel joint, and straight thread steel joint: a connector used to connect steel bars and having internal threads corresponding to threads of wire heads. Simple construction process: the steel bar ends are processed into straight threads by rolling process, and the two steel bars are connected with each other by corresponding connecting sleeves.

Rib stripping and rolling straight thread connection of reinforcing steel bar is a new technology of reinforcing steel bar connecting sleeve. Its structural principle is to strip a part of longitudinal ribs and transverse ribs at the ends of reinforcing steel bars to be connected by cutting, then roll them directly into ordinary straight threads, and then connect them with special straight thread reinforcing steel bar connecting sleeve to form the connection of reinforcing steel bars. The advantages of this connection method are as follows:
1. Good mechanical properties, safe and reliable connection: because the steel bar ends are rolled and the steel bar materials are cold treated, the strength of the threads and steel bars are improved, which makes up for the influence of the thread bottom diameter smaller than the base circle diameter of the steel bar base material on the strength weakening, so that the joint strength of the connection is higher than that of the base material, and the base material can give full play to its strength and ductility.
2. Convenient connection: it can be operated flexibly in places with dense arrangement of steel bars in narrow fields. Convenient construction and high efficiency: the steel bar connecting sleeve is prefabricated in the factory, and the quality is guaranteed: nearly 400 joints can be processed in each shift of the on-site thread head rolling equipment, which has incomparable advantages in the construction of large quantities and basement bottom plates, and has no pollution or open flame operation during construction, and is safe and environmentally friendly, and can be constructed all day long.
3. Easy to detect: the quality of joints can be determined only by looking at the exposed teeth of steel bars without using special detection equipment during construction. Strong applicability: It is suitable for the reinforcement connection of all seismic and non-seismic reinforced concrete structure projects, and it is also suitable for bending reinforcement, fixed reinforcement, reinforcing cage, super-long reinforcement, etc. and non-rotating occasions.