English
Products Description
Introduction
The threaded steel sleeve is usually made of low-carbon steel (such as Q235, Q355) or alloy structural steel through forging and machining. The main body is a straight-walled tubular shape, and the inner wall is processed with internal threads that match the threads at the end of the threaded steel (including straight threads, conical threads, etc.). The connection principle is as follows: First, through a special device, the threads at the end of the threaded steel are stripped, rolled, or cut to form external threads; then, the two threaded steel bars are respectively inserted into the two ends of the sleeve, and the force is transmitted by the thread engagement, forming an integral force-bearing unit between the steel bar and the sleeve.
Compared with other types of grouting sleeves, the threaded steel sleeve does not rely on grouting materials, and the connection quality is less affected by the construction environment (such as humidity, temperature), and the connection quality can be intuitively checked by the insertion depth, and is suitable for most scenarios with high requirements for connection efficiency and reliability.
Purpose
The threaded steel sleeve is the core component for connecting threaded steel bars. It is widely used in:
1. In cast-in-place concrete structures (such as frame columns, beams, shear walls), for longitudinal butt joints of threaded steel bars with diameters ranging from 12mm to 40mm (such as HRB400, HRB500, etc.);
2. For mechanical connections of threaded steel bars in prefabricated components of assembly buildings (such as prefabricated columns, composite beams), which require pre-embedding in the factory or on-site butt joints when prefabrication is carried out;
3. For threaded steel bar connections in civil engineering projects such as bridges, tunnels, and water conservancy projects that bear combined tensile, compressive, and bending forces; 4. For projects with high requirements for the detectability and reworkability of connection nodes (such as high-rise buildings, large venues).
