Rebar connection sleeve is a relatively common steel connection piece in the modern construction industry, so it is necessary to pay attention to the application scope and process principle.
1. Scope of application: Reinforced steel and other strong thread joints are suitable for all concrete structures with seismic fortification and non-seismic fortification. They are particularly applicable to important structures that require full use of strength and ductility of steel bars. 1.1 Coarse diameter, different diameter rebar connection. 1.2 The connection of bent steel bars and extra long horizontal bars. 1.3 Docking of reinforced cages. 1.4 Docking between two fixed reinforcements. 1.5 Connection of steel structure and steel reinforcement. When the steel column and the main beam of the beam intersect, steel nuts welded on the steel plate can be used to connect the reinforcing steel.
2. Process principle: The principle of steel bar and other strong rolling straight thread connection is as follows: The steel bar end section is pressed round by a roller, and a steel bar joint formed by screwing the thread and the sleeve is rolled out at one time. There are six types of straight thread connector connections: (Reduced diameter type, flare type type is not described here) 2.1 Type I connection (standard type connector) Use Possible free rotation conditions. Use a steel bar to reason each other across the endpoint power of the lock bridge piece. Will choose the standard sleeve or reducer type connection sleeve. 2.2 Type II connections (longer joints) are used where the reinforcement is too long and dense and inconvenient to rotate. The reinforcing steel connecting sleeve is screwed into the lengthened thread of a steel bar in advance, and then the end threads of the steel bar are reversely twisted. The connecting piece can be locked by rotating the reinforcing bar half a turn, and a standard connecting sleeve can be used. 2.3 Type III joints (locking female joints) are used for the complete non-rotation of steel bars, such as the bending joints of reinforced bars and bridges and cast-in-place piles. The lock mother and the connecting sleeve are pre-threaded into the lengthened threads, and then screwed into the thread of the other steel end head, and the lock sleeve is used to lock the connecting sleeve. Standard or flaring connection sleeves can be used to lock the female 2.4 IV-type connection (positive and negative screw-type connection) for occasions where the steel bar cannot be rotated and adjustment of the internal force of the steel bar is required, such as construction joints, post-casting belts, etc. The connecting sleeve with positive and negative threads can loosen or tighten the two reinforcing bars in one direction of rotation. The steel bars with positive and negative threads should be used to connect the sleeve first.
