Steel sleeve manufacturers talk about the principle of technology

The principle of the steel connecting sleeve: the connecting principle of the strong rolling straight thread such as the steel connecting sleeve is as follows: the steel rod end portion is rounded by the roller and the mechanical joint of the steel bar formed by the screw connection is taken out one by one. There are six types of straight threaded joints: (reducing type, flared type is not described here) Type I connection (standard type joint) possible free rotation. The reason for using iron bars is opposite each other in the end strength of the lock bridge piece. Choose a standard sleeve or a reducer connection sleeve. Type II connection (extended joint) is used when the reinforcement is too long and dense and inconvenient to rotate. The steel connecting sleeve is screwed into the lengthening thread of a steel bar in advance, and then the end thread of the steel bar is connected. The connecting rod can be locked by rotating the steel bar for half a turn. A standard type connecting sleeve can be selected. Type III connection (locking female joint) is used for the steel bar to be completely unable to rotate, such as bent steel bars and the joints of steel cages such as bridges and cast-in-place piles. Screw the lock nut and the steel connecting sleeve into the extended thread before screwing it into the other end of the steel bar, and lock the connecting sleeve with the lock nut. Standard or flared connection sleeves can be used to lock the female 24IV type connection (positive and reverse thread type connection) for occasions where the steel bar can not be rotated and the internal force of the steel bar is required to be adjusted, such as construction joints and post-casting belts. The connecting sleeve has a positive and negative thread buckle, which can loosen or tighten the two steel bars in one screwing direction. The steel sleeve with the positive and negative thread buckles should be used first.