Wire-guided automatic pay-off device and method

A wire-guided automatic pay-off device, being installed on a horizontal directional drilling rig, the horizontal directional drilling rig comprising a carriage assembly, a short joint and a drill pipe, a rear end of the short joint being fixedly connected to a main shaft of the carriage assembly and rotating together with the main shaft, and a front end of the short joint being connected to the drill pipe, wherein the wire-guided automatic pay-off device comprises a conductive ring assembly, a brush assembly, a winding device, a guide device and a guide wire, the conductive ring assembly is fixed to the main shaft of the carriage assembly and rotates together with the main shaft, the brush assembly is fixed to a body of the carriage assembly and does not rotate with the main shaft, and a conductive end of the brush assembly is in contact with the conductive ring assembly;

• the guide device and the winding device are fixedly connected to the short joint and rotate together with the short joint;
• the guide wire is wound on the winding device, and has one end connected to the conductive ring assembly and the other end passing through the guide device, then penetrating into a central hole in the drill pipe from a rear end of the drill pipe, and finally extending out from a front end of the drill pipe to be connected to a guide wire in a drill pipe that has been pushed into a working face, thus forming a complete and tight guide wire,
• wherein the winding device and the guide device are fixedly connected to the short joint by means of hoops.