Threading device suitable for building electrical pipeline

A threading device suitable for a building electrical pipeline, comprising a fan, a take-up and pay-off main machine and a connecting hose, wherein the take-up and pay-off main machine comprises a ventilation bin, a wire wheel bin and an electrical bin;

• a fan connector and a hose connector are arranged on the ventilation bin, an air channel communicating with the fan connector and the hose connector is arranged in the ventilation bin, the connecting hose is connected with the hose connector, and the fan is connected with the fan connector;
• a wire inlet is formed in the side wall of the ventilation bin, a wire outlet of the wire wheel bin communicates with the wire inlet of the ventilation bin, a wire wheel is arranged in the wire wheel bin, and a strong wire is wound on the wire wheel;
• the electrical bin is tightly attached to the wire wheel bin, the electrical bin and the wire wheel bin are separated through a partition plate, and a wire wheel driving device is arranged in the electrical bin;
• a take-up state induction mechanism is arranged in the ventilation bin and comprises a bent pipe converging device;
• the two ends of the bent pipe converging device face the hose connector and the wire inlet respectively, the end, facing the hose connector, of the bent pipe converging device is rotatably connected with the inner wall of the ventilation bin through a first rotating shaft, a bent pipe converging device lifting spring is arranged on the first rotating shaft;
• a first microswitch is arranged in the wire outlet of the wire wheel bin, and the first microswitch is connected to a power supply line of the wire wheel driving device;
• a wiring channel is arranged in the bent pipe converging device, and a wire end of the strong wire penetrates through the wiring channel and penetrates out of a pipe opening of the connecting hose;
• when the strong wire is tightened, the bent pipe converging device rotates around the first rotating shaft and makes contact with the first microswitch, the first microswitch is disconnected with the power supply line of the wire wheel driving device, and the wire wheel driving device stops running;
• and when the strong wire is loosened, the bent pipe converging device is driven by the bent pipe converging device lifting spring to reset, and the first microswitch is connected with the power supply line of the wire wheel driving device.