Pipe fitting clamping device

The invention discloses a pipe fitting clamping device. The pipe fitting clamping device comprises a magnetic ring, a sensor, a tensioning motor, a main controller, a motor driver, a core shaft, an expansion block mounting seat, an expansion block mechanism, a tension spring, a rack, a lead screw, a first switch and a second switch; a body of the tensioning motor and the expansion block mounting seat are fixedly connected to the rack, and an output shaft of the tensioning motor is in transmission connection with the lead screw; the core shaft is slidably connected to the expansion block mounting seat, and the lead screw and the core shaft are in threaded connection; the expansion block mechanism comprises a plurality of radial sliding blocks and a plurality of expansion blocks, the radialsliding blocks are slidably connected into sliding grooves of the expansion block mounting seat, and the conical faces of the radial sliding blocks are matched with a cone part of the core shaft; themagnetic ring is fixedly connected to the output shaft of the tensioning motor; the sensor is fixedly connected to the body of the tensioning motor; the sensor, the motor driver, the first switch andthe second switch are all electrically connected with the main controller; and the tensioning motor is electrically connected with the motor driver. The pipe fitting clamping device can automaticallyclamp a steel pipe, and clamping force can be automatically controlled.