High precision torque-measuring device used for petroleum pipe dismounting rack

The utility model relates to a high precision torque-measuring device used for a petroleum pipe dismounting rack. The high precision torque-measuring device comprises a support plate, a clamping body, a force measuring rod, a pull pressure sensor and a data acquisition display system, wherein the clamping body is rotatably mounted on the support plate through a bearing and provided with a workpiece clamping mechanism, the force measuring rod is arranged along a radial direction of a rotation track of the clamping body and fixedly connected with the clamping body, a stressed direction of a force measuring sensor is perpendicular to the force measuring rod, one end of the force measuring sensor is in thread connection with the sensor seat, the other end of the sensor seat is hinged with the support plate through a first pin shaft, the other end of the force measuring sensor is in thread connection with a sensor ball head, the other end of the sensor ball head is hinged with the force measuring rod through a second pin shaft, and the data acquisition display system is connected with the pull pressure sensor through lead. The high precision torque-measuring device can accurately measure a torque value during spinning, can display in a digital mode, can realize precise control of a torque and guarantees reliability of thread connection of products.