Torque wrench for connecting graphite electrodes

Technical field
The utility model relates to the field of graphite electrode submerged arc furnace equipment, in particular to a torque wrench for connecting graphite electrodes.
Background technology
The graphite electrodes used in large submerged arc furnaces have a diameter greater than 500 mm, a length greater than 2000 mm, and a mass greater than 1000 kg. After a period of use, the graphite electrodes need to be extended to ensure the continued use of the electrodes. Due to the characteristics of the electrodes, the extension of graphite electrodes requires high extension accuracy, and the extension operation is done manually when the operating space is limited. Therefore, the torque wrench requires high strength, easy use, labor-saving and time-saving, safe and economical extension.
The original special torque wrench for connecting large-diameter graphite electrodes is a semicircular annular torque wrench. In the process of extending the electrode, the torque wrench handle is fixed by manual pushing, and the thread of the electrode joint is locked by the torque of the handle. When connecting graphite electrodes, the torque wrench cannot rotate freely due to the limitation of the on-site operation position. It can only rotate half a circle each time, and then move the torque wrench again, reposition it again, and repeat the cycle until the two end faces contact each other. The entire extension process requires moving the torque ring more than 20 times, and it takes 60 minutes to extend an electrode. Not only is the labor intensity extremely high and time-consuming, but also because the electrode needs to be powered off during the extension, it will reduce the operation rate of the electric furnace and increase the power consumption after the electric furnace resumes power supply.
Utility Model Content
The technical problem to be solved by the utility model is to provide a torque wrench for connecting graphite electrodes, which only needs to be installed and positioned once when the graphite electrode is extended, and can be continuously rotated to complete the entire electrode installation.
The technical solution adopted by the utility model to solve its technical problems is: a torque wrench for connecting graphite electrodes, comprising a wrench unit, the wrench unit is composed of a semicircular arc frame and at least one handle connected to the semicircular arc frame, the wrench units are two, the two wrench units are buckled together by a connecting piece, the two semicircular arc frames form a ring-shaped electrode ring, and the corresponding handles of the two wrench units are arranged 180° symmetrically.
Further, each wrench unit has two handles, and the handles are arranged near the connecting piece.
Further, anti-slip blocks are fixedly arranged on the inner wall surfaces of the two semicircular arc frames.
Further, anti-slip grooves are arranged on the anti-slip blocks, and the anti-slip grooves of two adjacent anti-slip blocks are in opposite directions.
Further, a reinforcing ring is arranged on the outer wall surface of the semicircular arc frame.
Further, the connecting piece is a connecting bolt.