Thermal control instrument pipe welding installation butt pliers

The utility model discloses a pair of butt pliers for welding and installing a thermal control instrument pipe, which comprises an installing pliers body, the installing pliers body is divided into two pliers arms, the two pliers arms are mutually and rotatably hinged, the pliers arms are bifurcated at the jaw, a welding port is reserved between the bifurcations, a plurality of thimbles are inserted at the jaw of the pliers arms, the thimbles are regularly arranged along the jaw of the pliers arms, and the welding port is formed between the thimbles. Locking needles used for being matched with the ejector pins are inserted in jaws of the clamp arms, and limiting mechanisms used for limiting the ejector pins are arranged on the clamp arms. According to the butt-joint clamping device, two butt-joint pipe fittings can be well clamped and fixed at the same time, so that a connector of a pipeline is kept fixed all the time in the welding process, and the butt-joint efficiency and precision are effectively improved