Chain-type pipe wrench. It consists of a handle and a chain attached to one end of the handle via a hinge; the front end of the handle features teeth that engage with the chain. Furthermore, the chain is hinged to the handle through a connecting plate, meaning one end of the chain is hinged to one end of the connecting plate, and the other end of the connecting plate is hinged to the handle. The teeth at the front end of the handle are arranged in a circular arc. When in use, the non-hinged end of the chain remains free and not fixed or hinged to the handle. The clamping and rotation of the pipe fitting are achieved by the friction between the pipe fitting and the chain wrapped around it, while the torque is generated by the engagement between the local gear on the front end of the handle and the chain. There is no force application point on the surface of the pipe fitting by the handle. Therefore, the chain-type pipe wrench described in this utility model overcomes the limitations of existing chain-type pipe wrenches. It can clamp and rotate metal pipe fittings, as well as ceramic pipe fittings, thin-walled pipe fittings, plastic pipe fittings, etc., without leaving marks or damaging the surface of the pipe fittings.
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