Water cooling tool for girth welding of pressure container

A support is arranged on one side of a roller carrier, a cross arm is fixed to the top of the support, a water spraying pipe is fixed to the end, close to the roller carrier, of the cross arm, the water spraying pipe is of an arc-shaped structure, a plurality of water spraying holes are formed in the bottom side of the water spraying pipe, the water spraying pipe is connected with a water pump through a water supply pipe, and the water pump is located in a water supply tank. When the welding process is paused and a welding seam needs to be cooled, the water pump is started to supply water to the water spraying pipe, the water is sprayed out of the water spraying holes and hit the position of the welding seam, and meanwhile the pressure container is rotated to conveniently change the cooling position. And cooling water flows to the lowest point through the outer wall of the cylinder body of the pressure container and then falls into the water supply tank, so that water circulation can be realized. 本实用新型公开了一种压力