Weight balancer and pipe joining method

Abstract

The present invention relates to a weight balancer () and a pipe joining method that is capable of reducing a load of pipes when arranging and welding the pipes in ships, plants, piping work sites and the like. A weight balancer () according to the present invention includes an operation plate () for putting an alignment object; a plurality of load cells () installed in the lower portion of the operation plate (); a controller () which receives a detection signal generated from the load cell () and analyzes the information of the alignment object to generate a control signal; an operation force driver () which receives the control signal from the controller () to control an operational pressure of each of a plurality of pressure supply lines; and a plurality of leveling cylinders () and balancing devices () which are connected to the pressure supply lines to control a location or pose of the operation plate () so as to correspond to the size of the operational pressure controlled by the operation force driver ().