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 analyses 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.

Description

technical field [0001] The present invention relates to a weight balancer and a pipe joining method; and more particularly, to a weight balancer and pipe joining capable of reducing the load on pipes when setting and welding pipes in ships, factories, pipeline work sites, etc. method. Background technique [0002] Ships, factories, pipeline jobs, etc. have many light or heavy pipes. That is, the piping through which the different fluids, gases, electrical connections, etc. pass is as complex as a spider's web. [0003] In practice, because of the limited length of these pipes, the welding operator welds multiple pipes together to get the pipes to the desired length. [0004] In particular, even single pipes and heavy pipes used in main pipe lines are connected to each other to form relatively longer pipes, while being suitable for piping or piping engineering. [0005] Here, the reference pipe (hereinafter referred to as "first pipe") and the pipe corresponding to the obj...

AI Technical Summary

Problems solved by technology

[0009] However, such a manual pipe alignment operation is very difficult when the second pipe is long and heavy, and has the drawback that even if the operator is a The work time of aligning and welding these pipes is very long, especially when being out of balance causes the center of gravity of the second pipe to be off-center from the center of its shape

[0015] However, the pipe joining operation according to the prior art has a problem that not only the operation time is long due to the manual operation, but also the difference in welding quality depending on the operator's proficiency is very different.

[0017] However, the pipe joining method according to the prior art has an inconvenience that the huge pipe should be moved using a transportation device like an independent crane to correct the roundness, because the huge pipe has an extremely heavy weight such as about 600 kg and a length such as about 6 m, And there is a drawback that even if the operator is a skilled worker, the operation time for aligning and welding the pipes takes a long time due to the height, angle, position, vibration, etc. of the pipes because the center of gravity of the pipes differs according to the shape of the pipes due to the unbalanced state Volume center eccentricity such as elbows, elbows, T-shaped pipes, etc.

[0018] In addition, in order to prevent oxidation and nitrification during welding, expensive argon (Ar) is injected into all spaces inside the pipe, and the injected argon is exhausted into the atmosphere through the openings at both ends of the pipe, so there is a problem: The cost of gas tightening has increased

[0024] For example, prior art automatic pipe alignment methods have the drawback that the clamping position is unstable and the accuracy of correcting true circles or aligning pipes and fitting parts is relatively low, since there is no disclosure for balancing just before clamping Operation of the device

[0026] However, when the weight balancer is used in the prior art automatic pipe alignment device, the payload for the fitting part cannot be actively reduced and the fitting part cannot be supported while moving or rotating in translation corresponding to 6 degrees of freedom

In addition, the upper part of the weight balancer supporting the fitting part is fixed, causing friction between the fitting part and the upper part of the weight balancer as described above

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