Rapid unfreezing method for metal water supply pipeline

Abstract

The invention provides a rapid unfreezing method for a metal water supply pipeline, and relates to the technical field of pipeline protection. The method comprises the following steps: determining the model, number and load duration of electric welding machines, and enabling the sum of the load duration of all electric welding machines to be greater than or equal to 100%; and the primary wire and the secondary wire of each electric welding machine are respectively connected and are connected with a power supply. And the primary line and the secondary line of each electric welding machine are connected with the metal surfaces at the two ends of the frozen pipeline correspondingly. And adjusting the current value of the electric welding machine to a rated current value corresponding to the load duration of the electric welding machine. The electric welding machines are alternately used in sequence for unfreezing, so that the continuous working time of the electric welding machines is smaller than or equal to rated continuous working time, and the intermittent time of the electric welding machines is larger than or equal to rated intermittent time. The method is easy to operate, the frozen metal pipeline can be effectively unfrozen, especially the hidden frozen pipeline can be unfrozen only by leaking metal faces at the two ends of the pipeline, large-area dismantling of the ground, walls and the like is avoided, the construction efficiency is improved, and the construction cost is saved.

Description

technical field [0001] The invention relates to the technical field of pipeline protection, in particular to a rapid thawing method for a metal water supply pipeline. Background technique [0002] In the case of poor protection of water pipes in the severe cold winter in the north, the problem of freezing of pipes in the water supply system of temporary buildings or projects under construction often occurs. For the frozen pipeline, under the condition of not hindering the construction, stack furnace ash on the pipeline to increase the temperature or use straw husk, sawdust, etc. to cover and heat it for a long time. But pay attention to the problem of water leakage after the pipeline is frozen. You can also use a quick solution of local hot water, fire roasting, and steam heating and melting, or use a resistance wire to wind and energize to heat and thaw. However, for buried pipelines, it is difficult to use the above method to thaw, and it is necessary to remove the groun...

AI Technical Summary

Problems solved by technology

Generally, the current is adjusted to the rated current value of the welding machine or slightly larger, but it is difficult to control the current adjustment of the welding machine, which may easily cause damage to the welding machine or slow thawing process

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