Gas pipeline drainer with functions of current limiting and blockage preventing

The utility model relates to a gas pipeline drainer with functions of current limiting and blockage preventing, which belongs to the technical field of gas pipeline equipment, and is used for water draining and gas leakage preventing of a gas pipeline. The technical scheme is that: the gas pipeline drainer is formed by a drainer barrel body, a primary sealing water pipe and a secondary sealing water pipe, wherein the secondary sealing water pipe is a straight pipe placed vertically; an upper end inlet of the secondary sealing water pipe is arranged in the primary sealing water pipe, and is provided with a current limiting component; and an inlet of the current limiting component is opposite to the lower end of a dredge pipe on the upper part of the drainer barrel body. The gas pipeline drainer has the beneficial effects that: the secondary sealing water pipe is of a vertical structure and has large enough diameter so as not to be easy to block; the current limiting component is arranged on the top part of the