Mechanical gas well blowout explosion jet flow unblocking device

A mechanical gas well blowout explosion jet flow unblocking device belongs to the technical field of oil extraction processes and comprises an oil pipe nitrogen vehicle, a sucker rod nitrogen vehicle, a four-way connector, a hose, a hollow sucker rod, an oil pipe, a nozzle, an expanding packer, a pawl spring, a telescopic rod, a dead plug, a pressure relief electromagnetic valve and a blowout groove. Four channels of the four-way connector are connected with an oil pipe nitrogen vehicle, a sucker rod nitrogen vehicle, an upper oil pipe inner cavity and a hollow sucker rod inner cavity respectively, the hollow sucker rod is inserted into a cavity of the upper oil pipe, an oil sleeve annulus is formed between the hollow sucker rod and the upper oil pipe, and the oil sleeve annulus is connected with a pressure relief electromagnetic valve through a hose. An expanding packer communicated with the hollow sucker rod is fixedly arranged on the hollow sucker rod, the lower end of a tail rod of the hollow sucker rod i