Latching device and gas transmission station pressure regulation safety cut-off valve

The invention relates to a latching device and a gas transmission station pressure regulation safety cut-off valve. The gas transmission station pressure regulation safety cut-off valve comprises the latching device, a pressure sensor, an MCU, an electromagnet and a gate valve body, wherein the pressure sensor is connected with the MCU; the MCU is electrically connected with the electromagnet; a control end of the electromagnet is connected with an ejector rod; the gate valve body is connected with a valve rod; and when pressure measured by the pressure sensor exceeds a threshold valve, the MCU sends out an electric signal, the electromagnet is energized, the electromagnet drives the ejector rod, the valve rod falls off, and the gate valve body is cut off. According to the latching device and the gas transmission station pressure regulation safety cut-off valve, when abnormities like overpressure and pressure loss of downstream pressure are detected, the safety cut-off valve can be quickly cut off; when emerg