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 emergency switching-off is executed, driving is carried out through the electromagnet, and the general service life reaches millions of times; besides, the electromagnet is energized, and the situation that an
interlock driving device performs mistaken action is avoided; and the
shock resistance is high, closing performance is good, and real-time feedback of the valve state can be achieved.