Automatic cut-off device and method for mechanical traction type emergency cut-off valve of tank car

The invention discloses a tank car mechanical traction type emergency cut-off valve automatic cut-off device and method, and belongs to the technical field of tank cars. The tank car mechanical traction type emergency cut-off valve automatic cut-off device comprises a box body, a first sealing cavity is formed in the box body, and a connecting cover used for being connected with a universal pipe is fixedly arranged in the first sealing cavity and communicates with the first sealing cavity; the connecting cover is connected with the outlet end of the emergency cut-off valve, and the universal pipe and the emergency cut-off valve are communicated with each other. A detector for detecting the air pressure in the first sealing cavity is arranged on the connecting cover and is in telecommunication connection with a control module, and the control module is in telecommunication connection with an execution device for controlling the emergency cut-off valve to be automatically closed; according to the tank truck unl