Detachable and replaceable limit door for railway wagon

The utility model discloses a detachable limit door for a railway wagon, which comprises a bottom beam, a vertical beam, an upper limit plate, a support beam and a lower limit plate, the vertical beam is vertically arranged on the bottom beam, one end of the vertical beam is detachably connected with the upper limit plate, the support beam is horizontally arranged on the bottom beam, the lower limit plate is detachably connected with the support beam, one end of the lower limit plate is connected with the vertical beam, and the other end of the lower limit plate is connected with the vertical beam. A plurality of through holes are formed in the bottom beam, the supporting beam, the vertical beam, the upper limit plate and the lower limit plate, the upper limit plate and the lower limit plate in the limit door can be correspondingly replaced according to different limit measurement requirements, the limit device is simple in structure and small in adjustment difficulty, the measurement precision can still be g