Automatic spraying mechanism for bridge deck guardrail

The utility model belongs to the technical field of bridge guardrails, and particularly relates to a bridge deck guardrail automatic spraying mechanism which comprises a bridge deck and a guardrail, a control device is arranged in the guardrail and comprises a motor, a threaded rod, a forward and reverse rotation switch and a movable plate, the motor controls the threaded rod to rotate, and the movable plate is connected with the bridge deck. The threaded rod rotates to enable the moving plate to move horizontally, and the moving plate extrudes the forward and reverse rotation switch to control the motor. According to the automatic spraying mechanism for the bridge floor guardrail, when the guardrail is cleaned, a motor is started to enable a rotating shaft to drive a threaded rod to rotate, a moving plate drives a sliding frame and a water storage tank to move, the moving plate can move back and forth under the cooperation of two forward and reverse rotation switches, the motor is electrically connected with