Video detection camera automatic centering device in pipe

The invention discloses an automatic centering device mainly used for a camera to detect videos in a pipe. The video detection camera automatic centering device in the pipe keeps the camera in the central position of a pipeline all the time. The centering device is mainly composed of a central cylinder, sleeves, springs, supporting rods and the like, wherein the camera is arranged inside the central cylinder, the two sleeves are arranged on the central cylinder, one sleeve is axially fixed, the other sleeve can slide freely on a central cylinder body, a supporting part is composed of three sets of supporting rods, the supporting robs are distributed in a 120-degree circumference mode, each supporting rod is composed of a supporting rod body, a wheel, a pin, a clamp ring and corresponding parts, the two supporting rods respectively arranged on the two sleeves are crossed and are connected through the pins, each supporting rod is provided with a small hole to fix a spring, the springs play a role in guaranteeing that the three sets of supporting rods are contacted with the pipe wall all the time, and through the assembly of different positions of three motion secondary connecting holes in the middles of the supporting rods, three connecting schemes of the supporting rods are obtained, and therefore the centering device is applicable to work in a large pipe diameter range.