The invention relates to a three-crawler-type intelligent flexible automatic
tractor for a large-size flexible
pipe. Crawlers are longitudinally and fixedly installed in a structural steel box body through structural steel frames. The number of the crawlers is three and the crawlers are uniformly distributed at a centripetal angle of 120 degrees. Flexible
pipe inlet through holes and flexible
pipe outlet through holes are coaxially formed in the two sides, corresponding to centripetal shaft parts of the crawlers, of the structural steel box body. A transmission device is longitudinally and fixedly installed in the position, on one sides of the flexible pipe outlet through holes, of the interior of the structural steel box body through a fixing plate. Universal transmission shafts are driven through a main motor by the transmission device in an engaged mode and drive reducers in an engaged mode. The output shaft end of each
reducer drives the corresponding crawler to rotate. Hydraulic synchronous clamping devices are fixedly installed on the radial structural steel frames of the crawlers. According to the three-crawler-type intelligent flexible automatic
tractor for the large-size flexible pipe, the
tractor is transmitted through the three crawlers, the
operating speed of the tractor is determined under the condition that a
servo motor drives the reducers to drive an outer gear ring, and torque is transmitted into the final-stage
reducer through the corresponding transmission shaft by three pairs of gears of the outer gear ring; the stability of the transmission
operation mode is improved a lot compared with that of a chain
driving mode, and more importantly, the
operating speed synchronism of the three crawlers is greatly improved.