Long-service-life light-maintenance comb tooth type telescopic device capable of preventing sediment deposition

The utility model discloses a long-life light maintenance style comb tooth type telescopic device that prevents sediment deposit, including first bridge notch and second bridge notch, the inside of second bridge notch is fixedly connected with evenly distributed second angle iron, the front end of second angle iron is fixedly connected with anchor plate, and the anchor plate is fixed with the first bridge notch and the second bridge notch. First limiting nuts are arranged on the two sides of the anchor plate, a supporting plate is arranged at the front end of the anchor plate, first limiting bolts which are evenly distributed penetrate through the inner wall of the supporting plate and are rotationally connected with the inner wall of the supporting plate, and the first limiting bolts penetrate through the anchor plate and the first limiting nuts and are in threaded connection with the anchor plate and the first limiting nuts. According to the utility model, the full-length gutter channel is hidden in the sec