Jacket telescopic join

The sleeve telescopic device is composed of theouter cylinder and the inner cylinder. The flange of the outer cylinder and theinner cylinder is equipped with a limit rod, and a limit block is arranged onthe inner wall of the outer cylinder. The outer cylinder and the inner cylinderare sealed by v-shaped rubber rings.

An improved sleeve telescopic is composed of anouter cylinder (1) and an inner cylinder (3), which is characterized in thatthe flange of the outer cylinder (1) and the inner cylinder (3) are equippedwith a limiting rod (5), the inner wall of the outer cylinder (1) is providedwith a limit block (2), and the sealing between the outer cylinder (1) and theinner cylinder (3) is realized by a v-shaped rubber ring (4).