Direct buried maintenance-free sleeve compensator to improve the operation of the pipeline network, further reducing engineering costs, the technical solution taken is a straight buried type maintenance-free sleeve compensator, using a triple sealing structure, a double combination sealing structure located between the jacket and the end tube, the other heavy sealing structure located between the outer cylinder end ring and the sealed guiding cover on the end tube. Heavy sealing consists of combination sealing rings, intermediate sealing covers, and floating pressure rings. A ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye kɔnɔ ye Tɛ̈n yenë yen luui, ka tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n yenë yen tɛ̈n A kɔnɔ ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ Tɛ̈n yenë yen luui thïn, a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n yenë a tɛ̈n Third double sealing structure consists of sealing guiding cover, outer pressure cover, plate root, and end ring protective cover components. Third double sealing structure consists of sealing guiding cover, outer pressure cover, plate root, and end ring protective cover components. Sealing guide set is placed on the heavy sealed outer side of the end tube, the outer pressure cover, the plate root is located on the sealed guide cover, the outer pressure cover presses tight disk root, the plate root on the surface closely attached to the end ring of the end ring protective cover component, the end ring protective cover component's protective cover and the flange of the jacket are connected to form the third double sealing combination structure, when working, the third double sealing structure isolates the outer media penetration, to reach the purpose of protecting the end tube sliding work surface, while the sealing guide cover also moves to the end tube position. Kä ye cɔl end ring protective components, ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka tɔ̈u ka A ye insulation layer ye polyurethane foam ye. The end tube surface spray coating of corrosion resistant abrasion reduction function, reducing the combination sealing rings, filling plate roots and end tube surface wear. The end tube surface spray coating of corrosion resistant abrasion reduction function, reducing the combination sealing rings, filling plate roots and end tube surface wear.

Direct buried sleeve compensator in construction also has many places to pay attention to, first one-way compensator's sliding sleeve should be installed at the medium's flow-in end, with the compensator's two ends phase welded tube segment for slope treatment, after welding to be carried out according to acceptance specifications for water pressure experiment, the pressure is 1.5 times the working pressure. Na ye tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛ