公开(公告)号：US11892101B1

公开(公告)日：2024-02-06

申请号：US18458134

申请日：2023-08-29

Applicant: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS

Inventor： Yapeng Cao ,  Guoyu Li ,  Wei Ma ,  Dun Chen ,  Kai Gao ,  Gang Wu

IPC: F16L3/02 ,  F16L1/026

CPC classification number: F16L1/026

Abstract: Embodiments provide anti-frost heaving supports and methods for crude oil pipeline crossing permafrost region. The anti-frost heaving support includes a support frame. An arc-shaped frame is installed on a top of the support frame. Two sets of adjusting devices are disposed on the arc-shaped frame, each set of the adjusting devices includes a pushing device fixedly installed on the arc-shaped frame. In the anti-frost heaving support, a piston plate compresses air inside the sealing frame so that a compressional force of an elastic plate and a stressed plate on the pipeline increases. When the compressional force increases, the elastic plate deforms to make a moving rod to move towards to an interior of the sealing frame. When moving on a tilted surface of a tilting plate, the moving rod pushes the tilting plate to move. The tilting plate pushes the sealing plate to be opened to release the air inside the sealing frame, thereby reducing the compressive force exerted by the stressed plate on the pipeline.

公开(公告)号：US11891771B1

公开(公告)日：2024-02-06

申请号：US18458262

申请日：2023-08-30

Applicant: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS

Inventor： Yapeng Cao ,  Guoyu Li ,  Wei Ma ,  Zhixiang Chen ,  Buxiang Wang ,  Dun Chen

IPC: E02D31/14 ,  E02D27/34

CPC classification number: E02D31/14 ,  E02D27/34 ,  E02D2200/1685 ,  E02D2600/40

Abstract: The present disclosure provides a device for preventing frost heaving and thawing settlement. The device includes a positioning cylinder, an upper cover, an anti-thawing settlement rod configured to prevent the thawing settlement, and an anti-frost heaving rod configured to prevent the frost heaving. The upper cover is sealingly assembled on a top of the positioning cylinder. A bottom of the positioning cylinder is provided with the anti-frost heaving rod. An upper portion of the positioning cylinder is provided with the anti-thawing settlement rod. The anti-frost heaving rod is provided upwards, and a bottom of the anti-frost heaving rod is rotatably provided on a mounting base of the anti-frost heaving rod through a first connecting screw rod. The anti-thawing settlement rod is provided downwards, and a top of the anti-thawing settlement rod is rotatably provided on a mounting base of the anti-thawing settlement rod through a second connecting screw rod.