Buried thermal pipeline refrigeration structure based on permafrost
A thermal pipeline and frozen soil technology, which is applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of inconvenient construction and high cost, and achieve the beneficial effects of reducing heat transfer downward, maintaining stability, and safe operation
Inactive Publication Date: 2016-09-07
NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
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Problems solved by technology
The existing measures are the earliest thermal pile technology used in Alaska, the construction is inconvenient and the cost is high
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[0016] In order to better understand the present invention, based on the climate characteristics of the Daxinganling region through which the Sino-Russian crude oil pipeline passes, the diameter of the crude oil pipeline of about 90 cm and the actual high-temperature oil transportation situation, the following examples are used to further illustrate:
[0017] Such as figure 1 As shown, a permafrost-based refrigeration structure for buried thermal pipelines is composed of automatic damper 1, filling 2, horn-shaped connecting pipe 3, natural ground surface 4, heating pipe 5, U-shaped ventilation pipe 6 and holding force insulation Layer composition. A U-shaped ventilation pipe 6 is arranged on the upper limit 7 of the frozen soil, and the diameter of the U-shaped ventilation pipe 6 is 30 cm. The horn-shaped connecting pipe 3 is connected to the U-shaped vent pipe 6, and the nozzle of the horn-shaped connecting pipe is equipped with an automatic damper 1. The U-shaped vent pipe 6 ha...
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The invention relates to a permafrost foundation refrigerating structure for a buried heat pipeline. The permafrost foundation refrigerating structure comprises a U-shaped ventilating pipe arranged above a permafrost table, wherein trumpet type connecting pipes are communicated with the U-shaped ventilating pipe, automatic air doors are placed at orifices of the U-shaped ventilating pipe, a heat pipeline is arranged in the U-shaped ventilating pipe, a bearing heat insulation layer is arranged between the U-shaped ventilating pipe and the heat pipeline, and filling is padded at the bottom of the trumpet type connecting pipes; each air door comprises a spring, a magnetic material, a rust-proof hinge, a door plate and a sealing washer, the corresponding orifice of the U-shaped ventilating pipe and the oval door plate are connected by the rust-proof hinge, the magnetic material and the spring are arranged on the door plate, the spring is arranged between the corresponding orifice of the U-shaped ventilating pipe and the door plate, and the sealing washer is mounted on the periphery of the door plate. With adoption of the structure, when the air temperature is reduced in cold seasons, the automatic air doors are opened, and cold air enters the U-shaped ventilating pipe and refrigerates the foundation; when the air temperature is increased in warm seasons, the automatic air doors are closed, and energy exchange between the U-shaped ventilating pipe and air is prevented. Safe operation of the pipeline is guaranteed, and the purpose that cold energy is stored in winter to keep stable permafrost foundation for the pipeline can be achieved.
Description
Technical field [0001] The invention relates to a permafrost-based refrigeration structure for a buried thermal pipeline to maintain the stability of the permafrost foundation for a high-temperature thermal pipeline. Background technique [0002] Permafrost is widely distributed in my country, accounting for about 22.3% of the land area. During the construction and operation of pipelines in permafrost regions, the temperature of the frozen soil foundation increased, which caused the frozen soil to melt and the foundation to sink, which threatened the safety of the pipeline. The existing measure is the hot pile technology first used in Alaska, USA, which is inconvenient and costly. my country has two oil pipelines located in permafrost regions threatened by the melting of the foundation. The proposed construction of the Ge-La oil pipeline faces the same problem. Therefore, it is of great practical significance to develop an economical, practical, convenient construction and eas...
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IPC IPC(8): E02D3/115E02D27/35
Inventor 喻文兵陈琳刘伟博易鑫
Owner NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS