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Cold area pipeline heat preservation system and testing method

A pipeline insulation and testing method technology, applied in pipeline protection, insulation, pipeline heating/cooling, etc., can solve the problems of unreliable fire insulation and difficulty in achieving expected results in tunnels in cold regions, so as to reduce energy consumption of insulation, facilitate installation and Maintenance and cost reduction effects

Active Publication Date: 2018-07-13
CHANGAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under ideal conditions, these measures can meet the requirements of antifreeze and heat preservation of pipelines. However, various problems occur in actual operation, and it is difficult to achieve the expected effect. At present, the fire protection and heat preservation in tunnels in cold regions are in an unreliable state, and there are potential safety hazards.

Method used

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  • Cold area pipeline heat preservation system and testing method
  • Cold area pipeline heat preservation system and testing method
  • Cold area pipeline heat preservation system and testing method

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Experimental program
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Embodiment approach

[0071] In order to achieve the above objectives, the implementation method of the cold zone pipeline insulation system of the present invention includes the following steps:

[0072] The first step is to investigate and investigate the on-site environmental temperature of the required insulation pipeline through field measurement and meteorological data investigation, and determine the law of environmental temperature changes along the pipeline layout direction. After investigating the temperature distribution in the direction of the pipeline, draw a temperature distribution map along the direction of the pipeline under extreme temperatures in order to determine the working range of the system; because the farther away from the opening in the tunnel and other underground spaces, the closer the temperature is to the annual average temperature. Not all pipe sections need insulation measures to avoid waste.

[0073] The second step is to calculate the heat loss in the air duct when di...

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Abstract

The invention provides a cold area pipeline heat preservation system and a testing method. A pipeline is wrapped by a plurality of joints of air pipes, the head ends of the air pipes are connected with a draught fan to continuously lead high-temperature gas into the air pipes, the air pipes are fixed to the outer side of the pipeline through supports, air flues are formed between the pipeline andthe air pipes, and the high-temperature gas continuously heats the pipeline in the air flues. By means of the system, the anti-freezing guarantee can be provided for a cold area tunnel water fire control system in winter, accordingly, the situation that fire control pipeline is frozen due to severe cold, and guarantee is lost for the tunnel fire disaster safety is avoided, and the purpose of improving the reliability of the tunnel fire control system under the severe cold situation is achieved.

Description

Technical field [0001] The invention belongs to the field of tunnel fire protection, and in particular relates to a cold area pipeline insulation system and a testing method. Background technique [0002] China’s seasonally frozen soil area reaches 5.14×10 6 km 2 , Accounting for 53.5% of the country's total area. Building tunnels in these areas is a special project in infrastructure construction. With the continuous development of my country's infrastructure construction, the number of tunnels in cold regions is increasing. The biggest problem faced by tunnels in cold regions is tunnel frost damage. In recent years, my country’s investment in cold-region tunnel frost damage treatment has continued to increase. Even so, many tunnels are still suffering from frost damage and even abandoned. Cold-region tunnels are becoming tunnels. Important research topics in the world. Among the problems of freezing damage to tunnels in cold regions, the fire safety of tunnels in cold regions i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/18F16L53/00F16L59/07F16L59/14G01N25/20A62C35/58G06F17/18
CPCA62C35/58G06F17/18F16L9/18F16L59/07F16L59/14G01N25/20
Inventor 谢永利张梦泽王亚琼王志丰
Owner CHANGAN UNIV
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