The function and layout principles of the cut-off valve chamber

The functions and principles of the cut-off valve chamber are as follows:

It belongs to the knowledge category of long-distance natural gas pipelines. The details are as follows.

1. Function

As an important facility for safety control of long-distance pipelines, the line cut-off valve chamber has the functions of preventing the expansion of accidents, reducing pollution and loss of the transmission medium in the pipeline, and facilitating maintenance.

2. Principle

The site selection should conform to the direction of the line. The valve chamber should be located in an area with convenient transportation, easy access to roads, flat and high terrain, and good natural gas diffusion conditions. When selecting the location of the valve chamber, the principles of environmental protection and land conservation must be implemented, and forest land and cultivated land should be avoided.

The valve chamber with distribution function should be close to the user if the distance required by the grade of the area is met, and the site should be easy to expand into a distribution station to meet the needs of project construction and long-term development.

The valve chamber should not be located close to terrain or structures that can easily cause changes in line burial depth, such as ditches, highways, river embankments, etc.; the valve chamber should not be located in areas with frequent terrain changes, such as slopes, terraces, etc.

The valve chamber should avoid coal mine goafs, cultural relic protection areas, water sources, adverse geological conditions and sensitive areas such as floods and thunderstorms. In areas with severe wind and water erosion in collapsible loess areas, the location of the valve chamber should be away from gullies, seasonal rivers, steep slopes and other areas prone to terrain changes. The monitoring valve room should be located in an area with convenient access to external power.

The significance of the natural gas cut-off valve chamber:

With the continuous deepening of the concept of "safety first, environmental protection first" and the improvement of public safety awareness, once a leak occurs in a long-distance oil and gas pipeline, Safety accidents such as deflagration and pollution will cause huge losses to the country and people. As an important facility for safety control of long-distance pipelines, the line cut-off valve chamber has great protection significance.

In the process of site selection, there are problems such as hidden dangers of flooding, insufficient distance from high-voltage lines, too small distance from structures, too close to environmentally sensitive areas, and occupation of basic farmland. In order to ensure the legal compliance and safety of pipelines to the greatest extent, it is necessary to improve the valve chamber location selection method.