22/09/19
Importance of pipeline gas self-closing valve to indoor gas
After nearly 20 years of development, the self-closing valve has been very stable and mature in various aspects at present, and it still plays a role in the protection of indoor gas.
After nearly 20 years of development, the self-closing valve has been very stable and mature in various aspects at present, and it still plays a role in the protection of indoor gas.
From a technical point of view, the self-closing valve especially emphasizes the concept: it has the functions of automatic closing of overpressure, automatic closing of underpressure and automatic closing of overcurrent. The requirements of these functions actually mainly reflect the main manifestations of the current indoor gas accident. In the form of indoor performance, we know that on the one hand, it is the problem of the user end, and on the other hand, it is the problem of the transmission and distribution system.
The problem on the user side is mainly manifested in the use of the stove by the user. In this aspect, sometimes it is forgotten to turn off, sometimes it is automatically turned off, and sometimes it is immersed in water. These are currently relying on the mandatory clause of GB16410 "Household Gas Cookers", which is to extinguish the flame to protect the cooker. This requirement basically solves the hidden dangers of accidents.
However, on the gas supply side, the situation is more complicated. There may be problems with the quality of the gas supply, such as too high or too low pressure; there are also the aging and falling off of the rubber hose, and the rat infestation of mice. These phenomena can actually be reflected in the fluctuations and changes of the pressure and flow of the gas supply. From a management point of view, it is sometimes difficult to detect these situations in a timely manner, resulting in some hidden dangers of accidents.
In terms of symptoms, the hidden danger of this kind of accident is reflected in the overpressure on the one hand, and it is reflected in the excessive pressure on the pipeline. There are still many cases of overpressure, to give a few examples. One is a gas company in Yulin City, Shaanxi Province. The self-management household of its community experienced overpressure during the pipeline transfer and replacement process. Others are the aging of pressure regulating equipment, such as pressure regulators. The aging process is a process of slowly increasing the gas pressure. If there is no protection in the middle, it is still difficult to find.
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