Come on, it will jump automatically when it is full. At present, self-sealing refueling guns are widely used in gas stations, which will automatically trip when the oil is full. The self-sealing refueling gun has an independent and closed pressure-sensitive working system, which is integrated with the gun body. When the main valve of the oil gun opens the high-speed oil flow through the backflow valve, negative pressure will be generated in the pressure-sensitive system due to the special structural design of the backflow valve assembly.

Domestic development status quo

In China, gas stations have experienced the development process from less to more, from decentralized operation to large-scale operation, from single economic component to multiple economic components, from experience management to professional management, and from single variety management to diversified operation.

According to the analysis, with the rapid development of China's national economy, the continuous improvement of transportation infrastructure and the rapid increase of the number of motor vehicles, gas stations have become an indispensable part of people's lives.

In 1950s, there were only about 70 gas stations in China. There were less than 200 in the late 1960s; In the late 1970s, it grew to about 600 seats; From 65438 to 0985, there were about 3600 gas stations in China. 1990 ended with more than 5,000 seats; 1993 soared to around 38,000; 142,600 by the end of 1996. By the end of 2000, there were more than 80,000 gas stations in China.