The safety and reliability of gas engineering are crucial in the infrastructure of modern cities. As a key component in the gas system, valves play an indispensable role. They play an important role in controlling and ensuring safety in various aspects of gas transmission, storage, distribution, and use. This article will explore several common valve applications in gas engineering.
1、 Valves in the conveying pipeline
1. Block valve: Installed at the starting and ending points and branch points of long-distance gas transmission pipelines, it is used to quickly cut off gas flow during pipeline maintenance, overhaul or emergency situations, preventing the spread of accidents.
2. Regulating valve: set between the high-pressure transmission pipeline and the urban gas distribution network, used to regulate the gas pressure and ensure the gas safety of downstream users.
3. Safety valve: When the pipeline pressure rises abnormally, the safety valve automatically opens to release some gas, preventing damage to the pipeline and equipment due to overpressure.
2、 Valves in storage facilities
1. Inlet and outlet valves: Connect gas storage tanks or underground gas storage facilities to transmission pipelines, control the filling and output of gas, and ensure that the storage capacity meets the demand.
2. Pressure balance valve: Maintain stable internal pressure of the gas storage facility to avoid the risk of equipment damage or leakage caused by excessive pressure fluctuations.
3. Emergency shut-off valve: In case of emergency situations such as leakage or fire, quickly cut off the gas source to prevent the accident from escalating.
3、 Valves in the urban distribution system
1. Pressure regulating valve: Installed on the urban gas distribution network, it regulates the gas pressure in different areas to ensure stable pressure at the user end.
2. Flow control valve: Adjust gas flow according to user needs to achieve supply-demand balance, avoid waste and shortage.
3. User side valve: Installed on the user's inlet pipe, it facilitates the user to switch on and off gas, and is also an important control point for gas companies to conduct meter reading and safety inspections.
4、 Valves in special application scenarios
1. Leakage detection valve: Installed in areas where leaks may occur, it monitors gas concentration in real time. Once a leak is detected, it immediately alarms and cuts off the gas source.
2. Anti reflux valve: prevents gas from flowing back during pressure fluctuations or pipeline damage, causing secondary pollution or safety accidents.
3. Electric/Pneumatic Valves: Remote control through automated control systems to improve operational efficiency and safety, especially in remote areas without human supervision.
There are various types of valves with different functions in gas engineering, but their core goal is to ensure the safe and stable operation of the gas system. With the advancement of technology, the application of intelligent valves and remote monitoring systems is becoming increasingly widespread, and the role of valves in gas engineering will become more intelligent and efficient. In the future, through continuous technological innovation and application optimization, valves will continue to play a key role in ensuring urban gas safety.
