Detailed explanation of the structure moistening principle of the building regulating box in Linshu County
The principle of automatic switching of pressure regulating road is different. Under normal circumstances, the controller controls the regulating valve of the main pressure path to the downstream pipeline to ensure the downstream gas supply pressure.
At the same time, the control valve of the standby regulator is closed by the controller. Once the pressure control valve of the main pressure road is all broken down, the outlet pressure of the whole station rises to the pressure setting value of the main pressure road emergency shutoff valve, the main regulating road emergency shut-off valve is cut off; after that, the controller controls the work regulating valve of the standby voltage regulation Road to open and adjust the pressure to the downstream pipeline. At this time, the truncated valve (ball valve) before and after the main pressure regulating circuit can be closed, and the gas in the pipeline will be emptied, and the corresponding equipment of the main pressure regulating road shall be maintained.
Explanation: because of the increase of outlet pressure caused by the malfunction of the main regulator, the emergency shut-off valve will not be cut off. When the running road accident occurs, the outlet pressure is too high. When the outlet pressure reaches the cut off pressure of the running road, the reaction speed of the shut-off valve is high.