Northeast Hebei gas regulator Co., Ltd.
Monitoring for the spare time we usually say, that is, in the work of the Run Feng gas pressure regulating valve failure, the downstream pressure to monitor the setting point of the pressure control valve of the Run Feng gas, the monitoring and control of the moistening gas pressure valve quickly switch to work state, immediately replace the main pressure regulator to adjust pressure, ensure the continuity and stability of gas supply]. It is divided into parallel monitoring and series monitoring according to monitoring mode.
2.2.1 parallel monitoring mode
In parallel, two models of the same type are used in parallel. As shown in Figure 5, a main road to moisten the gas pressure regulating valve, and one of the monitoring and control valve for the spare road.
Wenshan gas regulator, Ruifeng factory, provides professional configuration.
Figure 5 voltage regulation system for parallel monitoring
Wenshan gas regulator, Ruifeng factory, provides professional configuration.
In Figure 5, the above line is on the road, the following line is the backup road. Under normal circumstances, the P2 valve is closed because of the low pressure setting. When the overall fault of the working line is abnormal, the working path will be cut off automatically. At this time, the downstream pressure may be lower to the setting of the standby voltage regulator. The standby way will switch to the working state. The pressure setting value 1'2 of the standby way is the downstream pressure value.
The outlet pressure of the parallel control way is lower than the normal outlet pressure (P2 and the cutting pressure of the standby road is higher than the cutting pressure (P4>P3) of the working Road (ten), so that the spare road will not be cut off in the practical application when the working road is cut off, although the cutting pressure of the work road and the spare road is different, but the difference between the cutting pressure of the work road and the spare road is different. When the downstream pressure increases greatly, the reserve road may still be cut off at the same time, resulting in stopping gas. However, the parallel monitoring method is simple and suitable for small users, such as resident users and users who do not require high calorific value.
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