class monitor
The monitor is used to monitor the working state of the system and transmit the state information to the alarm controller in the form of electrical signals. It mainly includes water flow indicator, valve limiter, pressure monitor, pressure monitor, air pressure holder and water level monitor. 1. The water flow indicator can convert the water flow signal into an electrical signal and be installed at the beginning of the main water distribution pipe or water distribution pipe. Its function is that when there is a fire, the sprinkler starts to spray water, or the pipeline leaks or the control center displays the area and floor where the sprinkler sprays water, which plays an auxiliary electric alarm role. 2. Valve limiter is a kind of travel switch, also known as signal valve, which is usually installed on the main control gate valve and large-diameter branch gate valve to monitor the opening state of the gate valve. Once it is partially or completely closed, it will send an alarm signal to the alarm controller of the system. 3. The pressure monitor is a kind of pressure switch whose working point can be adjusted within a certain range, which is often used as the automatic switch control device of the pressure stabilizing pump in the automatic sprinkler system.
announciator
Alarm is a device used to send out sound alarm signals, including hydraulic alarm bell and pressure switch. 1, the hydraulic alarm bell is an alarm device that sounds with the impact of water flow. It is characterized by simple structure, durability and reliability, high sensitivity and small maintenance workload, and it is a large number of missing parts in various automatic sprinkler systems. 2. The pressure switch is an electrical switch driven by water pressure or air pressure, which is usually installed and used together with the hydraulic alarm. The pressure switch closes the weak current circuit by hydraulic pressure to realize alarm. When the valve of the alarm valve is opened, the pressure water first enters the delay device through the pipeline and then flows into the inner cavity of the pressure switch, pushing the diaphragm to move upward, and the top column also rises at the same time, jacking up the lower spring plate, closing the contact, connecting the circuit, and sending an electrical signal to the alarm control box to send an alarm signal, thus starting the fire pump.