Due to the advanced equipment, the air compressor does not have a staff on duty. The pumper administers the pump house and the air compressor. The pumpman goes to the air compressor room every hour. After the meter reading is completed, the pump room is on duty.
If a compressor fails automatically, the compressed air pressure will drop quickly. When the wind pressure drops below, it will affect the normal production of float glass.
In order to solve this problem, we designed and installed a compressed air undervoltage automatic alarm device, its electrical principle is shown in the compressor undervoltage automatic alarm device working principle. The device is divided into two parts. 1 alarm signal box is installed in the pump room duty room o electrical contact point The pressure gauge is installed on the exhaust duct of the compressor room.
The lower limit value is set to the fault alarm action process. When the wind pressure in the exhaust air duct is lower, the electric contact pressure gauge is normally open.
The intermediate relay ZJ coil is energized and attracted.
The normally open point is closed.
At this time, the alarm bell indicator light is on, and the ringing light is on, indicating that the air compressor exhaust is under pressure, there is a shutdown phenomenon or other faults.
After hearing the alarm signal, immediately press the button on the signal box to make the intermediate relay ZJ pull.
Always open and close, self-protection.
The normally closed point is opened, the power of the bell is cut off, the bell stops, but the indicator light is still on. The pump room duty worker immediately goes to the air compressor room and turns on the standby air compressor to restore the wind pressure to the normal state. When the wind pressure rises above When the indicator is off, the signal box is in the normal state.
Signal device sound, lighting experiment signal device sound, lighting should be tested regularly, the experimental method will press the button, the normally open contact 3) closed.
The bell rings, the indicator light is on, and the test is normal.
Test face audio bell to cancel undervoltage report, map automatic alarm electrical schematic symbol name model use location single pole air switch signal box a button signal box a ZJ intermediate relay signal box indicator bell signal box electric contact pressure gauge small one air compressor The alarm device on the main exhaust line has been used since the monthly investment.
When the compressor is stopped for many times and the wind pressure drops to the time, the alarm signal device can send out an alarm signal, and the pumpman immediately handles the problem. The phenomenon that the production is normal due to the wind pressure and underpressure has never occurred.
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