Application of automatic leak detection in air tightness detection of civil air defense safety gate (liyanotte technology department)

Working principle:
 
1.1 machine
1.2 basic principles
This machine is used for the detection of specified protective airtight door and door actual leakage, for the actual detection of gas leakage exceeding the maximum allowable leakage products, sound and light alarm system.

The basic principle of 1.2.1 described as follows: the control panel and the PLC component of the control system to control flow proportional valve opening, makes ( protection) closed pressure chamber detection chamber pressure is maintained in the set range ( 50Pa or 100Pa ), at the detection value of the flow transmitter is at the testing pressure of super the actual amount of leakage of pressure chamber.

1.2.2 functional description:

.1 proportional control valve: intake air amount control makes the pressure chamber to detect intracardiac pressure remains constant;

.2: the amount of intake air flow transmitter feedback timely value;

.3 pressure transmitter: feedback pressure chamber cavity pressure timely value;

.4 HMI: monitoring panel for parameter setting and operation monitoring, is a man-machine interface;

.5 PC: programmable controller used for the whole testing process logic, which belongs to a control component;

2.setup

The 2.1 is connected with a power supply and air supply;

Power requirements: single phase power, 3 lines ( L, N, PE, 220Vac, 50Hz, 5A );

Source: dry, clean air, 6.0~8.0Bar, 1.0~6.0L/min.

Installation program:

2.1 leakage measurement ( preparation ): measurement of gas path connecting the pressure chamber shall conform to RFJ01-2002, RFJ04-2009 related requirements, the measuring device connection is completed, the first measurement of 16 measuring point of the adhesive strip compression, which minimizes the amount of compression should be more than 3mm, the maximum amount of compression of 10-12mm, when the door is in the glue the compression amount meets the requirement, can ventilation leakage measurement.

2.2 air leakage measurement operation: operation personnel to complete the above steps and confirmation, press the start button, open the door control system of proportional flow valve of overpressure in the chamber pressure, the pressure chamber of the pressure stability in 50 ( 100) +2Pa system, recording the data as detection door the gas leakage, gas leakage system according to the standard to judge the door detecting outcome and send the sound and light signals.
The machine testing process based on RFJ01-2002, RFJ04-2009 ( defense industry standards )


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