Gas alarm Baidu Encyclopedia knowledge introduction one of the gas alarm Baidu Encyclopedia knowledge introduction
The gas alarm is a gas leak detection alarm instrument. When the flammable or toxic gas leaks in the industrial environment, when the gas alarm detects that the gas concentration reaches the critical point set by the explosion or poisoning alarm, the gas alarm will send an alarm signal to remind the work to take safety measures, the gas alarm It is equivalent to an automatic fire extinguisher, which can drive exhaust, cut off, and spray systems to prevent explosions, fires, and poisoning accidents, thus ensuring safe production. Gas alarms can measure various gas concentrations. It is often used in chemical plants, oil, gas stations, steel plants and other places where there is gas leakage.
1 product definition
Gas is a combustible gas, and common gas includes liquefied petroleum gas, artificial gas, and natural gas.
The gas leak detector is a detector for detecting the gas concentration. The core component is a gas sensor. It is installed in a place where gas leakage may occur. When the concentration of gas in the air exceeds the set value, the detector will be triggered to alarm. External sound and light alarm signal, if connected to the alarm host and the alarm center, it can be connected to the network alarm, and can automatically start the exhaust device, close the gas pipeline valve, etc., to ensure the safety of life and property. In the civil safety prevention project, it is mostly used for household gas leakage alarms, and is also widely used in various refineries, oil depots, chemical plants, liquefied gas stations and other places where flammable gas leakage is likely to occur.
Do people really face a complete solution to the threat of accidents caused by gas leaks? According to
Gas alarm
According to experts, the use of gas leak alarms is one of the important means to deal with invisible killers of gas. Gas experts pointed out that carbon monoxide generated by gas leakage or exhaust emissions is the source of gas poisoning response. If a gas leak alarm is used, timely warning can be obtained. The relevant departments have also concluded through long-term tests that the efficiency of gas alarms to prevent carbon monoxide poisoning accidents is more than 95%.
2 product description
Detection gas: natural gas, liquefied gas, city gas (H2)
Working voltage: 220VAC or 110VAC, 12VDC-20VDC
Unique:
(1) New sensor drift automatic compensation function, which prevents false positives and false negatives
(2) alarm fault prompt function, so that users can replace and repair, prevent it from being reported
(3) MCU full control, working temperature is -40 degrees to 80 degrees
(The picture is provided by Li Dingfeng Company)
Networking method: wired networking (NO, NC)
At present, most common alarms use domestically produced devices in order to reduce costs. Many manufacturers have no industrial product design background, and the product design is guided by common electronic design ideas. The development process is not standardized, the test coverage is too low, and there are potential life safety hazards. Many manufacturers cannot provide basic 3C certification.
In order to improve the reliability of the product, the core components of the design, electronic chips and sensors usually need to be imported, and provide a variety of diagnostic and redundant designs to improve the safety and reliability of the system. For details, please refer to the relevant description of Innov Environmental Safety Technology.
3 installation instructions
1. Installation position of the alarm: within 1.5 meters from the radius of the air source, well ventilated:
(1) Liquefied gas is heavier than air and is installed approximately 0.3 m from the ground.
(2) Natural gas, city gas, carbon monoxide, etc. are lighter than air and are installed about 0.3 meters from the ceiling.
2, can not install the location of the alarm: the corners, cabinets and other places where the air is not easy to circulate; easy to be directly smoked by the soot.
3, gas alarms use a wide range of voltage, the common is 220V civilian voltage products, the general 12V voltage is relatively rare, the power take-off method is a telephone line interface, suitable for users with higher security requirements, installed in the bedroom, Small and practical! See the picture on the right (picture courtesy of Li Dingfeng)
Application production and sales of the alarms you want
1. Power light: Green light, light up after power-on, and extinguish when alarming.
Alarm light: Red light, it lights up when the alarm occurs, and goes out when the alarm is stopped.
2. Turn on the power, the green light will be on or flash for 3 minutes, and the alarm will start working normally.
3. When the detected gas reaches the alarm point, the alarm starts to alarm, the green light is off, the alarm light is on, and the buzzer sounds "B, B, B...", when the detected gas concentration falls below the alarm point. The alarm stops the alarm. (The carbon monoxide alarm has a delay function)
4. If the manual detection function is added, when the button is pressed, the green light is off, the alarm light is on, and the buzzer sounds "B, B, B...".
5. If the function of the exhaust fan is added, when the alarm is alarmed, the connected exhaust fan starts to automatically remove harmful gases.
6. If the function of the joint manipulator or solenoid valve is added, when the alarm is alarmed, the connected robot or solenoid valve will automatically close the gas valve, thereby cutting off the harmful gas source.
7. If the networking function is added, when the alarm is alarmed, the management center or control center receives the normally open normally closed (NO, NC) signal at the same time. (For the wireless function, the alarm host will receive 2-3 seconds of wireless signal)
After the alarm, a pair of relay passive contact signals (normally open, normally closed and jumper settings) can be output to control the ventilation and ventilation equipment or to provide normally open or normally closed alarm contacts for other equipment.
When the concentration of flammable gas in the environment reaches the set threshold, an audible and visual alarm signal can be emitted, and the passive contact signal of the relay can be output.
When the ambient flammable gas concentration drops below the response threshold, the detector in the alarm state will automatically return to normal operation.
Dongguan Hengda Gas Equipment Co., Ltd. is located in Shahukou Village, Changping Town, Dongguan City. It mainly produces: gasifiers, gasifiers, gas fittings, combustible gas alarms, valves, instrumentation, and gas pipeline design and installation. . Companies adhering to the "customer first, forge ahead" business philosophy, adhere to the "customer first" principle to provide our clients with quality services. Welcome patrons! Source of information: http://
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