The importance of smoke detectors and how to install them
On January 6, a fire broke out in a residential building in Zhongshan District, Dalian. 15 firefighters fought for nearly 2 hours before putting out the fire. At 10:30 on the evening of January 6, a fire broke out in the elevator room of Unit 1, Building 13, South Yard, Yanzhuang New District, Fuyuan Road, Zhengzhou City, and dozens of fire trucks arrived at the scene one after another. At 0:00 am on January 7, the fire was finally extinguished and the residents resumed their activities. It is understood that the fire was in the elevator shaft on the 6th floor. Fortunately, no one was injured or killed in the fire, and the cause of the fire is under investigation. On January 7, Shaoxing, Zhejiang. On Shunjie Road, Development Zone, Shangyu District, a gas tank in a store along the street exploded and caused a fire. According to informed sources, the fire caused casualties. In response, the District Party Committee Propaganda Department will set up an investigation team. In just two days, many large and small fires have occurred. At the end of the year and New Year holidays, the weather is cold, and the amount of gas used for fire and electricity is increasing, especially at night when fires are prone to occur frequently. In daily production and life, you should always pay attention to fire safety and develop good fire safety habits. In addition, effective preventive measures and fire-fighting equipment are equally important. Smoke detectors, also known as smoke detectors, smoke detectors, smoke detectors, smoke probes and smoke sensors, are mainly used in fire fighting systems, but also in the construction of security systems . It is a typical equipment that has been converted from space firefighting measures to civilian use. The installation and use of smoke detectors can not only dispel people's worries, but also have the opportunity to eliminate fires in the bud and protect people's lives and property. The smoke detector adopts the principle of photoelectric smoke monitoring, with a built-in smoke sensor and photoelectric smoke device. The smoke moves upwards. When it rises to the bottom of the ceiling and enters the detector, the smoke particles will scatter part of the light beam to the photosensitive element. The denser the smoke, the more light is scattered on the photosensitive element. When the light beam scattered on the sensor reaches a certain level, the buzzer will sound for detection. At the same time, the sensor converts the light signal into an electric signal and transmits it to the automatic fire detection system, prompting a fire here, effective in time The discovery of a dangerous situation will reduce the loss. The stand-alone smoke detector has the characteristics of accurate measurement, sensitive response and high stability; it complies with the fire protection GB4715-2005 standard, adopts ceiling-mounted installation, does not require debugging, and can detect fire in 360° in all directions; adopts patch technology It can resist the interference effect of EMI and RFI. Once the 'signal' of the burning of the object is 'capturedAccording to statistics, with smoke detectors, the proportion of casualties and property losses caused by fires has been greatly reduced. The National Fire Protection Association report shows that once a fire occurs in a house with the recommended number of smoke detectors, the chances of escape for people in the house will be 50% higher than that of a house without installation, so it is very good to install a smoke detector in the house. necessary. How to install the smoke detector correctly? First of all, choose a suitable installation location, usually installed on the ceiling in the middle of the room; secondly, fix the installation base on the ceiling with screws, and finally select 10~30V power supply, and conduct a simulated fire alarm test, test detection Whether the device can be used normally. Pay attention to the 485 signal line when installing. When wiring, pay attention to the two lines A/B not to be reversed, and the addresses of multiple devices on the bus must not conflict. Precautions for installation (1) The detector should be dustproof, and the dust cover must be taken off when the project is officially put into use. (2) When installed on the roof, if it is installed on a sloping or man-shaped roof, the detector should keep a certain distance from the roof. 0.3m~0.5m is appropriate. (3) Do not install in places where smoke is stagnant under normal conditions. Smoke detectors are highly sensitive to smoke. Therefore, it is possible to detect mistakes in places that are prone to smoke, such as kitchens and smoking places. (4) Avoid installing in places with large dust, water mist, steam, oil mist pollution, and corrosive gas. (5) The temperature and humidity of the working environment of the smoke detector should not exceed -10~50℃, and avoid installing in places where the relative humidity is greater than 95% and the ventilation speed is greater than 5m/s. (6) Avoid installing near fluorescent lamps. (7) It is recommended to conduct a simulated fire alarm test every six months to test whether the detector is working properly. (8) Do not cover the smoke detector with tape, plastic bags, etc.
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