Explosion proof fire detector is a fire detection device designed for high-risk environments, mainly used to detect and prevent fires, ensuring safe operation in places with explosive gases. By detecting physical quantities of fire characteristics such as temperature, smoke, gas, or radiation intensity, converting signals into electrical signals and triggering alarms, it is widely used in industries such as petroleum, chemical, power, and metallurgy to ensure safe use in environments with explosive gases.
working principle
Temperature sensing type: An alarm is triggered by detecting changes in the ambient temperature. When the ambient temperature reaches or exceeds the threshold set by the detector, the detector will emit a fire alarm signal.
Smoke sensing type: using the principles of scattering and absorption of light by smoke to detect smoke. When the smoke concentration reaches a certain level, the detector emits an alarm signal.
Flame type: It relies on sensors to receive specific wavelengths of light emitted by flames to determine whether a fire has occurred. Four channel infrared sensors receive infrared light emitted by the combustion of hydrocarbons, and combined with alarm logic judgment algorithms, it reports fire alarm information.
Image type: Based on video image analysis and processing technology and artificial intelligence analysis technology, it recognizes features such as flames and smoke in surveillance videos. For example, explosion-proof composite image type detectors use video image fire recognition algorithms to achieve early fire detection and video monitoring functions.
Main functions
By detecting the physical quantities of fire characteristics (such as temperature, smoke, gas, and radiation intensity) and converting them into electrical signals, an alarm signal is sent to the fire alarm controller.
Explosion proof design
Explosion proof type: prevents internal explosions from spreading to the external environment through a sturdy shell, suitable for high-risk areas such as petrochemical plant areas.
Intrinsic safety type: limits the energy of the circuit to a safe level, and even if there is a malfunction, it will not ignite explosive gases. It is commonly used in underground coal mines and other scenarios.
Increased safety type: enhances sealing and protection level on the basis of conventional design, preventing external combustibles from entering.
Types and Applications
Explosion proof type: suitable for places where explosive gases exist (such as petrochemicals, coal mines, etc.), preventing the transmission of explosive gas mixtures through explosion-proof structures.
Intrinsic safety type: prevents detonation by limiting energy, commonly used in local areas of explosion-proof places.
Point flame detector: detects infrared/ultraviolet radiation and quickly identifies fires such as hydrocarbons and hydrogen gas.
Linear smoke detector: monitoring smoke concentration, suitable for large spaces (such as shopping malls, tunnels) and flammable and explosive places.