Henan Coal Science Research lnstitute

Keming Mechanical and Electrical Equipment Co., Ltd.

ZZYB25 Active Explosion Suppression Device for Coal Mines

Article 186 of the Coal Mine Safety Regulations: “Mines with coal seams with coal dust explosion danger must have measures to prevent and isolate coal dust explosions. ……At present, the underground roadway mainly adopts mechanical explosion-proof devices, explosion-proof water tanks, explosion-proof water bags, rock powder sheds, etc. for explosion-proof protection measures, all of which belong to passive explosion-proof facilities.

The active explosion suppression device for coal mine is a device that extinguishes the flame flame of the explosion by spraying the flame suppressor through the explosion suppressor in the initial stage of the explosion, relying on the advanced detection of combustion or explosion information. This device mainly uses active detection of flame signals and automatic spraying of ultra-fine dry powder fire extinguishing agent, which can realize “active” suppression of flame combustion, isolate the spread of gas explosion, and effectively realize the safety of coal mine production. It is mainly used in areas (points) where gas and coal seam concentrations may exceed the limit and cause explosions, or areas where gas seam concentrations exceed the limit and may cause explosions.

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    The main implementation standards

    GB/T 3836.1-2021 Explosive atmospheres – Part 1: Equipment – General requirements
    GB/T 3836.2-2021 Explosive atmospheres – Part 2: Equipment protected by flameproof enclosure "d".
    GB/T 3836.4-2021 Explosive atmospheres – Part 4: Equipment protected by intrinsically safe type "i".
    NB/T 11126-2023 Technical specification for the application of active explosion isolation and suppression devices for coal mines
    AQ 1079-2009 General Technical Conditions for Automatic Powder Spraying and Explosion Suppression Device for Gas Pipeline Transportation

    Product functions and features

    Shock wave signal detection: high-frequency dynamic pressure detector, high frequency response, fast speed, accurate detection of shock wave signal generated by explosion.Flame signal detection: multi-band spectral detection, using imported photosensitive tubes and military manufacturing quality, to ensure that the flame sensor accurately detects flame signals.
    Visualized centralized control: Based on the visual comprehensive display, through accurate detection of fire data, equipment status display, equipment failure and other diagnostic analysis, intelligent early warning, troubleshooting and other automatic control are realized.Accurate analysis and reliable execution: The sensor transmits the detected fire signal to the controller, and the controller reliably drives the action of the explosion suppressor through precise algorithms and accurate logic analysis and judgment.
    Multi-channel linkage control: The system can be connected to up to 10 flame sensors and shock wave sensors, and can be driven at the same time to achieve fire extinguishing and explosion suppression control of multiple pipelines.Intelligent system operation and maintenance monitoring: Visualized monitoring technology is used to intuitively and comprehensively monitor the fire situation of gas transmission pipelines, comprehensively analyze and evaluate subsystems at all levels of explosion suppression, explosion arrest and explosion venting, and dynamically analyze the safety situation.
    • 1 Fast response time of sensor control: T<1ms
    • 2. Large-capacity lithium battery for backup: 10000mAh
    • 3 Multi-band spectral detection technology: 4-band spectroscopy
    • 4. Shock wave detection technology: high-frequency dynamic pressure detection
    • 5. Multi-channel sensor monitoring: up to 25 sensors can be accessed
    • 6. High fire extinguishing efficiency: aviation ultra-fine dry powder fire extinguishing agent
    • 7 Status display
    • 8. Anti-fouling and explosion-proof
    • 9 Device self-test
    • 10. System linkage
    • 11. System networking
    • 12 step-by-step triggers

    Where the product is installed

    1. Active explosion-suppression devices should be installed on the coal mining face, and active explosion-proof devices should be installed on the air inlet and return air roadways;
    2. For coal roadway and semi-coal rock roadway, active explosion suppression device should be installed on the excavation face, and active explosion-proof device should be installed on the roadway;
    3. Active explosion-proof devices should be installed in other roadways with gas and coal dust explosion hazards;
    4. Active explosion suppression devices should be installed in coal bunkers, coal transportation transfer points, crushing coal points, coal unloading points and electrical equipment concentration points.

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