Jieco Intelligent Spark Detector Extinguishing System

Technical application scheme of spark detection and extinguishing system

Jieco intelligent spark detector is a high-speed, ultra-sensitive optical radiant energy sensor, which greatly improves the capture speed of light signals on the basis of eliminating interference noise. Designed to detect small sparks, or burning particles and smoldering materials in pneumatic conveying lines. Suitable for applications where the operating temperature is below 60 degrees. Output 24VDC switching signal or dry contact switching signal. Most applications require two spark detectors installed horizontally facing each other at 180 degrees. A single spark detection point cannot monitor the entire cross section of the pipeline; Therefore, two spark detection and extinguishing systems are required to work in principle

The spark detector is mounted 180 degrees face to face to facilitate testing from one spark detector through the lens of another spark detector. When there are sparks in the upstream pipeline of the dust collector passing through the spark detector, the spark detector detects the spark within 60us by infrared scanning, and feed-back the signal to the controller, which will then open the high-speed solenoid valve installed on the high-pressure extinguisher nozzle within 20us. The high-pressure water flow impacted by the solenoid valve shoots out arc high-pressure water mist within about 200ms, and extinguishes the sparks in the pipeline.

Spark detector reaction time 60us+ controller processing time 20us+ spray device opening time 200ms+ water ejection time 68us=290ms, the reaction time of the whole system is 290ms. It can effectively extinguish the spark in the shortest time, with the least spark and the least harm, and achieve the purpose of protecting the dust removal equipment and the safety of life and property of the whole plant.

Spark detection extinguishing system workflow diagram, system page

The Jieco Mars probe is installed in the main pipeline, and the high-pressure extinguishing nozzle is installed more than 8.5 meters away from the probe and more than 1.8 meters away from the dust collection box. The calculation of the above distance is based on the wind speed of the main air duct of 25 m/s. If the wind speed is greater than 25 m/s, the safe extinguishing distance between the probe and the nozzle needs to be extended.

The power supply specification is guaranteed to be a clean power supply, and the voltage is AC220V5%8A. The power supply can not be cut off 24 hours a day, (the power supply is an independent power supply, and must not be shared with the production equipment and the power supply of the dust removal electric box) The cable is a shielded control line, and the wiring requirements  cannot be parallel with other power wires, and the cable needs to be equipped with the corresponding protective sleeve.

If the pipeline inhales a spark, the control system will suck in the corresponding  relay and output a passive dry contact signal. This signal can be connected to the control system of the dust removal control cabinet, and the central dust collection fan is interlocked to shut down respectively, so as to ensure that the central dust collection equipment can operate safely.

System description diagram

①It is the first in the world to install the detection sensing device directly on the detection surface without the need for a light guide column, and never let go of any potential safety hazards.
②Adopt 304 stainless steel pilot solenoid valve, and 304 stainless steel high-pressure nozzle and obtain invention patent.
③Intelligent control of the electrical box, record all on-off time and spark occurrence  time and extinguishing time.
④The extra low water pressure alarm signal device for pressurized water ensures the safety of high-pressure water supply in real time.
⑤Anti-jamming hub box, which can filter external power interference and noise interference.

Installation Diagram

Jieco smart spark detector installation distance requirements

①The distance of the spark detector from the nearest branch pipe should be > 1.3 m.
②Distance from spray extinguishing device to spark detector > 8.5 m.
③The distance of the spray extinguishing device from the downstream  pipe elbow is more than 1.8 m, that is, the distance of the pipe diameter * 2.

 Arrangement and installation of spark detector

①Do not install the spark detector on the pipe elbow, but on the straight pipe part.
②Spark Detector Arrangement: Two spark detectors are arranged face to face horizontally on the same cross section of the pipeline,Keep in mind that it is not allowed to be placed at the bottom of the pipe.
③Use the special tool that comes with the goods to punch  a hole in the pipe and install it without entering the inside of the pipe.