As the "main force" in industrial dust removal, the fog volume of the fog cannon machine is directly related to the dust suppression effect. When the spray volume of the equipment is significantly smaller than usual, it will not only lead to the failure of dust control, but also may cause mechanical failures due to abnormal pressure. Most users will directly contact for maintenance when encountering this situation, but they don't know that 80% of the fog volume reduction problems can be solved by simple troubleshooting.

Step 1: Check from the "Water Source" to Clear the Conveying Obstacles

The atomization effect of the fog cannon machine depends on a stable water supply. The most common causes are blockage by water source impurities or air leakage in the pipeline. Three fog cannon machines in a building materials factory suddenly had their fog volume reduced by half. After the maintenance personnel disassembled the filter, they found that the filter screen was completely blocked by sediment and rust in the water - it turned out that the factory directly extracted groundwater but did not clean the filtering device regularly.

To solve such problems, only two steps are needed: first, turn off the water source, disassemble the Y-type filter at the water inlet, and rinse the filter screen with a high-pressure water gun; then check the interface of the water pipeline. If bubbles are found at the interface, re-seal it with raw tape. It is worth noting that in areas with hard water quality, the filter should be cleaned once a month. When using well water or river water, it is recommended to install a pre-water purification device.

Step 2: Overhaul the "Power Core" to Restore Pressure Balance

When the water pump pressure is insufficient, the fog volume of the fog cannon machine will decrease like a "drizzle". After a trailer-mounted fog cannon machine in a mining area in Shandong worked continuously for 1200 hours, the fog range shrank from 30 meters to 15 meters. The inspection found that the water pump impeller was worn due to long-term inhalation of sediment, resulting in the pressure dropping from 1.2MPa to 0.6MPa.

At this time, it is necessary to disassemble the water pump body. If the impeller is slightly worn, the edge can be polished with sandpaper; if there is a crack, a new impeller needs to be replaced. At the same time, check whether the pressure regulating valve is stuck. Rotating the pressure regulating knob clockwise can increase the pressure, and counterclockwise can decrease it. During debugging, observe with a pressure gauge to ensure that the pressure is stable within the rated range of the equipment (usually 0.8-1.5MPa).

Step 3: Maintain the "Atomization Terminal" to Unblock the Nozzle Blockage

The nozzle is the "last pass" for fog volume output, and the small aperture is easily blocked by scale or impurities. The mobile fog cannon machine in a car factory workshop had uneven fog volume, and some nozzles did not discharge water at all. After disassembly, it was found that the water in the nozzle was not drained during the winter shutdown, causing the inside of the nozzle to freeze and expand, resulting in cracks, and impurities took the opportunity to block the channel.

Daily maintenance should be carried out every week: remove the nozzle and soak it in a 5% white vinegar solution for 30 minutes to dissolve the scale; use a special needle to clean the impurities in the aperture, and it is forbidden to use hard iron wire to avoid scratching the inner wall; when installing, pay attention to whether the sealing ring is aging, and replace it with a new one if necessary to ensure sealing. Before long-term shutdown, be sure to drain the water in the pipeline and nozzle to avoid freezing cracks or moss growth.

Case: Retrieve the "Lost Fog Volume" in Half an Hour

Two fog cannon machines in a logistics park in Pakistan are responsible for dust suppression in the open yard. One day, it was suddenly found that the fog volume was only one-third of the usual. When the maintenance master arrived, he first checked the filter and found that the filter screen was blocked. After cleaning, the fog volume recovered slightly but was still insufficient; then he detected the water pump pressure and found that the pressure regulating valve was loose, resulting in low pressure. After re-calibration, the pressure rose; finally, he checked the nozzle and found that 2 nozzles were blocked by catkins. After unblocking, the fog volume was completely restored. The whole process only took 40 minutes, saving 3 days compared with contacting the manufacturer for maintenance.

The reduction of fog volume of the fog cannon machine is not an "incurable disease", but a reminder from the equipment that it needs maintenance. From water source filtration to water pump pressure regulation, and then to nozzle cleaning, these three troubleshooting methods can solve most common problems. Developing the habit of "troubleshooting first and then maintenance" can not only save time and cost, but also keep the equipment in the best working condition, making every spray accurate and efficient.