Long tube respirator assures safe operation of dredgers

There is a group of workers who have long been toiling in harsh underground conditions, ensuring the smooth flow of water pipes that serve thousands of households. Their work is not only physically demanding but also dangerous, and their safety must be prioritized. In some areas, the Municipal Facilities Administration Bureau has introduced advanced technology to enhance the safety and efficiency of sewer maintenance workers.

Detection System for Underground Gas

Recently, near People's Road under a tunnel, a new box was installed labeled as the "Sewer Flammable and Explosive Gas Monitoring System." This system helps monitor gas levels in sewers, which can be extremely hazardous if left unchecked.

"In the past, we had to rely on our senses and often had to enter the sewers to check for problems. The smell was overwhelming. Now, with this equipment, we don’t have to sniff the air as much," said Dr. Lei Xinggui, a sewer worker. The device is placed above ground because it cannot withstand the harsh conditions inside the sewer, and prolonged exposure would reduce its lifespan.

This detector allows gases from the sewer to be drawn into the system for real-time monitoring. If any dangerous gas levels are detected, the exhaust pump activates immediately to lower the concentration. If the situation worsens, the Municipal Facilities Administration Bureau’s monitoring center alerts the workers, allowing them to address potential dangers swiftly. With this technology, workers can focus more on critical issues rather than routine checks, and they can stay informed about gas levels before entering the sewer.

High-Pressure Dredging Vehicles Take the Lead

When sewers become clogged, manual cleaning used to be the main method. Workers had to descend into the sewers, using shovels to clear blockages—a labor-intensive and unhealthy process. Grease buildup from kitchens could make it nearly impossible to break through with traditional tools.

Now, the Municipal Facilities Administration has acquired high-pressure dredging vehicles that can spray powerful water jets. Once the location of a blockage is identified, workers simply connect a hose equipped with a drill bit to the vehicle and activate the high-pressure pump. The force of the water combined with the rotating bit can break down even stubborn blockages in minutes—something that used to take hours.

In addition to the high-pressure drill, the vehicle is also equipped with a hammer, vacuum suction, and other tools, making it a versatile piece of machinery for sewer maintenance.

New Equipment for Safer Inspections

Previously, experienced workers would sniff the wellhead and then carefully descend into the sewer based on their feelings. This year, the administration purchased five pipeline periscopes and four long-tube respirators. These tools allow workers to breathe clean air while inspecting the sewer, reducing their exposure to harmful fumes.

While these new technologies improve working conditions, the environment remains challenging. To prevent accidents, it’s essential that people avoid pouring harmful substances into the sewers. By being mindful of our daily habits, we can protect both the environment and the workers who keep our infrastructure running smoothly. It’s a small step that shows respect for their hard work and dedication.

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