Arc Gate online monitoring system: The ”Cloud Doctor” of the Steel Giant Bow

️️ Rainy night Terrors

“The hinge is as loud as a sharpening knife! "Chen Yong, the old squad leader of the Three Gorges Lock, rushed into the rain curtain clutching the walkie-talkie. Late at night during the flood season last year, the No. 2 arc gate suddenly screamed. He climbed up the 30-meter-high barrier wall with a flashlight, and the rain covered his eyes with lenses. When his fingers touched the hot bearing seat, the entire arc door suddenly trembled-the 400-ton steel giant bow trembled in the dark.

Such a thrilling moment has carved too many scars in the memory of the water conservancy.：
– The blind:The old master uses a screwdriver as a stethoscope, and his ears are attached to the steel beam to listen to internal injuries.
– Life-threatening physical examination: Workers tie ropes around their waists and hang in the air to check for cracks. When the wind is strong, people swing in the air.
– Terminally ill before treatment: When the arc door support hinge of a power station breaks, the wear has already exceeded the limit for two years.

The lesson of a hydropower station in Southwest China in 2020 was even more distressing: because no cracks in the arc door arm were found, the entire door collapsed in a heavy rainstorm. The maintenance team leader touched the twisted steel beam and choked: ”I found out three days ago, why is this! ”

Wukong puts a ”neural net” on the steel giant bow

The change started with several groups of electronic eyes that would ”snitch”. Walking into the central control room of Xiangjiaba Hydropower Station, the ”live medical examination” of the arc door was beating on the big screen.：

Tilt sensorLike a protractor glued to a giant bow, the door body is skewed and the hair is thick.；
Strain gaugeLike a painful nerve, the steel structure ”lumbar muscle strain" immediately lights up with a red light；
Laser rangefinderTransformed into a millimeter caliper, even a few centimeters of siltation in the door slot was cleared.

The most amazing thing isSmart water seal——When the rubber sealing strip wears out, it automatically sends a distress signal: ”The waterproof belt is about to wear out!" ”

The monitoring of the eastern line of the south-to-north water diversion is even more intelligent. The engineer builds a ”health file” for each arc door, and the system knows the equipment better than the old gate worker.：
“During the flood season last year, the system suddenly warned 'the temperature of the left hinge of the No. 3 arc gate soared’. Take it apart and find that the bearing is out of oil, and it will be dead after half an hour of turning! ”

Three benefits you can touch

Cure the disease and grab the gold for 72 hours
Hanjiang Cuijiaying Avionics has had the sweetness: the system alarms late at night ”the opening of the No. 1 arc door deviates by 5 mm”" The maintenance team arrived in the rain and found that three of the support hinge fixing bolts were broken! ”Two hours late, this door may have fallen into the river. "The chief engineer pointed to the surveillance screen and patted his chest.

Save real money
The Gezhouba lock has been accounted for: in the past, it was shut down for three days a month for maintenance, but now the failure is warned in advance. The reduced loss of grounding alone will be enough to install ten new systems in two years. The old Wang of the spare parts warehouse was happy: ”The bearing loss has been reduced by 40%, and the inventory has accumulated ashes! ”

The mobile phone is the mobile gate room
“Now checking the arc door is like swiping the circle of friends! "Xiao Zhou, the dispatcher of Taihuzha Station after 90, clicked on the APP. The pressure and vibration waveforms of the arc gate thousands of miles away beat in real time. She smiled and took a screenshot of the work group: ”The leader checks the post? The data can speak by itself! ”

️ Early warning runs faster than failure

Xiangjiaba's monitoring system has become a "prophet”. On a typhoon day last year, the system suddenly popped up: ”The pressure of the water seal on the right side of the arc door No. 5 is abnormal! ”
When the maintenance team rushed to the scene, the rubber sealing strip had squeezed out the cracks. The monitor wiped his sweat and was afraid: ”Half an hour later, the river water should be poured into the corridor! ”

A more divine self-study ability is growing. Through seven years of data accumulation, the Three Gorges System has summarized a unique law：
–When the water level of the reservoir drops sharply, the stress of the arc door arm increases by 15%
–The opening and closing exceeds 20 times a day, and the temperature rise of the lubricating oil of the hinge is accelerated.

“It is more careful than the twenty-year-old gate worker! "The technical supervisor pointed to the automatically generated "High Temperature Season Maintenance Guide" and gave a thumbs up. When the system pushed the ”support hinge bolt re-tightening plan”, the maintenance team leader Lao Li was convinced: ”This apprentice has become a teacher! ”

The future has come

The new system of Baihetan power station plays with ”black technology”-using ultrasonic waves to make a ”B ultrasound" for the 100-meter-deep underwater arc door, and the fatigue cracks in the steel plate have nowhere to hide. A certain lock at the Pearl River Estuary is even more advanced: Beijing experts wear VR glasses to "touch” the three-dimensional model of the arc gate, and even the thickness of the rust spots is truly felt.

When the first rays of sunlight in the early morning pass through the arc door that automatically sends a ”medical examination report”, when the maintenance vehicle presses the early warning navigation to go straight to the hidden danger point. Those figures hanging in the air ”auscultation” are gradually entering the historical photo album. And the new legend of the steel giant bow is continuing to be written in the flashing data stream-each set of green lights running safely is a silent love letter to Wanli Jianghe.