It turns out they did it, "Electric Tower Flying" brushing the screen of the iron tower | helicopter | electric tower

A helicopter

Lift an entire transmission tower

Hover in the air after crossing the river channel

Weigh nearly 3 tons of iron tower

Precisely placed on the tower base across the shore

Assist in power supply repair work in disaster areas

This is the first helicopter tower lifting in China

Among them, the fastest lifting

It takes less than five minutes from lifting to precise docking

Netizens call: State Grid version of "Tuo" Tower Heavenly King

Hang the iron tower and take off steadily.

Fly over the river to reach the small island.

Collaborating with ground personnel to place the iron tower requires precise docking of 16 bolt holes with a diameter of only 26 millimeters.

This shocking scene

Occurred in Hailin City, Mudanjiang, Heilongjiang Province

Recently, heavy rainfall has caused damage to multiple transmission towers in the local area

Among them, the location of the 3 iron towers on the 110 kV sea long line

Surrounded by river water

The use of conventional maintenance equipment is restricted

Temporary power supply work has been initiated locally

But in order to restore normal power supply as soon as possible

State Grid Corporation of China has deployed heavy helicopters

And professional personnel to provide support

Why did you try to lift the entire tower for the first time?

How to install a 3-ton iron tower quickly and accurately?

Commander Wang Yi of this mission

Telling the story behind it to the front desk reporter ↓↓↓

01

First attempt at airdropping transmission towers

Why did they choose to face difficulties?

Wang Yi and his colleagues from State Grid Space Technology Company have been fighting for several days at the Fangshan disaster relief site in Beijing, using helicopters to transport supplies and rushing to transport multiple injured and pregnant women. On the 8th, he suddenly received a notice from the company that he needed to go to Hailin City, Mudanjiang, Heilongjiang to assist in the local power repair work.

△ Wang Yi

Affected by recent heavy rainfall, the Mudanjiang area in Heilongjiang Province has suffered from severe flooding, and multiple iron towers on the 110 kV Hailong Line have collapsed. Due to the rising water level, some damaged iron towers have become isolated islands in the water, and conventional maintenance methods are no longer applicable at this time:

Firstly, the flood has not yet receded, and the river flow is turbulent. Traditional methods such as shipping and floating bridges are unable to complete the cross river transportation of large tower materials and machinery. Furthermore, the accumulated water and silt around the tower base are over half a meter deep, and even if the transportation difficulties of tower materials and machinery are solved, the workers are unable to carry out tower assembly operations.

The Mudanjiang area in Heilongjiang Province has been severely affected by disasters

On the 9th, the repair team arrived in Hailin City and immediately carried out preparations such as surveying and connecting lifting equipment. The isolated island in the middle of the river is severely flooded, and artificial activities are limited. What is even more "deadly" is that Typhoon "Kanu" was heading north at that time, and soon it will bring a large area of heavy rainfall - leaving only one and a half days for them. If this window period is missed, the official power supply will have to be postponed again.

They decided to use heavy helicopters for the entire tower lifting and assembly operation.

This is a very difficult operation: it requires hanging a nearly 3-ton iron tower, hovering in the air for a long time, and the crew also needs to control the amplitude of the aircraft's swing; After transportation, the 16 bolt holes with a diameter of only 26 millimeters on the iron tower need to be accurately docked with the anchor bolts on the tower base

△ Anchor bolts

Wang Yi said that although they have carried out multiple power repair tasks before, they have only transported iron tower materials or other equipment, and the whole tower lifting has never been practiced, and there is no experience for reference in China.

"No matter how difficult it is, we must do our best. Even if we make the power supply one minute or an hour earlier, our work will be meaningful."

02

After multiple attempts at positioning

They completed the first complete tower lifting in China

On the afternoon of the 9th, Wang Yi and other staff took a boat to the isolated island in the water to clean up the tower base. At that time, it was raining intermittently in the air, with over half a meter of accumulated water in low-lying areas and sediment settling underwater. "Walking alone was already very tiring.".

Severe water accumulation around the tower foundation

On the other side, workers are working on the assembly of transmission towers across the river, with helicopters on standby, waiting for meteorological conditions to allow for the operation. "We have been keeping an eye on meteorological information and taking immediate action once we can take off."

△ Staff conducting tower assembly work

After the weather improved, Captain Shan Zhonghu took off and began attempting to lift an iron tower about 20 meters high. From the air, the coin sized anchor bolts on the tower base were even smaller than ants. He held the control lever and carefully adjusted the angle; The co pilot maintains communication with ground staff and acts as the captain's "other pair of eyes"; Ground staff are always ready to respond

The swing amplitude of the iron tower in the air was too large, and the reverse airflow had an impact on ground personnel... Despite being well prepared, they attempted three times but were unable to successfully dock. During this time, the captain had to maintain a high level of focus. His grip on the control stick was even numb, and he had to be taken over by the co pilot to hover in the designated safety zone.

Two captains executing tasks

Everyone was very anxious at the time: "If we don't install the transmission tower before the next heavy rainfall, the official power supply in the surrounding area may have to wait another week."

"I want to try again!" After a brief rest, the captain made another request to Wang Yi. After discussion and analysis, they set the flight altitude within the range of 60-70 meters and carefully communicated the details of each step of operation.

△ Wang Yi and the rescue personnel discussed the plan

The captain approached the tower base again, then slowly descended, and the ground staff instructed to adjust the position. When the tower approached the tower base, they used ropes to slightly pull it, and then immediately reinforced it... It took about 40 minutes, and they finally succeeded!

△ Helicopters lift iron towers

△ Rescue personnel fix the iron tower

Wang Yi said that everyone present was very excited at the time, "This is the first time in China that a helicopter has lifted a whole tower. We really did it!"

On the same day, they summarized their experience and the next day, they successfully completed the lifting work of the other two iron towers during the interval between the cessation of rain, and each time from lifting to precise docking, it took less than 5 minutes!

Wang Yi sighed, "This may be the fastest record in the world, and even we find it difficult to break it ourselves."

Everyone happily thumbs up

03

Next

To go to the most needed place for emergency rescue and disaster relief

After the emergency repair of the three transmission towers was completed, the staff took over the line repair work. It is expected that this morning, more than 22000 households in the surrounding area will resume normal and stable power supply.

Looking back on this rescue experience, Wang Yi sighed, "Within a limited time and under relatively harsh natural conditions, each of us has not given up, nor can we give up. Everyone is very excited and proud!"

△ Some of the rescue personnel involved in this mission

Wang Yi said that this experience has also accumulated valuable experience for domestic power grid emergency repairs. He hopes that with everyone's joint efforts, this seemingly extreme operation can be applied to more scenarios to improve the efficiency of emergency repair and rescue.

At present, the rescue mission of Wang Yi and his colleagues in Heilongjiang has come to an end. Subsequently, they will follow the deployment of State Grid Corporation of China and go to the most needed areas for emergency rescue and disaster relief.

Excellent strength

The courage to face difficulties

A determination to give it all

For the thousands of households behind us

Every rescue worker is doing their best

You've worked hard!

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