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China's self-made crane ship, the real national "heavy" instrument, with a total weight of 140,000 tons,
The advent of Zhenhua 30 has provided stronger support for China's salvage and rescue undertakings to go to the deep sea.
And many netizens said that this ship can sail around the earth for one and a half times when it is full of fuel.
Is Zhenhua No. 30 really that powerful? How many more places does it rank among the crane ships in the world in terms of displacement?
Zhenhua No. 30 landed
The role of the crane ship is mainly used for water operations, whether it is used to participate in marine rescue or marine construction projects, but the previous crane ships are those small and medium-sized crane ships, generally about 2,000 tons or 5,000 tons.
But the project completed in 16 years is not comparable to those small and medium-sized crane ships, a single lifting capacity is far beyond the previous crane, with a total weight of 140,000 tons, and the lifting capacity is certainly not bad, as the world's largest crane ship, its single-arm lifting 12,000 tons.
If you need to turn the direction in special circumstances, it can also be done, because it is equipped with the ability to rotate, and the rotating lifting weight is also 7000 tons, which is equivalent to the ability to lift dozens of A380 aircraft at the same time.
Information source: Global Network - China successfully built the world's largest crane ship: weighing 140,000 tons is a miracle 2016.05.16
When it sits there, it is simply a giant to the naked eye, and its weight has even exceeded the weight of all active aircraft carriers in the world.
Even its deck area is about the size of an aircraft carrier, and we all know that the deck area of the Shandong ship has reached the size of two football fields, but its area is a little larger than the deck of an aircraft carrier.
And compared to other crane ships, China's largest project is designed with its own automatic navigation ability, and when you see it, the most eye-catching thing is its big red hanging beam.
Although the work of the heavy ship is not only salvage at sea, but in order to be more convenient in the future work, they made a special hanging beam, which can ensure that the crane ship can effectively protect the sunken hull when it is working.
What large-scale projects have Zhenhua 30 been involved in?
The construction of the most famous Zhuhai-Hong Kong-Macao Bridge also had its participation, and it can be said that if it were not for its participation, the undersea tunnel at that time may not be an easy task to complete.
In the total length of 55 kilometers of passage, it takes a lot of engineering to make a successful connection, not only more than 30 immersed pipes are needed to connect, but finally they need to be connected with a connector, but the weight of the final joint is too large for ordinary crane ships to lift it, let alone work on the bottom of the sea.
At this time, Zhenhua 30 appeared, and under its lifting weight, the weight of the final joint was no longer a problem.
Information source: Science and Technology Daily - Zhenhua 30: "Needle through the sea", kung fu! 2017.05.03
But this work is not easy to do at all, because there is not only wind at sea, the passing ships will cause the extremely unstable water flow, although the weight of the crane ship is large enough, but the weight of the joint is also very large, when it is hoisted up very slowly, to ensure that the wind speed and the water flow will not be affected when docking, once there is a deviation and inclination, the loss in the formation is very large.
However, in the end, with the efforts of everyone, the final joint was successfully docked with an accuracy of 1.5 cm, not to mention ourselves, even people abroad will be amazed when they see it.
In order not to let the tunnel leak, so they must complete the welding task as soon as possible, and they bear a lot of psychological pressure, after all, it is a deep-sea environment, not everyone can stand it.
And last year, Guangxi Winter Zhenhua 30 appeared in Guangxi, and at that time it was about to participate in an offshore wind power project, which is the first such project in Guangxi, Zhenhua 30 needs to lift a 4,000-ton offshore booster station onto the already prepared project rack.
As for the project that made Zhenhua 30 famous, in 17 years, the crane ship salvaged a cruise ship that sank to the bottom of the sea, which was the "Sewol" that sank in Korea, and when the ship sank, it shocked the world.
Information source: Xinhua News Agency - Zhenhua No. 30 "helped the construction of Guangxi's first offshore wind power project 2023.11.26
Of the nearly 500 people on the boat, only more than 100 survived in the end, and even after the salvage was completed, nine people were missing.
When it was salvaged, it had been more than a thousand days since the "Sewol" was sunk, and Korea had not been able to salvage it for nearly three years, and it was also because this cruise ship was the largest ship in Korea at that time, weighing more than 6,000 tons, so it was not easy to salvage it smoothly.
However, there are many reasons for this, which are not clear, but there is one point, some people suggested that they should not salvage, because spending too much money will be considered to be a loss of money and labor, and the Korea military said to let it sleep forever, and there will be more controversy when salvage.
For various reasons, the cruise ship was salvaged after three years, and this time the salvage was carried out by the Shanghai Salvage Bureau of China.
Information source: Overseas Network - The South Korean military once advised Park Geun-hye to "don't salvage the Sewol": spending money is not pleasing 2018.07.13
After three years at the bottom of the sea, the cruise ship has long been covered with rust, and the wreck needs to be completely salvaged ashore, and the crane ship needs to lift the ship out of the water at a distance of 13 meters, but for the crane ship with a lifting weight of 12,000 tons, it is enough to complete the salvage task.
Why is Zhenhua 30 so powerful?
Different from the previous crane ship, this ship is not only different in weight and displacement, but also in the difference in thruster and positioning system, because the weight of the ship is large, so it directly brings the positioning function, plus the existence of 12 thrusters, so it can fully meet the dynamic positioning function.
The 12 thrusters include two 2,750 kW side thrusters, six 3,800 kW retractable full-swing thrusters, and four 3,250 kW pod thrusters.
But that's not all, this is not the final power of the ship, but there are currently 12 of them, in fact, there are two places reserved for thrusters on the ship, just to install larger thrusters later.
Under the multiple equipment, Zhenhua 30 will be more convenient when driving at sea, and it can be more accurate when operating, just like the docking work of the Zhuhai-Hong Kong-Macao Bridge at that time.
There is also Zhenhua 30 In fact, it is about the same as an aircraft carrier to a certain extent, and in terms of displacement alone, China's three aircraft carriers are not as large as it, and there is no aircraft carrier in the world with a displacement that exceeds it, after all, a displacement of 250,000 tons is not an easy thing.
Of course, if the displacement is large, its fuel tank capacity will naturally not be small, otherwise how can it run all over the country, it is said that it can run around the earth with a full tank of fuel.
The daily fuel consumption is not small, but it is not a big deal for the tasks it completes.
The emergence of Zhenhua 30 has made China reach a higher level in deep-sea salvage, and it also reflects the strength of China's independent construction, and its emergence is the strength to provide support for China's progress towards a maritime power.
References
Science and Technology Daily - Zhenhua 30: "Needle through the seabed", hard work! 2017.05.03
Xinhua News Agency - Zhenhua No. 30 "Assists in the Construction of Guangxi's First Offshore Wind Power Project 2023.11.26
Global Network - China successfully built the world's largest crane ship: weighing 140,000 tons is a miracle 2016.05.16
Overseas Network - The South Korean military once advised Park Geun-hye not to salvage the Sewol: spending money is not pleasing 2018.07.13