My first 7000m ultra-deep manned submersible will be launched next year.

Underwater depth 7000 meters with 700 atmospheres for 7 hours of continuous operation


"7000 meters manned submersible" 1:6 model reporter Zhou Weihai photo

Cui Weicheng, the first deputy chief engineer of the national “10th Five-Year Plan” 863 Program “7000m Manned Submersible”, said today: “China’s self-developed '7000m manned diving” in the “15 Years Achievement Exhibition of China’s Ocean Resources Research and Development” The device (referred to as 7000 meters HOV) has entered the final assembly stage and will be able to dive into the water next year.

In the face of the HOV model that resembles a small whale, Cui Weicheng demonstrated the principle of unpowered dive in deep submersibles. “It has two counterweights and a pressurized water tank. When it is necessary to dive, the pressurized water tank is filled with water and begins to dive; when it needs to hover in the water, it throws a counterweight. If the power is activated at this time The device, the HOV can start working; when it needs to float, it throws the second weight, and at the same time, adding air to the pressurized water tank, and discharging the seawater, it can float up." Cui Weicheng said that this design is to save the battery as much as possible. The energy makes the 7000-meter HOV work continuously for up to 7 hours under water.

Cui Weicheng told reporters that there are currently 5 manned submersibles available in the world, namely Japan’s “Deep Sea 6500”, the United States’ “Alvin”, the French “Nautilus”, and the Russian “Peace”. "" and "Mist" number. Their maximum deep dive depth is only 6,500 meters. Relatively speaking, the 7,000-meter HOV that China is about to put into use has a deeper dive capability, meaning it will withstand 700 atmospheres of pressure under water.

What's more worth mentioning is that China's 7000-meter HOV has a unique "suspended water hovering positioning ability for the target of operation", while other deep submersibles need to find a fixed fulcrum to start work during operation, which is undoubtedly A major technological advancement in the world of deep submersibles.

Since this is China's first ultra-deep manned submersible, the project team will fully consider the personal safety of the submarines. Cui Weicheng said: "We have communicated many times with the experts responsible for the 'Shenliu' astronaut safety system when designing the manned part. Our manned spherical shell is made of titanium alloy, which is equipped with a life support system and Two sets of oxygen supply systems are designed to be foolproof."

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