This is the latest ** picture transmitted back from the Chinese space station at the end of January, the astronauts unscrewed the mechanical lock one by one, opened the hatch of the cargo spacecraft, and entered the interior of Tianzhou 7, where several tons of materials were placed, very neat.
Wear a protective mask and manually unscrew the mechanical lock).
Pay attention to a detail, when the astronauts first entered, they wore protective masks, which had the function of filtering harmful gases, and covered their eyes, nose and mouth tightly.
Why did astronauts wear gas masks to enter Tianzhou-7, is the air inside Tianzhou-7 poisonous?
All staff wear gas masks).
Tianzhou-7 is an improved fully sealed cargo spacecraft, which is the world's largest cargo capacity, the highest efficiency and the most functional cargo spacecraft.
This time Tianzhou 7 brought 56 tons of materials, the number of goods has more than 260 pieces, divided into three categories: one is the living materials of astronauts, the second is water, oxygen and other consumable materials, and the third is the space station maintenance and repair and experiment materials.
All 5Of the 6 tons of supplies, there are 24 tons are the astronauts' daily necessities, accounting for more than 40%, including various food and drinks, and 90 kilograms of fresh fruits. For example, these apples are protected with cushioning foam.
Vegetables and fruits are packed to the force).
Most of these materials were packed a month in advance, neatly stacked in spacecraft, and then transported to Wenchang, Hainan, and then launched into space.
So why did the astronauts wear gas masks to enter Tianzhou-7?
The reason is simple, it's all about making sure nothing goes wrong. Because the cargo spacecraft itself does not have a life support system, it must use the space station's air circulation and purification devices for ventilation. The air of the entire space station is circulated, but Tianzhou-7 is new, and if there is an accident on the road, such as a meteorite impact, or equipment failure, some harmful gases may be spread to the entire space station.
Although these are small probability events, the space environment is harsh, and the air is the core of astronauts' survival, so there is no room for mistakes.
Tang Hongbo wears a gas mask).
Therefore, although there are air sensors inside the Tianzhou spacecraft that can automatically detect toxic gases, every time an astronaut enters the interior of a new spacecraft, he must manually check it and perform three operations:
First,Wear a gas mask and open the hatch only after you have put it on.
Second,After opening the hatch, the ventilation pipe should be connected immediately to connect the Tianzhou spacecraft with the space station.
Jiang Xinlin connects the ventilation ducts).
Tang Hongbo wore a gas mask and connected one end of the ventilation pipe to Tianzhou-7; On the other end, Jiang Xinlin is responsible for connecting the space station and filtering out carbon dioxide and other harmful gases that may exist in the Tianzhou spacecraft.
Third,Use a hand-held harmful gas detection device to quickly detect the gas composition in the Tianzhou spacecraft to ensure that there are no toxic gases.
Russian cosmonauts on the International Space Station, trained in protective masks)
During this inspection, the hatch is hidden to reduce direct air circulation. After an hour of waiting, if everything is normal, the astronaut can take off his gas mask.
By the way, in the event of a fire on the space station, these protective masks also have the effect of filtering smoke.
Once the air is safe, you can take off your respirator).
For example, if you are going to live in a house that no one has lived in for a long time, the first thing you do when you enter the house is to check the water and electricity, and then open the windows for ventilation?
The same is true for the space station, Tianzhou-7 is a new room, and it needs to be "ventilated" before it can be lived.
Therefore, not only did Tianzhou-7 enter with a gas mask this time, but every Tianzhou cargo spacecraft before, when astronauts entered, they had to test the air to ensure that there were no problems.
During Shenzhou XII, Tang Hongbo wore a protective mask).
This ** is during the Shenzhou 12 mission, Tang Hongbo wore a protective mask and entered the interior of the Tianzhou-2 cargo spacecraft. Tang Hongbo is the first astronaut to board the space station twice since the construction of the space station.
At present, Shenzhou 17 has been in space for more than three months, and their mission on the space station is halfway completed.
Now the space station has unlocked the "Year of the Dragon mode", because Tianzhou-7 has brought a lot of New Year's goods, so that they can prepare to spend the Spring Festival on the space station to welcome the arrival of the Year of the Dragon. What is in the Year of the Dragon gift package prepared for Shenzhou 17 on the ground? It will not be made public until the Chinese New Year.
Carefully dismantle the express).
In fact, their later tasks are still very heavy, such as performing out-of-cabin walks and checking the solar wings again.
The space station has been hit by micrometeorites several times before, and the surface of the solar wing has been hit with small holes that need to be repaired. There is also the possibility of a future impact on the space station, which cannot be taken lightly.
The International Space Station was hit).
This is the International Space Station was hit by a micrometeorite, the robotic arm was knocked out of a two-centimeter hole, this is still lucky, if the impact is not a robotic arm, but just hit the astronauts, or the core facilities of the space station, then there will be life-threatening.
Tianzhou-7 is also fully prepared for this kind of accident, and has sent a lot of parts and equipment to the space station to check and fill in the gaps. In addition, Tianzhou-7 also carried 1 set of cell life experimental devices, 1 set of uplink microfluidic chips, and a total of 61 uplink products, involving 33 scientific experiment projects such as space life science, materials, microgravity fluids and combustion.
When dismantling the express, my country's space station will also be a little "messy")
Some of the scientific research results of these projects have been successfully applied in the fields of chips, C919 large aircraft, and domestic engines, promoting the growth of high-tech employment, and it can be said that it is ultimately for the benefit of our ordinary people. I wish them all the best in their upcoming tasks and look forward to their triumphant journey.