Tanker’s “liquid cold coat”
In summer, when the outdoor temperature is as high as 40 °C, the driver sitting in the cab of the truck will be breathless by the heat from the engine. As for tankers in tanks for duty or exercise in deserts, swamps and highlands, they will be too hot to stand up. The temperature around the engine inside the tank is sometimes as high as 70 ° C ~ 80 ° C, the surface of the transmission is also very hot, despite the blockage of the insulation board, but the temperature inside the car is much higher than the outside of the car. Moreover, in order to protect against enemy nuclear weapons and biological and chemical poisons, the tanker must also close the lid of the turret. It can be imagined that in this boring, hot and impenetrable armor “fortress”, people are worried about how uncomfortable!
So scientists tried to deal with this heat wave attack. When the sweat is flowing in the hot weather, rub the face with a cold water or take a bath. The water takes away some of the heat on the surface of the human body, and people feel cool. Based on this principle, scientists have designed a “liquid cold coat.”
In the inner layer of the “liquid-cooled coat”, a small pipe is densely laid. The tanker wears it snugly, and as the water and alcohol mixture of the cooler flows through the pipe, the heat transfer effect will continue to remove the heat from the body. According to the test, people wear this wonderful “liquid cold coat”, even if it is 4 hours at 100 ° C, it does not matter. “Liquid cold clothes” can not only improve the combat strength of tankers in high temperature and humid environment, but also reduce the loss of water in the tank, greatly reducing the water supply burden of the logistics unit.
Diver’s “Jim Service”
Since ancient times, humans have been eager to sneak into the beautiful and rich sea to glimpse the scenery and secrets of the sea. However, there is tremendous pressure in the sea. The deeper the sea, the higher the atmospheric pressure. When the depth is increased by about 10 meters, the pressure will increase by 1 atmosphere. In addition, there are breathing problems under high pressure, and brain-breaking decompression sickness, which greatly limits the depth of human diving.
So, can you artificially create an environment with the same pressure as the ground in the depths of the ocean? Yes, put on this new “Jim” diving suit.
The style of “Jim suit” is a bit like a spacesuit worn by astronauts. It is a tightly sealed housing made of high pressure resistant magnesium alloy and weighs about 500 kg. Before the diver enters the water, he enters the shell from the helmet that can be opened, then tightens the helmet and is sent to the bottom of the sea by a crane-type submersible. Even in the deep sea, the diving suit still maintains an atmosphere of 1 atmosphere. After completing the mission, the diver can return directly to the ground from underwater without going through the decompression process.
Some people may suspect that the diver is still wearing this 500kg clothing. Please don’t forget that due to the buoyancy of water, the cumbersome “Jim suit” is only 20 kilograms in the sea. Therefore, the diver wears it in the deep sea, whether it is lifting the foot or extending the hand, it is as easy as the ground.
Of course, different parts of the helmet must use pressure-resistant transparent materials and several observation windows to facilitate the diver’s eyes. In addition, divers can also help them complete underwater work with two multi-function robots.
“Jim Service” has made a lot of contributions to the cause of human exploration of the ocean: it has assisted divers to work on the 600-meter deep seabed in the cold Arctic Ocean, and found the lost TV cable 400 meters deep in the Spanish waters. China’s Bohai Oilfield exploration work has played an important role. At present, the best “Jim suit” can work in deep waters over 700 meters. A female oceanographer in the United States, with the help of “Jim Suit”, dive to the depths of 381.25 meters in the Pacific Ocean, creating the world record for women’s deepest dive.
Modern high-speed fighters often make sharp maneuvers such as dive, sharp turns, and somersaults during intense air combat or aerobatics. When the aircraft makes a dive, pulls up and enters the rapid movement of the tendons, the pilot’s weight can be increased to 5-6 times, or even 7-8 times. At this time, the blood in the pilot’s body will quickly rush to the feet, so that the blood volume of the lower body suddenly increases, while the brain is severely ischemic, causing retinal anemia, causing “black vision” symptoms in aviation medicine, that is, physics. Said “overcharge phenomenon.”
To reduce the impact of the overload on the pilot, the pilot is to wear a peculiar trousers – “anti-wear”, which will block blood flow to the legs. Interestingly, the “anti-wear suit” was designed by the giraffe.
The head of the giraffe is more than 3 meters away from the heart. Needless to say, the blood is delivered to its brain, and the pressure on the heart is high enough. However, when blood flows to its head, blood pressure has dropped a lot, almost the same as humans and most mammals. Curiously, when the giraffe is drinking water, the blood pressure will naturally increase because the position of the head is much lower than that of the heart. However, this tall animal has no symptoms of cerebral hemorrhage and rupture of blood vessels. Scientists have discovered that the secret lies in the fact that the giraffe not only has a special “device” but also a thick layer of skin. When the head position is lowered, the skin will tighten the blood vessels to prevent a sudden rise in blood pressure.
“Anti-wear suit” is also called “anti-wear pants”. The commonly used capsule “anti-wear suit” is composed of several airbags that are connected together by the abdomen, thighs, calves, etc. The airbag is connected with an automatic device. Wrapped in a nylon cloth cover in the shape of a trousers. Once the pilot has an overcharge reaction, the airbag will automatically be filled with compressed air, which will pressurize the pilot’s abdomen and legs, slowing down the flow of blood to the lower part of the body, and facilitating the return of blood from the lower extremities to prevent severe ischemia of the head. The magical “anti-wear” eliminates the pilot’s over-load response, allowing them to fly safely on the blue sky.