Air lock

水平 · 发表于 2010-8-3 15:44

Airlock

An airlock is a device which permits the passage of people and objects between a pressure vesseand its surroundings while minimizing the change of pressurein the vessel and loss of airfrom it. The lock consists of a small chamber with two airtight doors in series which do not open simultaneously.
An airlock may be used for passage between environments of different gases rather than different pressures, to minimize or prevent the gases from mixing.
An airlock may also be used underwater to allow passage between an air environment in a pressure vessel and a water environment outside, in which case the airlock can contain air or water. This is called a floodable airlock or an underwater airlock, and is used to prevent water from entering a submersible vessel or an underwater habitat.

水平 · 发表于 2010-8-3 15:46

Use

Before opening either door, the air pressure of the airlock—the space between the doors—is equalized with that of the environment beyond the next door to open. This is analogous to a waterway lock: a section of waterway with two watertight gates, in which the water level is varied to match the water level on either side.

A gradual pressure transition minimizes air temperature fluctuations (see Boyle's law), which helps reduce fogging and condensation, decreases stresses on air seals and allows safe verification of pressure suit and space suit operation.

Where a person who is not in a pressure suit moves between environments of greatly different pressures, an airlock changes the pressure slowly to help with internal air cavity equalization and to prevent decompression sickness. This is critical in scuba diving, and a diver may have to wait in an airlock for some hours in line with decompression tables.

水平 · 发表于 2010-8-3 15:47

Applications

Airlocks are used in

aviation, certain airplanes are equipped with airlocks for skydiving, and/or emergency exits.
spacecraft and spacestations , to maintain the habitable environment when persons are exiting or entering the craft.
hyperbaric chambers, to allow entry and exit while maintaining the pressure difference with the surroundings.
submarines, diving chambers, and underwater habitats to permit divers to exit and enter.
torpedo tubes and escape trunks in submarines are airlocks.
cleanrooms, protected environments in which dust, dirt particles, and other con**inants are excluded partially by maintaining the room at a higher pressure than the surroundings.
hazardous environments, such as nuclear reactors and some biochemical laboratories, in which dust and particles are prevented from leaking out by maintaining the room at a lower pressure than the surroundings.
pressurized domes such as the USF Sun Dome and BC Place Stadium, where pressure loss would cause collapse of the structure.
electron microscopes, where the interior is near vacuum so air does not affect the electron path.
parachute airlocks, where airfoil collapse due to depressurization can result in dangerous loss of altitude.

chenay · 发表于 2011-8-19 21:12

气锁，隔离之用。

BRACKET · 发表于 2011-8-21 07:39

气锁嘛
modu code里应该是消防那章里的，俩门间距不应小于1.5M不必大于两米。有自非危险区域的通风，对级别高的危险区域通风保持正压，需考虑通风失效带来的危险区域级别上升的后果
知道的就这么多了！
楼下的兄弟继续！

道格拉斯 · 发表于 2011-8-22 10:17

空气开关。。。
擦、、、日常生活中也有听说吧。

[基础知识] Air lock