论文部分内容阅读
油罐是用以贮存石油产品的罐状容器,一般多用钢板焊成,在油罐的顶部都要装上一种叫做呼吸阀的装置。油罐上为什么要装呼吸阀呢? 油罐装油时,一般是不能装满的,只能装到其容积的80％左右,即应留有一定的空间。在装油和卸油时,罐内的气体空间会不断发生变化。在卸油时,罐内油面逐渐下降,气体空间也就逐渐增大,使罐内形成负压,这就可能把油罐压瘪变形。而当装油时,油面会逐渐上升,气体空间也就逐渐
Tank is used to store petroleum products, cans containers, the general use of steel welding, the top of the tank must be fitted with a device called the breathing valve. Why install a breathable valve on the tank? Oil tank, the general is not full, can only be installed to about 80% of its volume, which should leave some space. During loading and unloading, the gas space in the tank will constantly change. In the unloading, the tank surface oil gradually decreased, the gas space will gradually increase, so that the formation of negative pressure tank, which may be the tank crushed deformation. When loading oil, the oil level will gradually rise, the gas space will gradually