在使用检查井钢模具施工时,由于模具会在不同的场合、不同的工作环境和不用的气候等条件下使用。这就要求了根据不同的方式来确定模具的厚度。下面就简单介绍几种计算模具厚度的方法。
When using the steel mould of inspection well for construction, the mould will be used in different occasions, different working environments and different climates. This requires different ways to determine the thickness of the mold. The following is a brief introduction to several methods of calculating die thickness.
一、通过把检查井钢模具的单位面积和最l大允许热损失控制得出厚度的方法称为热损失控制法,在传热方程式的帮助下能够得到模具的最l小厚度。
1. The method of controlling the unit area and the maximum allowable heat loss of the inspection well steel mould to obtain the thickness is called the heat loss control method. With the help of the heat transfer equation, the minimum thickness of the mould can be obtained.
二、通过计算检查井钢模具的年折旧费和能量损失量在内的年工作费用的方式确定其厚度。这种算出来的厚度被称为“经济厚度”,“经济厚度”结果就是年工作费用的最l小值。
2. Determine the thickness of the inspection well steel mould by calculating the annual working cost including the annual depreciation cost and energy loss. This calculated thickness is called "economic thickness". The result of economic thickness is the minimum annual work cost.
三、还能通过计算模具在使用过程中表层可能会达到的温度的方式来确定模具厚度。使用这样的方式确定厚度的依据是为了防止检查井钢模具在使用过程中冷媒管道外表出现结露现象和热媒管道外表由于温度过高出现烫l伤现象。
Third, the thickness of the die can be determined by calculating the temperature that the surface layer of the die may reach during the use. The basis of using this method to determine the thickness is to prevent the condensation on the surface of the refrigerant pipe and the scalding on the surface of the heat medium pipe due to the high temperature during the use of the inspection well steel mold.