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手把手从0搭建自己的Excel自动计算表(2)|立式容器+卧式容器特定液位高度的容积计算

  • 2026-11-08 21:05:02
手把手从0搭建自己的Excel自动计算表(2)|立式容器+卧式容器特定液位高度的容积计算
今天同行交流时提到了已知液位高度求体积的计算,既然有需求,我们就可以试着用表格做一下,从而避免下次用的时候再重复大量的计算。
本合集文章面向会基础Excel操作,但从未写过复杂公式、没有任何编程基础的设备设计与报价人员,不用学习 VBA,不需要代码,只用内置公式搭建自动计算表,一次建好,后续改尺寸和液位高度自动出介质体积的结果,告别反复手工重算。
还是那句话:
(不喜欢看理论讲解的可以直接跳转到第三部分“搭建表格”照抄公式。)

一、需要知道的基础数据

建表前必须整理好三类输入参数,所有计算结果全部由这几组原始数据驱动:
  1. 筒体:内径、筒体长度。
  2. 封头:公称直径、直边高度;对应 GB/T 25198 标准。
  3. 液位:高度。

二、核心计算公式(仍是先讲原理再建表)

根据外形我们很容易看出,立式容器和卧式容器的算法是不同的。
先说立式容器:
立式容器是从下封头底部开始计算液位高度h,分三种情况来计算。
情况a:液位高度低于下封头切线时,体积=椭球的底部指定高度的体积。
情况b:液位高度高于下封头切线但不到上封头切线时,体积=下封头半个椭球体积+指定高度圆柱的体积。
情况c:液位高度高于上封头切线时,体积=下封头半个椭球体积+指定高度圆柱的体积+上封头指定高度的部分椭球体积。
这里的难点就是当液面在封头内部时的体积求法。封头需要用积分求,但由于我们用的是标准椭圆封头,椭圆长半径、短半径与封头直径有固定的倍数关系S=D/4=R/2(GB/T25198-2023《压力容器封头》),可以化简掉很多计算步骤。
推导过程:把坐标z从封头最低点向上量,0≤z≤S。椭圆封头是一个半椭球,其水平截面为圆。该圆半径随高度z变化:

也可写成:

高度z处的水平截面积为:
当液位为h,且h≤S时:
计算化简求得:
其中:0≤h≤R/2
下面再说说卧式容器:
卧式容器不用分情况,但是要分段计算。
体积=封头部分容积×2+筒体部分容积。
第一段,筒体部分的容积:
第二段,单个卧式椭圆封头的容积:
令t=(H-R)/R=(H/R)-1,则
头都大了。。。
> 重要说明:本章节Excel公式计算结果,仅适用于快速估算容积,不作为实际报检或者生产数据依据。

三、搭建表格

步骤1:搭建计算表

仍然在我们上次新建的表格文件中的sheet1里建立。
立式容器:
卧式容器:
本文相较于合集中的第一篇文章的内容来说,难度突然加大了很多,算是临时插入的穿越内容,暂不做详细解释了,等后期熟练了再回来看应该也能看懂。本文主要目的是先给需要的人解决当下遇到的问题,以后还是会循序渐进。
有需要这个表格文件的可以留言或者私信我免费发给你。当然,这些功能在容器设计助手小程序里都有相关的计算,甚至可以根据容积反算液位、任意换封头形式,大家也可以直接从微信小程序里使用相关功能。
大家晚安。
基本 文件 流程 错误 SQL 调试
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  4. 会话信息 : SESSION_ID=0083785a78cb38a0af256498a7c3e2c4
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0.093270s