线型及其含义：

比例：

水、汽管道代号：

工艺管道施工图常用图例：

水、汽管道阀门和附件图例：

给排水、采暖常用图例：

通风空调工程常用图例：

风道代号：

风道、阀门及附件图例：

风口和附件代号：

暖通空调设备图例：

调控装置及仪表图例：

各种执行机构可与风阀、水阀组合 表示相应功能的控制阀门。

消防工程基本图形符号：

消防工程辅助符号：

消防工程灭火器符号：

消防管路及配件符号：

消防工程固定灭火器系统符号：

消防工程灭火设备安装处符号：

消防设施：

消防工程自动报警设备符号：

管道图例：

管道附件：

管道连接：

管件：

常见阀门：

给水配件：

小型给水排水构筑物：

给水排水设备：

仪表：

管道和设备布置平面图、剖面图示例：

管道和设备布置平面图应按假象除去上层板后俯视规则绘制，其相应的垂直剖面图应在平面图中表明剖切符号。

标准层平面图

平、剖面示例

平面图、剖面图索引符号的画法：

平面图、剖面图中的局部需另绘详图时，应在平、剖面图上标注索引符号。索引符号的画法见下图。

索引符号的画法

内视符号画法：

当表示局部位置的相互关系，在平面图上应标注内视符号。

内视符号画法

系统编号：

1、一个工程设计中同时有供暖、通风、空调等两个及以上的不同系统时，应进行系统编号。

2、暖通空调系统编号、入口编号，应由系统代号和顺序号组成。

3、系统代号用大写拉丁字母表示，顺序号用阿拉伯数字表示。当一个系统出现分支时，可采用下图的画法。

系统代号

立管号的画法

竖向布置的垂直管道系统，应标注立管号，在不一致引起误解时，可只标注序号，但应与建筑轴线编号有明显区别。

立管号的画法

管道相对标高的画法：

1、在无法标注垂直尺寸的图样中，应标注标高。标高应以m为单位，并应精确到cm或mm。

2、标高符号应以直角等腰三角形表示。当面标准层较多时，可只标注与本层楼（地）板面的相对标高。

3、水、汽管道所标高未予说明时，应表示为管中心标高。

4、水、汽管道标注管道外底或顶标高时，应在数字前加“底”或“顶”字样。

5、矩形风管所注标高应表示管底标高；圆形风管所注标高应表示管中心标高。当不采用此方法标注时，应进行说明。

6、平面图中无坡度要求的管道标高可标注在管道截面尺寸后的括号内。必要时，应在标高数字前加“底”或“顶”的字样。

相对标高的画法

管道截面尺寸的标注符号及画法：

1、低压流体输送用焊接管道规格应标注公称通径或压力。公称通径的标记应由字母“DN”后跟一个以亳米表示的数值组成；公称压力的代号应为“PN”。

2、输送流体用无缝钢管、螺旋缝或直缝焊接钢管、铜管、不锈钢管，当需要注明外径和壁厚时，应用“D（或Φ）外径×壁厚”表示。在不致引起误解时，也可采用公称通径表示。

3、塑料管外径应用“de”表示。

4、圆形风管的截面定型尺寸应以直径“Φ”表示，单位应为mm.

5、矩形风管（风道）的截面定型尺寸应以“A×B”表示。“A”应为该视图投影面的边长尺寸，“B”应为另一边尺雨。A、B单位均应为mm。

6、水平管道的规格宜标注在管道的上方；竖向管道的规格宜标注在管道的左侧。双线表示的管道，其规格可标注在管道轮廓线内。

管道截面尺寸的画法

多条管线的规格标注方法：

多条管线规格的画法

风口、散流器表示方法：

风口、散流器的表示方法

定位尺寸的表示方法：

定位尺寸的表示方式

单线管道转向的画法：

单线管道转向的画法

双线管道转向的画法：

双线管道转向的画法

单线管道分支的画法：

单线管道分支的画法

双线管道分支的画法：

双线管道分支的画法

送风管转向的画法：

送风管转向的画法

回风管转向的画法：

管道断开的画法

平面图、剖视图中管道因重叠、密集需断开时，应采用断开画法。

管道断开的画法

管道在本图中断的画法：

管道在本图中断，转至其他图面表示（或由其他图面引来）时，应注明转至（或来自的）的图纸编号。

管道在本图中断的画法

管道交叉的画法：

管道交叉的画法

管道跨越的画法：

管道跨越的画法

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祖汪黎4333阀门图例向左转 - 向右转<br/>管道上的阀门F是代表什么阀门?
赵坚娜13033467507 ______ F表示自带压力计或温度计;至于是哪一类阀门,图上标识应为截止阀.

祖汪黎4333请教大家这个阀门叫什么?给排水图纸中的!谢谢
赵坚娜13033467507 ______ 1、上面的的是水表井 一般用在室外,下面的也是水表 一般用在室内.2、第一张图的水表前面的是止回阀,这个止回阀应该和水表换个位置,图上的止回阀的位置是错误的.因为止回阀防止水倒流,保护水表.

祖汪黎4333什么是旁通阀?工作原理是什么?我想要这个阀门的图纸上的画法?
赵坚娜13033467507 ______ 旁通阀即是在工作管路上可以提供另一条不受主阀门控制的一个阀门和其相关通道,示意图见附件.

祖汪黎4333分水阀开关横着还是竖着(分水阀开关横着还是竖着图片)
赵坚娜13033467507 ______ 大家都知道,冬天的气温对于我们人体而言是一个极大的挑战,因为冬天的气温特别的低,特别是北方地区.而北方居住者为了解决这一问题,就会给自己家里安装地暖了.1、分水阀开关是竖着的.2、其实地暖分水阀横着的话代表阀门已经关闭了,竖着的话代表已经打开了,所以我们平常看见的地暖一般都是竖着的.3、当然也有一些家庭在布置管道的时候出现了一些误差,所以地暖的分水阀也有可能会出现相反的现象.

祖汪黎4333持压泄压阀 - 消防图纸持压泄压阀用符号怎么表?消防图纸持压泄压阀用符号怎么表示
赵坚娜13033467507 ______ 液压机的液压原理图,其中的液压符号基本上很形象的,参照一下专业书籍的介绍大体可以明白.一般情况下的液压阀及液压阀的符号都是开关形式的,很容易懂.一般虚线代表控制油路,实线代表主体油路.

祖汪黎4333如何用CAD画好阀门?现在各大阀门制造企业,但凡有设计研发部门的
赵坚娜13033467507 ______ CAD只是一个制图软件 熟悉一下就可以 和阀门设计是两回事 不能说精通CAD就懂设计 CAD要精通首先要学的是机械制图 能完全理解6个面的视图 目前一般都是三维软件居多 Solidworks pre/e UG等 三维中可以直接转成CAD图纸 CAD图纸也可以直接导入三维 要是你很精通阀门 就是不会CAD 三维制图 也有很都厂需要的 设计不等于制图 制图不代表设计 制图只是把设计的理念表达出来

祖汪黎4333图纸上球阀的材质是A216Gr.WCB/304SS/PETF是什?
赵坚娜13033467507 ______ 你好,这个表示阀体用碳钢材质,阀芯及阀杆用304不锈钢,PETF应该是PTFE,是阀座的材质,中文名叫聚四氟乙烯,这是普通球阀的要求

祖汪黎4333机械设备安装图纸上气动阀门DN15FL300是什么意思机械设备安
赵坚娜13033467507 ______ 完成面的标高 30公分.

祖汪黎4333阀门有哪几种分类?
赵坚娜13033467507 ______ 按作用和用途分类:(1)截断阀:截断阀又称闭路阀,其作用是接通或截断管路中的介质.截断阀类包括闸阀、截止阀、旋塞阀、球阀、蝶阀和隔膜等.(2) 止回阀:止回...