The straight line in the swing shadow is parallel to the east-west or north-south direction, indicating the horizontal swing angle, and the straight line in the swing shadow is parallel to the vertical pipe, indicating the downward or upward swing angle.
Extended data:
Drawing method of single line diagram
1. Find the starting point and ending point of the pipeline in the industry management table. The work management table is a table used to calculate the fittings needed on the pipeline and determine the starting point and ending point of the pipeline. Before drawing the pipeline single line diagram, confirm the starting point and ending point of the pipeline in the work management table. The starting point and ending point of a pipeline can be a device or another pipeline. In a word, according to the given starting point and ending point, the pipeline to be drawn can be quickly and accurately located in the pipeline layout.
2. Look at the drawings to determine the pipeline direction. As long as you identify a pipeline, you can easily find its direction on paper. General drawings will give the direction of true north, and the direction should be converted into the corresponding direction in the single-line diagram. As long as the corresponding direction is correct, there is no problem of wrong direction in the single-line diagram. Here, we should emphasize the two ways of turning up and down in the pipeline layout to distinguish.
3. After determining the direction of the pipeline, fittings will be added to the pipeline. According to the pipeline layout, the valves and large and small fittings on the pipeline can be directly drawn to the corresponding parts of the single-line diagram.
4. Mark the weld. After completing the above work, you can clearly see the position of the weld. Of course, if the pipeline is too long, it is necessary to increase the number of welds in the middle of the pipeline. Generally more than six meters, add a weld. Determine the position of welding joint and corresponding welding slogan in the table below.
5. Formulate corresponding standards In order to facilitate the positioning of the single-line diagram in the field, it is necessary to mark the pipelines or equipment corresponding to the starting point and ending point of the single-line diagram. At the same time, it is required to mark the diameter change and grade change in the pipeline, and the pipeline number of the branch pipeline connected with the return pipeline must be marked.
References:
Baidu encyclopedia-monograph
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Drawing a white single-line map of pipeline on site means to show the direction of pipeline on the map with a straight-axis profile, and to mark the special position, content and method of inspection with a road. As long as we grasp the following points and pay a certain amount of time and energy, we can draw a beautiful one-line diagram.
A: Good sense of direction and space: based on the average score of 120 degrees or above, east, south,
2. The concepts of elevation and coordinates: elevation reflects the vertical height, and coordinates reflect the cumulative length of the east, west, north and south on the plane. Having a concept of height and plane length before painting will make your painting more beautiful.
Accurate and rapid drawing of non-90 swing: the straight line in the swing shadow is parallel to the east-west or north-south direction, that is, the horizontal swing angle, and the straight line in the swing shadow is parallel to the vertical pipe, that is, the downward or upward swing angle.