Bursting Disc Devices Auto-cad Parametric Design And Graphics System Development

Bursting disc device is one of safety accessories to prevent pressure-tight device (pressure vessel, equipment and pipeline) from overpressure. To make it work properly, bursting disc devices must be designed and manufactured for a certain batch according to the working conditions. It is a taxing task to design the bursting disc devices. The designing work includes calculating design parameters, searching structural parameters and drawing some design drawings, etc.The design of bursting disc devices is usually based on manual work, which directly results in long design period, inefficiency and repetition. It can hardly meet the demand of manufacture. With the development of CAD technology, parametric drawing technology is more and more mature, the best way to improve design efficiency is to realize parametric drawing by further development based on AutoCAD.To improve the efficiency of the design, the CAD automatic design and parametric drawing system for bursting disc devices was developed. The system is make up of bursting disc devices automatic design module and parametric drawing module. The bursting disc devices automatic design module can calculate the thickness of the bursting disc, select right frock, design the structure and dimension of the holder, select standard accessory and design other needed parts automatically according to the set design conditions. All of the designed data is stored in a database and then transform to a drawing file. The parametric drawing module includes parametric programmes of LP,LC,LF,YC,YD and YE type of bursting disc devices. It has 37 programmes which can finish parametric drawing of all of these six types of bursting disc devices. Thus the parametric drawing module can finish the assembly drawing and accessory drawing of bursting disc devices automatically according to information from drawing file. A method to realize automatic parametric drawing to a scale was found through the bursting disc devices parametric drawing system, the problem of automatic drawing by scale and fill in title bar and list automatically is solved by this method.This technique can improve bursting disc devices design efficiency greatly. The drawings finished by this system can be directly used in the manufacture of bursting disc devices.