Research And Development Of Thin-film Evaporator CAD System

As a new type and highly efficient evaporating equipment, the thin-film evaporator(TFE) is widely applied in industries and great economy benefits has been broughtabout. At present, some progress has been made for the research and extendedapplication of TFE, but the foundational data of TFE are still limited. Many designs andproducts are obtained by the estimation of engineering magnification. There isn't a setof domestic integrated design calculation method for TFE. Also, the constructiondrawing is finished by the traditional manual method under AutoCAD 2000 drawingenvironment. This leads to great workload, low efficiency and the delay of design andexploitation cycle of products.In allusion to the TFE design status and the software project ideas, a logical frameof the CAD system of TFE is established in this paper. Thus, the design of calculationand construction drawing can be achieved automatically.The CAD system of TFE is studied by AutoCAD exploiting technology ActiveXAutomation of Visual Basic 6.0 on Windows platform and under AutoCAD 2000drawing environment. The parametric design technology and Microsoft Office softwareare used in the system. The major contents are as follows.1. Based on the 9th "Chemical Engineering Handbook", the process calculationprogram is compiled by use of iterative method;2. Based on GB150-1998 "Steel Pressure Vessel" and "Mechanical DesignHandbook", the program of main pressured components design of TFE iscompiled ;3. In terms of the characteristics of TFE, the parametric design of part drawing,component drawing and the assembly drawing of TFE is obtained throughclassification parametric drawing strategy;4. A new trimming and hiding method of plane drawing by using the AutoCAD2000 interior command "Boundary" and "Trim" is put forward. In this method, thesolving of intersections, judge and trimming are finished by AutoCAD, and the istable performance, high efficiency and simple design program has been obtained.5. The data saving and query of the system are finished by ADO Data technology.ADO Data is one of the efficient, simple and powerful technology dealing withdata. The connection with the data supplier can be established quickly by ADO(ActiveX data object), and the DBMS program can be made using the least code.Based on the above design technology, the CAD system of TFE is developed. Thedesign cycle of the products can be significantly shortened, the design efficiency can begreatly enhanced and the popularization application of the TFE can be quickened by thesystem therefore. It is of high application value of engineering.