Research And Implementation Of Filling Helium Leak Detection Device

Filling helium leak detection equipment development in the1940s, filling helium leak detection equipment manufacturing in China started in the early’60s, after the application and development of more than half a century, has made brilliant achievements. From aerospace, military industry, nuclear industry, science and engineering to the light industry, medical, instrumentation, refrigeration, everywhere. As more manufacturing enterprises to seek more fast and more accurate detection means to replace the original, and backward way of testing, filling helium leak detection equipment shows its importance and irreplaceability.In this thesis, according to market demand and development of filling helium leak detection equipment, on the basis of analysis of the principle of the device, and specify the design and implementation process of this device. Design part respectively from the aspects of mechanical components and electrical control design and research, in terms of mechanical, mechanical principle and hardware structure of this device are outlined, the main content is according to the production process and technology requirements, the flow conductivity of the pipe, the pumping speed of the pump and the extraction time of device for analysis and calculation, so as to determine the hardware selection of filling helium leak detection equipment, to solve the mechanical composition of basic problems about working hours; In electrical design, device can be divided into operating mechanism, control mechanism, driving mechanism, actuator, collection agencies, and power six parts. Thesis focus on the control structure design and analysis, in determining the core controller, Programmable Logic Controller (PLC) and configuration software selection, on the basis of form a complete set according to process flow chart of the control program of PLC internal and mapping configuration monitor screen, make the device has the function of automatic operation, one key, moreover, can also through the industrial computer touch screen point move, realize manual control device hardware (such as pumps, valves, etc.), at the same time, combined with the use of configuration software, make filling helium leak detection equipment has the parameters change, fault alarm, data recording and printing, etc.Design test is completed, the device can be used in the analysis of components in air conditioning refrigeration industry, compared with the currently used by most enterprises is relatively backward method, filling helium leak detection equipment in sensitivity, work efficiency and have a new breakthrough in overhead cost. In addition, the design idea and design method of this device can also be applied to control of assembly line and other industrial production processes.