Pneumatic valve ray detection technology

as the components of special equipment, pneumatic valve with electric power, petroleum, chemical industry, metallurgy, shipbuilding, nuclear power, and the vigorous development of the aviation industry, the role of more and more important, the safety of the developed countries in the world for its manufacturing quality has been quite seriously. Due to various reasons, our country in the years to the pressure pneumatic valve manufacturing qualification licensing and manufacturing quality supervision and inspection. Before because no good control quality of pneumatic valves, pneumatic valve leakage or pneumatic body fracture often appear accident, caused a great loss to people's life and property. Based on the ray detection technology application research in the field of pneumatic valve body test, for the effective control of pneumatic valve manufacturing quality and increase enterprise economic benefits, has played a good role in promoting. Manufacturing quality control of pneumatic valves, countries are enacted relevant regulations, formulate the corresponding standard, the standard also mentioned in the nondestructive testing in the applications of pneumatic valve inspection problems. But due to the change of the size and thickness of the pneumatic valve diversity, radiographic testing applications in the field of pneumatic valve inspection history is shorter, so ray pneumatic valve defects detection technology is not mature enough, there are a lot of randomness, easy to cause defects leak and cause economic waste phenomenon. This paper discusses in detail the nature of the ray, when rays penetrate the various effect and attenuation rule and the principle of radiography, in-depth analysis of the impact negative contrast, clarity, and the various factors of the particle size. Starting from the three major factors affecting detection sensitivity, the gamma ray source, focal length, transillumination mode, selection of film and back scattering, etc, provides for the choosing principle of transillumination; According to the universal formula of small defects, combined with the national standard of transillumination thickness ratio, various transillumination method is deduced, the minimum number of filmmaking. Ray was studied in the paper the characteristics of the equipment and apparatus, different transillumination mode of detection system was designed, according to the traditional transillumination method and techniques of this paper studies the transillumination defective pneumatic valve and radiographic testing, will receive the defects of negative contrast and comparison, the validation radiographed according to this article testing technology, can get a contrast and resolution, better the defects of the film, the particle size, and analyzes deeply according to the results summary, provides the pneumatic valve manufacturing enterprises can not only ensure the quality of the inspection, and to improve the economic benefit of ray detection technology. （ According to yongjiaxian sanjing pneumatic valves)