X-ray work be done correctly

With the development of social economy and science and technology, X-rays have been slowly accepted by everyone since the beginning, and finally they have been widely used up to now. This change has brought great convenience to our life and work. X-ray screening has also become a hot job at present, and is widely used in airports, stations, hospitals, etc. So, how do we properly carry out and complete the X-ray screening work? Here we briefly introduce this, hope to help you better understand the X-ray screening work.

Analysis points are as follows:

✉ What is X-ray

✉ Application areas of X-ray screening

✉ How to do X-ray screening work

✉ Summary

What is X-ray

X-ray is an electromagnetic wave with a large energy and a very high wavelength. The photon energy of X-ray is tens of thousands to hundreds of thousands of times larger than the photon energy of visible light, and the wavelength is shorter than the wavelength of visible light. X-rays are particle streams that are generated by the transition of electrons present in an atom between two energy levels that differ greatly in energy. They are electromagnetic radiation with a wavelength between ultraviolet and gamma rays. So X-rays were originally used for medical imaging diagnostics and X-ray crystallography. However, studies have shown that X-rays are also radiation-damaging rays such as free radiation.

Application areas of X-ray screening

(1) Industrial use

X-ray penetration ability can be detected from hard foreign matter such as bones and plastics to various metal foreign objects with higher sensitivity and stability, helping you to improve the quality of finished products more effectively. Not only can detect foreign matter in food, including metal, glass, ceramics, stones, bones, plastics, etc., but also identify product defects, such as packaging cracks, bubbles, content defects, etc.; to achieve complete product testing. X-ray screening technology is widely used in the food industry, pharmaceutical industry, textile industry and integrated circuit board industries.

(2) Public security use

Some X-ray screening equipment are designed for tourist attractions, sports and cultural venues, conference centers, exhibition centers, luggage storage, shopping malls, hotels and other important places as well as for public security, courts, procuratorates, prisons, detention centers, stations, airports, terminals, etc. Security check.

(3) Medicine

① X-ray screening and diagnosis technology

This technique is also widely used in medical diagnosis, mainly based on X-ray penetration, differential absorption, photo sensitivity and fluorescence. Therefore, X-ray screening and diagnosis technology has become the world's first non-shaved viscera inspection technology.

② X-ray treatment

X-ray screening is applied to the treatment, mainly based on its biological effects. When X-rays of different energies are applied to irradiate the tissue of the human lesion, the irradiated tissue can be destroyed or inhibited, thereby achieving certain diseases, especially It is the therapeutic purpose of the tumor.

③ X-ray protection

At the same time of using X-ray, people have found problems that cause hair loss, skin burns, visual impairment of workers, leukemia and other radiation injuries. In order to prevent X-ray damage to the human body, corresponding protective measures must be taken. The above constitutes the three major aspects of X-ray application in medicine - diagnosis, treatment and protection.

How to do X-ray screening work

When X-rays are irradiated onto the living organism, the biological cells can be inhibited, destroyed or even necrotic, resulting in different degrees of physiological, pathological and biochemical changes in the body. Different biological cells have different sensitivities to X-rays and can be used to treat certain diseases of the human body, especially tumors. While using X-rays, people have discovered problems that cause hair loss, skin burns, visual impairment of workers, leukemia and other radiation injuries. When applying X-rays, attention should also be paid to damage to normal organisms. . So how do we do the X-ray inspection correctly?

1. Before starting

(1) Check the X-ray flaw detector operation box and the machine head, and install the power supply without any damage marks and the installation screws falling off and the wires being damaged.

(2) Do not use if the conditions of use do not meet the requirements of the non-destructive testing instrument manual.

(3) Select the appropriate exposure conditions according to the material and thickness of the test piece. When controlling the exposure conditions of the flaw detection, it must strictly meet the performance requirements of the equipment. After the flaw detector is positioned, it must be fastened with the corresponding positioning tool to avoid falling over.

2. Boot sequence

(1) Align the X-ray machine exit window with the work piece to be inspected, pay attention to the concentrator and the part to be inspected.

The direction is the same.

(2) Use the focus adjuster to adjust the X-ray machine concentrator to the center of the weld and the focal length of both. After the flaw detector is positioned, it must be fastened with the corresponding positioning tool to avoid falling over.

(3) Turn on the controller power switch, the power light is on, the cooling fan rotates, and “dd” is displayed. After about 10 seconds, “AA” is displayed, and the speaker emits continuous sound for 3 seconds, indicating that the controller works normally. If it is found to be abnormal, the power should be cut off immediately and the equipment department should be notified in time.

(4) Preset transillumination time: adjust the position of the timer to the desired exposure time.

(5)Preset transillumination voltage: adjust the position of the kV code disc to the required tube voltage.

(6) Press the high pressure button.