Design method of constant-frequency gas-insulated X-ray flaw detector

Abstract

The invention discloses a design method of a constant-frequency gas-insulated X-ray flaw detector. The design method comprises the following steps of: (a) designing a high-voltage wire package of the X-ray flaw detector and a filament wire package of an X-ray tube to share one iron core to reduce the turns of a filament wire package; (b) forming a oscillation circuit by using distributed capacitors and distributed inductors existing because a X-ray generator is formed by connecting a high-pressure transformer (comprising a filament transformer) and the X-ray tube in parallel, wherein the oscillation circuit has an optimal resonance point so that the output voltage frequency of a control part is adjusted and fixed on the resonance point while the X-ray generator is transformed into a purely resistive load; and (c) stabilizing a ray tube current by adjusting the pulse width of the output voltage frequency of the control part because of the reduction of the filament turns. The invention changes the design idea of the X-ray flaw detector of the modern variable-frequency industry, overcomes all defects of the variable-frequency flaw detector so that the constant-frequency flaw detector can save electricity over 40 percent and has great through thickness, high sensitivity, little dispersion and environmental protection.

Description

technical field [0001] The invention relates to an industrial flaw detector, in particular to a design method of a constant-frequency gas-insulated X-ray flaw detector. Background technique [0002] In the process of industrial non-destructive testing of X-ray flaw detectors, the voltage at both ends of the X-ray tube should be adjusted according to the thickness of the steel plate to be tested. In order to meet the needs of small size, light weight, and portability, the current X-ray flaw detectors design the high-voltage transformer and the filament transformer of the ray tube to share the same iron core. In order to keep the filament voltage unchanged when the voltage is adjusted, it adopts frequency modulation way to achieve it. Since the X-ray generator is an inductive load, it has the following deficiencies, mainly as follows: first, the voltage adjustment range is narrow, and the film penetration thickness range is narrowed; The ray tube generates a lot of heat and ...

AI Technical Summary

Problems solved by technology

Since the X-ray generator is an inductive load, it has the following deficiencies, mainly as follows: first, the voltage adjustment range is narrow, and the film penetration thickness range is narrowed; The ray tube generates a lot of heat and is easily damaged; third, because of the change in frequency conversion, the dose of X-ray scattered flash is relatively large, the sensitivity is low, and the environmental pollution is relatively serious.

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