Gamma ray detector specially for close range protective pipeline

Abstract

The invention discloses a Gamma ray detector specially for a close range protective pipeline, comprising a source machine, a Gamma ray source, a placement machine and lead rubber, wherein the source machine comprises a Gamma ray source storage chamber, a locking device, a Gamma ray source channel, a pull rod and an interior exposure window, the Gamma ray source is arranged on the pull rod, the Gamma ray source is arranged in the Gamma ray source storage chamber when in the non-working state, the Gamma ray source channel is arranged at the middle part of the source machine, and the interior exposure window is arranged at the middle bottom of the Gamma ray source channel; and the placement machine is a circular arc metal casing in appearance, the lining is a thin lead plate is lined in the placement machine, and a movable rectangular window is arranged at the middle part of the placement machine. By adopting the detector disclosed by the invention, detection operation can be synchronouswith mounting construction, thus all-weather detection can be realized; radiation dose to detection personnel can be effectively reduced, thus the detector has the unique advantage when being appliedto detection at high attitude and in small regions; and no special measure is required during the detection process in a special area and a densely populated area, thus time and labour can be saved and many funds are saved.

Description

[0001] technical field [0002] This patent relates to a non-destructive testing technology, in particular to a gamma-ray testing device for close-range protection pipelines. Background technique [0003] Radiographic testing is one of the most important non-destructive testing methods. Because it uses transilluminated film as the recording medium, the image is clear, the layers are clear, the defect image is intuitive, the shelf life is long, and the detection sensitivity is high, so it is suitable for testing various materials and thicknesses. Therefore, radiographic inspection is widely used in the process of inspecting welding quality. However, radiation is harmful to human health and requires effective protective measures. For this reason, it is impossible to work simultaneously with other types of work. In the construction and maintenance process of construction, oil, chemical and other fields, there is a long-term and insurmountable sharp contradiction between radi...

AI Technical Summary

Problems solved by technology

When the source is in the detection state, there is basically no shielding effect and there is no protective shielding during the transmission of the source from the host to the collimator. If the radiation dose of radiation meets the relevant national standards, the γ-ray operation safety control area needs to be very Large, especially Ir-192 and Co-60 gamma ray source operation safety area radius can be as far as 100 meters or more, which makes gamma ray detection operations usually arranged at noon or night when other on-site workers are resting, which has a great impact on the project schedule, Quality assurance, personnel safety, and timeliness of test results are all adversely affected

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