Automatic film distributing device for inside of rectangular variable-section nuclear power pipeline

Abstract

The invention discloses an automatic film distributing device for the inside of a rectangular variable-section nuclear power pipeline. The automatic film distributing device comprises a film distributing part, a positioning system, a driving part and a supporting part; the supporting part comprises a fixed supporting rod, a sliding supporting rod and a rotating power assembly; the rotating power assembly comprises a sliding supporting rod sliding seat mounted on a mounting plate and a constant-force spring winding around a spring winding shaft; the sliding supporting rod slides relative to thesliding supporting rod sliding seat and is rotationally connected with the sliding supporting rod sliding seat; a rotating shaft of the sliding supporting rod is a supporting mechanism sliding seat rotating shaft; and the free end of the constant-force spring is fixedly connected with the supporting mechanism sliding seat rotating shaft. According to the automatic film distributing device, a longitudinal film distributing mechanism and a transverse film distributing mechanism are arranged on the mounting plate, one device is applicable to two film distributing conditions, and the film pressing effect is good while the film distributing position can be accurately located, so that detecting effect is guaranteed; and the constant-force spring penetrates through the mounting plate, so that the overall height of the system can be greatly reduced, and the device can adapt to the size of a detecting window and meet the requirement for change of the detection space.

Description

Technical field [0001] The invention relates to the field of nuclear power detection equipment, in particular to an automatic sheeting device inside a nuclear power rectangular variable cross-section pipeline. Background technique [0002] The longitudinal section of the nuclear power rectangular variable cross-section pipeline is as figure 1 As shown, it is a double-layer D-shaped section, and its transverse section is as figure 2 As shown, it is composed of an outer shell, an inner shell, a rib plate and a compensation ring. The material is all stainless steel 316L. The distance between the inner shell and the outer shell is between 180 and 280 mm. With the curvature, the distance between the two ribs is 300mm, the width of the compensation ring is 200mm and the thickness is 50mm. It is welded to the inner shell to form two longitudinal welds I and II. The compensation ring itself is also welded by multiple plates to form a transverse weld III. After all the welding is complete...

AI Technical Summary

Problems solved by technology

Due to structural constraints, these three welds can only be welded from the outside of the inner shell to the side of the closed space, resulting in the uneven surface of the welds on the side of the closed space that cannot be processed

At present, there is no device specially used for internal flaw detection of nuclear power rectangular variable cross-section pipelines. Due to the special shape of the closed space, the existing pipeline crawling robots cannot be applied to the internal flaw detection of nuclear power rectangular variable cross-section pipelines. The flatness of the wall surface is high, and it cannot adapt to the uneven working environment of the weld surface. The magnetic wheel crawler robot requires the inspection object to be ferromagnetic material, which cannot be used for non-ferromagnetic materials such as stainless steel, and cannot meet the requirements of nuclear power rectangular variable cross-section pipes. Requirements for internal flaw detection testing

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