Vertical metal corrugated pipe bending test device

Abstract

The invention discloses a vertical metal corrugated pipe bending device for an anti-leakage test after a metal corrugated pipe is bent. The device comprises an oil pressure system and an output movingrod extending out of the oil pressure system, and a connector at a top end of the output moving rod is provided with two slots with fastening screw holes and is used for being connected with an arc-shaped pressing plate; the device also comprises a sample containing tank, through slideways for supporting rollers and supporting base plates to freely move up and down are arranged in edges of two sides of an opening of the tank, and a 3m steel ruler is bonded to an end portion of a side surface of each tank and used for span adjustment; and the sample containing tank is connected with the oil pressure system through a connecting frame. The invention provides a test span of the device and a set of arc-shaped pressing plate matched with the device so that a radian of the bent metal corrugatedpipe is uniform, accuracy of a test result is ensured, a personal error of the test is greatly reduced, and the device has an extremely high popularization prospect.

Description

technical field [0001] The invention relates to the field of detection of anti-leakage performance of metal bellows after bending, in particular to a vertical metal bellows bending test device. Background technique [0002] Metal bellows is a regular-shaped corrugated pipe. Commonly used metal bellows are carbon steel, stainless steel, steel-lined plastic, aluminum, etc.; metal bellows are made by spiral steel strips. The steel belt should be made of soft steel belt; in engineering construction, metal bellows are often used in the reserved holes for steel strands and other prestressing tendons in post-tensioned prestressed concrete structural members. Therefore, whether the sealing performance of the bellows is Good quality is directly related to the engineering quality of prestressed concrete. [0003] The test item "anti-leakage performance" of metal bellows mainly includes anti-leakage performance after concentrated load and anti-leakage performance after bending test. "...

AI Technical Summary

Problems solved by technology

[0003] The test item "anti-leakage performance" of metal bellows mainly includes anti-leakage performance after concentrated load and anti-leakage performance after bending test. "Metal Bellows for Prestressed Concrete" (JG 225-2007) No. Article 4.6 clearly gives the requirements for the anti-leakage performance of metal bellows, and the corresponding test method for anti-leakage performance is listed in Article 5.4, but for the anti-leakage performance test after bending, the specification only gives one The schematic diagram of the vice ideal and the requirements of the length of the test piece and the bending radius have not given the corresponding test device. Larger, the longest is 3m, so the more devices designed in each laboratory, the simpler the better, and most of them are manual, which makes the test have great loopholes and uncertain human errors, and the uncertainty of the test results cannot be effectively guaranteed, and It is not possible to conduct comparative tests between different laboratories

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