Contact type probe mounting frame for vertical injury scanning and fixing system

Abstract

The invention provides a contact type probe mounting rack for vertical damage scanning. The mounting rack comprises a probe bracket and a connecting plate for connecting the probe bracket with a flawdetection vehicle, at least three probes arranged along the moving direction of the flaw detection vehicle are arranged on the probe bracket, and the probes comprise at least one transmitting probe orat least one receiving probe; ultrasonic waves emitted by the transmitting probe can be received by the receiving probe after being subjected to vertical damage inside a rail and two times of mirrorreflection on the bottom surface of the rail, and the multiple probes on the probe bracket are matched to scan vertical damage at multiple heights in a flaw detection area. The invention further provides a fixing system of the mounting frame, the fixing system comprises a probe frame fixedly connected with the connecting plate, the probe frame is arranged on a fixing frame, the fixing frame is fixedly connected with the flaw detection vehicle, and at least two ends of the bottom of the fixing frame are provided with walking wheels respectively. The mounting frame and the fixing system providedby the invention can ensure that the probes are centered and tightly pressed on the rail.

Description

technical field [0001] The invention relates to the technical field of rail flaw detection, in particular to a contact probe mounting frame and a fixing system for vertical damage scanning. Background technique [0002] During the welding process of the rail, due to the instability of the welding equipment, improper selection of process parameters, and the quality of the rail base material, defects may occur during the welding process, including bulky ones, such as looseness and slag inclusions, etc.; , such as micro-cracks, gray spots, unwelded, etc., in order to ensure driving safety, defects must be detected early. [0003] The current damage detection mainly uses ultrasonic probes. Because the medium inside the track is uniform, the ultrasonic waves will reflect on the mirror after encountering damage. Based on this principle, the current rail flaw detection method mainly uses multiple probes with different angles to emit ultrasonic signals. , when the ultrasonic signal...

AI Technical Summary

Problems solved by technology

[0006] Based on the above working principles, Chinese patent application CN106198760A provides a method and system for ultrasonic imaging detection of rail welds based on dual array probes, which realizes K-type scanning and serialization of rails through two sets of contact probes in different directions Taking K-type scanning as an example, one contact probe is used as a transmitting probe, and the other transmitting probe is used as a receiving probe to form a scanning system. When working, the two probes need to move at the same speed relative to or opposite each other. In this way, a comprehensive detection of the entire height range of the current scanning position can be realized. However, for the current scanning method using a flaw detection vehicle, this method can only detect one height, or it needs to stop frequently to adjust the positions of the two probes. Moreover, whether there is a vertical damage at the position between the two scans cannot be detected, so the prior art lacks a contact probe for comprehensive and rapid flaw detection scans at different heights within the flaw detection interval of a certain height of the track system

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