Tool for carrying out ultrasonic detection on slewing bearing of in-service gantry crane
By designing ultrasonic testing tooling for portal cranes, the problem of crack detection in the internal rotary support is solved by using qualified test blocks and simulated defect test blocks, the accuracy and efficiency of the inspection are improved, and the risk of equipment collapse is reduced.
Patent Information
- Application Number
- CN202323372046.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-12
AI Technical Summary
The rotary support of the gantry crane is prone to fatigue cracks during use, resulting in the risk of equipment collapse. It is difficult for the prior art to effectively detect internal crack defects without disassembly, especially at intersection corners of planes with different depths.
An ultrasonic testing tool set consisting of qualified test blocks and artificial defect test blocks is designed. The qualified test block is used to adjust the flaw detection sensitivity. The artificial defect test block is made of the same material. Through wire cutting processing, artificial defects with a depth of 5mm are produced. , simulates the ultrasonic echo state of the defects found.
The detection rate and accuracy of the rotary support crack defects are improved, and the internal crack defects of the gantry crane can be effectively detected without disassembling the equipment.
Smart Images
Figure CN222337111U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tool for ultrasonically detecting the slewing bearing of a portal crane in service. Background Art
[0002] When the gantry crane is in operation, the position on the opposite side of the slewing bearing hook is subject to periodic tensile stress, which is prone to fatigue cracks. If the cracks extend to a certain extent, there is a risk that the gantry crane will collapse due to the failure of the slewing bearing. Because the gantry crane is in normal use, and because of the equipment structure and the shape of the slewing bearing, there are great restrictions on the selection of detection schemes. At the same time, crack defects are prone to occur at the intersection of two planes of different depths, which affects the determination of the flaw detection results. There is no experience in China in performing flaw detection on the slewing bearing of the gantry crane without disassembly. In order to find a suitable method, we conducted some exploration and made this tool to assist in ultrasonic testing of the slewing bearing of the gantry crane in service. Utility Model Content
[0003] The utility model aims to provide a tool for ultrasonic testing of the slewing bearing of a portal crane in service, so as to solve the problems in the above-mentioned background technology.
[0004] The technical solution adopted to achieve the above-mentioned purpose is a tool for ultrasonic testing of the slewing bearings of in-service gantry cranes, including a qualified test block for adjusting the sensitivity of the flaw detection and an artificial simulated defect test block for simulating the discovery of defects, wherein the artificial simulated defect test block includes a test block body, a supporting block is provided on one side of the test block body, the supporting block and the test block body are connected to form an integral stepped structure, and an artificial simulated defect is provided at the connection between the supporting block and the test block body.
[0005] Furthermore, the artificially simulated defect test block is made of the same material as the slewing bearing of the in-service portal crane that needs to be ultrasonically tested.
[0006] Furthermore, the artificial simulated defect is an artificial defect with a depth of 5 mm made by wire cutting. Beneficial Effects
[0007] Compared with the prior art, the utility model has the following advantages.
[0008] The utility model can use a qualified test block to adjust the flaw detection sensitivity before ultrasonic testing of the slewing bearing of the in-service portal crane, and use an artificial simulated defect test block to simulate the echo state of the ultrasonic instrument for discovering defects, which can effectively improve the detection rate of crack defects in the slewing bearing and the accuracy of judgment. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0010] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0011] The utility model is further described in detail below in conjunction with the embodiments and drawings.
[0012] like Figure 1 As shown, a tool for ultrasonic testing of the slewing bearing of an in-service portal crane comprises a qualified test block 1 for adjusting the sensitivity of the flaw detection and an artificial simulated defect test block 2 for simulating the discovery of defects, wherein the artificial simulated defect test block 2 comprises a test block body 21, a support block 22 is provided on one side of the test block body 21, the support block 22 is connected to the test block body 21 to form an integral stepped structure, and an artificial simulated defect 23 is provided at the connection between the support block 22 and the test block body 21.
[0013] The artificially simulated defect test block 2 is made of the same material as the slewing bearing of the in-service portal crane that needs to be ultrasonically tested.
[0014] The artificial simulated defect 23 is an artificial defect with a depth of 5 mm made by wire cutting.
[0015] The utility model comprises a qualified test block 1 without defects and a test block 2 with artificial simulated defects having a depth of 5 mm. Before ultrasonic testing is performed on the slewing bearing of a portal crane in service, the qualified test block 1 is used to adjust the flaw detection sensitivity, and the artificial simulated defect test block 2 is used to simulate the echo state of an ultrasonic instrument for discovering defects, so as to more accurately discover the crack defects inside the slewing bearing.
[0016] During the specific implementation of the utility model, the detection sensitivity of the ultrasonic flaw detector can be adjusted by comparing with a defect-free qualified test block 1, and the standard for judging the presence of a crack defect can be determined by using the law of echo height change; if a crack defect exists in the slewing bearing, an artificial simulated defect test block 2 with an artificial simulated defect 23 with a depth of 5 mm can be used for comparison to effectively determine the extension depth of the crack defect.
Claims
1. A tool for ultrasonic testing of a slewing bearing of an in-service portal crane, comprising a qualified test block (1) for adjusting the sensitivity of the flaw detection and an artificial simulated defect test block (2) for simulating the discovery of defects, characterized in that: The artificial simulated defect test block (2) comprises a test block body (21), a support block (22) is provided on one side of the test block body (21), the support block (22) and the test block body (21) are connected to form an integral stepped structure, and an artificial simulated defect (23) is provided at the connection between the support block (22) and the test block body (21).
2. The tooling for ultrasonic testing of the slewing bearing of an in-service portal crane according to claim 1 is characterized in that: The artificial simulated defect test block (2) is made of the same material as the slewing bearing of the in-service portal crane that needs to be subjected to ultrasonic testing.
3. The tooling for ultrasonic testing of the slewing bearing of an in-service portal crane according to claim 1 is characterized in that: The artificial simulated defect (23) is an artificial defect with a depth of 5 mm made by wire cutting.