Current testing tool
By designing a cylinder-driven current testing fixture that supports both AC and DC modes and forms a closed circuit, the convenience and stability issues of circumferential sensitivity testing of ring-shaped test blocks are solved, achieving efficient and stable testing results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-14
AI Technical Summary
Existing equipment is difficult to directly apply to circumferential sensitivity testing of ring-shaped test blocks, resulting in inconvenience in the testing process. Furthermore, the equipment has poor compatibility and is difficult to adapt to different magnetization methods.
A current testing fixture was designed, which uses a cylinder to drive automatic extension and retraction, supports AC and DC modes, and forms a closed circuit by connecting copper busbars to electrodes to ensure the stability and consistency of current transmission.
It simplifies the operation process, improves testing efficiency, solves the problem of poor equipment compatibility, avoids testing errors, and ensures the stability and consistency of current transmission.
Smart Images
Figure CN224122637U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of testing fixture technology, and in particular relates to a current testing fixture. Background Technology
[0002] Magnetic particle testing is a non-destructive testing method that utilizes magnetic phenomena to detect surface and near-surface defects in ferromagnetic material workpieces. The basic principle of magnetic particle testing is that when a workpiece is magnetized, a leakage magnetic field (also called a leakage magnetic field) is formed at the surface and near-surface defects such as cracks. The leakage magnetic field will attract the magnetic powder applied during the testing process, forming a magnetic trace, which can be several times or tens of times larger than the actual defect and can be displayed under ultraviolet light.
[0003] In magnetic particle inspection, the circumferential sensitivity test of a ring-shaped test block is a crucial step in ensuring the accuracy and reliability of the test results. However, due to the varying circumferential magnetization methods of different workpieces and the differences in the design of clamping devices, some existing equipment is difficult to directly apply to the sensitivity testing of ring-shaped test blocks. Currently, there is a lack of a mechanism in the prior art that can indirectly test the circumferential current to complete the circumferential sensitivity test, which brings many inconveniences to actual inspection work. Therefore, to address the above problems, the current testing fixture provided by this utility model is of great significance. Utility Model Content
[0004] This invention provides a current testing fixture. The fixture is automatically extended and retracted via a cylinder drive. The operator simply places the annular test block onto the test bar or shunt, and the test is completed by spraying magnetic suspension fluid after the cylinder extends. This significantly simplifies the operation process and improves testing efficiency. The fixture supports both AC (test bar) and DC (shunt) modes, adapting to different magnetization methods and solving the problem of poor equipment compatibility in existing technologies. The use of copper busbars connected to electrodes to form a closed circuit ensures the stability and consistency of current transmission during testing, effectively avoiding test errors caused by poor contact or current fluctuations. In summary, this invention solves the problems in the prior art.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] This utility model discloses a current testing fixture, comprising a lower insulating plate, with a first connecting plate and a second connecting plate fixedly connected to the top two ends of the lower insulating plate, a first copper busbar installed on one side of the first connecting plate, a cylinder installed on one side of the second connecting plate, a second copper busbar installed at the end of the output shaft of the cylinder, a test rod disposed between the second copper busbar and the first copper busbar, a first conductive busbar and a second conductive busbar installed on the top of the first connecting plate and the second connecting plate, and an upper insulating plate installed on the top of the first conductive busbar and the second conductive busbar.
[0007] Furthermore, the first and second conductive busbars are respectively connected to the circumferentially magnetized upper and lower electrodes, forming a closed circuit.
[0008] Furthermore, both the first connecting plate and the second connecting plate are L-shaped, and the first conductive busbar and the second conductive busbar are connected to the first connecting plate and the second connecting plate respectively by bolts.
[0009] Furthermore, both the first and second copper busbars are L-shaped, with their bottom surfaces in contact with the top surface of the lower insulating plate, and the top surfaces of the first and second copper busbars are respectively attached to the bottom surfaces of the first and second conductive busbars.
[0010] Furthermore, the upper insulating plate is connected to the first conductive bus and the second conductive bus by bolts, and the bottom surface of the upper insulating plate is attached to the top surface of the first conductive bus and the second conductive bus.
[0011] The present invention has the following advantages over the prior art:
[0012] (1) High efficiency and convenience: The test fixture of this utility model is automatically extended and retracted by a cylinder. The operator only needs to put the ring test block on the test bar or the distributor, and the magnetic suspension liquid is poured after the cylinder extends to complete the test. This greatly simplifies the operation process and improves the detection efficiency.
[0013] (2) High versatility: The tooling supports both AC (test bar) and DC (shunt) modes, which can adapt to the needs of different magnetization methods and solve the problem of poor equipment compatibility in the existing technology;
[0014] (3) High stability: The copper busbar is connected to the electrode to form a closed circuit, which ensures the stability and consistency of current transmission during the test and effectively avoids test errors caused by poor contact or current fluctuations.
[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of a current testing fixture according to the present invention;
[0018] Figure 2 This is a front view of a current testing fixture according to the present invention.
[0019] The attached diagram lists the components represented by each number as follows:
[0020] 1. Lower insulating plate; 2. First connecting plate; 3. Second connecting plate; 4. First copper busbar; 5. Cylinder; 6. Second copper busbar; 7. Test rod; 8. First conductive busbar; 9. Second conductive busbar; 10. Upper insulating plate. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0022] In the description of this utility model, it should be understood that the terms "relative", "one end", "inner", "lateral", "end", "both ends", "both sides", "front", "one end face", "the other end face", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0023] Example 1:
[0024] Please see Figure 1-2 As shown, a current testing fixture of this utility model includes a lower insulating plate 1. A first connecting plate 2 and a second connecting plate 3 are fixedly connected to the top two ends of the lower insulating plate 1, respectively. A first copper busbar 4 is installed on one side of the first connecting plate 2, and a cylinder 5 is installed on one side of the second connecting plate 3. A second copper busbar 6 is installed at the end of the output shaft of the cylinder 5. The second copper busbar 6 can be moved by driving the cylinder 5 to achieve the switching between standby and working states of the fixture. When the cylinder 5 retracts, the fixture is in standby state. When the cylinder 5 extends, the fixture enters working state. A test rod 7 is provided between the second copper busbar 6 and the first copper busbar 4. The annular test block to be tested can be placed on the test rod 7. At this time, the fixture is in AC mode. A first conductive busbar 8 and a second conductive busbar 9 are installed on the top of the first connecting plate 2 and the second connecting plate 3, respectively. An upper insulating plate 10 is installed on the top of the first conductive busbar 8 and the second conductive busbar 9. The upper insulating plate 10 and the lower insulating plate 1 can be made of insulating materials such as epoxy board.
[0025] The first conductive bar 8 and the second conductive bar 9 are respectively connected to the circumferentially magnetized upper and lower electrodes, forming a closed circuit to ensure that the current can pass through the test bar 7 evenly (suitable for AC).
[0026] The first connecting plate 2 and the second connecting plate 3 are both L-shaped. The first conductive busbar 8 and the second conductive busbar 9 are connected to the first connecting plate 2 and the second connecting plate 3 respectively by bolts. The first conductive busbar 8 and the second conductive busbar 9 can be removed from the top of the first connecting plate 2 and the second connecting plate 3 by unscrewing the bolts, so as to perform regular maintenance and replacement of the first conductive busbar 8 and the second conductive busbar 9.
[0027] The first copper busbar 4 and the second copper busbar 6 are both L-shaped, and their bottom surfaces are in contact with the top surface of the lower insulating plate 1. The top surfaces of the first copper busbar 4 and the second copper busbar 6 are respectively attached to the bottom surfaces of the first conductive busbar 8 and the second conductive busbar 9. When the first conductive busbar 8 and the second conductive busbar 9 are connected to the electrodes and form a closed circuit, the stability and consistency of current transmission during the test can be ensured, thereby effectively avoiding test errors caused by poor contact or current fluctuations.
[0028] The upper insulating plate 10 is connected to the first conductive bar 8 and the second conductive bar 9 by bolts, and the bottom surface of the upper insulating plate 10 is attached to the top surface of the first conductive bar 8 and the second conductive bar 9. The upper insulating plate 10 can be removed from the top of the first conductive bar 8 and the second conductive bar 9 by unscrewing the bolts, so as to perform regular maintenance and replacement of the upper insulating plate 10.
[0029] Example 2:
[0030] Please see Figure 1-2 As shown, in this utility model, a current testing fixture can be provided. For example, the test bar 7 in embodiment 1 can be replaced with a shunt. In this case, the annular test block to be tested is placed on the shunt. At this time, the fixture is in DC mode. By selecting the test bar 7 or the shunt, the fixture can support both AC (test bar 7) and DC (shunt) modes, so as to adapt to the needs of different magnetization methods, thereby solving the problem of poor equipment compatibility in the prior art.
[0031] The circuits, electronic components, and chip modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.
[0032] All standard parts used in the application documents can be purchased from the market. All components in this application document can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The electrical components mentioned in this document are all electrically connected to the external main controller and power supply, and the main controller is a conventional known device that can play a control role.
[0033] The working principle of this utility model is as follows:
[0034] In use, before testing, cylinder 5 is in its initial position, with a gap between the first copper busbar 4 and the second copper busbar 6 to allow the test bar 7 or shunt to be inserted. Then, the annular test block is placed on the test bar 7 or shunt, and cylinder 5 is driven to extend the second copper busbar 6 to press the test bar 7 or shunt tightly. Afterward, the operator pours magnetic suspension liquid to perform magnetization current testing. By observing the magnetic marks on the annular test block, the circumferential magnetization sensitivity of the equipment can be directly reflected. This fixture can be directly installed on the equipment without hindering the flaw detection work of the tested equipment.
[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A current test tool, characterized by, The device includes a lower insulating plate (1), with a first connecting plate (2) and a second connecting plate (3) fixedly connected to the top two ends of the lower insulating plate (1), a first copper busbar (4) installed on one side of the first connecting plate (2), a cylinder (5) installed on one side of the second connecting plate (3), a second copper busbar (6) installed at the end of the output shaft of the cylinder (5), a test rod (7) provided between the second copper busbar (6) and the first copper busbar (4), a first conductive busbar (8) and a second conductive busbar (9) installed on the top of the first connecting plate (2) and the second connecting plate (3), and an upper insulating plate (10) installed on the top of the first conductive busbar (8) and the second conductive busbar (9).
2. The current test tool of claim 1, wherein, The first conductive bus (8) and the second conductive bus (9) are respectively connected to the circumferentially magnetized upper and lower electrodes and form a closed circuit.
3. The current test tool of claim 1, wherein, Both the first connecting plate (2) and the second connecting plate (3) are L-shaped. The first conductive busbar (8) and the second conductive busbar (9) are connected to the first connecting plate (2) and the second connecting plate (3) respectively by bolts.
4. The current test tool of claim 1, wherein, Both the first copper busbar (4) and the second copper busbar (6) are L-shaped, and their bottom surfaces are in contact with the top surface of the lower insulating plate (1). The top surfaces of the first copper busbar (4) and the second copper busbar (6) are respectively attached to the bottom surfaces of the first conductive busbar (8) and the second conductive busbar (9).
5. The current test tool of claim 1, wherein, The upper insulating plate (10) is connected to the first conductive bar (8) and the second conductive bar (9) by bolts, and the bottom surface of the upper insulating plate (10) is attached to the top surface of the first conductive bar (8) and the second conductive bar (9).