A nondestructive testing device for graphite electrodes

Abstract

The utility model relates to graphite electrode production detection equipment technical field discloses a kind of graphite electrode nondestructive testing device, comprising: workbench;Detection disc and intermittent rotation drive mechanism;After detection disc rotation is set on the table top of workbench, by intermittent rotation drive mechanism being set on workbench driving intermittent low-speed rotation, locating pit groove is formed on the top surface of detection disc, graphite motor positioning is placed in locating pit groove, locating pit groove is evenly provided with multiple and forms a row along the radial direction of detection disc, and again evenly provided with multiple rows along the circumferential direction of detection disc;Ultrasonic probe, translation motion drive mechanism and mounting bracket;After ultrasonic probe is erected on the table top by mounting bracket, again by translation motion drive mechanism drive periodic reciprocating translation motion on mounting bracket along the radial direction of detection disc.Compared with prior art, the advantage lies in: provide a kind of device that can carry out automatic, nondestructive, comprehensive detection to graphite electrode, to improve detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of graphite electrode production and testing equipment, specifically to a non-destructive testing device for graphite electrodes. Background Technology

[0002] Graphite electrodes, a crucial pillar product of the carbon industry, are primarily made from petroleum coke and needle coke as raw materials, with coal tar pitch as a binder. The process involves calcination, batching, mixing, molding, roasting, graphitization, and machining. They are essential conductive materials for electric arc furnace steelmaking and other electrometallurgical industries. During graphite electrode production, in addition to sampling for physicochemical analysis, their internal structure must be inspected to prevent defective semi-finished graphite electrodes from entering subsequent processes, increasing production costs and generating waste. Currently, the molding, roasting, and graphitization processes primarily employ hammering and mechanical cutting / slicing methods to detect internal defects. The hammering method involves inspectors striking the graphite electrode with a hammer and judging the presence of internal structural defects based on the sound. This method is highly dependent on the inspector's experience, ability, work attitude, and operational stability, and currently lacks formal industry and enterprise standards, relying solely on individual inspector judgment, leading to a high probability of misjudgment. Mechanical cutting and slicing is a destructive testing method that requires cutting or slicing the sample for inspection. It is time-consuming, costly, and cannot guarantee the quality of products not sampled. It also cannot meet the needs of internal quality inspection of large-size graphite electrodes.

[0003] Therefore, there is an urgent need for a high-efficiency, accurate, and non-destructive testing device. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide a device that can perform automated, non-destructive, and comprehensive testing of graphite electrodes, so as to improve testing efficiency and accuracy.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] A non-destructive testing device for graphite electrodes, comprising:

[0007] Workbench;

[0008] The detection disc and the intermittent rotation drive mechanism are used. After the detection disc is rotatably set on the workbench, it is driven to rotate intermittently at low speed by the intermittent rotation drive mechanism set on the workbench. A positioning pit is formed on the top surface of the detection disc. A graphite motor is positioned and placed in the positioning pit. Multiple positioning pits are evenly arranged along the radial direction of the detection disc to form a row, and then multiple rows are evenly arranged along the circumference of the detection disc.

[0009] An ultrasonic probe, a translational motion drive mechanism, and a mounting frame are provided. The ultrasonic probe is mounted on a table via the mounting frame and then driven by the translational motion drive mechanism to perform a periodic reciprocating translational motion along the radial direction of the detection disk on the mounting frame. Every half cycle of the motion performs ultrasonic imaging scanning on a row of graphite electrodes.

[0010] As an improvement, a rotating shaft is fixed at the center of the detection disk and rotatably connected to the platform.

[0011] The intermittent rotation drive mechanism includes:

[0012] The drive motor is rotated and fixed on the platform.

[0013] The drive disc has a fan-shaped annular plate formed on the side of the drive disc, and a lever formed on the back side; the drive disc is connected to the rotary drive motor for drive.

[0014] The driven disc has an intermittent transmission slot formed on one end face of the disc. The side wall of the intermittent transmission slot has pre-drilled arc notches and actuation notches, with multiple of each type arranged alternately and at intervals. The driving disc is movably positioned within the intermittent transmission slot. The arc notches engage with the outer arc surface of the annular plate, and the actuation notches engage with the lever. The driving disc alternates between the arc notches and the actuation notches. The driven disc is sleeved and fixed to the rotating shaft. It is used to drive the detection disc to rotate periodically and intermittently.

[0015] As an improvement, the mounting bracket is a U-shaped plate structure with the opening facing the detection disc and the bottom fixed to the side of the table. A limiting groove is formed on the bottom surface of the upper side plate. After the ultrasonic probe is installed and fixed on the slider, the slider is slidably connected in the limiting groove.

[0016] As an improvement, the translational motion drive mechanism includes a translational drive motor and a lead screw; the lead screw is rotatably connected between the two end walls of the limiting slide groove, and one end extends to the outside of the limiting slide groove and is driven by the translational drive motor mounted and fixed on the mounting bracket. This is used to drive the stable translational motion of the ultrasonic probe.

[0017] It is worth mentioning that the ultrasonic probe, rotation drive motor, and translation drive motor in this technical solution are all existing devices of common knowledge, and their use and control methods are also existing technologies. The ultrasonic probe requires existing transmitting and receiving circuits, signal processing units, display systems, and storage systems to be used.

[0018] The advantages of this utility model compared with the prior art are as follows:

[0019] 1. This novel method combines the intermittent rotation of the detection disk with the reciprocating scanning of the ultrasonic probe, enabling row-by-row and point-by-point detection of multiple rows of graphite electrodes without manual intervention. This avoids the subjective errors of the hammering method and the destructive nature of the mechanical slicing method, significantly improving the accuracy and reliability of the detection.

[0020] 2. The new intermittent rotation mechanism is reasonably designed and moves smoothly. Combined with high-speed scanning by an ultrasonic probe, it can achieve rapid detection of batch graphite electrodes without stopping the machine, which greatly improves the detection efficiency and meets the quality monitoring needs of large-scale industrial production lines.

[0021] 3. This new type of device adopts a U-shaped mounting frame, screw drive, and a special slotted intermittent mechanism. The overall structure is reasonably laid out, with high motion accuracy and strong anti-interference ability, ensuring the stability of long-term operation and the repeatability of test results.

[0022] 4. The new type of detection disc is equipped with multiple rows of radially distributed positioning pits to ensure that the position of each graphite electrode is fixed; the ultrasonic probe covers a whole row of workpieces every half scanning cycle, which is coordinated and synchronized with the disc rotation action, effectively avoiding workpiece omission or repeated detection. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a structural schematic diagram from another perspective of this utility model.

[0025] Figure 3 This is a partial structural schematic diagram of the present invention. Figure 1 .

[0026] Figure 4 This is a partial structural schematic diagram of the present invention. Figure 2 .

[0027] Figure 5 This is a schematic diagram of the driven disk part of this utility model.

[0028] As shown in the figure: 1. Detection disc; 2. Table; 3. Positioning groove; 4. Ultrasonic probe; 5. Mounting bracket; 6. Rotating shaft; 7. Rotation drive motor; 8. Drive disc; 9. Drive disc; 10. Fan-shaped annular plate; 11. Lever; 12. Driven disc; 13. Lead screw; 14. Intermittent transmission slot; 15. Arc notch; 16. Actuation notch; 17. Limiting groove; 18. Slider; 19. Translation drive motor. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] A non-destructive testing device for graphite electrodes, comprising:

[0032] Workbench;

[0033] The system includes a detection disc 1 and an intermittent rotation drive mechanism. A positioning groove 3 is formed on the top surface of the detection disc 1. A graphite motor is positioned and placed within the positioning groove 3. Multiple positioning grooves 3 are evenly arranged in a row along the radial direction of the detection disc 1, and then further evenly arranged in multiple rows along the circumference of the detection disc 1 (or multiple evenly arranged positioning grooves 3 of different shapes can be designed). A rotating shaft 6 is fixed at the center of the detection disc 1 and rotatably connected to the platform 2. The intermittent rotation drive mechanism includes: a rotation drive motor 7, mounted and fixed on a platform 2; a drive disk 8, which has a fan-shaped annular plate 10 formed on the side of the drive disk 9, and a lever 11 formed on the back side; the drive disk 8 is driven and connected to the rotation drive motor 7; a driven disk 12, which has an intermittent transmission slot 14 formed on one end face of the disk, and the side wall of the intermittent transmission slot 14 is reserved with an arc notch 15 and a toggle notch 16, which are provided in multiples, alternating and spaced apart; after the drive disk 8 is movably set in the intermittent transmission slot 14, the arc notch 15 is movably engaged with the outer arc surface of the fan-shaped annular plate 10, and the toggle notch 16 is movably engaged with the lever 11, and the drive disk 8 is alternately engaged with the arc notch 15 or the toggle notch 16; the driven disk 12 is sleeved and fixed on the rotating shaft 6;

[0034] The system comprises an ultrasonic probe 4, a translational motion drive mechanism, and a mounting frame 5. The mounting frame 5 is a U-shaped plate structure with its opening facing the detection disc 1. Its bottom end is fixed to the side of the platform 2. A limiting groove 17 is formed on the bottom surface of the upper side plate. After the ultrasonic probe 4 is installed and fixed to the slider 18, the slider 18 is slidably connected within the limiting groove 17. The translational motion drive mechanism includes a translational drive motor 19 and a lead screw 13. The lead screw 13 is rotatably connected between the two end walls of the limiting groove 17, and one end extends to the outside of the limiting groove 17, where it is driven by the translational drive motor 19, which is mounted and fixed on the mounting frame 5.

[0035] In the specific implementation of this embodiment:

[0036] The detection disk 1 is rotatably mounted on the table surface 2 of the worktable via a rotating shaft 6. Multiple graphite electrodes are placed in positioning grooves 3 on the top surface of the detection disk 1. The positioning grooves 3 are evenly arranged in multiple rows along the radial direction of the detection disk and distributed along its circumference.

[0037] After the device is started, the intermittent rotation drive mechanism begins to work. The rotation drive motor 7 drives the drive disk 8 to rotate continuously. The fan-shaped annular plate 10 and the lever 11 on the drive disk 8 rotate accordingly. When the drive disk 8 enters the intermittent transmission slot 14 of the driven disk 12, the outer arc-shaped surface of the fan-shaped annular plate 10 contacts and engages with the arc-shaped notch 15, at which point the driven disk 12 does not rotate. As the drive disk 8 continues to rotate, the lever 11 contacts and engages with the actuation notch 16, thereby actuating the driven disk 12 to rotate by an angle. Since the arc-shaped notch 15 and the actuation notch 16 are alternately and intermittently arranged, the driven disk 12 will be driven to rotate intermittently once for every revolution of the drive disk 8. The driven disk 12 transmits this intermittent motion to the detection disk 1 through the rotating shaft 6, causing it to periodically stop and rotate.

[0038] During the intermittent pauses of the detection disk 1, the translational motion drive mechanism begins to operate. The translational drive motor 19 drives the lead screw 13 to rotate, causing the slider 18, which meshes with the lead screw 13, to slide radially along the detection disk 1 within the limiting groove 17 of the mounting bracket 5. The ultrasonic probe 4, fixed on the slider 18, then performs reciprocating linear motion. Every time the ultrasonic probe 4 completes half a cycle (i.e., moves from one end of the limiting groove 17 to the other), it performs a comprehensive ultrasonic imaging scan on the row of graphite electrodes located directly below it, which is currently in a paused state, to acquire image data of their internal structure.

[0039] The detection disk 1 rotates again, delivering the next row of graphite electrodes directly below the ultrasonic probe 4 and pausing. The ultrasonic probe 4 then moves in the opposite direction and performs the next scan. This cycle repeats until all rows of graphite electrodes have been non-destructively tested.

[0040] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A non-destructive testing device for graphite electrodes, characterized in that, include: Workbench; The detection disc (1) and the intermittent rotation drive mechanism; the detection disc (1) is rotatably set on the table surface (2) of the workbench, and is driven to rotate intermittently at low speed by the intermittent rotation drive mechanism set on the workbench. A positioning pit (3) is formed on the top surface of the detection disc (1), and a graphite motor is positioned and placed in the positioning pit (3). Multiple positioning pits (3) are evenly arranged along the radial direction of the detection disc (1) to form a row, and then multiple rows are evenly arranged along the circumference of the detection disc (1). Ultrasonic probe (4), translational motion drive mechanism and mounting frame (5); the ultrasonic probe (4) is mounted on the table (2) by the mounting frame (5), and is driven by the translational motion drive mechanism to perform a periodic reciprocating translational motion along the radial direction of the detection disk (1) on the mounting frame (5). Every half cycle of the motion, an ultrasonic imaging scan is performed on a row of graphite electrodes.

2. The non-destructive testing device for graphite electrodes according to claim 1, characterized in that: The detection disk (1) has a rotating shaft (6) that passes through and is rotatably connected to the table surface (2) at its center.

3. The non-destructive testing device for graphite electrodes according to claim 2, characterized in that, The intermittent rotation drive mechanism includes: Rotate the drive motor (7) and fix it on the table (2); The drive disk (8) has a fan-shaped annular plate (10) formed on the side of the drive disk (9) and a lever (11) formed on the back side; the drive disk (8) is connected to the rotary drive motor (7) for driving. The driven disk (12) has an intermittent transmission slot (14) formed on one end face of the disk. The side wall of the intermittent transmission slot (14) has a circular arc notch (15) and a turning notch (16). Multiple of the two are provided in a one-to-one correspondence, and they are arranged alternately and at intervals. After the drive disk (8) is movably set in the intermittent transmission slot (14), the circular arc notch (15) is movably engaged with the outer arc surface of the fan ring plate (10), and the turning notch (16) is movably engaged with the lever (11). The drive disk (8) is alternately engaged with the circular arc notch (15) or the turning notch (16). The driven disk (12) is sleeved and fixed on the rotating shaft (6).

4. The non-destructive testing device for graphite electrodes according to claim 1, characterized in that: The mounting bracket (5) is a U-shaped plate structure. After the opening faces the detection disc (1), the bottom end is fixed to the side of the table (2). A limiting groove (17) is formed on the bottom surface of the upper side plate. After the ultrasonic probe (4) is installed and fixed on the slider (18), the slider (18) is slidably connected in the limiting groove (17).

5. The non-destructive testing device for graphite electrodes according to claim 4, characterized in that: The translational motion drive mechanism includes a translational drive motor (19) and a lead screw (13); the lead screw (13) is rotatably connected between the two end walls of the limiting slide groove (17), and one end extends to the outside of the limiting slide groove (17) and is driven by the translational drive motor (19) installed and fixed on the mounting frame (5).

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