A high-temperature ceramic roller hardness detection device

Abstract

The utility model relates to material performance test technical field especially relates to a kind of ceramic roller bar hardness detection device under high temperature.The utility model provides such a kind of ceramic roller bar hardness detection device under high temperature, including detection bin, controller, protective door, locking screw rod, handle and guide frame etc., controller is installed in detection bin front right side, detection bin left side is rotatably equipped with protective door, locking screw rod is threadedly connected between protective door and detection bin, handle is fixedly connected on the outer side of protective door, guide frame is fixedly connected in the middle of detection bin, guide frame is annular, and test opening is arranged in the upper side position of the middle of guide frame.The utility model is heated by the cooperation structure of heating coil and guide frame, and ceramic roller bar is heated in closed environment, so that it receives hardness test under high temperature, truly reflects its actual mechanical property in kiln working environment, and overcomes the distortion problem of traditional normal temperature detection.

Description

Technical Field

[0001] This utility model relates to the field of material performance testing technology, and in particular to a device for testing the hardness of ceramic rollers at high temperatures. Background Technology

[0002] Ceramic rollers, as key components for bearing and transporting products, are widely used in high-temperature sintering kilns in industries such as building ceramics, daily-use ceramics, and photovoltaic glass. They operate in extreme high-temperature environments of 900℃ to 1400℃ for extended periods, and their material properties directly affect the rollers' wear resistance, bending strength, and service life.

[0003] Currently, the hardness of ceramic rollers is generally tested offline at room temperature. This means that after the kiln is shut down, the rollers are disassembled and cooled to room temperature before being measured with a hardness tester. However, the rollers undergo thermal stress release and microstructure evolution during the cooling process, which causes changes in their physical properties. The measured hardness value is difficult to accurately reflect their actual mechanical properties under high-temperature working conditions. Furthermore, the early performance degradation of some materials is not obvious at room temperature, but under high-temperature conditions, the load-bearing capacity is significantly weakened, which poses a risk of detection lag, inaccurate assessment, or even misjudgment.

[0004] Therefore, it is necessary to design a device for testing the hardness of ceramic rollers at high temperatures. Utility Model Content

[0005] In order to overcome the shortcomings of existing testing methods that generally adopt offline room temperature testing and cannot reflect the true high-temperature performance, this utility model provides a ceramic roller hardness testing device at high temperature.

[0006] The technical solution is as follows: A ceramic roller hardness testing device at high temperature includes a testing chamber, a controller, a protective door, a locking screw, a handle, a guide frame, a heating coil, an electric push rod, a hardness tester, a vision camera, an infrared thermometer, and a stress loading mechanism. The controller is installed on the right side of the front of the testing chamber. A protective door is rotatably installed on the left side of the testing chamber. A locking screw is threadedly connected between the protective door and the testing chamber. A handle is fixed to the outer side of the protective door. A guide frame is fixed to the middle of the testing chamber. The guide frame is ring-shaped, with a test opening on the upper side of the middle of the guide frame. A heating coil is arranged around the inner side of the ring-shaped guide frame. An electric push rod is installed in the upper part of the testing chamber. The telescopic end of the electric push rod faces the test opening, and a hardness tester is connected to the telescopic end of the electric push rod. An infrared thermometer and a vision camera are installed on the left and right sides of the upper part of the hardness tester, respectively. A stress loading mechanism is located on the right side of the testing chamber. The controller is electrically connected to the heating coil, the electric push rod, the hardness tester, the vision camera, and the infrared thermometer.

[0007] As a further preferred embodiment, the stress loading mechanism includes a hydraulic push rod, a connecting frame, clamping components, a bidirectional screw, and a motor. The hydraulic push rod is installed on the right side inside the testing chamber, and the connecting frame is connected to the telescopic end of the hydraulic push rod. Clamping components are slidably provided on both the front and rear sides of the connecting frame, and the two clamping components are arranged symmetrically. The bidirectional screw is rotatably connected to the right side of the connecting frame, and the two clamping components are threaded to the left-hand and right-hand sections of the bidirectional screw, respectively. A motor is installed on one side of the connecting frame, and both the motor and the hydraulic push rod are electrically connected to the controller. The output shaft of the motor is connected to the bidirectional screw.

[0008] As a further preferred option, a warning light is also included. A warning light is installed on the right side of the front of the detection chamber, and the warning light is electrically connected to the controller.

[0009] As a further preferred option, it also includes a pressure gauge and a pressure relief valve. A pressure gauge is located on the left side of the front of the detection chamber. The pressure gauge is connected to the inside of the detection chamber. A pressure relief valve is installed on the pressure gauge. Both the pressure gauge and the pressure relief valve are electrically connected to the controller.

[0010] As a further preferred option, it also includes observation windows, with observation windows installed on both the front and rear sides of the left side of the testing chamber.

[0011] As a further preferred option, the clamping components are all made of silicon nitride ceramic, and the vision camera is fitted with a high-temperature resistant protective window.

[0012] Beneficial effects:

[0013] 1. This utility model uses a combination structure of heating coil and guide frame to heat ceramic rollers in a closed environment, so that they are subjected to hardness testing at high temperature, which truly reflects their actual mechanical properties in the working environment of the kiln and overcomes the distortion problem of traditional room temperature testing.

[0014] 2. This utility model is equipped with a stress loading mechanism consisting of a hydraulic push rod, a connecting frame, a clamping component, a bidirectional screw, and a motor. This mechanism can further apply axial load to the roller at high temperatures, simulating the stress state under actual service conditions, and making hardness testing more practically meaningful in engineering. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the protective door, locking screw, and handle components of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the components of this utility model, including the electric actuator, hardness tester, and vision camera.

[0018] Figure 4This is a three-dimensional structural diagram of the connecting frame, clamping parts, and bidirectional screw of this utility model.

[0019] The components are as follows: 1-Detection chamber, 2-Controller, 3-Protective door, 4-Locking screw, 5-Handle, 6-Guide frame, 7-Heating coil, 8-Electric push rod, 9-Hardness tester, 10-Vision camera, 11-Infrared thermometer, 12-Hydraulic push rod, 13-Connecting frame, 14-Clamping component, 15-Bidirectional screw, 16-Motor, 17-Warning light, 18-Pressure gauge, 19-Pressure relief valve, 101-Observation window. Detailed Implementation

[0020] Example: A device for testing the hardness of ceramic rollers at high temperatures, such as... Figures 1-4 As shown, the device includes a testing chamber 1, a controller 2, a protective door 3, a locking screw 4, a handle 5, a guide frame 6, a heating coil 7, an electric push rod 8, a hardness tester 9, a vision camera 10, an infrared thermometer 11, and a stress loading mechanism. The controller 2 is installed on the front right side of the testing chamber 1. The protective door 3 is rotatably mounted on the left side of the testing chamber 1. The protective door 3 is threadedly connected to the testing chamber 1 by a locking screw 4. A handle 5 is welded to the outer side of the protective door 3. A guide frame 6 is fixedly connected to the center of the testing chamber 1. The guide frame 6 is ring-shaped, and a handle 5 is located on the upper side of the center of the guide frame 6. A test opening is provided, and a heating coil 7 is arranged around the inner side of the annular guide frame 6. An electric push rod 8 is installed in the upper part of the test chamber 1 by bolts. The telescopic end of the electric push rod 8 is directly above the test opening, and a hardness tester 9 is connected to the telescopic end of the electric push rod 8. An infrared thermometer 11 and a vision camera 10 are respectively installed on the left and right sides of the upper part of the hardness tester 9. A stress loading mechanism is provided on the right side of the inside of the test chamber 1. The controller 2 is electrically connected to the heating coil 7, the electric push rod 8, the hardness tester 9, the vision camera 10, and the infrared thermometer 11.

[0021] like Figure 2 and Figure 4As shown, the stress loading mechanism includes a hydraulic push rod 12, a connecting frame 13, clamping parts 14, a bidirectional screw 15, and a motor 16. The hydraulic push rod 12 is installed on the right side inside the testing chamber 1. The connecting frame 13 is connected to the telescopic end of the hydraulic push rod 12. Clamping parts 14 are slidably mounted on both the front and rear sides of the connecting frame 13, and the two clamping parts 14 are symmetrically arranged. The clamping parts 14 are all made of silicon nitride ceramic material, which is heat-resistant, wear-resistant, and non-deformable, effectively protecting the surface of the roller, avoiding clamping damage, and extending the testing period. The lifespan of the parts is extended, and the vision camera 10 is equipped with a high-temperature resistant protective window, which can capture indentation images in real time. Combined with image processing technology, the hardness value is automatically calculated, improving the detection accuracy and efficiency. A bidirectional screw 15 is rotatably connected to the right side of the connecting frame 13. Two clamping parts 14 are threaded to the left-hand and right-hand sections of the bidirectional screw 15, respectively. A motor 16 is installed on one side of the connecting frame 13. The motor 16 and the hydraulic push rod 12 are electrically connected to the controller 2. The output shaft of the motor 16 is connected to the bidirectional screw 15.

[0022] like Figure 1 As shown, it also includes a warning light 17. The warning light 17 is installed on the front right side of the detection chamber 1. The warning light 17 is electrically connected to the controller 2. When the temperature, pressure or equipment operation is abnormal, it will automatically alarm to improve the system's safety protection level.

[0023] like Figure 1 As shown, it also includes a pressure gauge 18 and a pressure relief valve 19. The pressure gauge 18 is located on the front left side of the detection chamber 1. The pressure gauge 18 is connected to the inside of the detection chamber 1. The pressure gauge 18 is equipped with a pressure relief valve 19. Both the pressure gauge 18 and the pressure relief valve 19 are electrically connected to the controller 2 to monitor the air pressure inside the detection chamber 1 in real time. In case of abnormality, the pressure is automatically released to prevent the risk of overpressure and ensure the safety of equipment and personnel.

[0024] like Figure 1 and Figure 4 As shown, it also includes an observation window 101. Observation windows 101 are installed on both the front and rear sides of the left side of the detection chamber 1, which makes it convenient for operators to directly observe the internal detection process from the outside, thereby improving operational safety and visibility.

[0025] In actual operation, the operator places the ceramic roller to be tested horizontally into the opening on the left side of the test chamber 1, so that it spans the inside of the annular guide frame 6, with the middle area of ​​the roller facing the test opening on the upper part of the guide frame. Then, the protective door 3 is closed, and the roller is tightly locked to the test chamber 1 by the locking screw 4 to ensure the airtightness of the high-temperature environment during the test, prevent heat leakage, and ensure operational safety.

[0026] The testing chamber 1 is equipped with observation windows 101 on both the front and rear sides, allowing operators to monitor the internal testing status in real time from the outside. After the controller 2 is started, it first controls the heating coil 7 to be energized, uniformly heating the ceramic roller in the sealed cavity and gradually raising the temperature to the preset target temperature, simulating its real service environment in the kiln. The infrared thermometer 11 collects the surface temperature of the roller in real time and feeds the data back to the controller 2 to achieve high-precision closed-loop temperature control, ensuring temperature stability during the test. At the same time, the pressure gauge 18 continuously monitors the air pressure inside the testing chamber 1. When the pressure rises abnormally, the controller 2 automatically opens the pressure relief valve 19 to safely relieve pressure, effectively preventing the risk of overpressure and improving the safety of system operation.

[0027] Once the temperature reaches the set value and remains stable, the controller 2 activates the stress loading mechanism. The motor 16 drives the bidirectional screw 15 to rotate, causing the two clamping parts 14 to move inward synchronously along the guide rail, thus reliably clamping the ceramic roller. Subsequently, the hydraulic push rod 12 pushes the connecting frame 13 to move to the left, causing the ceramic roller to move to the left as a whole, so that its right end abuts against the inside of the protective door 3, applying the set axial pressure to simulate the actual load state it bears in the high-temperature kiln. The clamping parts 14 are made of silicon nitride ceramic material, which has excellent high temperature resistance, high hardness and low thermal expansion coefficient, and can maintain structural stability in high-temperature environments, avoiding damage to the roller surface or thermal deformation during clamping.

[0028] Under the combined conditions of high temperature and axial force on the ceramic roller, the electric push rod 8 is activated, pushing the hardness tester 9 vertically downward through the test opening. Its indenter contacts the surface of the roller and applies a standard test force to complete the hardness test under high temperature conditions. The hardness tester 9 collects the indentation depth and hardness value in real time and transmits the data to the controller 2 for recording and analysis. At the same time, the vision camera 10 captures images of the indentation area. The camera is equipped with a high-temperature resistant protective window to effectively isolate heat radiation and protect the imaging element. Through image processing algorithms, the controller 2 can automatically identify the indentation contour and accurately calculate the hardness value, significantly improving the accuracy and repeatability of the measurement.

[0029] The entire testing process is completed at high temperature, eliminating the need to cool the rollers to room temperature. This avoids performance distortion caused by thermal stress release and microstructural changes during cooling, ensuring that the test results accurately and reliably reflect the mechanical properties of the ceramic rollers under actual high-temperature conditions.

Claims

1. A device for detecting the hardness of ceramic rollers at high temperatures, characterized in that: The system includes a testing chamber (1), a controller (2), a protective door (3), a locking screw (4), a handle (5), a guide frame (6), a heating coil (7), an electric push rod (8), a hardness tester (9), a vision camera (10), an infrared thermometer (11), and a stress loading mechanism. The controller (2) is installed on the front right side of the testing chamber (1). A protective door (3) is rotatably installed on the left side of the testing chamber (1). A locking screw (4) is threadedly connected between the protective door (3) and the testing chamber (1). A handle (5) is fixedly attached to the outer side of the protective door (3). A guide frame (6) is fixedly attached to the center of the testing chamber (1). The guide frame (6) is ring-shaped and guides... A test opening is provided on the upper part of the middle of the frame (6). A heating coil (7) is arranged around the inner side of the ring guide frame (6). An electric push rod (8) is installed in the upper part of the test chamber (1). The telescopic end of the electric push rod (8) is directly above the test opening. A hardness tester (9) is connected to the telescopic end of the electric push rod (8). An infrared thermometer (11) and a vision camera (10) are installed on the left and right sides of the upper part of the hardness tester (9). A stress loading mechanism is provided on the right side inside the test chamber (1). The controller (2) is electrically connected to the heating coil (7), the electric push rod (8), the hardness tester (9), the vision camera (10), and the infrared thermometer (11).

2. The ceramic roller hardness testing device under high temperature as described in claim 1, characterized in that: The stress loading mechanism includes a hydraulic push rod (12), a connecting frame (13), a clamping member (14), a bidirectional screw (15), and a motor (16). The hydraulic push rod (12) is installed on the right side inside the detection chamber (1). The connecting frame (13) is connected to the telescopic end of the hydraulic push rod (12). The clamping member (14) is slidably provided on both the front and rear sides of the connecting frame (13), and the two clamping members (14) are arranged symmetrically. The bidirectional screw (15) is rotatably connected to the right side of the connecting frame (13). The two clamping members (14) are threaded to the left-hand and right-hand sections of the bidirectional screw (15), respectively. The motor (16) is installed on one side of the connecting frame (13). The motor (16) and the hydraulic push rod (12) are electrically connected to the controller (2). The output shaft of the motor (16) is connected to the bidirectional screw (15).

3. The ceramic roller hardness testing device under high temperature as described in claim 2, characterized in that: It also includes a warning light (17). A warning light (17) is installed on the right side of the front of the detection chamber (1). The warning light (17) is electrically connected to the controller (2).

4. The ceramic roller hardness testing device under high temperature as described in claim 3, characterized in that: It also includes a pressure gauge (18) and a pressure relief valve (19). The pressure gauge (18) is located on the left side of the front of the detection chamber (1). The pressure gauge (18) is connected to the inside of the detection chamber (1). The pressure gauge (18) is equipped with a pressure relief valve (19). Both the pressure gauge (18) and the pressure relief valve (19) are electrically connected to the controller (2).

5. The ceramic roller hardness testing device under high temperature as described in claim 4, characterized in that: It also includes an observation window (101), with observation windows (101) installed on both the front and rear sides of the left side of the detection chamber (1).

6. The ceramic roller hardness testing device under high temperature as described in claim 5, characterized in that: The clamping parts (14) are all made of silicon nitride ceramic material, and the vision camera (10) is fitted with a high-temperature resistant protective window.

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