A high temperature physical property tester

Abstract

The invention discloses a high-temperature physical property measuring instrument, comprising a bed, an operating platform is fixedly installed on the upper surface of the bed, a furnace is fixedly arranged at the center position of the upper surface of the operating platform, a sample tube for placing samples is arranged on one side of the furnace, an axial fine-tuning device for driving the sample tube with the samples to rotate along its own axis is arranged at the end of the sample tube, a sample fine-tuning slide is installed below the axial fine-tuning device, and a mobile sample feeding device for driving the sample fine-tuning slide, the axial fine-tuning device and the sample tube to reciprocate along the length direction of the operating platform is arranged below the sample fine-tuning slide. The invention has a reasonable design structure and is easy to use. A plc control system is adopted to automatically operate the measuring instrument, and the operation is simple. The axial fine-tuning device can be used to perform horizontal rotation adjustment on the sample, and the sample position can be fine-tuned by using the sample fine-tuning slide.

Description

Technical Field

[0001] The invention belongs to the technical field of detection devices, and in particular relates to a high-temperature physical property measuring instrument. Background Art

[0002] High temperature physical property tester is also called high temperature physical property tester. It can detect the melting point and melting rate of various metals, inorganic compounds or mixtures from solid to liquid during heating, and has the ability to test the melting point and melting rate of samples. Shielding slag is an indispensable auxiliary material for modern continuous casting process. In the continuous casting process, the melting characteristics of shielding slag directly affect the quality of the ingot. Therefore, the development of a tester that can quickly and accurately measure the melting point and melting rate of shielding slag has extremely important guiding significance for actual industrial production.

[0003] Existing measuring instruments for melting point and melting rate use high-speed cameras to measure the temperature characteristics (melting point and melting rate) of samples, that is, use high-speed cameras to shoot the entire melting process of the samples. However, the existing measuring instruments have many defects during use, which are mainly reflected in the fact that the existing measuring instruments cannot accurately adjust the position and angle of the samples, resulting in the camera being unable to accurately shoot the melting process of the samples. In addition, when the existing cameras are used, if the temperature in the furnace is too high, the melting process of the samples cannot be clearly shot, resulting in blurred images and inaccurate test results. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high-temperature physical property measuring instrument, which has a reasonable design structure and is easy to use. A PLC control system is used to automatically operate the measuring instrument, and the operation is simple. The axial fine-tuning device can be used to rotate the sample in the horizontal direction, and the sample position can be fine-tuned using a sample loading fine-tuning slide. At the same time, the camera fine-tuning slide can be used to arbitrarily fine-tune the rotation angle, left and right up and down positions, and front and back positions of the camera to ensure that a clear detection picture can be captured. A filter shielding device is arranged between the camera and the sample. When the furnace temperature is too high, the filter shielding device can be used to enable the camera to capture a clear picture and obtain accurate detection data. The work efficiency is high and the accuracy is accurate.

[0005] The technical solution adopted by the present invention is: a high-temperature physical property tester, comprising a bed, an operating platform is fixedly installed on the upper surface of the bed, a furnace is fixedly arranged at the center of the upper surface of the operating platform, a sample tube for placing a sample is arranged on one side of the furnace, an axial fine-tuning device for driving the sample tube with the sample to rotate along its own axis is arranged at the end of the sample tube, a sample fine-tuning slide is installed below the axial fine-tuning device, a mobile sample delivery device for driving the sample fine-tuning slide, the axial fine-tuning device and the sample tube to reciprocate along the length direction of the operating platform is arranged below the sample fine-tuning slide, and the mobile sample delivery device is installed above the operating platform;

[0006] A camera is provided on the other side of the furnace, and a camera fine-tuning slide is provided below the camera. A camera horizontal moving device is provided below the camera fine-tuning slide, which can make the camera reciprocate horizontally along the length direction of the operating platform. A filter shielding device is installed at the front end of the camera to ensure that the camera can capture clear pictures when the furnace temperature is too high. An expansion elimination mechanism is provided between the filter shielding device and the furnace. The expansion elimination mechanism is used to install lenses and to offset damage to the expansion elimination mechanism caused by stress concentration when the temperature inside the furnace rises. The expansion elimination mechanism is installed on the side of the furnace.

[0007] The sample-loading tube is a tubular structure with a recessed step at the front end. A recessed platform is provided at the front end of the recessed step. The sample-loading platform is installed in the recessed platform. A sample-loading plate is installed on the top of the sample-loading plate. A sample is placed above the sample-loading plate. A thermocouple is installed at the front end of the sample-loading tube for measuring the temperature of the sample on the sample-loading platform in the furnace.

[0008] The axial fine-tuning device includes a base, which is fixedly arranged at the bottom position of the shell, the shell is in an arc shape, the planetary gear reducer is fixedly arranged inside the shell, the flange is fixedly arranged at the rear end position of the shell, the flange is fixedly connected to the outer gear ring of the planetary gear reducer, and is used to fix the planetary gear reducer; the front end of the reducer shaft is fixedly connected to the center gear of the planetary gear reducer, the rear end of the reducer shaft extends to the rear end of the shell, and passes through the back cover and is fixedly connected to the knob; the stainless steel bead is fixedly arranged at the bottom position of the knob, the mounting thread hole is opened at the bottom position of the knob, the outer surface of the stainless steel bead is provided with a thread, the stainless steel bead is tightened and fixed in the mounting thread hole from the rear end of the knob, the stainless steel bead is in tight contact with the back cover, a fixed sleeve 1 is fixedly connected to the front end of the flange, a fixed sleeve 2 is slidably connected in the fixed sleeve 1, and the sample tube is fixedly installed at the front end position of the fixed sleeve 1.

[0009] The mobile sample feeding device includes a slide rail, which is fixedly arranged at the upper position of the operating platform, and the slide rail is symmetrically arranged front to back; the stepper motor fixing frame is fixedly arranged at the right end position of the slide rail, the stepper motor is fixedly arranged at the inner position of the stepper motor fixing frame, the screw rod passes through the left and right ends of the U-shaped plate and the middle position of the H-shaped moving block, the left end of the screw rod is connected and fixed to the left position of the U-shaped plate through a thread hole, and the right end of the screw rod is fixedly connected to the power output shaft of the stepper motor; the U-shaped plate is fixedly arranged at the upper position of the slide rail, the pad is fixedly arranged at the upper position of the H-shaped moving block, the bottom of the H-shaped moving block is mounted on the slide rail, the upper part of the H-shaped moving block extends to the upper position of the pad, and the connecting plate in the middle of the H-shaped moving block is lower than the position of the pad; a photoelectric switch is installed at the front end position of the H-shaped moving block.

[0010] The camera horizontal moving device comprises a guide rail installed on the upper surface of the operating platform, a slider which can reciprocate along the length direction of the guide rail is slidably installed on the guide rail, and the camera fine-tuning slide is installed at the top position of the slider.

[0011] The filter shielding device includes a connecting frame installed on the top of the camera fine-tuning slide and having a Z-shaped structure. A motor fixing frame is connected to the end of the connecting frame. The motor fixing frame has an L-shaped structure. The horizontal plate of the motor fixing frame is fixedly connected to the connecting frame. The vertical plate of the motor fixing frame is fixedly installed with a motor, and the filter assembly is installed on the shaft end of the motor.

[0012] The filter assembly includes a filter lens that can rotate around the axis of the motor, the center line of the highest point of the filter lens coincides with the center line of the camera, a filter sensor is fixedly installed at the end of the motor shaft, extension plates extending outward are provided on both sides of the filter sensor, and the center lines of the two extension plates form an angle of 180°, a filter fixing flange is fixedly installed at the end of the motor shaft, a filter fixing plate is installed at the end of the filter fixing flange, the filter lens is installed at the end position of the filter fixing plate, a sensor fixing plate is respectively installed at the front end and the side of the motor fixing frame, and a photoelectric sensor is fixedly installed on the surface of the sensor fixing plate.

[0013] The expansion elimination mechanism includes an observation port support angle steel installed on the left side of the furnace, the observation port support angle steel is an L-shaped structure, the vertical plate of the observation port support angle steel is fixedly connected to the side wall of the furnace, shaft fixing seats are installed at both ends above the horizontal plate of the observation port support angle steel, two optical axes parallel to each other and at the same height are fixedly installed between the two shaft fixing seats, an observation port plate embedded with a copper sleeve is slidably connected at the outer diameter of the optical axis, a horizontal sleeve made of corundum is installed on the observation port plate, the center line of the sleeve is at the same height as the center of the camera, the sleeve is located at the upper position inside the observation port plate and is provided with an observation port arc surface clamping block inside, a clamping screw for clamping the observation port arc surface clamping block is installed on the top of the observation port plate, an observation port fixing flange is installed at the front end of the observation port plate, a lens cover adapter flange is fixedly installed at the end of the observation port fixing flange, a lens mounting cover is installed at the end of the lens cover adapter flange, a thermocouple mounting hole and a threading hole for mounting a thermocouple are opened at the radial position of the observation port fixing flange, and the threading hole is opened on the side close to the lens cover adapter flange.

[0014] A sample placing table is fixedly installed at the right side of the furnace, and a sample entrance is arranged on the right side of the furnace, and a heat insulation sleeve is installed at the entrance.

[0015] An electric power control cabinet is installed at one side below the bed, and a PLC control module is built into the control cabinet. An operation panel for operating the measuring instrument is installed on the front surface of the operation platform, and a plurality of operation buttons are provided on the operation panel.

[0016] When using this high temperature physical property tester:

[0017] 1. Setting of sample position movement parameters of sample delivery device: 1. Set the distance from the origin sample position to the layout position in the PLC control module, and set the distance from the layout position to the sample measurement position. 2. Set the starting pulse frequency of the stepper motor to 0 through the PLC control module, and set the acceleration and deceleration rates of the stepper motor to every 4 milliseconds / 1600 Hz (the values ​​can be set and modified as needed).

[0018] 2. Sample (fine adjustment of the position of the sample tube): First, the operator controls the operation button, and then moves the sample tube to the position of the insulation sleeve by moving the H-shaped moving block of the sample feeding device. The operator uses tweezers to clamp the sample from the sample placement table and place it in the center of the sample plate; after the sample enters the furnace, the front and back and up and down positions of the sample tube are finely adjusted by the sample fine-tuning slide, so that the sample image can be observed and fully displayed through the camera; at this time, if the sample is tilted front and back, the nut of the sample fine-tuning slide can be used to make the sample in a vertical state to ensure that the sample is in an upright state. When the camera at the left end of the furnace observes that the sample at the right end is tilted to the left lower and the right higher, the operator rotates the knob counterclockwise at this time, and the knob drives the sample to rotate during the rotation. The reducer shaft rotates, and during the rotation of the reducer shaft, the planetary gear reducer is driven to rotate. The central gear of the planetary gear reducer drives the circumferential gear to rotate, and at the same time drives the outer gear ring of the planetary gear reducer to rotate, and at the same time causes the flange to rotate. During the rotation of the flange, the sample tube, the sample platform, the sample plate and the sample are driven to rotate counterclockwise, and finally the sample is adjusted to a horizontal state; during the rotation of the knob, the stainless steel bead is in a tight contact state with the back cover. At this time, the friction between the stainless steel bead and the back cover is used to play a damping role. At the same time, combined with the cooperation of the central gear, circumferential gear and outer gear ring of the planetary gear reducer, the sample tube (that is, the rotation adjustment accuracy of the sample tube) is improved, and finally the precise rotation adjustment of the sample tube is achieved.

[0019] 3. Movement process of the sample delivery device: First, press the operation button to enter the automatic control mode of sample advancement controlled by the PLC control module. At this time, the PLC control module controls the stepper motor of the mobile sample delivery device to start with a pulse frequency of 0, and drives the H-shaped moving block to move to the left on the slide rail through the screw rotation with an acceleration rate of every 4 milliseconds / 1600 Hz. When the stepper motor accelerates to the set maximum pulse frequency, it runs smoothly. After running for a distance, it also reaches the preset distance of the sample placement position at a deceleration rate of every 4 milliseconds / 1600 Hz. At this time, the pulse frequency of the stepper motor is 0, and it stops at the sample placement position. Then the operator uses tweezers to grab the sample on the sample placement table and place it in the upper center of the sample carrier; then press the operation button, and then enter the automatic control by the PLC control module to send the sample to the test sample position inside the heat-saturating tube inside the furnace. When the sample placement button is pressed After pressing the OK button, if the operator finds that the sample is dumped or crushed on the sample carrier, please press the Stakeout Exit button immediately. At this time, the program will be automatically exited under the automatic control of the PLC control module. The sample will automatically drive the H-shaped moving block to move to the right on the slide rail to the origin sample position through the rotation of the screw rod. At this time, the photoelectric switch detects the signal of reaching the origin sample position and transmits it to the PLC control module. The PLC control module automatically controls to stop and finally cleans up the dumped or crushed sample. Then repeat the above operation to place the sample, and press the Stakeout OK button again. At this time, the program will be automatically controlled by the PLC control module to send the sample to the test sample position inside the heat-saturating tube inside the furnace to measure the melting point and melting rate of the sample. When the measurement is completed, press the Sample Position Back button to enter the program automatically controlled by the PLC control module to automatically move the sample tube to the origin position. The melting point and melting rate measurement of the entire sample is completed.

[0020] 4. Accurate adjustment of the camera position; after adjusting the camera position to the appropriate position through the camera horizontal moving device, the camera can be further fine-tuned using the camera fine-tuning slide, so that the camera center line, the highest point of the filter lens, and the sample are ultimately in the same straight line. The filter shielding device is used to use a motor to drive the filter sensor, the filter fixing flange, and the filter fixing plate to rotate synchronously after the temperature in the furnace rises. When the filter lens rotates to the highest point (i.e., the position where the filter lens is at the same height as the camera), the motor stops rotating, completing the shielding process. The camera shoots the picture with the filter lens shielded to avoid unclear pictures caused by temperature changes.

[0021] 5. Use of expansion elimination device: When the camera takes a picture of the test, the light passes through the elimination device and captures the sample in the furnace of the heating furnace to realize image monitoring. In this process, the sample gradually melts as the temperature in the furnace increases. As the furnace temperature increases, the sleeve extending into the furnace will undergo thermal expansion. Since the sleeve is made of corundum, it is resistant to high temperatures and has high strength. After being heated, when the stress of the entire device is concentrated due to thermal expansion, the observation port plate can slide along the axial direction of the optical axis to release the stress and avoid damage to the structure of the entire device due to stress concentration.

[0022] A sample tube for placing samples is provided on one side of the furnace, an axial fine-tuning device for driving the sample tube with the samples to rotate along its own axis is provided at the end of the sample tube, a sample fine-tuning slide is installed below the axial fine-tuning device, a mobile sample delivery device for driving the sample fine-tuning slide, the axial fine-tuning device and the sample tube to reciprocate along the length direction of the operating platform is provided below the sample fine-tuning slide, and the mobile sample delivery device is installed above the operating platform; the purpose of such arrangement is: the sample tube is used to place samples, and when testing, the samples are extended into the internal position of the furnace, the axial fine-tuning device is used to drive the sample tube to rotate along its own axis to achieve the purpose of rotation adjustment during the placement process of the test, the sample fine-tuning slide is used to further fine-tune the test, including fine-tuning in the front and back, left and right, and horizontal and tilting directions, and the mobile sample delivery device is used to move the sample to the inside of the furnace after the position of the sample is determined.

[0023] A camera fine-tuning slide is provided below the camera, and a camera horizontal moving device is provided below the camera fine-tuning slide for driving the camera to reciprocate in the horizontal direction along the length direction of the operating platform. The purpose of this arrangement is: the camera horizontal moving device is used to horizontally adjust the position of the camera. After the camera position is determined, the camera horizontal moving device can be locked. In subsequent use, it is only necessary to use the upper camera fine-tuning slide for fine-tuning. The range of fine-tuning includes the front and back, left and right, up and down, and horizontal tilt directions of the camera.

[0024] A filter shielding device is installed at the front end of the camera to ensure that the camera can capture clear images when the furnace temperature is too high. The purpose of this setting is to adapt to image acquisition work at different temperatures, so that the final detection image can be clear, which is conducive to improving the accuracy of detection.

[0025] The beneficial effects of the present invention are:

[0026] The present invention has a reasonable design structure and is easy to use. It adopts a PLC control system to automatically operate the measuring instrument, and is simple to operate. It can use an axial fine-tuning device to rotate and adjust the sample in the horizontal direction, and use a sample loading fine-tuning slide to fine-tune the sample position. At the same time, the camera fine-tuning slide can be used to arbitrarily fine-tune the rotation angle, left and right up and down positions, and front and back positions of the camera to ensure that a clear detection picture can be captured. A filter shielding device is arranged between the camera and the sample, so that when the furnace temperature is too high, the filter shielding device can be used to enable the camera to capture a clear picture, and finally the data is fed back to the computer through the PLC control system to obtain accurate detection data, with high working efficiency and accurate precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A perspective view of the present invention;

[0028] Figure 2 It is a front view of the present invention;

[0029] Figure 3 This is a structural diagram of the connection between the sample-carrying tube and the axial fine-tuning device of the present invention;

[0030] Figure 4 It is a partially enlarged stereoscopic view of the front end of the sample-carrying tube of the present invention;

[0031] Figure 5 It is a partial enlarged view of the axial fine adjustment device of the present invention;

[0032] Figure 6 It is a three-dimensional structural diagram of the connection of the mobile sample delivery device, the sample loading fine adjustment slide, the axial fine adjustment device and the sample loading tube of the present invention;

[0033] Figure 7 It is a three-dimensional structural diagram of the camera horizontal moving device of the present invention;

[0034] Figure 8 It is a three-dimensional structural diagram of the expansion elimination mechanism of the present invention;

[0035] Fig. 9 is a cross-sectional view of the expansion elimination mechanism of the present invention;

[0036] Fig.10 A three-dimensional view of the filter shielding device of the present invention;

[0037] Fig.11 is a three-dimensional view of the filter assembly of the present invention;

[0038] Fig.12 It is a plan view of the filter shielding device of the present invention.

[0039] Markings in the figure: 1. Bed; 2. Operating platform;

[0040] 3. Mobile sample feeding device; 301. Slide rail; 302. U-shaped plate; 303. Pad; 304. H-shaped moving block; 305. Stepper motor fixing bracket; 306. Stepper motor; 307. Screw rod; 308. Photoelectric switch;

[0041] 4. Sample loading fine adjustment slide;

[0042] 5. Axial fine-tuning device; 501. Base; 502. Shell; 503. Flange; 504. Fixing sleeve 1; 505. Fixing sleeve 2; 506. Planetary gear reducer; 507. Back cover; 508. Knob; 509. Stainless steel ball; 510. Mounting thread hole; 511. Reducer shaft;

[0043] 6. Sample tube; 601. Concave step; 602. Sample platform; 603. Concave platform; 604. Sample plate; 605. Sample; 606. Thermocouple 1;

[0044] 7. Sample placement table; 8. Thermal insulation sleeve; 9. Furnace;

[0045] 10. Expansion elimination mechanism; 1001. Observation port support angle steel; 1002. Shaft fixing seat; 1003. Observation port plate; 1004. Casing; 1005. Compression screw; 1006. Observation port fixing flange; 1007. Lens cover adapter flange; 1008. Lens mounting cover; 1009. Optical axis; 1010. Copper sleeve; 1011. Threading hole; 1012. Thermocouple mounting hole; 1013. Observation port arc surface compression block;

[0046] 11. filter shielding device; 1101. connecting frame; 1102. motor fixing frame; 1103. sensor fixing plate; 1104. photoelectric sensor; 1105. motor; 1106. filter lens; 1107. filter fixing plate; 1108. filter fixing flange; 1109. filter sensor plate; 1110. extension plate;

[0047] 12. Camera; 13. Camera fine-tuning slide;

[0048] 14. Camera horizontal moving device; 1401. Guide rail; 1402. Slider;

[0049] 15. Operation panel; 16. Control cabinet. DETAILED DESCRIPTION

[0050] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0051] As shown in the figure, a high-temperature physical property measuring instrument includes a bed 1, an operating platform 2 is fixedly installed on the upper surface of the bed 1, and a furnace 9 is fixedly set at the center position of the upper surface of the operating platform 2, wherein the furnace 9 adopts a silicon-molybdenum rod heating method, and the furnace 9 is a tubular furnace structure, and refractory materials are used for heat insulation, and it has the characteristics of small furnace body volume, small heating power, and rapid heating. A sample tube 6 for placing a sample 605 is provided on one side of the furnace 9, and an axial fine-tuning device 5 is provided at the end of the sample tube 6 for driving the sample tube 6 with the sample 605 to rotate along its own axis. A sample fine-tuning slide 4 is installed below the axial fine-tuning device 5, and a mobile sample feeding device 3 is provided below the sample fine-tuning slide 4 for driving the sample fine-tuning slide 4, the axial fine-tuning device 5 and the sample tube 6 to reciprocate along the length direction of the operating platform 2, and the mobile sample feeding device 3 is installed above the operating platform 2;

[0052] A camera 12 is provided on the other side of the furnace 9, and a camera fine-tuning slide 13 is provided below the camera 12. A camera horizontal moving device 14 is provided below the camera fine-tuning slide 13 for driving the camera 12 to reciprocate horizontally along the length direction of the operating platform 2. A filter shielding device 11 is installed at the front end of the camera 12 to ensure that the camera 12 can capture a clear picture when the temperature of the furnace 9 is too high. An expansion elimination mechanism 10 is provided between the filter shielding device 11 and the furnace 9. The expansion elimination mechanism 10 is used to install a lens and to offset the damage of the expansion elimination mechanism 10 caused by stress concentration when the temperature inside the furnace 9 rises. The expansion elimination mechanism 10 is installed on the side of the furnace 9.

[0053] The above-mentioned sample fine-tuning slide 4 and camera fine-tuning slide 13 are manual slides with micro-adjustment function commonly used in the prior art. Their structural principles are not elaborated here. The five-axis and six-axis slides manufactured by Dongguan Chengkun Hardware Electronic Technology Co., Ltd. are adopted. Among them, the camera fine-tuning slide 13 has a five-axis adjustment function, and the sample fine-tuning slide 4 has a six-axis adjustment function. The positions of the camera 12 and the sample tube 6 can be accurately adjusted to achieve the best detection effect.

[0054] The sample-carrying tube 6 is a tubular structure with a recessed step 601 at the front end. A recessed platform 603 is provided at the front end of the recessed step 601. A sample-carrying platform 602 is installed in the recessed platform 603. A sample-carrying sheet 604 is installed on the top of the sample-carrying sheet 602. A sample 605 is placed above the sample-carrying sheet 604. A thermocouple 606 is installed at the front end of the sample-carrying tube 6. The thermocouple 606 is connected to a PLC control module. The measuring instrument is connected to a computer for data display and is used to measure the temperature of the left end of the sample-carrying tube 6 in the furnace 9.

[0055] The axial fine-tuning device 5 comprises a base 501, which is fixedly arranged at the bottom position of a housing 502, the housing 502 is arc-shaped, a planetary gear reducer 506 is fixedly arranged inside the housing 502, a flange 503 is fixedly arranged at the rear end position of the housing 502, and the flange 503 is fixedly connected to the outer gear ring of the planetary gear reducer 506, and is used to fix the planetary gear reducer 506; the front end of the reducer shaft 511 is fixedly connected to the central gear of the planetary gear reducer 506, and the rear end of the reducer shaft 511 extends to the rear end of the housing 502 and passes through The back cover 507 is fixedly connected to the knob 508; the stainless steel bead 509 is fixedly arranged at the bottom position of the knob 508, the mounting thread hole 510 is opened at the bottom position of the knob 508, the outer surface of the stainless steel bead 509 is provided with a thread, the stainless steel bead 509 is tightened and fixed in the mounting thread hole 510 from the rear end of the knob 508, the stainless steel bead 509 is in tight contact with the back cover 507, a fixed sleeve 504 is fixedly connected to the front end of the flange 503, a fixed sleeve 505 is slidably connected inside the fixed sleeve 504, and the sample tube 6 is fixedly installed at the front end position of the fixed sleeve 504.

[0056] The mobile sample feeding device 3 includes a slide rail 301, which is fixedly arranged at the upper position of the operating platform 2, and the slide rail 301 is symmetrically arranged front to back; a stepper motor fixing frame 305 is fixedly arranged at the right end position of the slide rail 301, and a stepper motor 306 is fixedly arranged at the inner position of the stepper motor fixing frame 305. The screw rod 307 passes through the left and right ends of the U-shaped plate 302 and the middle position of the H-shaped moving block 304. The left end of the screw rod 307 is connected and fixed to the left side position of the U-shaped plate 302 through a screw hole. The right end of the rod 307 is fixedly connected to the power output shaft of the stepper motor 306; the U-shaped plate 302 is fixedly set at the upper position of the slide rail 301, and the pad 303 is fixedly set at the upper position of the H-shaped moving block 304. The bottom of the H-shaped moving block 304 is mounted on the slide rail 301, and the upper part of the H-shaped moving block 304 extends to the upper position of the pad 303. The connecting plate in the middle of the H-shaped moving block 304 is lower than the position of the pad 303; a photoelectric switch 308 is installed at the front end position of the H-shaped moving block 304.

[0057] The camera horizontal moving device 14 includes a guide rail 1401 installed on the upper surface of the operating platform 2, on which a slider 1402 is slidably installed and can reciprocate along the length direction of the guide rail 1401, and the camera fine-tuning slide 13 is installed at the top position of the slider 1402.

[0058] The filter shielding device 11 includes a connecting frame 1101 installed on the top of the camera fine-tuning slide 13 and having a Z-shaped structure. A motor fixing frame 1102 is connected to the end of the connecting frame 1101. The motor fixing frame 1102 has an L-shaped structure. The horizontal plate of the motor fixing frame 1102 is fixedly connected to the connecting frame 1101. The vertical plate of the motor fixing frame 1102 is fixedly installed with a motor 1105, and the shaft end of the motor 1105 is installed with a filter assembly.

[0059] The filter assembly includes a filter lens 1106 that can rotate around the axis of the motor 1105, the center line of the highest point of the filter lens 1106 coincides with the center line of the camera 12, a filter sensor plate 1109 is fixedly installed at the shaft end of the motor 1105, and extension plates 1110 extending outward are provided on both sides of the filter sensor plate 1109, and the center lines of the two extension plates 1110 form an angle of 180°, a filter fixing flange 1108 is fixedly installed at the shaft end of the motor 1105, a filter fixing plate 1107 is installed at the end of the filter fixing flange 1108, the filter lens 1106 is installed at the end position of the filter fixing plate 1107, and a sensor fixing plate 1103 is respectively installed at the front end and side of the motor fixing frame 1102, and a photoelectric sensor 1104 is fixedly installed on the surface of the sensor fixing plate 1103.

[0060] The expansion elimination mechanism 10 includes an observation port support angle steel 1001 installed on the left side of the furnace 9, the observation port support angle steel 1001 is L-shaped, the vertical plate of the observation port support angle steel 1001 is fixedly connected to the side wall of the furnace 9, and shaft fixing seats 1002 are installed at both ends above the horizontal plate of the observation port support angle steel 1001. Two optical axes 1009 parallel to each other and at the same height are fixedly installed between the two shaft fixing seats 1002. An observation port plate 1003 embedded with a copper sleeve 1010 is slidably connected at the outer diameter of the optical axis 1009. A horizontal sleeve 1004 made of corundum is installed on the observation port plate 1003. The center line of the sleeve 1004 is at the same height as the center of the camera 12. The sleeve 1004 is located at a right angle to the observation port plate 1003. An observation port arc surface clamping block 1013 is provided at the upper position inside the observation port plate 1003, a clamping screw 1005 for clamping the observation port arc surface clamping block 1013 is installed on the top of the observation port plate 1003, an observation port fixing flange 1006 is installed at the front end of the observation port plate 1003, a lens cover adapter flange 1007 is fixedly installed at the end of the observation port fixing flange 1006, a lens mounting cover 1008 is installed at the end of the lens cover adapter flange 1007, a thermocouple mounting hole 1012 and a threading hole 1011 for mounting a thermocouple are provided in the radial position of the observation port fixing flange 1006, and the threading hole 1011 is provided on a side close to the lens cover adapter flange 1007.

[0061] A sample placement table 7 is fixedly installed at the right side of the furnace 9, and an entrance for the sample 605 is provided on the right side of the furnace 9, and a heat insulation sleeve 8 is installed at the entrance.

[0062] An electric power control cabinet 16 is installed at one side below the bed 1 , and a PLC control module is built into the control cabinet 16 . An operation panel 15 for operating the measuring instrument is installed on the front surface of the operation platform 2 , and a plurality of operation buttons are provided on the operation panel 15 .

[0063] In addition, in order to quickly cool down the inside of the furnace 9 after the detection is completed, the air source (air pump) can be connected through a pneumatic pipeline, a solenoid valve is set in the middle of the pneumatic pipeline, the solenoid valve is connected to the PLC control module, and the end of the pneumatic pipeline extends to the inside of the furnace 9. The air source is pneumatic to introduce outside air into the furnace 9 to reduce the temperature inside the furnace 9.

[0064] When using this high temperature physical property tester:

[0065] 1. Setting of sample position movement parameters of the sample delivery device: 1. Set the distance from the origin sample position to the sample placement position in the PLC control module, and set the distance from the sample placement position to the sample measurement position. 2. Set the starting pulse frequency of the stepper motor 306 to 0 through the PLC control module, and set the acceleration rate and deceleration rate of the stepper motor 306 to every 4 milliseconds / 1600 Hz (the value can be set and modified as needed).

[0066] 2. Sample 605 (fine adjustment of the position of the sample tube 6): First, the operator controls the operation button to unlock the stepper motor 306, and then moves the sample tube 6 to the position of the thermal insulation sleeve 8 by moving the H-shaped moving block 304 of the sample feeding device 3. The operator uses tweezers to clamp the sample 605 from the sample placement table 7 and place it at the center of the sample plate 604; the front and back and up and down positions of the sample tube 6 are finely adjusted by the sample fine-tuning slide 4, so that the image of the sample 605 can be observed and fully displayed through the camera 12; at this time, if the sample 605 is tilted forward and backward, the nut of the sample fine-tuning slide 4 can be used to make the sample 605 in a vertical state to ensure that the sample 605 is in an upright state. When the camera 12 at the left end of the furnace 9 observes that the sample 605 at the right end is tilted to the left lower and the right higher, the operator rotates the knob 508 counterclockwise at this time. The knob 508 drives the reduction during the rotation. The reducer shaft 511 rotates, and during the rotation of the reducer shaft 511, the planetary gear reducer 506 is driven to rotate. The central gear of the planetary gear reducer 506 drives the circumferential gear to rotate, and at the same time drives the outer gear ring of the planetary gear reducer 506 to rotate, and at the same time rotates the flange 503. During the rotation of the flange 503, the sample tube 6, the sample loading platform 602, the sample loading plate 604 and the sample 605 are driven to rotate counterclockwise, and finally the sample 605 is adjusted to a horizontal state; during the rotation of the knob 508, the stainless steel ball 509 is in a tight contact state with the back cover 507. At this time, the friction between the stainless steel ball 509 and the back cover 507 is used to play a damping role. At the same time, combined with the cooperation of the central gear, circumferential gear and outer gear ring of the planetary gear reducer 506, the sample tube 6 (that is, the rotation adjustment accuracy of the sample tube 6) is improved, and finally the precise rotation adjustment of the sample tube 6 is achieved.

[0067] 3. Movement process of the sample delivery device: First, press the operation button to enter the automatic control mode of sample advancement controlled by the PLC control module. At this time, the PLC control module controls the stepper motor 306 of the mobile sample delivery device 3 to start with a pulse frequency of 0, and drives the H-shaped moving block 304 to move to the left on the slide rail 301 through the screw rod 307 at an acceleration rate of every 4 milliseconds / 1600 Hz. When the stepper motor 306 accelerates to the set maximum pulse frequency, it runs smoothly. After running for a distance, it also reaches the preset distance of the sample placement position at a deceleration rate of every 4 milliseconds / 1600 Hz. At this time, the pulse frequency of the stepper motor 306 is 0, and it stops at the sample placement position. Then the operator uses tweezers to clamp the sample 605 on the sample placement table 7 and place it at the upper center position of the sample carrier 604; then press the operation button, and then enter the automatic control by the PLC control module to send the sample 605 to the test sample 605 position inside the heat-saturating tube inside the furnace 9. When the sample placement confirmation key is pressed, When the operator finds that the sample 605 is dumped or crushed on the sample carrier 604, please press the layout exit key immediately. At this time, the automatic exit program automatically controlled by the PLC control module will be entered. The sample 605 will automatically drive the H-shaped moving block 304 to move to the right on the slide rail 301 through the rotation of the screw rod 307 to move the origin sample position. At this time, the photoelectric switch 308 detects the signal of reaching the origin sample position and transmits it to the PLC control module. The PLC control module automatically controls to stop and finally cleans up the dumped or crushed sample 605; then repeat the above operation to place the sample 605, and press the layout confirmation key again. At this time, the automatic control by the PLC control module is entered, and the sample 605 is sent to the test sample 605 position inside the heat-saturating tube inside the furnace 9 to measure the melting point and melting rate of the sample 605. When the measurement is completed, press the sample position back key to enter the automatic control by the PLC control module, and the sample carrier tube 6 is automatically moved to the origin position. The melting point and melting rate measurement of the entire sample 605 is completed.

[0068] 4. Accurate adjustment of the position of the camera 12; after adjusting the position of the camera 12 to a suitable position by means of the camera horizontal moving device 14, the camera 12 can be further fine-tuned by means of the camera fine-tuning slide 13, so that the center line of the camera 12 is finally in the same straight line with the highest point of the filter lens 1106 and the sample 605, wherein the filter shielding device 11 is used to drive the filter sensor plate 1109, the filter fixing flange 1108 and the filter fixing plate 1107 to rotate synchronously by means of the motor 1105 after the temperature in the furnace 9 rises, and when the filter lens 1106 rotates to the highest point position (i.e., the position where the filter lens 1106 is at the same height as the camera 12), the motor 1105 stops rotating to complete the shielding process, and the camera 12 takes pictures with the filter lens 1106 shielding, thereby avoiding the problem of unclear pictures caused by temperature changes.

[0069] 5. Use of expansion elimination device; when the camera 12 is shooting the detection picture, the light passes through the elimination device and captures the sample 605 located in the furnace 9 of the heating furnace to realize image monitoring. In this process, the sample 605 gradually melts as the temperature in the furnace 9 increases. As the temperature of the furnace 9 increases, the sleeve 1004 extending into the furnace 9 will undergo thermal expansion. Since the sleeve 1004 is made of corundum, it is resistant to high temperatures and has high strength. After being heated, when the stress of the entire device is concentrated due to thermal expansion, the observation port plate 1003 can slide along the axial direction of the optical axis 1009, thereby releasing the stress and avoiding damage to the entire device structure due to stress concentration.

Claims

1. A high temperature physical property measuring instrument, characterized in that: It comprises a bed, an operating platform is fixedly installed on the upper surface of the bed, a furnace is fixedly arranged at the center of the upper surface of the operating platform, a sample tube for placing samples is arranged on one side of the furnace, an axial fine-tuning device for driving the sample tube with samples to rotate along its own axis is arranged at the end of the sample tube, a sample fine-tuning slide is arranged below the axial fine-tuning device, a mobile sample delivery device for driving the sample fine-tuning slide, the axial fine-tuning device and the sample tube to reciprocate along the length direction of the operating platform is arranged below the sample fine-tuning slide, and the mobile sample delivery device is arranged above the operating platform; A camera is provided on the other side of the furnace, and a camera fine-tuning slide is provided below the camera. A camera horizontal moving device is provided below the camera fine-tuning slide, which can make the camera reciprocate in the horizontal direction along the length direction of the operating platform. A filter shielding device is installed at the front end of the camera to ensure that the camera can collect clear images when the furnace temperature is too high. An expansion elimination mechanism is provided between the filter shielding device and the furnace. The expansion elimination mechanism is used to install the lens and to offset the damage of the expansion elimination mechanism caused by stress concentration when the temperature inside the furnace rises. The expansion elimination mechanism is installed on the side of the furnace; The filter shielding device comprises a filter assembly, the filter assembly comprises a filter lens that can rotate around the axis of the motor, the center line of the highest point of the filter lens coincides with the center line of the camera, a filter sensor is fixedly installed at the end of the motor shaft, extension pieces extending outward are arranged on both sides of the filter sensor, the center lines of the two extension pieces form an angle of 180°, a filter fixing flange is fixedly installed at the end of the motor shaft, a filter fixing piece is installed at the end of the filter fixing flange, the filter lens is installed at the end position of the filter fixing piece, a sensor fixing plate is installed at the front end and the side of the motor fixing frame respectively, and a photoelectric sensor is fixedly installed on the surface of the sensor fixing plate; The expansion elimination mechanism includes two mutually parallel and equal-height optical axes, an observation port plate embedded with a copper sleeve is slidably connected at the outer diameter of the optical axis, a horizontal sleeve made of corundum is installed on the observation port plate, the center line of the sleeve is at the same height as the center of the camera, the sleeve is located at the upper position inside the observation port plate and is provided with an observation port arc surface clamping block inside, a clamping screw for clamping the observation port arc surface clamping block is installed on the top of the observation port plate, an observation port fixing flange is installed at the front end of the observation port plate, a lens cover adapter flange is fixedly installed at the end of the observation port fixing flange, a lens mounting cover is installed at the end of the lens cover adapter flange, a thermocouple mounting hole and a threading hole for installing a thermocouple are opened in the radial position of the observation port fixing flange, and the threading hole is opened on the side close to the lens cover adapter flange.

2. A high temperature physical property measuring instrument according to claim 1, characterized in that: The sample loading tube is a tubular structure with a recessed step at the front end. A recessed platform is provided at the front end of the recessed step. The sample loading platform is installed in the recessed platform. A sample loading plate is installed on the top of the sample loading plate. A sample is placed above the sample loading plate. A thermocouple is installed at the front end of the sample loading tube to measure the temperature of the sample on the sample loading platform in the furnace.

3. A high temperature physical property measuring instrument according to claim 1, characterized in that: The axial fine-tuning device includes a base, which is fixedly arranged at the bottom position of the shell, the shell is in an arc shape, the planetary gear reducer is fixedly arranged inside the shell, the flange is fixedly arranged at the rear end position of the shell, the flange is fixedly connected to the outer gear ring of the planetary gear reducer, and is used to fix the planetary gear reducer; the front end of the reducer shaft is fixedly connected to the center gear of the planetary gear reducer, the rear end of the reducer shaft extends to the rear end of the shell, and passes through the back cover and is fixedly connected to the knob; the stainless steel bead is fixedly arranged at the bottom position of the knob, the mounting thread hole is opened at the bottom position of the knob, the outer surface of the stainless steel bead is provided with a thread, the stainless steel bead is tightened and fixed in the mounting thread hole from the rear end of the knob, the stainless steel bead is in tight contact with the back cover, a fixed sleeve 1 is fixedly connected to the front end of the flange, a fixed sleeve 2 is slidably connected in the fixed sleeve 1, and the sample tube is fixedly installed at the front end position of the fixed sleeve 1.

4. A high temperature physical property measuring instrument according to claim 1, characterized in that: The mobile sample feeding device includes a slide rail, which is fixedly arranged at the upper position of the operating platform, and the slide rail is symmetrically arranged front to back; a stepper motor fixing frame is fixedly arranged at the right end position of the slide rail, and the stepper motor is fixedly arranged at the inner position of the stepper motor fixing frame, and the screw rod passes through the left and right ends of the U-shaped plate and the middle position of the H-shaped moving block, and the left end of the screw rod is connected and fixed to the left position of the U-shaped plate through a thread hole, and the right end of the screw rod is fixedly connected to the power output shaft of the stepper motor; the U-shaped plate is fixedly arranged at the upper position of the slide rail, and the pad is fixedly arranged at the upper position of the H-shaped moving block, the bottom of the H-shaped moving block is mounted on the slide rail, the upper part of the H-shaped moving block extends to the upper position of the pad, and the connecting plate in the middle of the H-shaped moving block is lower than the position of the pad; a photoelectric switch is installed at the front end position of the H-shaped moving block.

5. A high temperature physical property measuring instrument according to claim 1, characterized in that: The camera horizontal moving device comprises a guide rail installed on the upper surface of the operating platform, a slider which can reciprocate along the length direction of the guide rail is slidably installed on the guide rail, and the camera fine-tuning slide is installed at the top position of the slider.

6. A high temperature physical property measuring instrument according to claim 1, characterized in that: The filter shielding device includes a connecting frame installed on the top of the camera fine-tuning slide and having a Z-shaped structure. A motor fixing frame is connected to the end of the connecting frame. The motor fixing frame has an L-shaped structure. The horizontal plate of the motor fixing frame is fixedly connected to the connecting frame. The vertical plate of the motor fixing frame is fixedly installed with a motor, and the filter assembly is installed on the shaft end of the motor.

7. A high temperature physical property measuring instrument according to claim 1, characterized in that: The expansion elimination mechanism includes an observation port support angle steel installed on the left side of the furnace. The observation port support angle steel is an L-shaped structure. The vertical plate of the observation port support angle steel is fixedly connected to the side wall of the furnace. Axis fixing seats are installed at both ends above the horizontal plate of the observation port support angle steel. Two optical axes that are parallel to each other and at the same height are fixedly installed between the two axis fixing seats.

8. A high temperature physical property measuring instrument according to claim 1, characterized in that: A sample placing table is fixedly installed at the right side of the furnace, and a sample entrance is arranged on the right side of the furnace, and a heat insulation sleeve is installed at the entrance.

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