A sample delivery device for high temperature physical property tester

Abstract

The present invention belongs to the technical field of sample delivery of high-temperature physical property testers. The present invention discloses a sample delivery device for high-temperature physical property testers. The PLC control module is fixedly arranged in the middle position of the control cabinet; the sample tube is fixedly arranged at the left end position of the sample tube fixing sleeve, and the thermocouple is fixedly arranged at the left end position of the sample tube; the sample determination key, sample exit key, sample position forward key, sample position backward key and offline key are respectively fixedly connected to the PLC control module and are used to select different control programs of the PLC control module. This invention realizes the multi-directional sample position adjustment of the horizontal position, longitudinal position, vertical position, tilt position, rotation position and axial position of the sample on the sample carrier, improves the moving stability of the sample delivery process, and effectively prevents the sample from tipping over due to the unstable sample delivery, and further crushing the sample.

Description

Technical Field

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

[0002] The sample delivery device is an important equipment component of the high-temperature physical property tester. It is mainly used to adjust the direction and position of the sample delivery device. At the same time, it can automatically deliver the sample used to determine the melting point and melting rate into the tube furnace in the furnace to heat the sample. The high-temperature physical property tester is also called a high-temperature physical property tester. The high-temperature physical property tester can monitor the melting point and melting rate of various metals, inorganic compounds or mixtures from solid to liquid during the heating process. It uses its camera to monitor the entire process. It has two test capabilities for the melting point and melting rate of high-temperature physical properties. Through image acquisition, it can automatically track and judge the height change of the sample at high temperature. At the same time, it can realize the preservation and printing of the test results of the melting point and melting rate of high-temperature physical properties. The test results are traceable and suitable for production inspection and R&D institutions. It has a certain guiding role in the physical and chemical properties, manufacturing and application of high-temperature physical properties. For example, the high-temperature physical property tester is used to determine the melting point and melting rate of protective slag. Protective slag is an indispensable auxiliary material for modern continuous casting process. In the continuous casting process, the melting characteristics of the mold slag directly affect the quality of the ingot. Therefore, the development of a measuring instrument that can quickly and accurately measure the melting point and melting rate of the mold slag has extremely important guiding significance for actual industrial production.

[0003] In the prior art, the sample delivery device of the high-temperature physical property tester mostly uses a lead screw, a motor and a proximity switch to realize the sample delivery function of the sample delivery device that moves left and right. The main problems with the current sample delivery device of the high-temperature physical property tester are: 1. The existing sample tube cannot realize the sample position adjustment of the horizontal position, longitudinal position, vertical position, tilt position, rotation position and axial position, resulting in the sample being placed on the sample carrier, and the above-mentioned multi-directional adjustment of the sample cannot be made, so that the image of the melting point and melting rate of the sample under high temperature conditions cannot be horizontally reflected in the camera detection frame of the high-temperature physical property tester. 2. The existing sample delivery device is not very stable in movement during the sample delivery process, which can easily cause the sample to fall over and cause the sample to crush (the sample itself is a fragile and breakable object). Based on the defects in the prior art, the inventor has developed a sample delivery device for high-temperature physical property testers, which can well solve the technical problems existing in the prior art. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a sample feeding device for a high-temperature physical property tester, which has a simple design structure, is scientific and reasonable, is easy to operate, and has a high degree of automation. The present invention solves the problem that the sample is placed on a sample carrier, and the sample cannot be adjusted in all directions, so that the image of the melting point and melting rate of the sample under high temperature conditions cannot be horizontally reflected in the camera detection frame of the high-temperature physical property tester. At the same time, it also solves the problem that the existing sample feeding device has low stability in movement during the sample feeding process, which easily causes the sample to fall over and lead to sample crushing.

[0005] The technical solution adopted by the present invention is: a sample delivery device for a high-temperature physical property tester, comprising a left bracket, a right bracket, an operating platform, a furnace, and a sample placement table; the left bracket is fixedly arranged at the left side of the right bracket, and the operating platform is fixedly arranged at the upper position of the left bracket and the right bracket; the furnace is fixedly arranged near the left side of the operating platform, and the sample placement table is fixedly arranged at the lower right side of the furnace; the control cabinet is fixedly arranged in the middle position of the left support frame, and the PLC control module is fixedly arranged in the middle position of the control cabinet, for automatically controlling the left and right automatic movement of the mobile sample delivery device; the heat insulation sleeve is fixedly arranged at the lower right side of the furnace, and the mobile sample delivery device is fixedly arranged at the upper right side of the operating platform; the X-axis adjustment slide is fixedly arranged at the upper position of the mobile sample delivery device, the Z-axis adjustment slide is fixedly arranged at the upper position of the X-axis adjustment slide, the tilt adjustment platform is fixedly arranged at the upper position of the Z-axis adjustment slide, and the turntable is fixed It is arranged at the upper position of the tilt adjustment platform; the axial fine-tuning device is fixedly arranged at the upper position of the turntable; the sample tube fixing sleeve is fixedly arranged at the left end position of the axial fine-tuning device, and the fixed thread holes are arranged in a straight line with equal spacing at the upper position of the sample tube fixing sleeve; the sample tube is fixedly arranged at the left end position of the sample tube fixing sleeve, and the thermocouple is fixedly arranged at the left end position of the sample tube, which is used to measure the temperature of the left end of the sample tube in the furnace; the layout confirmation key is fixedly arranged at the left end position of the side of the operating platform, the layout exit key is fixedly arranged at the right position of the layout confirmation key, the sample position forward key is fixedly arranged at the right position of the layout exit key, the sample position backward key is fixedly arranged at the right position of the sample position forward key, and the offline key is fixedly arranged at the right position of the sample position backward key; the layout confirmation key, the layout exit key, the sample position forward key, the sample position backward key and the offline key are fixedly arranged at the right position of the sample position backward key; the layout confirmation key, the layout exit key, the sample position forward key, the sample position backward key and the offline key are respectively fixedly connected to the PLC control module, and are used to select different control programs of the PLC control module.

[0006] The heat insulation sleeve comprises a cylindrical body, which is fixedly arranged at the lower right side of the furnace and connected thereto, and a lofting opening is fixedly arranged at the upper center of the cylindrical body, and the lofting opening is a square opening.

[0007] 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, the stepper motor is fixedly arranged at the inner position of the stepper motor fixing frame, the lead screw 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 lead screw is connected and fixed to the left position of the U-shaped plate through a thread hole, and the right end of the lead screw 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 sleeved 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; the photoelectric switch is fixedly arranged at the rear bottom position of the H-shaped moving block, and the two photoelectric switches are symmetrically arranged in contact with each other left to right; the limit switch is fixedly arranged at the rear position of the slide rail close to the left end, the limit switch is fixedly arranged on the operating platform, and the limit switch and the slide rail are horizontally arranged front to back.

[0008] The photoelectric switch is used to sense the position signals of the sample measuring position and the origin sample position, and the limit switch is used to sense the maximum moving position of the sample rod; the photoelectric switch and the limit switch are fixedly connected to the PLC control module through wires.

[0009] The X-axis adjustment slide is fixedly arranged on the upper position of the mobile sample delivery device pad. By rotating the adjustment nut of the X-axis adjustment slide, it is used to adjust the lateral left and right sliding position of the sample tube; by rotating the adjustment nut of the Z-axis adjustment slide, it is used to adjust the vertical up and down position of the sample tube; by rotating the adjustment nut of the tilt adjustment platform, it is used to adjust the up and down tilt angle of the sample tube; by opening or closing the locking nut of the turntable, it is used to adjust the rotation angle of the sample tube.

[0010] 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 is fixedly connected to the knob through the back cover; 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, and the stainless steel bead is in tight contact with the back cover.

[0011] The sample-carrying tube fixing sleeve includes a sleeve A, which is inserted into a sleeve B. The diameter of sleeve A is smaller than the diameter of sleeve B. The fixing thread hole is a through hole passing through sleeve A and sleeve B. Sleeve A can be telescopically moved in sleeve B. The sample-carrying tube body, sleeve A and sleeve B are tightened and fixed by screws.

[0012] The sample-loading tube includes a sample-loading tube body, a recessed step fixedly arranged at the front end position of the sample-loading tube body, the recessed step is semicircular, the concave platform is fixedly arranged at the front end position of the concave-convex step, the concave platform is a recessed square, the sample loading platform is fixedly placed at the upper position of the concave platform, the sample loading plate is placed at the upper position of the sample loading plate, and the sample is placed at the upper center position of the sample loading plate; the sample-loading tube body is sleeved in sleeve A, and sleeve B is fixedly connected to the front end center position of the flange.

[0013] The sample loading platform comprises a sample loading platform body, which is a square body. The bottom of the sample loading platform body is symmetrically provided with limit convex strips, and the width of the limit convex strips is greater than the width of the concave step.

[0014] The thermocouple is arranged at the right side of the concave platform, the fixing card of the thermocouple is installed in the semicircular concave of the concave step, and the measuring end of the thermocouple for measuring the temperature extends to the bottom position of the concave platform.

[0015] The origin sample position is the position where the right end of the screw is fixedly connected to the power output shaft of the stepper motor; the sample placement position is the position corresponding to the lower part of the sample placement port on the upper part of the insulation sleeve; the sample measurement position is the limit position where the sample loading tube penetrates into the heat equalizing tube of the furnace, that is, the position where the melting point and melting rate of the sample are measured at high temperature.

[0016] The use process of the sample delivery device of the high temperature physical property tester is as follows:

[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.

[0018] 2. Sample (micro-adjustment of the position of the sample tube): First, the operator presses the offline button to unlock the stepper motor. Then, the operator pushes the H-shaped moving block of the sample feeding device to move the sample tube into the heat insulation sleeve and close to the outlet of the heat equalizing tube inside the furnace. At this time, the operator first installs the limiting convex strip of the sample loading platform on the concave platform, and places the sample plate in the center of the sample loading platform. Then, the operator uses tweezers to clamp the sample from the sample placement platform and place it in the center of the sample plate. Micro-adjust the front position of the sample tube by adjusting the nut of the X-axis slide. Adjust the sample stage to the rear position so that there is an equal spacing between the sample stage and the equalizing pipe nozzle inside the furnace. Then use the nut of the Z-axis adjustment slide to fine-tune the up and down position of the sample stage inside the furnace, so that the sample image can be fully displayed when observed by the camera. At this time, if the sample is tilted front and back, the nut of the tilt adjustment platform can be fine-tuned to make the sample vertical. If the sample is vertical but shifted a little to the left or right, the nut of the turntable can be fine-tuned to fine-tune the rotation angle of the sample so that the sample is in a vertical position. When observing through the camera at the left end of the furnace, the sample at the right end is tilted lower on the left and higher on the right. At this time, the operator rotates the knob counterclockwise. During the rotation of the knob, the reducer shaft of the rotary fine-tuning device is driven to rotate, 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, the flange is rotated. During the rotation of the flange, the sample tube body, the sample loading platform, the sample loading 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 body (i.e., the rotation adjustment accuracy of the sample tube) is improved, and finally the precise rotation adjustment of the sample tube is achieved. If the sample is observed from the right end of the furnace through the camera lens of the high-temperature physical property tester, it is tilted to the right lower and the left higher. The operator can adjust the horizontality of the sample by repeating the above opposite actions.

[0019] 3. Movement process of the sample delivery device: First, press the sample position forward key to enter the sample position forward automatic control mode 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 lead screw at 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 clamp the sample on the sample placement table, and places it in the upper center of the sample carrier from the sample placement port on the upper part of the insulation sleeve; then press the sample placement confirmation key, and then enter the test sample automatically controlled by the PLC control module to send the sample into the heat-saturating tube inside the furnace. Position. When the operator finds that the sample is dumped or crushed on the sample carrier after pressing the layout confirmation key, please press the layout exit key immediately. At this time, the automatic exit program is automatically controlled by the PLC control module. The sample will automatically drive the H-shaped moving block to move to the right on the slide rail through the rotation of the screw to the origin sample position. 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 layout confirmation key again. At this time, the PLC control module automatically controls to send the sample to the test sample position inside the heat equalizing 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 key to enter the automatic control of the PLC control module, and automatically move the sample tube to the origin position. The melting point and melting rate measurement of the entire sample is completed.

[0020] The X-axis adjustment slide is fixedly set at the upper position of the mobile sample feeding device, the Z-axis adjustment slide is fixedly set at the upper position of the X-axis adjustment slide, the tilt adjustment platform is fixedly set at the upper position of the Z-axis adjustment slide, and the turntable is fixedly set at the upper position of the tilt adjustment platform; the axial fine-tuning device is fixedly set at the upper position of the turntable. The main purpose of such a setting is to achieve the debugging and adjustment of the horizontal alignment of the sample on the sample-carrying tube and the equalizing pipe mouth in the furnace through the setting of the X-axis adjustment slide, the Z-axis adjustment slide, the tilt adjustment platform, the turntable and the axial fine-tuning device, under their joint action, so that the image of the melting point and melting speed of the sample under high temperature conditions cannot be horizontally reflected in the camera detection frame of the high-temperature physical property tester.

[0021] The layout confirmation key is fixedly set at the left end position of the side of the operating platform, the layout exit key is fixedly set at the right position of the layout confirmation key, the sample position forward key is fixedly set at the right position of the layout exit key, the sample position backward key is fixedly set at the right position of the sample position forward key, and the offline key is fixedly set at the right position of the sample position backward key; the layout confirmation key, the layout exit key, the sample position forward key, the sample position backward key and the offline key are fixedly connected to the PLC control module respectively, and are used to select different control programs of the PLC control module. The layout confirmation key, the layout exit key, the sample position forward key, the sample position backward key and the offline key are set mainly to select different control programs of the PLC control module. For example, when the offline key is pressed, the stepper motor is in an unlocked state through the control of the PLC control module. At this time, the operator can push the H-shaped moving block by hand to realize the movement of the sample tube on the slide rail, which is convenient for the operator to adjust the sample position on the sample tube and the alignment position with the equalizing pipe mouth in the furnace during installation and debugging.

[0022] The heat-insulating sleeve comprises a cylindrical body, which is fixedly arranged at the lower right side of the furnace, and the sample placement port is fixedly arranged at the upper center of the cylindrical body, and the sample placement port is a square opening. The main purpose of such arrangement is that, on the one hand, the heat-insulating sleeve can prevent the operator from being harmed by high temperature, thereby improving the safety of the experimental operation; on the other hand, at the sample placement position, the operator can mainly place the sample on the sample loading sheet on the upper part of the sample loading tube through the sample placement port to locate the sample placement position.

[0023] The slide rail is fixedly arranged at the upper position of the operating platform, and the slide rail is arranged symmetrically in front and 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 with the left position of the U-shaped plate through a thread hole, and the right end of the screw rod is fixedly connected with 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 sleeved 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; the main purpose of such arrangement is to set the distance from the origin sample position to the layout position in the PLC control module, and at the same time set the distance from the layout position to the sample measuring position. At the same time, the starting pulse frequency of the stepper motor is set to 0 through the PLC control module, and the acceleration rate and deceleration rate of the stepper motor are set to every 4 milliseconds / 1600 Hz. The rotation of the stepper motor drives the lead screw to rotate, thereby driving the H-shaped moving block under the rotation of the lead screw, and finally realizing the joint action of the X-axis adjustment slide, Z-axis adjustment slide, tilt adjustment platform, turntable, and axial fine-tuning device, so that the sample tube and the sample can be moved at a stable speed in different control modes, realizing precise positioning and movement of the origin sample position, layout position, and measurement position.

[0024] The photoelectric switch is fixedly arranged at the rear bottom position of the H-shaped moving block, and the two photoelectric switches are arranged in left-right symmetrical contact; the limit switch is fixedly arranged at the rear position of the slide rail near the left end, and the limit switch is fixedly arranged on the operating platform, and the limit switch and the slide rail are arranged horizontally front to back. Among them, the photoelectric switch arranged on the right side is used when the sample on the sample tube moves to the sample placement position, and the photoelectric switch senses the position signal of the sample placement position, and transmits the electrical signal to the PLC control module, and the electrical signal is transmitted to the PLC control module to automatically control the stop of the stepper motor, so that the sample on the sample tube automatically and smoothly stops at the sample placement position. Among them, the photoelectric switch arranged on the right side is used when the sample tube automatically returns to the origin sample position, the photoelectric switch senses the position signal of the origin sample position, and transmits the electrical signal to the PLC control module, and the electrical signal is transmitted to the PLC control module to automatically control the stop of the stepper motor, so that the sample tube automatically and smoothly stops at the origin sample position. The limit switch is set up. When the sample-carrying tube sends the sample to the predetermined measuring position in the equalizing tube in the furnace, the H-shaped moving block of the mobile sample feeding device contacts the limit switch. At this time, the limit switch senses the position signal and converts it into an electrical signal to transmit to the PLC control module. The PLC control module automatically controls the stepper motor to stop, thereby realizing precise control of the sample measuring position.

[0025] The sample tube is fixedly arranged at the front end of the sample tube fixing sleeve, and the sample tube fixing sleeve is fixedly connected to the front of the flange of the rotary fine-tuning device; the sample tube includes a sample tube body, a recessed step is fixedly arranged at the front end of the sample tube body, the recessed step is semicircular, the concave platform is fixedly arranged at the front end of the concave-convex step, the concave platform is a recessed square, the sample platform is fixedly placed at the upper position of the concave platform, the sample sheet is placed at the upper position of the sample platform, and the sample is fixedly placed at the middle position of the upper part of the sample sheet. The main purpose of setting the recessed step is: on the one hand, to prevent the sample tube body from blocking the sample background, and on the other hand, because the height of the recessed step is lower than the height of the sample tube, sufficient light exposure is provided for the sample background, so that the sample background becomes pure, the clarity of the sample image under the high-temperature melting state is improved, and finally the accuracy of the melting point and melting rate test of the sample is improved.

[0026] The planetary gear reducer is fixedly arranged inside the shell, and the flange is fixedly arranged at the rear end position of the shell for fixedly connecting the planetary gear reducer; the main purpose of such arrangement is to improve the rotation adjustment accuracy of the sample loading tube body (i.e., the sample loading tube) by utilizing the cooperation of the center gear, circumferential gear and outer gear ring of the planetary gear reducer.

[0027] The outer surface of the stainless steel ball is provided with a thread, and the stainless steel ball is screwed and fixed in the installation thread hole from the rear end of the knob, and the stainless steel ball is in tight contact with the back cover; the main purpose of this arrangement is to utilize the friction between the stainless steel ball and the back cover to play a damping role, on the one hand to prevent the knob from rotating due to vibration, on the other hand to fix the knob in place.

[0028] The planetary gear reducer is a commonly used equipment component in the prior art, which belongs to the category of the prior art and should be known to those skilled in the art. There is no need to elaborate on the structure and working principle of the planetary gear reducer. The planetary gear reducer used in the technical solution protected by this application is a planetary gear reducer with a diameter of 28 mm.

[0029] The sample-carrying tube is in the shape of a hollow cylinder, and a recessed step is fixedly arranged at the front end of the sample-carrying tube, and the recessed step is in the shape of a semicircle. The main purpose of such arrangement is: on the one hand, to prevent the sample-carrying tube body from blocking the sample background; on the other hand, since the height of the recessed step is lower than the height of the sample tube, sufficient light exposure is provided to the sample background, thereby making the sample background pure, improving the clarity of the sample image in the high-temperature melting state, and ultimately improving the accuracy of the test for determining the melting point and melting rate of the sample.

[0030] The concave platform is fixedly arranged at the front end position of the concave-convex step, and the concave platform is a concave square. The main purpose of such arrangement is to provide a fixed and firm placement platform for the sample loading platform through the arrangement of the concave platform.

[0031] The sample carrier is fixedly placed at the upper position of the concave platform, and the sample carrier includes a sample carrier body, which is a square body, and the bottom of the sample carrier body is symmetrically provided with limit convex strips, and the width of the limit convex strips is greater than the width of the concave step. The main purpose of such a setting is to set symmetrical limit convex strips at the bottom of the sample carrier body, so that the sample carrier can be firmly clamped on the concave platform, thereby improving the influence of the vibration of the high temperature physical property tester on the stable placement of the sample.

[0032] The size of the sample slide is smaller than that of the sample platform body. The upper surface of the sample platform body is a concave square. The sample is fixedly placed at the center of the concave square on the upper part of the sample platform body. The concave square on the upper part of the sample platform body is used to limit the position of the sample slide. The main purpose of this arrangement is to improve the stability of the placement of the sample slide, thereby improving the stability of the placement of the sample.

[0033] The thermocouple is arranged on the right side of the concave platform, the fixing card of the thermocouple is installed in the semicircular concave of the concave step, and the measuring end of the thermocouple for measuring the temperature extends to the bottom position of the concave platform; the main purpose of such arrangement is to detect the real-time temperature of the sample at the measuring point through the setting of the thermocouple.

[0034] The beneficial effects of the present invention are as follows: the present invention provides a sample feeding device for a high-temperature physical property tester, which has a simple design structure, is scientific and reasonable, is easy to operate, and has a high degree of automation; it realizes multi-directional sample position adjustment of the lateral position, longitudinal position, vertical position, inclined position, rotational position, and axial position of the sample on the sample carrier, improves the movement stability of the sample feeding process, and effectively prevents the sample from tipping over due to unstable sample feeding, thereby further crushing the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a front view of the present invention;

[0036] Figure 2 It is a structural schematic diagram of the mobile sample delivery device, the axial fine adjustment device, and the sample carrying tube of the present invention;

[0037] Figure 3 It is a front view of the axial fine-tuning device of the present invention;

[0038] Figure 4 It is an enlarged schematic diagram of the structure of the sample carrier of the present invention;

[0039] Markings in the figure: 1. Left bracket, 2. Right bracket, 3. Operating platform, 4. Furnace, 5. Sample placement table, 6. Control cabinet, 7. PLC control module, 8. Insulation sleeve, 801. Cylinder, 802. Sample placement port, 9. Mobile sample feeding device, 901. Slide rail, 902. Stepper motor fixing bracket, 903. Stepper motor, 904. Lead screw, 905. U-shaped plate, 906. H-shaped moving block, 907. Pad, 908. Photoelectric switch, 909. Limit switch, 10. X-axis adjustment slide, 11. Z-axis adjustment slide, 12. Tilt adjustment platform, 13. Turntable, 14. Axial fine-tuning device, 141. Base, 142. Shell, 143. Planetary gear reducer, 144. Flange, 145. Back cover, 146. Reducer shaft, 147. Knob, 148. Stainless steel ball, 149. Mounting thread hole, 15. Sample tube fixing sleeve, 151. Sleeve A, 152. Sleeve B, 16. Fixing thread hole, 17. Sample tube, 171. Sample tube body, 172. Recessed step, 173. Recessed platform, 174. Sample platform, 1741. Sample platform body, 1742. Limiting convex strip, 175. Sample loading piece, 176. Sample, 18. Thermocouple, 19. Stakeout confirmation key, 20. Stakeout exit key, 21. Sample position forward key, 22. Sample position backward key, 23. Offline key. DETAILED DESCRIPTION

[0040] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0041] As shown in the figure, a sample delivery device for a high-temperature physical property tester comprises a left bracket 1, a right bracket 2, an operating platform 3, a furnace 4, and a sample placement table 5; the left bracket 1 is fixedly arranged at the left side position of the right bracket 2, and the operating platform 3 is fixedly arranged at the upper position of the left bracket 1 and the right bracket 2; the furnace 4 is fixedly arranged near the left side position of the operating platform 3, and the sample placement table 5 is fixedly arranged at the lower right side position of the furnace 4; the control cabinet 6 is fixedly arranged at the middle position of the left support frame 1, and the PLC control module 7 is fixedly arranged at the middle position of the control cabinet 6, which is used to automatically control the left and right automatic movement of the mobile sample delivery device 9; the heat insulation sleeve 8 is fixedly arranged at the lower right side position of the furnace 4, and the mobile sample delivery device 9 is fixedly arranged at the upper right side position of the operating platform 5; the X-axis adjustment slide 10 is fixedly arranged at the upper position of the mobile sample delivery device 9, the Z-axis adjustment slide 11 is fixedly arranged at the upper position of the X-axis adjustment slide 10, the tilt adjustment platform 12 is fixedly arranged at the upper position of the Z-axis adjustment slide 11, and the turntable 13 is fixedly arranged at the upper part of the tilt adjustment platform 12 The axial fine-tuning device 14 is fixedly arranged at the upper position of the turntable 13; the sample-carrying tube fixing sleeve 15 is fixedly arranged at the left end position of the axial fine-tuning device 14, and the fixing wire holes 16 are arranged in a straight line and at equal intervals at the upper position of the sample-carrying tube fixing sleeve 15; the sample-carrying tube 17 is fixedly arranged at the left end position of the sample-carrying tube fixing sleeve 15, and the thermocouple 18 is fixedly arranged at the left end position of the sample-carrying tube 17, which is used to measure the temperature of the left end of the sample-carrying tube 17 in the furnace 4; the sample determination key 19 is fixedly arranged at the left end position of the side of the operating platform 3 The layout exit key 20 is fixedly set on the right side of the layout confirmation key 19, the sample position forward key 21 is fixedly set on the right side of the layout exit key 20, the sample position backward key 22 is fixedly set on the right side of the sample position forward key 21, and the offline key 23 is fixedly set on the right side of the sample position backward key 22; the layout confirmation key 19, the layout exit key 20, the sample position forward key 21, the sample position backward key 22 and the offline key 23 are respectively fixedly connected to the PLC control module 7, and are used to select different control programs of the PLC control module 7.

[0042] The heat insulation sleeve 8 includes a cylindrical body 801 , which is fixedly disposed at the lower right side of the furnace 4 , and a lofting opening 802 is fixedly disposed at the upper center of the cylindrical body 801 , and the lofting opening 802 is a square opening.

[0043] The mobile sample feeding device 9 includes a slide rail 901, which is fixedly arranged at the upper position of the operating platform 3, and the slide rail 901 is symmetrically arranged front and back; the stepper motor fixing frame 902 is fixedly arranged at the right end position of the slide rail 901, and the stepper motor 903 is fixedly arranged at the inner position of the stepper motor fixing frame 902, and the lead screw 904 passes through the left and right ends of the U-shaped plate 905 and the middle position of the H-shaped moving block 906, and the left end of the lead screw 904 is connected and fixed to the left position of the U-shaped plate 905 through a thread hole, and the right end of the lead screw 904 is fixedly connected to the power output shaft of the stepper motor 903; the U-shaped plate 905 is fixedly arranged on the slide rail 901 The upper position of the H-shaped moving block 906, the pad 907 is fixedly set at the upper position of the H-shaped moving block 906, the bottom of the H-shaped moving block 906 is mounted on the slide rail 901, the upper part of the H-shaped moving block 906 extends to the upper position of the pad 907, and the connecting plate in the middle of the H-shaped moving block 906 is lower than the position of the pad 907; the photoelectric switch 908 is fixedly set at the rear bottom position of the H-shaped moving block 906, and the two photoelectric switches 908 are symmetrically contacted; the limit switch 909 is fixedly set at the rear side position of the slide rail 901 near the left end, and the limit switch 909 is fixedly set on the operating platform, and the limit switch 909 and the slide rail are horizontally set front to back.

[0044] The photoelectric switch 908 is used to sense the position signals of the sample measuring position and the origin sample position, and the limit switch 909 is used to sense the maximum moving position of the sample rod; the photoelectric switch 908 and the limit switch 909 are fixedly connected to the PLC control module 7 through wires.

[0045] The X-axis adjustment slide 10 is fixedly arranged on the upper position of the pad 907 of the mobile sample feeding device 9. By rotating the adjustment nut of the X-axis adjustment slide 10, it is used to adjust the lateral left and right sliding position of the sample tube 17; by rotating the adjustment nut of the Z-axis adjustment slide 11, it is used to adjust the vertical up and down position of the sample tube 17; by rotating the adjustment nut of the tilt adjustment platform 12, it is used to adjust the up and down tilt angle of the sample tube 17; by opening or closing the locking nut of the turntable 13, it is used to adjust the rotation angle of the sample tube.

[0046] The axial fine-tuning device 14 includes a base 141, which is fixedly arranged at the bottom position of a shell 142. The shell 142 is in an arc shape. The planetary gear reducer 143 is fixedly arranged inside the shell 142. The flange 144 is fixedly arranged at the rear end position of the shell 142. The flange 144 is fixedly connected to the outer gear ring of the planetary gear reducer for fixedly connecting the planetary gear reducer 143. The front end of the reducer shaft 146 is fixedly connected to the central gear of the planetary gear reducer 143, and the rear end of the reducer shaft 146 extends to the rear end of the shell 142 and is fixedly connected to the knob 147 through the rear cover 145. The stainless steel bead 148 is fixedly arranged at the bottom position of the knob 147, and the mounting thread hole 149 is opened at the bottom position of the knob 147. The outer surface of the stainless steel bead 148 is provided with a thread. The stainless steel bead 148 is tightened and fixed in the mounting thread hole 149 from the rear end of the knob 147, and the stainless steel bead 148 is in tight contact with the rear cover 145.

[0047] The sample-carrying tube fixing sleeve 15 includes a sleeve A151, which is inserted into a sleeve B152. The diameter of the sleeve A151 is smaller than the diameter of the sleeve B152. The fixing thread hole 16 is a through hole passing through the sleeve A151 and the sleeve B152. The sleeve A151 can be telescopically moved in the sleeve B152. The sample-carrying tube body 171, the sleeve A151 and the sleeve B152 are tightened and fixed by screws.

[0048] The sample-carrying tube 17 includes a sample-carrying tube body 171, a recessed step 172 fixedly arranged at the front end position of the sample-carrying tube body 171, the recessed step 172 is semicircular, a recessed platform 173 is fixedly arranged at the front end position of the concave-convex step 172, the recessed platform 173 is a recessed square, a sample-carrying platform 174 is fixedly placed at the upper position of the recessed platform 173, a sample-carrying plate 175 is placed at the upper position of the sample-carrying plate 174, and the sample 176 is placed at the upper center position of the sample-carrying plate 175; the sample-carrying tube body 171 is sleeved in the sleeve A151, and the sleeve B152 is fixedly connected to the front end center position of the flange 144.

[0049] The sample carrier 174 includes a sample carrier body 1741 . The sample carrier body 1741 is a cube. The bottom of the sample carrier body 1741 is symmetrically provided with limiting convex strips 1742 . The width of the limiting convex strips 1742 is greater than the width of the recessed step 172 .

[0050] The thermocouple 18 is disposed on the right side of the concave platform 173 . The thermocouple 18 is fixed in the semicircular concave of the concave step 172 . The temperature measuring end of the thermocouple 18 extends to the bottom of the concave platform 173 .

[0051] The use process of the sample delivery device of the high temperature physical property tester is as follows:

[0052] 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, and set the distance from the sample placement position to the sample measurement position in the PLC control module 7. 2. Set the starting pulse frequency of the control stepper motor 903 to 0 through the PLC control module 7, and set the acceleration rate and deceleration rate of the stepper motor 903 to every 4 milliseconds / 1600 Hz.

[0053] 2. Sample (micro-adjustment of the position of the sample tube): First, the operator presses the offline key 23 to unlock the stepper motor 903. Then, the operator pushes the H-shaped moving block 906 of the sample feeding device 9 to move the sample tube 17 into the heat insulation sleeve 8 and close to the outlet of the heat equalizing tube inside the furnace 4. At this time, the operator first clamps the limiting convex strip 1742 of the sample loading platform 174 on the concave platform 173, and places the sample plate 175 at the center of the sample loading platform 174. Then, the operator uses tweezers to clamp the sample from the sample placement platform 5 and places it at the center of the sample plate 175. By adjusting the slide 10 on the X-axis The nut is used to fine-tune the front and rear position of the sample tube, so that the sample platform 174 and the equal-distance position of the equal-heat pipe mouth inside the furnace 4 are reserved in front and behind. Then, the nut of the Z-axis adjustment slide 11 is used to fine-tune the upper and lower positions of the sample platform 174 at the equal-heat pipe mouth inside the furnace 4, so that the sample image can be fully displayed when observed by the camera. At this time, if the sample is tilted front and back, the nut of the tilt adjustment platform 12 can be fine-tuned to make the sample in a vertical state. If the sample is in a vertical state, but is slightly offset to the left or right, the nut of the turntable 13 can be fine-tuned to fine-tune the rotation angle of the sample so that the sample can be placed vertically. When observing through the camera at the left end of the furnace 4 that the sample at the right end is tilted with the left lower and the right higher, the operator rotates the knob 147 counterclockwise. During the rotation, the knob 147 drives the reducer shaft 146 of the rotary fine-tuning device 14 to rotate. During the rotation of the reducer shaft 146, the planetary gear reducer 143 is driven to rotate. The central gear of the planetary gear reducer 143 drives the circumferential gear to rotate, and at the same time drives the outer gear ring of the planetary gear reducer 143 to rotate, and at the same time makes the flange 144 rotate. During the rotation, the flange 144 drives the sample tube body 1741 , the sample stage 174, the sample plate 175 and the sample 176 rotate counterclockwise, and finally adjust the sample 176 to a horizontal state; during the rotation of the knob 147, the stainless steel bead 148 is in a tight contact state with the back cover 145. At this time, the friction between the stainless steel bead 148 and the back cover 145 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 143, the rotation adjustment accuracy of the sample tube body 1741 (i.e., the sample tube 17) is improved, and finally the precise rotation adjustment of the sample tube 17 is achieved. If the sample 106 is observed from the right end of the furnace 4 through the camera lens of the high-temperature physical property tester, and the tilt is lower on the right and higher on the left, the operator can repeat the above-mentioned opposite actions to achieve the adjustment of the horizontality of the sample 176.

[0054] 3. Movement process of the sample delivery device: First, press the sample position forward key 21 to enter the sample position forward automatic control mode controlled by the PLC control module 7. At this time, the PLC control module 7 controls the stepper motor 903 of the mobile sample delivery device 9 to start with a pulse frequency of 0, and drives the H-shaped moving block 906 to move to the left on the slide rail 901 through the lead screw 904 at an acceleration rate of 4 milliseconds / 1600 Hz. When the stepper motor 903 accelerates to the set maximum value of the pulse frequency, it runs smoothly and runs for a distance. After that, it reaches the preset distance of the sample placement position at the same deceleration rate of 4 milliseconds / 1600 Hz. At this time, the pulse frequency of the stepper motor 903 is 0, and it stops at the sample placement position. Then the operator uses tweezers to grab the sample 176 on the sample placement table 5, and places it at the upper center position of the sample carrier 175 from the sample placement port 802 on the upper part of the insulation sleeve 8; then press the sample placement confirmation key 19, and then enter the automatic control of the PLC control module 7 to send the sample to the test sample position inside the heat-saturating pipe inside the furnace 4. When After pressing the layout confirmation key 19, if the operator finds that the sample 176 is dumped or crushed on the sample carrier 175, please immediately press the layout exit key 20, and then enter the automatic exit program automatically controlled by the PLC control module 7. The sample 176 will automatically drive the H-shaped moving block 906 to move to the right on the slide rail 901 through the rotation of the screw 904. The origin sample position, at this time, the photoelectric switch 908 detects the signal of reaching the origin sample position and transmits it to the PLC control module 7. The PLC control module 7 automatically controls to stop, and finally the dumped or crushed sample is cleaned up; then repeat the above operation to place the sample, press the layout confirmation key 19 again, and then enter the automatic control by the PLC control module 7, and send the sample to the test sample position inside the heat equalizing tube inside the furnace 4 to measure the melting point and melting rate of the sample 176. When the measurement is completed, press the sample position back key 22, and enter the automatic control by the PLC control module 7, and automatically move the sample carrier tube 17 to the origin position. The melting point and melting rate measurement of the entire sample 176 is completed.

[0055] Various modifications to the above embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sample delivery device for a high-temperature physical property tester, comprising a left bracket, a right bracket, an operating platform, a furnace, and a sample placement table; the left bracket is fixedly arranged at the left side of the right bracket, the operating platform is fixedly arranged at the upper position of the left bracket and the right bracket; the furnace is fixedly arranged near the left side of the operating platform, and the sample placement table is fixedly arranged at the lower right side of the furnace; characterized in that: The control cabinet is fixedly arranged in the middle position of the left support frame, and the PLC control module is fixedly arranged in the middle position of the control cabinet, which is used to automatically control the left and right automatic movement of the mobile sample delivery device; the heat insulation sleeve is fixedly arranged in the lower right position of the furnace, and the mobile sample delivery device is fixedly arranged in the upper right position of the operating platform, and the mobile sample delivery device includes a slide rail, and the slide rail is fixedly arranged in the upper position of the operating platform, and the slide rail is symmetrically arranged front and back; the stepper motor fixing frame is fixedly arranged at the right end position of the slide rail, and the stepper motor is fixedly arranged in the inner position of the stepper motor fixing frame, and the lead screw 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 lead screw is connected and fixed to the left side of the U-shaped plate through a thread hole, and the right end of the lead screw is connected to the power output shaft of the stepper motor. Fixed connection; the U-shaped plate is fixedly set at the upper position of the slide rail, the pad is fixedly set 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; the photoelectric switch is fixedly set at the rear bottom position of the H-shaped moving block, and the two photoelectric switches are symmetrically contacted; the limit switch is fixedly set at the rear position of the slide rail near the left end, the limit switch is fixedly set on the operating platform, and the limit switch and the slide rail are horizontally set front and back; the X-axis adjustment slide is fixedly set at the upper position of the mobile sample feeding device, the Z-axis adjustment slide is fixedly set at the upper position of the X-axis adjustment slide, and the tilt adjustment platform is fixedly set at the upper part of the Z-axis adjustment slide The position of the turntable is fixedly arranged at the upper position of the tilt adjustment platform; the axial fine-tuning device is fixedly arranged at the upper position of the turntable, the axial fine-tuning device includes a base, the base 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 central gear of the planetary gear reducer, the rear end of the reducer shaft extends to the rear end of the shell, and is fixedly connected to the knob through the back cover; the stainless steel wave ball 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 wave ball is provided with a thread, and the stainless steel The steel ball is tightened and fixed in the installation thread hole from the rear end of the knob, and the stainless steel ball is in tight contact with the back cover; the sample tube fixing sleeve is fixedly set at the left end position of the axial fine-tuning device, and the fixing thread holes are arranged in a straight line with equal spacing at the upper position of the sample tube fixing sleeve; the sample tube is fixedly set at the left end position of the sample tube fixing sleeve, and the thermocouple is fixedly set at the left end position of the sample tube, which is used to measure the temperature of the left end of the sample tube in the furnace; the layout confirmation key is fixedly set at the left end position of the side of the operating platform, the layout exit key is fixedly set at the right position of the layout confirmation key, the sample position forward key is fixedly set at the right position of the layout exit key, the sample position backward key is fixedly set at the right position of the sample position forward key, and the offline key is fixedly set at the right position of the sample position backward key;The layout confirmation key, layout exit key, sample position forward key, sample position backward key and offline key are respectively fixedly connected to the PLC control module and are used to select different control programs of the PLC control module. ; 2. The sample delivery device for a high temperature physical property measuring instrument according to claim 1, characterized in that: The heat-insulating sleeve comprises a cylinder, which is fixedly arranged at the lower right side of the furnace and connected thereto, and a lofting opening is fixedly arranged at the upper center of the cylinder, and the lofting opening is a square opening.

3. The sample delivery device for a high temperature physical property measuring instrument according to claim 1, characterized in that: The photoelectric switch is used to sense the position signals of the sample measuring position and the origin sample position, and the limit switch is used to sense the maximum moving position of the sample rod; the photoelectric switch and the limit switch are fixedly connected to the PLC control module through wires.

4. The sample delivery device for a high temperature physical property measuring instrument according to claim 1, characterized in that: The X-axis adjustment slide is fixedly arranged on the upper position of the pad of the mobile sample feeding device. By rotating the adjustment nut of the X-axis adjustment slide, it is used to adjust the lateral left and right sliding position of the sample tube; by rotating the adjustment nut of the Z-axis adjustment slide, it is used to adjust the vertical up and down position of the sample tube; by rotating the adjustment nut of the tilt adjustment platform, it is used to adjust the up and down tilt angle of the sample tube; by opening or closing the locking nut of the turntable, it is used to adjust the rotation angle of the sample tube.

5. The sample delivery device for a high temperature physical property measuring instrument according to claim 1, characterized in that: The sample-carrying tube fixing sleeve includes a sleeve A, which is inserted into a sleeve B. The diameter of sleeve A is smaller than the diameter of sleeve B. The fixing thread hole is a through hole passing through sleeve A and sleeve B. Sleeve A can be telescopically moved in sleeve B. The sample-carrying tube body, sleeve A and sleeve B are tightened and fixed by screws.

6. The sample delivery device for a high temperature physical property tester according to claim 1, characterized in that: The sample-loading tube includes a sample-loading tube body, a recessed step fixedly arranged at the front end position of the sample-loading tube body, the recessed step is semicircular, the concave platform is fixedly arranged at the front end position of the concave-convex step, the concave platform is a recessed square, the sample loading platform is fixedly placed at the upper position of the concave platform, the sample loading plate is placed at the upper position of the sample loading plate, and the sample is placed at the upper center position of the sample loading plate; the sample-loading tube body is sleeved in sleeve A, and sleeve B is fixedly connected to the front end center position of the flange.

7. The sample delivery device for a high temperature physical property tester according to claim 1, characterized in that: The sample loading platform comprises a sample loading platform body, which is a cube. The bottom of the sample loading platform body is symmetrically provided with limit convex strips, and the width of the limit convex strips is greater than the width of the recessed step.

8. The sample delivery device for a high temperature physical property tester according to claim 1, characterized in that: The thermocouple is arranged at the right side of the concave platform, the fixing card of the thermocouple is installed in the semicircular concave of the concave step, and the measuring end of the thermocouple for measuring the temperature extends to the bottom position of the concave platform.

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