Ultrahigh-temperature thermal expansion coefficient tester

Abstract

The utility model discloses an ultrahigh-temperature thermal expansion coefficient tester, which relates to the technical field of detection equipment and comprises an equipment platform, a guide rail, a fixed side and a movable side. The guide rail is arranged on the equipment platform, the fixed side is arranged on one side of the equipment platform, and the movable side is arranged on the guide rail in a sliding mode. The fixed side comprises a displacement detection module and a bearing support; one end of the bearing support is connected with the detection end of the displacement detection module; the moving side comprises an induction heating furnace and a temperature detection module; an insertion opening is formed in the side, facing the fixed side, of the induction heating furnace, and the bearing support enters the induction heating furnace through the insertion opening. According to the utility model, the measured material is heated in an induction heating manner, so that the heat loss is greatly reduced, the energy consumption ratio of the equipment is reduced, and meanwhile, the limiting temperature of the thermal expansion coefficient tester is improved. The insulating layer can reduce heat loss, improve the heating efficiency, reduce the temperature gradient in the sample and improve the test precision. And the temperature change condition is directly measured through the infrared thermometer, so that the measurement is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to an ultra-high temperature thermal expansion coefficient tester. Background Technology

[0002] A thermal expansion coefficient tester is used to measure the dimensional changes of a substance under temperature variations. By detecting the changes in the length of a sample during heating or cooling, the thermal expansion coefficient of the substance under different temperature conditions can be measured, which is of great significance for studying material properties and engineering applications.

[0003] Patent CN116735651A discloses a thermal expansion coefficient tester, relating to the field of testing equipment. The technical solution includes a detection unit mounted on a frame, comprising a sensor; a sample placement unit located below the detection unit; a heating unit for heating the sample; and a lifting mechanism linked to the heating unit. When the heating unit is in a high position, the sample on the sample support frame is located inside the heating area of ​​the heating unit; when the heating unit is in a low position, the sample on the sample support frame is located outside the heating unit. The beneficial effect of this invention is that it employs a liftable heating unit structure, and neither the sample placement unit nor the detection unit is connected to the heating unit; both are fixed to the frame. This provides a more stable setting for the sample placement unit and the detection unit, and the adjustment of their relative positions is not affected by other components, thus enabling a more ideal and precise placement of the sample and sensor to improve the accuracy of the measurement results.

[0004] Existing thermal expansion coefficient testers typically use resistance heating. Because resistance heating requires the introduction of electrodes, it generates significant heat loss at the electrode introduction points, resulting in high energy consumption and high power consumption. Furthermore, the large heat loss from resistance heating leads to a lower upper temperature limit for traditional thermal expansion coefficient testers. Summary of the Invention

[0005] To solve the above technical problems, this utility model provides an ultra-high temperature thermal expansion coefficient tester, which greatly reduces heat loss and lowers the energy consumption ratio of the equipment by means of induction heating, while increasing the limit temperature of the thermal expansion coefficient tester.

[0006] To achieve the above objectives, this utility model provides the following solution:

[0007] This invention provides an ultra-high temperature thermal expansion coefficient tester, comprising an equipment platform, a guide rail, a fixed side, and a movable side; the guide rail is disposed on the equipment platform, the fixed side is disposed on one side of the equipment platform, and the movable side is slidably disposed on the guide rail; the fixed side includes a displacement detection module and a support bracket; one end of the support bracket is connected to the detection end of the displacement detection module; the movable side includes an induction heating furnace and a temperature detection module; the induction heating furnace has an insertion port on the side facing the fixed side, and the support bracket enters the induction heating furnace through the insertion port; the temperature detection module is used to detect the temperature of the material to be measured inside the induction heating furnace.

[0008] Optionally, a movable base is provided at the bottom of the movable side, the movable base is slidably connected to the guide rail, and the induction heating furnace is disposed on the movable base.

[0009] Optionally, the induction heating furnace includes a water-cooled furnace cover, an insulation layer, a quartz tube, an induction heating coil, and an induction heating element; a water-cooled furnace cover is respectively provided at both ends of the quartz tube, the induction heating element is provided at the center of the quartz tube, and the insulation layer is provided between the induction heating element and the inner wall of the quartz tube; the induction heating coil is provided on the outside of the quartz tube; and the insertion port is provided in the middle of the water-cooled furnace cover facing the fixed side.

[0010] Optionally, a temperature measuring hole is provided in the middle of the water-cooled furnace cover away from the fixed side, and a quartz glass is provided inside the temperature measuring hole, with the temperature detection module located on the outside of the quartz glass.

[0011] Optionally, a magnetic shielding cover is provided between the tops of the water-cooled furnace covers on both sides.

[0012] Optionally, the support bracket is a graphite bracket.

[0013] Optionally, a push rod is provided through the bearing support, one end of which is connected to the detection end of the displacement detection module, and the other end of which is connected to the material being measured.

[0014] Optionally, the induction heating furnace has a gas inlet on one side and a gas outlet on the other side. The gas inlet is connected to an inert gas source, and the gas outlet is connected to a vacuum pump, FTIR, or QMS.

[0015] Optionally, two push rods are arranged through the support tray. The support tray is provided with measuring material and standard sample. The displacement detection module includes two displacement sensors. One end of one push rod is connected to one displacement sensor, the other end of one push rod is connected to the measuring material, one end of the other push rod is connected to the other displacement sensor, and the other end of the other push rod is connected to the standard sample.

[0016] Optionally, the temperature detection module includes an infrared thermometer.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] The ultra-high temperature thermal expansion coefficient tester of this invention heats the material to be measured through induction heating, greatly reducing heat loss and lowering the energy efficiency of the equipment. It also increases the extreme temperature limit of the thermal expansion coefficient tester, allowing it to be used to measure the expansion coefficient of substances at higher temperatures (3000℃). By incorporating an insulation layer, heat loss is effectively reduced, heating efficiency is improved, the internal temperature gradient of the sample is minimized, and the accuracy of the thermal expansion coefficient test is enhanced. Furthermore, an infrared thermometer allows for direct measurement of temperature changes in the material, resulting in more accurate measurements.

[0019] During testing, the instrument can be purged with inert gas via the left side. Commonly used gases include N2, Ar, and He to protect materials inside the furnace from oxidation at high temperatures. It can also be used to remove gaseous products during heating, preventing contamination of the furnace cavity by gases produced during sample decomposition. Specific gases can also be introduced to measure the coefficient of thermal expansion of materials in a specific gaseous environment.

[0020] The gas outlet is connected to the pump, allowing the entire system to operate under vacuum or certain pressure conditions. It can also be further connected to FTIR, QMS, and other systems via a transfer tube to deliver the product gas to these instruments for component analysis. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top view schematic diagram of the ultra-high temperature thermal expansion coefficient tester of this utility model;

[0023] Figure 2This is a schematic diagram of the AA cross-sectional structure of the ultra-high temperature thermal expansion coefficient tester of this utility model in the closed state;

[0024] Figure 3 This is a schematic diagram of the open state structure of the ultra-high temperature thermal expansion coefficient tester of this utility model;

[0025] Figure 4 This is a schematic diagram of the differential structure in the ultra-high temperature thermal expansion coefficient tester of this utility model;

[0026] Figure 5 This is a cross-sectional schematic diagram of the differential structure in the ultra-high temperature thermal expansion coefficient tester of this utility model.

[0027] Explanation of reference numerals in the attached diagram: 1. Gas inlet; 2. Gas outlet; 3. Moving side; 4. Guide rail; 5. Fixed side; 6. Water-cooled furnace cover; 7. Quick-connect interface; 8. Displacement detection module; 9. Graphite support; 10. Measuring material; 11. Insulation layer; 12. Quartz tube; 13. Induction heating coil; 14. Magnetic shielding cover; 15. Quartz glass; 16. Infrared thermometer; 17. Induction heating element; 18. Moving base; 19. Equipment platform; 20. Standard sample; 21. Push rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1:

[0030] like Figures 1 to 3 As shown, this embodiment provides an ultra-high temperature thermal expansion coefficient tester, including an equipment platform 19, a guide rail 4, a fixed side 5, and a movable side 3; the guide rail 4 is disposed on the equipment platform 19, the fixed side 5 is disposed on one side of the equipment platform 19, and the movable side 3 is slidably disposed on the guide rail 4; the fixed side 5 includes a displacement detection module 8 and a support bracket; one end of the support bracket is connected to the detection end of the displacement detection module 8; the movable side 3 includes an induction heating furnace and a temperature detection module; the induction heating furnace has an insertion port on the side facing the fixed side 5, and the support bracket enters the induction heating furnace through the insertion port; the temperature detection module is used to detect the temperature of the measured material 10 inside the induction heating furnace.

[0031] In this specific embodiment, the temperature detection module includes an infrared thermometer 16 for measuring temperature changes in the material 10. The displacement detection module 8 includes a displacement sensor for detecting length changes in the material.

[0032] A movable base 18 is provided at the bottom of the movable side 3. The movable base 18 is slidably connected to the guide rail 4, and the induction heating furnace is set on the movable base 18. The furnace can be opened / closed by pushing and pulling the movable base 18 in a horizontal sliding manner, which facilitates material loading and unloading.

[0033] The insertion port is equipped with a quick-connect interface 7 to facilitate quick connection between the fixed side 5 and the movable side 3.

[0034] The induction heating furnace includes a water-cooled furnace cover 6, an insulation layer 11, a quartz tube 12, an induction heating coil 13, and an induction heating element 17. A water-cooled furnace cover 6 is located at each end of the quartz tube 12. The induction heating element 17 is positioned at the center of the quartz tube 12, and an insulation layer 11 is provided between the induction heating element 17 and the inner wall of the quartz tube 12. The induction heating coil 13 is located on the outside of the quartz tube 12. An insertion port is provided in the middle of the water-cooled furnace cover 6 facing the fixed side 5. Using the quartz tube 12 as the furnace body avoids interference with the magnetic field, and the furnace body is completely sealed using sealing components. The alternating magnetic field of the induction heating coil 13 heats the induction heating element 17, resulting in high thermal efficiency and rapid heating. The induction heating element 17, influenced by the magnetic field of the induction heating coil 13, heats the measured material 10.

[0035] A temperature measuring hole is provided in the middle of the water-cooled furnace cover 6 away from the fixed side 5. A quartz glass 15 is installed inside the temperature measuring hole, and the temperature detection module is located on the outside of the quartz glass 15.

[0036] A magnetic shielding cover 14 is provided between the tops of the water-cooled furnace covers 6 on both sides. The magnetic shielding cover 14 can shield the magnetic field generated by the induction heating coil 13 and prevent it from affecting the external environment.

[0037] The support is a graphite support 9.

[0038] A push rod 21 is installed through the support. One end of the push rod 21 is connected to the detection end of the displacement detection module 8, and the other end of the push rod 21 is connected to the measuring material 10.

[0039] A gas inlet 1 is provided on one side of the induction heating furnace, and a gas outlet 2 is provided on the other side. The gas inlet 1 is connected to an inert gas source, and the gas outlet 2 is connected to a vacuum pump, FTIR, or QMS.

[0040] Under certain requirements, a suitable interface can be used to connect to an FTIR / QMS. The specified gas enters from the inlet of the thermal expansion analyzer, reacts with the sample at high temperature, or carries away some of the vaporized sample before entering the FTIR / QMS. At this time, the FTIR / QMS can determine the reaction products of the sample with the specified gas at high temperature, or the volatile components of the sample at high temperature, allowing for more data acquisition of the sample.

[0041] Example 2:

[0042] like Figure 4 and 5 As shown, this embodiment is an improved embodiment based on embodiment one. In this embodiment, two push rods 21 are arranged through the support tray. The support tray is provided with measuring material 10 and standard sample 20. The displacement detection module 8 includes two displacement sensors. One end of one push rod 21 is connected to one displacement sensor, the other end of one push rod 21 is connected to the measuring material 10, one end of the other push rod 21 is connected to another displacement sensor, and the other end of the other push rod 21 is connected to the standard sample 20.

[0043] The standard sample 20 and the measuring material 10 are placed on the graphite holder 9 at the same time. The temperature is raised by the induction heating element 17, and the infrared thermometer 16 measures the temperature change. Since there is a quartz glass 15 as a baffle on the left, the expansion of the measuring material 10 during the expansion process extends to the right. The displacement sensor can measure the length change value at this time.

[0044] Assuming the lengths of both the standard sample 20 and the measured sample are X, the temperature rise is ΔT, the known coefficient of thermal expansion of the standard sample 20 is k1, the length change measured by the displacement sensor on the side of the standard sample 20 is L1, and the length change measured by the displacement sensor on the side of the measured sample is L2, then the coefficient of thermal expansion k of the test sample can be calculated as follows:

[0045]

[0046] By simultaneously measuring two samples, the system can suppress some common-mode interferences, such as equipment drift and temperature fluctuations, which helps improve the sensitivity and accuracy of the measurement. This enhances the measurement system's anti-interference capability and improves the instrument's stability.

[0047] Furthermore, due to the comparative testing, subtle differences between samples can be detected, making the comparison of the expansion properties of substances more intuitive.

[0048] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] This specification uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high-temperature thermal expansion coefficient tester, characterized in that, The device includes a platform, a guide rail, a fixed side, and a movable side. The guide rail is mounted on the platform, the fixed side is located on one side of the platform, and the movable side is slidably mounted on the guide rail. The fixed side includes a displacement detection module and a support bracket. One end of the support bracket is connected to the detection end of the displacement detection module. The movable side includes an induction heating furnace and a temperature detection module. The induction heating furnace has an insertion port on its side facing the fixed side, through which the support bracket enters the induction heating furnace. The temperature detection module is used to detect the temperature of the material being measured inside the induction heating furnace.

2. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that, A movable base is provided at the bottom of the movable side, and the movable base is slidably connected to the guide rail. The induction heating furnace is disposed on the movable base.

3. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that, The induction heating furnace includes a water-cooled furnace cover, an insulation layer, a quartz tube, an induction heating coil, and an induction heating element. A water-cooled furnace cover is located at each end of the quartz tube. The induction heating element is located at the center of the quartz tube, and the insulation layer is provided between the induction heating element and the inner wall of the quartz tube. The induction heating coil is located on the outside of the quartz tube. An insertion port is located in the middle of the water-cooled furnace cover facing the fixed side.

4. The ultra-high temperature thermal expansion coefficient tester according to claim 3, characterized in that, A temperature measuring hole is provided in the middle of the water-cooled furnace cover away from the fixed side. A quartz glass is provided inside the temperature measuring hole, and the temperature detection module is located on the outside of the quartz glass.

5. The ultra-high temperature thermal expansion coefficient tester according to claim 3, characterized in that, A magnetic shielding cover is provided between the tops of the water-cooled furnace covers on both sides.

6. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that, The support is a graphite support.

7. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that, A push rod is installed through the bearing support. One end of the push rod is connected to the detection end of the displacement detection module, and the other end of the push rod is connected to the material being measured.

8. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that, The induction heating furnace has a gas inlet on one side and a gas outlet on the other side. The gas inlet is connected to an inert gas source, and the gas outlet is connected to a vacuum pump, FTIR, or QMS.

9. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that, Two push rods are arranged through the support tray. The support tray is provided with measuring material and standard sample. The displacement detection module includes two displacement sensors. One end of one push rod is connected to one displacement sensor, the other end of one push rod is connected to the measuring material, one end of the other push rod is connected to the other displacement sensor, and the other end of the other push rod is connected to the standard sample.

10. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that, The temperature detection module includes an infrared thermometer.

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