Ultrahigh-temperature thermal expansion coefficient tester

Abstract

The invention 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 invention, 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 increased. 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] The invention relates to the technical field of detection equipment, in particular to an ultra-high temperature thermal expansion coefficient tester. Background Art

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

[0003] The patent with publication number CN116735651A discloses a thermal expansion coefficient tester, which relates to the field of detection equipment. The technical solution is as follows: a detection part is arranged on a frame, and the detection part includes a sensor; a sample placement part is located below the detection part; a heating unit is used to heat the sample; a lifting mechanism is linked with the heating unit; when the heating unit is located at a high position, the sample on the sample carrier is located inside the heating area of ​​the heating unit; when the heating unit is located at a low position, the sample on the sample carrier is located outside the heating unit. The beneficial effect of the present invention is that the present solution adopts a liftable heating unit structure, and the sample placement part and the detection part are not connected to the heating unit, and both are fixed on the frame. This can provide a more stable setting position for the sample placement part and the detection part, and the adjustment of the relative position of the two can also be free from interference from other components, so that the sample and the sensor can be placed in a more ideal and precise manner to improve the accuracy of the measurement results.

[0004] Existing thermal expansion coefficient testers usually use a resistance heating mode. Since resistance heating is used, an electrode introduction needs to be configured. Resistance heating will produce a large heat loss at the electrode introduction point. The equipment has a high energy consumption ratio and consumes a lot of electricity. Due to the large heat loss caused by resistance heating, the temperature upper limit of the traditional thermal expansion coefficient tester is low. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an ultra-high temperature thermal expansion coefficient tester, which greatly reduces heat loss through induction heating, reduces the energy consumption ratio of the equipment, and increases the limit temperature of the thermal expansion coefficient tester.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present 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 arranged on the equipment platform, the fixed side is arranged on one side of the equipment platform, and the movable side is slidably arranged on the guide rail; the fixed side comprises a displacement detection module and a bearing support; one end of the bearing support is connected to the detection end of the displacement detection module; the movable side comprises an induction heating furnace and a temperature detection module; the induction heating furnace is provided with an insertion port on one side facing the fixed side, and the bearing support enters into the induction heating furnace through the insertion port; the temperature detection module is used to detect the temperature of the measured material in 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 provided 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; 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, quartz glass is provided in the temperature measuring hole, and the temperature detection module is provided 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 is a graphite support.

[0013] Optionally, a push rod is provided through the 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 measured material.

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

[0015] Optionally, two push rods are arranged through the support, and a measuring material and a standard sample are arranged on the support, and the displacement detection module includes two displacement sensors, one end of one push rod is connected to one displacement sensor, and 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] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] The ultra-high temperature thermal expansion coefficient tester in the present invention heats the measured material by induction heating, which greatly reduces heat loss, reduces the energy consumption ratio of the equipment, and increases the limit temperature of the thermal expansion coefficient tester, which can be used for the expansion coefficient of the material at a higher temperature (3000°C). By setting up an insulation layer, heat loss is effectively reduced, heating efficiency is improved, the temperature gradient inside the sample is reduced, and the accuracy of the thermal expansion coefficient test is improved. The temperature change of the measured material can be directly measured by an infrared thermometer, and the measurement is more accurate.

[0019] During the test, the instrument can be purged with inert gas through the left side. Commonly used gases such as N2, Ar, and He are used to protect objects in the furnace to prevent oxidation in high temperature environments. They can also be used to remove gaseous products during the heating process to prevent polluted gases generated by the decomposition of certain samples from contaminating the furnace chamber. Specific gases can also be introduced to measure the thermal expansion coefficient of materials in a specific gas environment.

[0020] The gas outlet is connected to a pump, so that the entire system can work under vacuum or a certain pressure condition. The transmission tube can also be used to further connect to FTIR, QMS and other systems to transport the product gas to these instruments for component detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the top view of the ultra-high temperature thermal expansion coefficient tester of the present invention;

[0023] Figure 2 It is a schematic diagram of the AA cross-sectional structure of the ultra-high temperature thermal expansion coefficient tester of the present invention in a closed state;

[0024] Figure 3 It is a schematic diagram of the structure of the ultra-high temperature thermal expansion coefficient tester of the present invention in the open state;

[0025] Figure 4 It is a structural schematic diagram of the differential structure in the ultra-high temperature thermal expansion coefficient tester of the present invention;

[0026] Figure 5 It is a schematic cross-sectional view of the differential structure in the ultra-high temperature thermal expansion coefficient tester of the present invention.

[0027] Explanation of the reference numerals: 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. measured 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 DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 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 arranged on the equipment platform 19, the fixed side 5 is arranged on one side of the equipment platform 19, and the movable side 3 is slidably arranged on the guide rail 4; the fixed side 5 includes a displacement detection module 8 and a supporting support; one end of the supporting support 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; an insertion port is provided on the side of the induction heating furnace facing the fixed side 5, and the supporting support enters the induction heating furnace through the insertion port; the temperature detection module is used to detect the temperature of the measured material 10 in the induction heating furnace.

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

[0032] A mobile base 18 is provided at the bottom of the mobile side 3, and the mobile base 18 is slidably connected to the guide rail 4, and the induction heating furnace is arranged on the mobile base 18. By pushing and pulling the mobile base 18, the furnace opening / closing operation is performed in the form of horizontal sliding, which is convenient for taking and feeding materials.

[0033] A quick-connect interface 7 is provided on the insertion port 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, a thermal 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 provided at each end of the quartz tube 12, the induction heating element 17 is provided at the center of the quartz tube 12, and a thermal 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 provided outside the quartz tube 12; an insertion port is provided in the middle of the water-cooled furnace cover 6 facing the fixed side 5. The quartz tube 12 is used as the furnace body, which does not interfere with the magnetic field, and the furnace body is sealed as a whole by a seal. The induction heating element 17 is heated by the alternating magnetic field of the induction heating coil 13, with high thermal efficiency and fast heating speed. The induction heating element 17 is affected by the magnetic field of the induction heating coil 13 to heat 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 provided in the temperature measuring hole, and a temperature detection module is provided on the outside of the quartz glass 15 .

[0036] A magnetic shielding cover 14 is arranged 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 to prevent the external environment from being affected.

[0037] The supporting support is a graphite support 9.

[0038] A push rod 21 is provided 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 measured 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 one side of the induction heating furnace. The gas inlet 1 is connected to an inert gas source, and the gas outlet 2 is connected to a vacuum pump or FTIR or QMS.

[0040] Under certain requirements, it can be connected to FTIR / QMS through an appropriate interface. The specified gas enters from the inlet of the thermal expansion analyzer, reacts with the sample under high temperature environment or takes away part of the vaporized sample before entering FTIR / QMS. At this time, FTIR / QMS can be used to determine the reaction products of the sample with the specified gas under high temperature, or the volatile components of the sample under high temperature environment, so that more data can be collected on the sample.

[0041] Embodiment 2:

[0042] like Figure 4 and 5 As shown, this embodiment is an improved embodiment based on the first embodiment. In this embodiment, two push rods 21 are provided through the support, and a measuring material 10 and a standard sample 20 are provided on the support. The displacement detection module 8 includes two displacement sensors. One end of one push rod 21 is connected to one displacement sensor, and 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 measured material 10 are placed on the graphite holder 9 at the same time, and the temperature is increased by the induction heating element 17. The infrared thermometer 16 measures the temperature change. Since there is a quartz glass 15 as a baffle on the left side, the expansion amount generated during the expansion of the measured material 10 extends to the right, and the displacement sensor can measure the length change value at this time.

[0044] Assume that the length of the test standard sample 20 and the measurement sample are both X, the temperature rise value is ΔT, the known expansion coefficient 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 measurement sample is L2. At this time, the expansion coefficient k of the test sample can be obtained by calculation:

[0045]

[0046] By measuring two samples simultaneously, the system is able to suppress some common mode interferences, such as equipment drift, temperature fluctuations, etc., which helps to improve the sensitivity and accuracy of the measurement. It also improves the anti-interference ability of the measurement system and improves the stability of the instrument.

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

[0048] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0049] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An ultra-high temperature thermal expansion coefficient tester, characterized in that: It includes 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 slidably arranged on the guide rail; the fixed side includes a displacement detection module and a bearing support; one end of the bearing support 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 is provided with an insertion port on the side facing the fixed side, and the bearing support enters the induction heating furnace through the insertion port; the temperature detection module is used to detect the temperature of the measured material in the induction heating furnace.

2. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that: A movable base is arranged at the bottom of the movable side, the movable base is slidably connected to the guide rail, and the induction heating furnace is arranged 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, a thermal insulation layer, a quartz tube, an induction heating coil and an induction heating element; the 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 thermal 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; the insertion port is provided 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 arranged in the middle of the water-cooled furnace cover away from the fixed side, quartz glass is arranged in the temperature measuring hole, and the temperature detection module is arranged 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 arranged 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 provided through the 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 measured material.

8. The ultra-high temperature thermal expansion coefficient tester according to claim 1, characterized in that: A gas inlet is provided on one side of the induction heating furnace, and a gas outlet is provided on one side of the induction heating furnace. The gas inlet is connected to an inert gas source, and the gas outlet is connected to a vacuum pump or 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, and the support is provided with a measuring material and a standard sample. The displacement detection module includes two displacement sensors, one end of one push rod is connected to one displacement sensor, and 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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