Apparatus for testing the thermal conductivity of thermal insulation coatings

Abstract

This utility model provides a testing device for the thermal conductivity of thermal insulation coatings, relating to the field of thermal insulation coating testing. The testing device includes: a constant temperature chamber; a container installed at the bottom of the constant temperature chamber for holding the thermal insulation coating to be tested; a leveling device installed inside the constant temperature chamber for leveling the upper surface of the thermal insulation coating contained in the container; a heating device installed on the constant temperature chamber for heating the upper surface of the thermal insulation coating contained in the container; a temperature detection module located at the bottom of the container for obtaining the measured temperature of the bottom of the thermal insulation coating; and a processor for obtaining the thermal conductivity of the thermal insulation coating based on the thickness of the thermal insulation coating and the time required for the surface temperature of the thermal insulation coating to rise to half of its maximum value.

Description

Technical Field

[0001] This utility model relates to the field of thermal insulation testing of coatings, and in particular to a testing device suitable for testing the thermal conductivity of thermal insulation coatings. Background Technology

[0002] Thermal insulation coatings, as a special type of functional coating, can form a coating with good thermal insulation properties on the surface of an object. They are a high-efficiency, environmentally friendly, and relatively easy-to-apply energy-saving material with important application value in many fields such as construction, industry, and transportation.

[0003] Thermal conductivity is an indicator of an insulating coating's fundamental ability to prevent heat conduction. Thermal conductivity (usually denoted by the symbol...) The thermal conductivity (or k) is expressed in units of W / (m·K) or W / (m·°C). It typically refers to the amount of heat transferred per second through a 1-meter-thick material over a 1-square-meter area under steady-state heat transfer conditions, when the temperature difference between the two sides is 1 degree Celsius (K or °C). A lower thermal conductivity generally indicates better insulation performance, a thinner coating thickness, better energy efficiency, and potential economic benefits. Therefore, to evaluate thermal insulation coatings, it is necessary to test their thermal conductivity.

[0004] During the measurement of the thermal conductivity of the thermal insulation coating, the inventors discovered that the smoothness and flatness of the coating surface affected the accuracy of the test results. Utility Model Content

[0005] In view of this, the present invention provides a testing device for the thermal conductivity of thermal insulation coatings, which at least partially solves the above problems, can make the test sample have a more uniform temperature distribution, and improve the accuracy of thermal conductivity testing.

[0006] To achieve the above objectives, this utility model provides a testing device for the thermal conductivity of thermal insulation coatings, comprising a constant temperature chamber, a container, a leveling device, a heating device, a temperature detection module, and a processor. The container is installed at the bottom of the constant temperature chamber and is suitable for containing the thermal insulation coating to be tested; the leveling device is installed inside the constant temperature chamber and is suitable for leveling the upper surface of the thermal insulation coating contained in the container; the heating device is installed on the constant temperature chamber and is suitable for heating the upper surface of the thermal insulation coating contained in the container; the temperature detection module is located at the bottom of the container and is suitable for obtaining the measured temperature of the bottom of the thermal insulation coating; the processor is suitable for obtaining the thermal conductivity of the thermal insulation coating based on the thickness of the thermal insulation coating and the time required for the surface temperature of the thermal insulation coating to rise to half of its maximum value.

[0007] According to an embodiment of the present invention, the leveling device includes a bracket, a telescopic part, and a scraper. The bracket is mounted on the constant temperature chamber; the telescopic part is mounted on the bracket and configured to extend and retract in the horizontal direction; and the scraper is mounted at the end of the telescopic part and extends downward above the container, configured to level the insulating coating protruding from the container under the drive of the telescopic part.

[0008] According to an embodiment of this utility model, the aforementioned testing device for the thermal conductivity of thermal insulation coatings further includes a sealing plate, a driving rod, and a resetting device. The sealing plate is placed at the bottom of the container, and its outer wall is slidably connected to the inner wall of the container. The temperature detection module is placed on the sealing plate. The driving rod is installed at the bottom of the sealing plate and extends through a through-hole formed in the bottom plate of the constant temperature chamber to drive the sealing plate to move vertically. The resetting device is disposed on the side wall of the through-hole, and the driving rod, resisting the elastic force of the resetting device, drives the sealing plate to move vertically.

[0009] According to an embodiment of the present invention, the reset device includes a plurality of guide grooves, a guide rod, and a guide block. The plurality of guide grooves are symmetrically arranged on the sidewall of the through hole relative to the drive rod; the guide rod is disposed within the guide groove; the guide block is sleeved on the bottom of the guide rod; and a reset spring is sleeved on the guide rod between the upper end of the guide groove and the guide block, so as to be compressed when the guide block moves upward with the guide rod.

[0010] According to an embodiment of the present invention, the heating device includes a control box and a laser emitter. The control box is disposed in the constant temperature chamber; the laser emitter is disposed in the control box and is configured to emit a laser beam toward the upper surface of the thermal insulation coating to heat the thermal insulation coating.

[0011] According to an embodiment of the present invention, a ventilation hole is provided at the bottom of the outer wall of the container, and a filter screen is provided on the inner wall of the hole, which is suitable for discharging air from the container when filling the container with heat-insulating coating.

[0012] According to an embodiment of the present invention, the above-mentioned device for testing the thermal conductivity of thermal insulation coating further includes an annular recovery box arranged around the container to receive the thermal insulation coating hanging from the top of the container.

[0013] According to an embodiment of the present invention, the above-mentioned testing device for the thermal conductivity of thermal insulation coatings is characterized in that it further includes a viewing window disposed on the side wall of the constant temperature chamber, which is suitable for observing the test conditions inside the constant temperature chamber.

[0014] According to an embodiment of the present invention, the above-mentioned testing device for the thermal conductivity of thermal insulation coatings is characterized in that it further includes a support frame, on which the constant temperature chamber is mounted, providing operating space for the lifting of the drive rod.

[0015] According to an embodiment of the present invention, the horizontal cross-section of the container can be constructed as square or circular.

[0016] This utility model provides a testing device for testing the thermal conductivity of thermal insulation coatings. The device involves pouring the prepared thermal insulation coating into a container, leveling the surface of the coating using a leveling device, and heating the surface of the coating using a heating device. This results in a more uniform temperature distribution on the test sample, with heat transferred from the top surface to the bottom. The temperature is then monitored in real-time by a temperature detection module, enabling accurate and rapid detection of the thermal conductivity of the thermal insulation coating. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0018] Figure 1 This schematic diagram illustrates the overall structure of a testing device for the thermal conductivity of thermal insulation coatings according to an embodiment of the present invention.

[0019] Figure 2 A schematic cross-sectional view of a testing device for the thermal conductivity of thermal insulation coatings according to an embodiment of the present invention is shown.

[0020] Figure 3 Schematic illustration based on Figure 2 A magnified view of position A in the cross-sectional view shown;

[0021] Figure 4 Schematic illustration based on Figure 2 A magnified view of position B in the cross-sectional view shown.

[0022] Figure Labels

[0023] 1. Incubator;

[0024] 2. Container;

[0025] 21. Ventilation opening;

[0026] 22. Filter screen;

[0027] 3. Leveling device;

[0028] 31. Scraper blade;

[0029] 32. Telescopic part;

[0030] 321. Outer shell;

[0031] 322. Electric motor;

[0032] 323. Lead screw;

[0033] 324. Limit block;

[0034] 325. Telescopic block;

[0035] 326. Telescopic pole;

[0036] 327. Support base;

[0037] 33. Bracket;

[0038] 4. Heating device;

[0039] 41. Control box;

[0040] 42. Laser emitter;

[0041] 5. Temperature detection module;

[0042] 6. Processor;

[0043] 7. Sealing plate;

[0044] 8. Drive lever;

[0045] 9. Reset device;

[0046] 91. Guide groove;

[0047] 92. Guide rod;

[0048] 93. Guide block;

[0049] 94. Return spring;

[0050] 10. Circular recycling bin;

[0051] 11. Viewport;

[0052] 12. Support frame. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0054] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0055] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0056] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0057] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0058] Figure 1 The schematic diagram illustrates the overall structure of the testing device for the thermal conductivity of the thermal insulation coating according to an embodiment of the present invention. Figure 2 A cross-sectional view of a testing apparatus for the thermal conductivity of an insulating coating according to an embodiment of the present invention is shown schematically.

[0059] This utility model provides a testing device suitable for testing the thermal conductivity of thermal insulation coatings. For example... Figure 1 , Figure 2As shown, the testing apparatus includes: a constant temperature chamber 1, a container 2, a leveling device 3, a heating device 4, a temperature detection module 5, and a processor 6. Container 2 is installed at the bottom of the constant temperature chamber 1 and is used to contain the thermal insulation coating to be tested. The leveling device 3 is installed inside the constant temperature chamber 1 and is used to level the upper surface of the thermal insulation coating contained in container 2. The heating device 4 is installed on the constant temperature chamber 1 and is used to heat the upper surface of the thermal insulation coating contained in container 2. The temperature detection module 5 is located at the bottom of container 2 and is used to obtain the measured temperature of the bottom of the thermal insulation coating. The processor 6 is used to obtain the thermal conductivity of the thermal insulation coating based on its thickness and the time required for the surface temperature to rise to half of its maximum value. When testing the thermal conductivity of the thermal insulation coating, the thermal insulation coating to be tested is poured into container 2. The top surface of the thermal insulation coating placed in container 2 must be higher than the top surface of container 2, forming a liquid seal to ensure that the interior of container 2 is completely filled.

[0060] According to the present invention, a testing device for testing the thermal conductivity of thermal insulation coatings is provided. The device involves pouring the prepared thermal insulation coating into container 2, leveling the surface of the coating in container 2 using a leveling device 3, and heating the surface of the coating using a heating device 4. This results in a more uniform temperature distribution on the test sample, with heat transferred from the top surface to the bottom surface. The temperature is then monitored in real-time by a temperature detection module 5, enabling accurate and rapid detection of the thermal conductivity of the coating. Furthermore, the device avoids errors caused by uneven or non-standardized operation of the sample surface due to manual handling, saving significant labor costs, improving the convenience and standardization of sample preparation, and increasing the accuracy of the thermal conductivity test and the precision of the preset program, thus greatly improving work efficiency.

[0061] Figure 3 Schematic illustration based on Figure 2 A magnified view of position A in the cross-sectional view shown.

[0062] In some embodiments, such as Figure 2 and Figure 3As shown, the leveling device 3 includes a scraper 31, a telescopic part 32, and a bracket 33. The bracket 33 is mounted on the constant temperature chamber 1; the telescopic part 32 is mounted on the bracket 33 and is configured to extend and retract in the horizontal direction; the scraper 31 is mounted on the end of the telescopic part 32 and extends downward above the container 2, configured to level the insulation coating extending out of the container 2 under the drive of the telescopic part 32. A ventilation hole 21 is provided at the bottom of the outer wall of the container 2, and a filter screen 22 is provided on the inner wall of the hole, which is suitable for venting air from the container 2 when filling the container 2 with insulation coating. The testing device also includes an annular recovery box 10, which is arranged around the container 2 to receive the insulation coating hanging from the top of the container 2.

[0063] In some embodiments, such as Figure 2 and Figure 3 As shown, the bracket 33 can be installed on the bottom or side wall of the constant temperature chamber 1 using bolted connections, snap-fit ​​connections, threaded connections, or other connection methods. The telescopic part 32 is installed on one side of the bracket 33. In some embodiments, the telescopic part 32 includes a housing 321, a motor 322, a lead screw 323, a limiting block 324, a telescopic block 325, a telescopic rod 326, and a support base 327. The motor 322 is disposed inside the housing 321, and its output end is axially connected to the lead screw 323 to drive the lead screw 323 to rotate. The telescopic block 325 is sleeved outside the lead screw 323 through a threaded hole, and the end of the telescopic block 325 away from the motor 322 is connected to the telescopic rod 326. A limiting block 324 passing through the telescopic block 325 is provided between the two ends of the housing 321 to restrict the telescopic block 325 from rotating with the lead screw 323. When the motor 322 drives the lead screw 323 to rotate, the lead screw 323 causes the telescopic block 325 to move horizontally, which in turn causes the telescopic rod 326 to move horizontally. The support base 327 is installed at the end of the telescopic rod 326, and the scraper 31 can be connected to the support base 327 by means of, but not limited to, threads. The scraper 31 and the support base 327 are detachably connected, which not only makes the installation of the scraper 31 more convenient and quick, but also facilitates the cleaning of the scraper 31.

[0064] Although the above description shows an embodiment where the telescopic part 32 is an electric mechanism that drives the telescopic rod 326 to move horizontally, the embodiments of this utility model are not limited to this. For example, the telescopic part 32 can also be implemented using pneumatic transmission (e.g., a pneumatic cylinder) or hydraulic transmission (e.g., a hydraulic cylinder) to achieve the telescopic function. The telescopic part 32 is configured to extend and retract in the horizontal direction, which can drive the installed scraper 31 to achieve reciprocating motion in the horizontal direction. The bottom of the scraper 31 is flush with the top surface of the container 2, which can scrape the insulation coating that is higher than the top surface of the container 2 to level it, thereby achieving rapid sample preparation. The excess insulation coating that is scraped off and falls can be placed in the annular recycling box 10 for recycling, avoiding material waste. At the same time, the scraper 31 agitates the top surface of the insulation coating, which can disrupt the surface tension balance of the liquid. These disturbances may cause the liquid to form temporary gaps or channels near the vent 21, allowing the gas trapped in the container 2 to be discharged through the vent 21, thereby minimizing the air in the test sample.

[0065] In some embodiments, the heating device 4 includes a control box 41 and a laser emitter 42. The control box 41 is disposed in the constant temperature chamber 1; the laser emitter 42 is disposed in the control box 41 and is configured to emit a laser beam toward the upper surface of the thermal insulation coating to heat the thermal insulation coating. For example, the control box 41 and the laser emitter 42 are mounted on the top of the constant temperature chamber 1. By setting the control box 41, the switching and frequency of the laser beam emitted by the laser emitter 42 can be controlled. When the laser emitter 42 emits a laser beam under the control of the control box 41, the laser beam vertically irradiates the surface of the test sample, instantly heating the upper surface portion of the test sample, i.e., the thermal insulation coating.

[0066] Figure 4 Schematic illustration based on Figure 2 A partially enlarged view of position B in the cross-sectional view shown. In some embodiments, such as Figure 2 and Figure 4As shown, the testing device also includes: a sealing plate 7, a drive rod 8, and a reset device 9. The sealing plate 7 is placed at the bottom of the container 2, and its outer wall is slidably connected to the inner wall of the container 2. The temperature detection module 5 is placed on the sealing plate 7. The drive rod 8 is installed at the bottom of the sealing plate 7 and extends through a through-hole formed in the bottom plate of the constant temperature chamber 1 to drive the sealing plate 7 to move vertically. The reset device 9 is located on the side wall of the through-hole, and the drive rod 8, against the elastic force of the reset device 9, drives the sealing plate 7 to move vertically. The sealing plate 7 is used to hold and seal the test sample poured into the container 2. The sealing plate 7 is slidably connected to the inner wall of the container 2, and can be directly contacted for sliding. Driven by the drive rod 8, the sealing plate 7 can push the insulation coating contained in the container 2 upwards. After being pushed out, under the elastic force of the reset device 9, it will drive the drive rod 8 downwards, thereby resetting the sealing plate 7. The temperature detection module 5 adopts a plate-shaped structure integrating a temperature sensor and a signal conversion circuit, mainly used for real-time monitoring, recording, and transmission of temperature data. The temperature detection module 5 and the processor 6 can be connected via, but not limited to, wires or wireless means. The top surface of the temperature detection module 5 is in close contact with the bottom surface of the insulation coating sample. After the laser emitter 42 instantaneously heats the test area of ​​the insulation coating, the temperature detection module 5 can detect the bottom surface temperature of the insulation coating in real time and transmit the detection data to the processor 6 via wires, generating a time-temperature curve. Then, through mathematical model inversion, the thermal conductivity can be calculated.

[0067] In one exemplary embodiment, such as Figure 4 As shown, the reset device 9 includes: multiple guide grooves 91, a guide rod 92, a guide block 93, and a reset spring 94. The multiple guide grooves 91 are symmetrically arranged on the sidewall of the through hole relative to the drive rod 8; the guide rod 92 is disposed within the guide groove 91; the guide block 93 is sleeved on the bottom of the guide rod 92; the reset spring 94 is sleeved on the guide rod 92 between the upper end of the guide groove 91 and the guide block 93, so as to be compressed when the guide block 93 moves upward with the guide rod 92. The guide groove 91 can be constructed as a cuboid groove, and the guide block 93 is connected to the sidewall of the drive rod 8. When the drive rod 8 is lifted upward to push the insulating coating in the container 2 upward, the drive rod 8 drives the guide block 93 to compress the reset spring 94 upward against its elastic force. The guide rod 92 can keep the reset spring 94 moving smoothly on it. When the force that lifts the drive rod 8 upward is removed, the return spring 94 recovers its elastic deformation under its own elastic force, thereby driving the drive rod 8 and the sealing plate 7 back to their initial positions.

[0068] In some embodiments, the testing apparatus further includes a viewing window 11 and a support frame 12. The viewing window 11 is disposed on the side wall of the constant temperature chamber 1 and is suitable for observing the testing conditions inside the constant temperature chamber 1. The viewing window 11 is a transparent window, allowing people to see the testing conditions inside the constant temperature chamber 1 from the outside. The support frame 12 is on which the constant temperature chamber 1 is mounted, providing operating space for the lifting of the drive rod 8.

[0069] In some embodiments, the horizontal cross-section of container 2 may be configured as square or circular.

[0070] In an exemplary embodiment of this invention, the test method employed is the laser flare method, used to measure the thermal diffusivity of materials. It belongs to the category of unsteady-state thermal conduction measurement methods due to its speed, accuracy, and applicability to various materials. Its basic principle is as follows: a short, strong laser pulse (typically a few milliseconds) is vertically irradiated onto one surface of a sample (usually a circular or square thin sheet sample); this laser pulse instantaneously raises the temperature of the sample surface by a small amount. Heat is conducted from the irradiated surface to the other, opposite surface of the sample. A high-sensitivity infrared detector or other temperature sensor is installed on the other surface (back surface) of the sample to accurately measure the change in back surface temperature over time; according to the one-dimensional unsteady-state thermal conduction theory, the shape of the temperature rise curve of the back surface over time is closely related to the thermal diffusivity of the material. By analyzing this temperature-time curve (especially the initial part of the curve), the thermal diffusivity of the sample can be calculated. .

[0071] If the density of the sample is known ( ) and specific heat capacity ( The thermal conductivity can be calculated using the following formula (1). :

[0072] ;

[0073] In the laser flare method, the thermal diffusivity can be obtained by the following formula (2). :

[0074] 1 / 2 (2);

[0075] Where: L is the thickness of the sample to be measured, T 1 / 2C is the time required for the sample surface temperature to rise to half of its maximum value, and C is a constant related to the sample geometry and boundary conditions. In this test, obtaining these physical quantities allows for the calculation of the thermal conductivity of the thermal insulation coating sample. According to the present invention, a testing device for the thermal conductivity of thermal insulation coatings is provided. During testing, the prepared thermal insulation coating is poured into container 2, ensuring the top surface of the coating is higher than the top surface of container 2. When the coating is placed inside container 2, excess gas inside container 2 is discharged through ventilation holes 21. A filter screen 22 is fixedly connected to one end of the inner wall of ventilation holes 21. By setting the filter screen 22, the thermal insulation coating can be intercepted, thus preventing leakage from the ventilation holes 21. Driven by the telescopic part 32, the bottom of the scraper 31 can scrape the thermal insulation coating protruding from the top surface of container 2 into the annular recovery box 10, enabling rapid and flat sample preparation for testing. The control box 41 controls the laser emitter 42 to emit laser pulses that irradiate the surface of the test sample, instantly heating it. The heat is transferred from the irradiated surface to the bottom of the test sample, and then to the temperature detection module 5. The temperature detection module 5 monitors the bottom temperature of the insulation coating in real time, and the monitoring data is transmitted to the processor 6. Through mathematical model inversion, the thermal conductivity can be calculated. After the test, the sealing plate 7, driven by the drive rod 8, can be lifted upwards to push out the insulation coating from the container 2. Driven by the reset device 9, the drive rod 8 and the sealing plate 7 can be returned to their initial positions. The sample preparation process and the testing process can be integrated to achieve automatic coating and testing.

[0076] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A testing device for the thermal conductivity of thermal insulation coatings, characterized in that, include: Incubator (1); Container (2), installed at the bottom of the constant temperature chamber (1), is suitable for containing the thermal insulation coating to be tested; A leveling device (3) is installed inside the constant temperature chamber (1) and is suitable for leveling the upper surface of the thermal insulation coating contained in the container (2); A heating device (4) is installed on the constant temperature box (1) and is suitable for heating the upper surface of the thermal insulation coating contained in the container (2); A temperature detection module (5) is set at the bottom of the container (2) and is suitable for obtaining the measured temperature of the bottom of the thermal insulation coating. as well as The processor (6) is adapted to obtain the thermal conductivity of the thermal insulation coating based on the thickness of the thermal insulation coating and the time required for the surface temperature of the thermal insulation coating to rise to half of its maximum value.

2. The testing device for the thermal conductivity of thermal insulation coatings according to claim 1, characterized in that, The leveling device (3) includes: The bracket (33) is installed in the constant temperature chamber (1); The telescopic part (32), mounted on the bracket (33), is configured to extend and retract in the horizontal direction; and A scraper (31), mounted at the end of the telescopic part (32) and extending downward above the container (2), is configured to scrape the insulating coating protruding from the container (2) under the drive of the telescopic part (32).

3. The testing device for the thermal conductivity of thermal insulation coatings according to claim 1, characterized in that, Also includes: A sealing plate (7) is placed at the bottom of the container (2). The outer wall of the sealing plate (7) is slidably connected to the inner wall of the container (2). The temperature detection module (5) is placed on the sealing plate (7). A drive rod (8) is installed at the bottom of the sealing plate (7) and extends through a through hole formed on the bottom plate of the constant temperature chamber (1) to drive the sealing plate (7) to rise and fall in the vertical direction; as well as The reset device (9) is located on the side wall of the through hole. The drive rod (8) moves the sealing plate (7) vertically against the elastic force of the reset device (9).

4. The testing device for the thermal conductivity of thermal insulation coatings according to claim 3, Its features are, The reset device (9) includes: Multiple guide grooves (91) are symmetrically arranged on the sidewall of the through hole relative to the drive rod (8); A guide rod (92) is provided in a guide groove (91); Guide block (93), fitted onto the bottom of guide rod (92); and A return spring (94) is sleeved on the guide rod (92) between the upper end of the guide groove (91) and the guide block (93) so as to be compressed when the guide block (93) moves upward with the guide rod (92).

5. The testing device for the thermal conductivity of thermal insulation coatings according to claim 1, characterized in that, The heating device (4) includes: A control box (41) is installed in the constant temperature box (1); A laser emitter (42), located in a control box (41), is configured to emit a laser beam toward the upper surface of the thermal insulation coating to heat the thermal insulation coating.

6. The testing device for the thermal conductivity of thermal insulation coatings according to claim 1, characterized in that, Ventilation holes (21) are provided at the bottom of the outer wall of the container (2), and a filter screen (22) is provided on the inner wall of the holes, which is suitable for discharging the air inside the container (2) when filling the container (2) with thermal insulation coating.

7. The testing device for the thermal conductivity of thermal insulation coatings according to claim 3, characterized in that, Also includes: An annular recycling bin (10) is arranged around the container (2) to receive the insulating coating that hangs from the top of the container (2).

8. The testing device for the thermal conductivity of thermal insulation coatings according to claim 1, characterized in that, Also includes: A viewing window (11) is provided on the side wall of the constant temperature chamber (1) and is suitable for observing the test conditions inside the constant temperature chamber (1).

9. The testing device for the thermal conductivity of thermal insulation coatings according to claim 3, characterized in that, Also includes: The support frame (12) is on which the constant temperature box (1) is installed, providing operating space for the lifting of the drive rod (8).

10. The testing device for the thermal conductivity of thermal insulation coatings according to claim 1, characterized in that, The horizontal cross-section of the container (2) can be constructed as a square or a circle.

Images