Thermal cycle testing device and testing method for insulation board

Abstract

The invention provides a thermal cycle test device and test method for an insulation board, and relates to the technical field of material test.The thermal cycle test device for the insulation board comprises a cabinet body with a test cavity and a clamp installed in the test cavity, and the clamp is used for clamping a sample and dividing the test cavity into a first cavity and a second cavity; a temperature control unit and a pressure control unit are arranged in the cabinet body, the temperature control unit firstly enables the temperature of the first chamber to be lower than the temperature of the second chamber so as to simulate a low-temperature environment in the B-type cabin in the first chamber, and then the pressure control unit enables the air pressure of the first chamber to be higher than the air pressure of the second chamber so as to simulate deformation of a sample under hydrostatic pressure in real service; meanwhile, the temperature in the first chamber and the temperature in the second chamber are detected through the first detection piece, so that the heat insulation efficiency of the insulation board under hydrostatic pressure in real service is simulated and calculated, and the authenticity of a test result is improved.

Description

Thermal cycling test apparatus and test method for insulating heat insulation boards Technical Field

[0001] This invention relates to the field of materials testing technology, and in particular to a thermal cycling testing device and method for insulating heat insulation boards. Background Technology

[0002] In the field of marine liquid cargo containment systems, particularly in liquefied natural gas (LNG) carriers, Type B tanks typically employ insulating panels to ensure their critical insulation and thermal insulation functions, guaranteeing the safe storage of liquid cargo at cryogenic temperatures and minimizing evaporation losses. PUF (polyurethane foam) is the primary insulation material in these panels, its insulation performance relying heavily on its internal, closed-cell structure filled with a large amount of still air. Performance testing of the insulating panels is necessary before application, with thermal cycling testing being a crucial method for evaluating the material's durability under repeated temperature changes. Based on international standards such as ASTM or ISO specifications, insulating panel samples are placed in a controlled temperature chamber to simulate actual operating conditions, such as a sudden drop from ambient temperature to a low temperature (e.g., -170°C) followed by a rise to a high temperature (e.g., 40°C), repeated multiple times to examine the material's dimensional stability, changes in thermal conductivity, and degradation of mechanical properties. Monitoring the physical response of the samples during testing verifies their reliability, ensuring the material maintains its insulation performance over long-term use.

[0003] However, Type B cabins are mostly used in dynamic, high-stress environments, which can damage the microscopic closed-cell structure of PUF foam, leading to irreversible degradation of its insulation performance. Existing thermal cycling testing equipment cannot simulate the insulation performance of insulating panels under real-world service conditions, and the test results are too idealized and lack realism.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] Therefore, it is necessary to provide an insulating heat insulation board thermal cycling test device and test method to address the problems existing in current thermal cycling test devices.

[0006] The above objective is achieved through the following technical solution: an insulating heat insulation board thermal cycling test device, comprising a cabinet with a test chamber and a clamp installed in the test chamber, the clamp being used to hold the sample and divide the test chamber into a first chamber and a second chamber; the cabinet is provided with a temperature control unit and a pressure control unit, the temperature control unit being used to keep the temperature of the first chamber lower than the temperature of the second chamber, and the pressure control unit being used to keep the air pressure of the first chamber higher than the air pressure of the second chamber; a first detection element is provided in both the first chamber and the second chamber, the first detection element being used to detect the temperature in the first chamber and the second chamber.

[0007] Furthermore, a drive unit is provided inside the cabinet, which is used to intermittently move the fixture and the sample toward the first chamber.

[0008] Furthermore, the fixture is equipped with a vibration unit, which is used to vibrate the fixture and the sample.

[0009] Furthermore, the pressure control unit is also used to synchronously increase the air pressure in the first chamber and the second chamber.

[0010] Furthermore, the sample includes multiple insulating heat insulation boards and multiple splicing strips, with the splicing strips positioned between two adjacent insulating heat insulation boards.

[0011] Furthermore, the fixture includes a frame and a connector, the frame being mounted inside the test chamber, and the connector enabling the edge of the sample to move relative to the frame.

[0012] Furthermore, a second detection element is provided in both the first chamber and the second chamber, which is used to detect the temperature of the sample surface.

[0013] Furthermore, the drive unit has a first adjustment module, which has a preset speed when the fixture and the sample move intermittently toward the first chamber, and the first adjustment module is used to change the preset speed.

[0014] Furthermore, the vibration unit has a second adjustment module, which is used to change the preset frequency when the fixture and the sample vibrate.

[0015] The present invention also includes the following technical solution: a thermal cycling test method for an insulating heat insulation board, comprising the following steps: S1, installing a clamp holding a sample in a test chamber, a temperature control unit making the temperature of the first chamber lower than the temperature of the second chamber, and a pressure control unit making the air pressure of the first chamber higher than the air pressure of the second chamber, selecting to execute S11, S12, S13 or S2; S11, a drive unit making the clamp and sample move intermittently towards the first chamber; S12, a vibration unit making the clamp and sample vibrate; S13, a pressure control unit making the air pressure of the first chamber and the second chamber rise synchronously; S2, a first detection element detecting the temperature in the first chamber and the second chamber, and calculating the heat insulation efficiency of the sample.

[0016] The present invention has at least the following beneficial effects: the temperature control unit first lowers the temperature of the first chamber than the temperature of the second chamber to simulate the low-temperature environment inside the B-type cabin in the first chamber; the pressure control unit then raises the air pressure of the first chamber higher than the air pressure of the second chamber to simulate the deformation of the sample under hydrostatic pressure during actual service; at the same time, the temperature in the first and second chambers is detected by the first detection element, thereby simulating and calculating the thermal insulation efficiency of the insulating heat insulation board under hydrostatic pressure during actual service, and improving the authenticity of the test results. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the thermal cycling test device for the insulating heat insulation board provided in an embodiment of the present invention; Figure 2 is a schematic diagram of the first chamber and the second chamber; Figure 3 is a schematic diagram of the third chamber and the fourth chamber; Figure 4 is a schematic diagram of the fixture and the sample; Figure 5 is an exploded view of the parts in Figure 4; Figure 6 is a front view of Figure 4; Figure 7 is a sectional view along the AA direction of Figure 6; Figure 8 is a schematic diagram of the fixture; Figure 9 is a front view of Figure 8; Figure 10 is a sectional view along the BB direction of Figure 9; Figure 11 is an exploded view of the parts in Figure 8; Figure 12 is a schematic diagram of the substrate and the clamping plate in Figure 11; Figure 13 is a schematic diagram of the sample; Figure 14 is a schematic diagram of the insulating heat insulation board.

[0018] Wherein: 100, cabinet; 101, first chamber; 102, second chamber; 103, third chamber; 104, fourth chamber; 105, first test piece; 106, vibration unit; 107, motor; 108, lead screw; 200, fixture; 201, frame; 202, bracket; 203, base plate; 204, hinge shaft; 205, slot; 206, clamping plate; 207, bolt; 208, simulated cabin plate; 209, sealing frame; 210, elastic element; 300, sample; 301, insulating heat insulation board; 302, splicing strip. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] As shown in Figures 1 to 14, this embodiment of the invention provides a thermal cycling test device for an insulating heat insulation board (hereinafter referred to as the thermal cycling test device), including a cabinet 100 with a test chamber and a clamp 200 installed in the test chamber. The clamp 200 is used to hold the sample 300 and divide the test chamber into a first chamber 101 and a second chamber 102. The cabinet 100 is provided with a temperature control unit and a pressure control unit. The temperature control unit is used to make the temperature of the first chamber 101 lower than the temperature of the second chamber 102, and the pressure control unit is used to make the air pressure of the first chamber 101 higher than the air pressure of the second chamber 102. A first detection element 105 is provided in both the first chamber 101 and the second chamber 102. The first detection element 105 is used to detect the temperature in the first chamber 101 and the second chamber 102.

[0023] The temperature control unit first lowers the temperature of the first chamber 101 than the temperature of the second chamber 102 to simulate the low-temperature environment inside the B-type cabin in the first chamber 101. The pressure control unit then raises the air pressure in the first chamber 101 higher than the air pressure in the second chamber 102 to simulate the deformation of the sample 300 under hydrostatic pressure during actual service. At the same time, the temperature inside the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the thermal insulation efficiency of the insulating heat insulation board 301 under hydrostatic pressure during actual service, and improving the authenticity of the test results.

[0024] The following describes the thermal cycling test device. The temperature control unit includes a refrigeration component and a ventilation component. The refrigeration component mainly includes a refrigeration unit, evaporator, circulating fan, air ducts, and valves, used to supply stable and controllable low-temperature air into the first chamber 101. The ventilation component includes a third chamber 103 and a fourth chamber 104, both connected to the second chamber 102. The third chamber 103 introduces ambient temperature natural air into the second chamber 102 and exhausts it through the fourth chamber 104. The third chamber 103 also houses a temperature regulation component, which includes a heating element, temperature sensor, and control system, used to regulate the temperature of the air introduced into the second chamber 102. The pressure control unit includes a pressure generating device (such as an air compressor and vacuum pump), pressure sensors (located in the first chamber 101 and the second chamber 102 respectively), valves, and a control system, used to establish and control different air pressures in the first chamber 101 and the second chamber 102. The first detection element 105 is a temperature sensor capable of detecting the temperature within the first chamber 101 and the second chamber 102. The first detection element 105 can be a platinum resistance temperature sensor or a thermocouple; its structure and working principle are existing technologies, and no specific selection is limited here. In use, the temperature difference Δt between the first chamber 101 and the second chamber 102 is measured, along with the heat flow rate Q (in watts W) through the sample 300, the thickness d (in meters) of the sample 300, and the thermally conductive area A (in meters). 2 The thermal conductivity λ can be calculated using the formula λ = Q·d / (A·Δt). The structure and working principle of the aforementioned thermal cycling test device, as well as the calculation of the thermal conductivity λ, are existing technologies and will not be elaborated upon here.

[0025] The planes on which the fixture 200 and the sample 300 are located are both vertical planes, which divide the test chamber into a first chamber 101 and a second chamber 102 in the horizontal direction. The fixture 200 is sealed to the test chamber to ensure that the first chamber 101 and the second chamber 102 are isolated from each other.

[0026] Furthermore, a second detection element is provided in both the first chamber 101 and the second chamber 102. The second detection element is used to detect the temperature of the surface of the sample 300, thereby further improving the authenticity of the test results.

[0027] The second detection element can be an infrared temperature sensor, a platinum resistance temperature sensor, or a thermistor, etc., to detect the temperature at different locations on the surface of the sample 300. The structure and working principle of the second detection element are existing technologies, and its specific selection is not limited here.

[0028] In one embodiment, the cabinet 100 is provided with a drive unit for intermittently moving the clamp 200 and the sample 300 toward the first chamber 101.

[0029] The bulkhead of the Type B compartment may also be subject to instantaneous pressure changes (such as the impact force of liquid cargo inside the compartment when partially loaded into the Type B compartment), causing the insulating heat insulation board 301 to undergo synchronous impact deformation due to sway loads, affecting the heat insulation performance of the insulating heat insulation board 301. The driving unit of this invention causes the clamp 200 and the sample 300 to move intermittently towards the first chamber 101, and the air pressure in the first chamber 101 increases in a pulsed manner, simulating the environment of pulsed air pressure increase in the compartment, causing the sample 300 to generate pulsed pressure fluctuations and further deformation, simulating the deformation of the sample 300 under sway loads during actual service. At the same time, the temperature in the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the heat insulation efficiency of the insulating heat insulation board 301 under sway loads during actual service, further improving the authenticity of the test results.

[0030] The fixture 200 includes a frame 201 and a connecting part. The frame 201 can move along the test chamber, and the direction of movement is parallel to the line connecting the first chamber 101 and the second chamber 102. Referring to Figures 4 and 5, the drive unit includes a motor 107 and a lead screw 108. The motor 107 is equipped with a corresponding power supply and control module to control its start / stop and rotation direction. The output end of the motor 107 is fixed to the lead screw 108, which is parallel to the line connecting the first chamber 101 and the second chamber 102. The lead screw 108 is threadedly connected to the frame 201. The output end of the motor 107 drives the lead screw 108 to rotate, causing the fixture 200 and the sample 300 to move intermittently towards the first chamber 101. Furthermore, multiple drive units can be evenly distributed along the outer contour of the frame 201 to ensure the stability of the movement of the fixture 200 and the sample 300.

[0031] Furthermore, the drive unit has a first adjustment module, and the clamp 200 and the sample 300 move intermittently toward the first chamber 101 at a preset speed. The first adjustment module is used to change the preset speed.

[0032] Differences in instantaneous pressure can cause variations in sway load, resulting in varying degrees of impact deformation of the insulating heat shield 301. The first adjustment module of this invention can change the preset speed to alter the magnitude of the sway load, simulating the different sway loads experienced by the Type B cabin bulkhead during actual service, thus further enhancing the realism of the test results.

[0033] In one embodiment, the fixture 200 is provided with a vibration unit 106, which is used to vibrate the fixture 200 and the sample 300.

[0034] The bulkhead of the Type B compartment may also be subjected to vibration loads (such as localized high-frequency vibrations caused by the main engine, propeller, and wave impact), which are synchronously transmitted to the insulating heat insulation plate 301, affecting its connection stability and indirectly impacting the heat insulation performance of the insulating heat insulation plate 301. The vibration unit 106 of this invention vibrates the sample 300, simulating the changes in the sample 300 under vibration loads during actual service. Simultaneously, the temperature inside the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the heat insulation efficiency of the insulating heat insulation plate 301 under vibration loads during actual service, further improving the authenticity of the test results.

[0035] Among them, the vibration unit 106 is a vibrator, which can be in the form of electromagnetic, mechanical or electro-hydraulic type, to make the clamp 200 and the sample 300 vibrate, and is equipped with a corresponding power source and control module to control vibration parameters such as amplitude and vibration waveform.

[0036] Furthermore, the vibration unit 106 has a second adjustment module, and the clamp 200 and the sample 300 have a preset frequency when vibrating. The second adjustment module is used to change the preset frequency.

[0037] The vibration frequency of the Type B bulkhead subjected to vibration loads varies considerably depending on the ship's sailing status and sea conditions. The second adjustment module of this invention can change the preset frequency to simulate different vibration loads experienced by the Type B bulkhead during actual service, further improving the realism of the test results.

[0038] In one embodiment, the pressure control unit is also used to synchronously increase the air pressure in the first chamber 101 and the second chamber 102.

[0039] PUF foam undergoes compaction and creep under long-term stress, resulting in a reduction in its actual effective thickness and an increase in its thermal conductivity λ, making it impossible to achieve the designed thermal resistance and affecting the thermal insulation performance of the insulating heat insulation board 301. The pressure control unit of this invention synchronously increases the air pressure in the first chamber 101 and the second chamber 102. At this time, both sides of the sample 300 are subjected to high pressure, causing it to thin under pressure. This simulates the compaction and creep phenomena that occur when the sample 300 is thinned under pressure during actual service. Simultaneously, the temperature inside the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the thermal insulation efficiency of the insulating heat insulation board 301 under pressure thinning during actual service, further improving the authenticity of the test results.

[0040] When the pressure control unit is in operation, the pressure rise in the first chamber 101 and the second chamber 102 can be selected and set as needed to simulate and calculate the insulation efficiency of the insulating heat insulation board 301 under different pressure reduction conditions during actual service, thereby further improving the authenticity of the test results.

[0041] In one embodiment, the sample 300 includes a plurality of insulating heat insulation plates 301 and a plurality of splicing strips 302, the splicing strips 302 being disposed between two adjacent insulating heat insulation plates 301.

[0042] Multiple insulating heat insulation boards 301 are spliced ​​together to form a sample 300, and splicing strips 302 are used to simulate the actual service state of the insulating heat insulation board 301, so as to more accurately simulate and calculate the heat insulation efficiency of the insulating heat insulation board 301 in actual service, and further improve the authenticity of the test results.

[0043] Preferably, as shown in Figures 13 and 14, the sample 300 includes four insulating heat insulation plates 301 and three splicing strips 302 to simulate more splicing situations of the insulating heat insulation plates 301 under the premise of limited size. For example, Figure 13 covers a variety of splicing situations, such as two insulating heat insulation plates 301 being adjacent vertically, adjacent horizontally, and three insulating heat insulation plates 301 being adjacent, which can more accurately simulate the real service state of the insulating heat insulation plates 301 and further improve the authenticity of the test results.

[0044] In addition, when testing the insulation efficiency on both sides of the insulating heat insulation board 301, the insulation efficiency on both sides of the splicing strip 302 can also be tested to further improve the authenticity of the test results.

[0045] The insulating heat insulation board 301 comprises two layers: the outer layer consists of an outer protective material and PUF foam, which can be metal, fiberglass, or TPO, etc.; the inner layer consists of PUF foam and an insulating mounting plate, etc., from the outside to the inside. Between the two layers, there is a rigid secondary shield and fiberglass mesh, etc., to prevent the PUF foam from deforming and cracking due to thermal expansion and contraction. Flexible materials are pasted on all four sides of the insulating heat insulation board 301 to effectively protect the foam from damage during extrusion and subsequent cold leakage. The flexible materials can be glass wool, EVA, or melamine, etc. The splicing strip 302 consists of, from the outside in, an outer protective material, a flexible material, and PUF foam, etc. The outer protective material can be metal, butyl tape, or TPO, etc., used to prevent cold leakage; the flexible material acts as a seal to prevent cold leakage; the flexible compressible material can be glass wool or melamine, etc. Both the PUF foam and the flexible compressible material can, to a certain extent, prevent the deformation of the B-type compartment bulkhead during ship navigation, which could lead to damage to the insulation and heat insulation board 301, and can also prevent cold leakage. By setting the insulation and heat insulation board 301 and splicing strip 302 with the above structure, a cold insulation function can be achieved, and installation is also convenient.

[0046] In one embodiment, the fixture 200 includes a frame 201 and a connecting part. The frame 201 is installed in the test chamber, and the connecting part is used to enable the edge of the sample 300 to move relative to the frame 201, thereby reducing the shear force between the sample 300 and the frame 201 caused by the deformation of the sample 300 to a certain extent, and more realistically simulating the actual deformation of the sample 300.

[0047] As shown in Figure 2, a support 202 is provided between the first chamber 101 and the second chamber 102. As shown in Figures 4 to 7, an elastic element 210 is provided between the frame 201 and the support 202. Both the support 202 and the elastic element 210 are frame-shaped structures. Initially, the elastic element 210 is in a compressed state, which causes the frame 201 to tend to move away from the support 202. As shown in Figures 8 to 12, the connecting part includes four base plates 203, all located within the frame 201. The base plates 203 are hinged to the frame 201, and the hinge shaft 204 is detachable. The base plates 203 have inwardly formed slots 205, and multiple clamping plates 206 are provided in the slots 205. Multiple bolts 207 are threaded onto the base plates 203, and the bolts 207 and the clamping plates 206 can rotate relative to each other. In use, the assembled sample 300 is installed on the simulated chamber plate 208, and the edge of the simulated chamber plate 208 is placed in the slot 205. The bolt 207 is rotated to push the clamping plate 206 to gradually approach and clamp the edge of the simulated chamber plate 208. After all four sides of the simulated chamber plate 208 are clamped, the base plate 203 is hinged to the frame 201 through the hinge shaft 204. The sample 300 is fixed on the frame 201. When the sample 300 deforms due to the different pressure on both sides, the edge of the sample 300 first rotates relative to the frame 201 to more realistically simulate the actual deformation of the sample 300.

[0048] Additionally, as shown in Figures 9 to 11, a sealing frame 209 is provided between the frame 201 and the substrate 203 to ensure the sealing between the frame 201 and the substrate 203. Moreover, the contact positions of two adjacent substrates 203 are all inclined surfaces and can be provided with rubber pads to ensure the sealing at the contact points.

[0049] This invention also provides a thermal cycling test method for an insulating heat insulation board, comprising the following steps: S1, installing a clamp 200 holding a sample 300 in a test chamber, a temperature control unit lowering the temperature of the first chamber 101 below the temperature of the second chamber 102, and a pressure control unit raising the air pressure of the first chamber 101 above the air pressure of the second chamber 102, selecting to execute S11, S12, S13, or S2; S11, a driving unit intermittently moving the clamp 200 and the sample 300 toward the first chamber 101; S12, a vibration unit 106 vibrating the clamp 200 and the sample 300; S13, a pressure control unit synchronously increasing the air pressure of the first chamber 101 and the second chamber 102; S2, a first detection element 105 detecting the temperature in the first chamber 101 and the second chamber 102, and calculating the heat insulation efficiency of the sample 300.

[0050] This invention can simulate and calculate the insulation efficiency of the insulating heat insulation board 301 under hydrostatic pressure, swaying load, vibration load and pressure thinning during actual service as needed, thereby improving the authenticity of the test results.

[0051] The working principle of this invention is as follows: Multiple insulating heat insulation boards 301 and multiple splicing strips 302 are spliced ​​together to form a sample 300, which is then installed on a simulation chamber plate 208. The edge of the simulation chamber plate 208 is placed in the slot 205. The bolt 207 is rotated to push the clamping plate 206 to gradually approach and clamp the edge of the simulation chamber plate 208. After all four sides of the simulation chamber plate 208 are clamped, the base plate 203 is hinged to the frame 201 through the hinge shaft 204. The sample 300 is fixed on the frame 201. The frame 201 is connected to the bracket 202 and a sealing frame 209 is installed. An elastic element 210 in a compressed state is installed between the two to place the sample 300 in the test chamber. Then, the motor 107 and the lead screw 108 are installed to complete the test preparation work. The following simulation tests can be performed as needed: the temperature control unit keeps the temperature of the first chamber 101 lower than the temperature of the second chamber 102 to simulate the low-temperature environment inside the B-type cabin in the first chamber 101; the pressure control unit keeps the air pressure in the first chamber 101 higher than the air pressure in the second chamber 102 to simulate the deformation of the sample 300 under hydrostatic pressure during actual service; and the temperature inside the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the thermal insulation efficiency of the insulating heat insulation board 301 under hydrostatic pressure during actual service.

[0052] The temperature control unit keeps the temperature of the first chamber 101 lower than that of the second chamber 102 to simulate the low-temperature environment inside the Type B cabin. The pressure control unit keeps the air pressure in the first chamber 101 higher than that in the second chamber 102. The drive unit moves the clamp 200 and the sample 300 intermittently toward the first chamber 101, causing the air pressure in the first chamber 101 to increase in a pulsed manner, simulating the environment of pulsed air pressure increase inside the cabin. This causes the sample 300 to generate pulsed pressure fluctuations and further deformation, simulating the deformation of the sample 300 under shaking load during actual service. At the same time, the temperature inside the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the heat insulation efficiency of the insulating heat insulation board 301 under shaking load during actual service.

[0053] The temperature control unit keeps the temperature of the first chamber 101 lower than that of the second chamber 102 to simulate the low-temperature environment inside the B-type cabin in the first chamber 101. The pressure control unit keeps the air pressure in the first chamber 101 higher than that in the second chamber 102. The vibration unit 106 causes the sample 300 to vibrate to simulate the changes in the sample 300 under vibration load during actual service. At the same time, the temperature in the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the heat insulation efficiency of the insulating heat insulation board 301 under vibration load during actual service.

[0054] The temperature control unit keeps the temperature of the first chamber 101 lower than that of the second chamber 102 to simulate the low-temperature environment inside the B-type cabin in the first chamber 101. The pressure control unit keeps the air pressure in the first chamber 101 higher than that in the second chamber 102. The pressure control unit also keeps the air pressure in the first chamber 101 and the second chamber 102 rising synchronously. At this time, the sample 300 is subjected to high pressure on both sides, causing it to be thinned under pressure. This simulates the compaction and creep phenomena that occur when the sample 300 is thinned under pressure during actual service. At the same time, the temperature inside the first chamber 101 and the second chamber 102 is detected by the first detection element 105, thereby simulating and calculating the heat insulation efficiency of the insulating heat insulation board 301 under pressure thinning during actual service.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A thermal cycling testing device for an insulating heat insulation board, characterized in that, The device includes a cabinet with a test chamber and a fixture installed inside the test chamber. The fixture is used to hold the sample and divide the test chamber into a first chamber and a second chamber. The cabinet is equipped with a temperature control unit and a pressure control unit. The temperature control unit is used to keep the temperature of the first chamber lower than the temperature of the second chamber, and the pressure control unit is used to keep the air pressure of the first chamber higher than the air pressure of the second chamber. A first detection element is provided in both the first chamber and the second chamber. The first detection element is used to detect the temperature in the first chamber and the second chamber.

2. The thermal cycling test device for insulating heat insulation boards according to claim 1, characterized in that, The cabinet is equipped with a drive unit, which is used to intermittently move the fixture and the sample toward the first chamber.

3. The thermal cycling test device for insulating heat insulation boards according to claim 2, characterized in that, The fixture is equipped with a vibration unit, which is used to vibrate the fixture and the sample.

4. The thermal cycling test device for insulating heat insulation boards according to claim 3, characterized in that, The pressure control unit is also used to synchronously increase the air pressure in the first and second chambers.

5. The thermal cycling test device for insulating heat insulation boards according to claim 1, characterized in that, The sample includes multiple insulating heat insulation boards and multiple splicing strips, with the splicing strips positioned between two adjacent insulating heat insulation boards.

6. The thermal cycling test device for insulating heat insulation boards according to claim 1, characterized in that, The fixture includes a frame and a connector. The frame is installed inside the test chamber, and the connector is used to allow the edge of the sample to move relative to the frame.

7. The thermal cycling test device for insulating heat insulation boards according to claim 1, characterized in that, Both the first and second chambers are equipped with a second detection element, which is used to detect the temperature of the sample surface.

8. The thermal cycling test device for insulating heat insulation boards according to claim 2, characterized in that, The drive unit has a first adjustment module. When the clamp and the sample move intermittently toward the first chamber, there is a preset speed. The first adjustment module is used to change the preset speed.

9. The thermal cycling test device for insulating heat insulation boards according to claim 3, characterized in that, The vibration unit has a second adjustment module. When the fixture and the sample vibrate, there is a preset frequency. The second adjustment module is used to change the preset frequency.

10. A method for thermal cycling testing of an insulating heat insulation board, applied to the thermal cycling testing device for the insulating heat insulation board as described in claim 4, characterized in that, Includes the following steps: S1. Install the clamp holding the sample into the test chamber. The temperature control unit makes the temperature of the first chamber lower than the temperature of the second chamber, and the pressure control unit makes the air pressure of the first chamber higher than the air pressure of the second chamber. Select to execute S11, S12, S13 or S2; S11. The drive unit makes the clamp and sample move intermittently towards the first chamber; S12. The vibration unit makes the clamp and sample vibrate; S13. The pressure control unit makes the air pressure of the first chamber and the second chamber rise synchronously; S2. The first detection element detects the temperature in the first chamber and the second chamber and calculates the thermal insulation efficiency of the sample.

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