Heat exchange blocking assembly for environment simulation box body

Abstract

The invention provides a heat exchange blocking assembly for an environment simulation box, which comprises an outer ring surface and an inner ring surface, the outer ring surface is connected with the upper side of the inner ring surface through an upper sealing plate, the side, close to the outer ring surface, of the upper sealing plate is fixedly connected with the outer ring surface, the side, close to the inner ring surface, of the upper sealing plate abuts against and fits the inner ring surface, and the inner ring surface is fixedly connected with a connecting rod; a cavity formed among the outer ring face, the inner ring face and the upper sealing plate is divided into a heat preservation cavity on the upper side and a sealing cavity on the lower side, the heat preservation cavity is filled with heat preservation materials, and at least two ultrathin heat preservation rings arranged in parallel are arranged in the sealing cavity. The movable sealing ring is arranged between the connecting rod and the sleeve, so that the functions of keeping the temperature in the environment simulation box body and insulating and isolating the upper cavity and the lower cavity are achieved, the ultrathin insulating rings are arranged in the sealing cavity, the leakproofness can be effectively guaranteed, external air is isolated from gas exchange in the testing cavity when the connecting rod acts, and the testing efficiency is improved. And the environment temperature in the test cavity is prevented from being influenced.

Description

Technical Field

[0001] This invention relates to a heat exchange barrier assembly for an environmental simulation chamber, belonging to the technical field of environmental simulation testing device components. Background Technology

[0002] In static tensile, compression, bending, and fatigue tests of materials, environmental simulation devices are required to simulate low-temperature, normal-temperature, and high-temperature environments. These devices provide temperature simulation, and the testing machine applies short-term or continuous loading to the material to test its mechanical properties under specific temperature conditions. Maintaining a stable test temperature is crucial for accurate experimental data. Therefore, during the experiment, the connection between the loading rod and the environmental simulation device requires strict sealing and thermal insulation to ensure the accuracy of the temperature simulation. However, in actual tests, the loading rod and the environmental simulation device may experience small-amplitude unidirectional or reciprocating relative movements, posing a challenge to the sealing technology at the connection point.

[0003] Existing Chinese patent CN117167478A discloses a high-temperature resistant rubber seal with heat insulation function. While the disclosed technical solution mentions how to achieve sealing and heat insulation, its structural design is complex, difficult to implement, and costly. Furthermore, it cannot be quickly replaced when testing in different temperature ranges. Another patent, CN220378868U, describes a high-temperature resistant rubber sealing ring. Its heat insulation effect relies on an inner heat-insulating protective ring and a heat-insulating pad ring to isolate heat from high-temperature gases, reducing heat absorption by the rubber sleeve. The heat absorbed by the rubber sleeve is then quickly transferred to the outside air for cooling and heat dissipation through a heat-conducting ring and a heat-dissipating ring, maintaining the rubber sleeve's stable shape. Although this structure achieves sealing between the upper and lower parts, its heat insulation effect cannot actually guarantee a constant internal temperature.

[0004] The aforementioned existing technologies cannot achieve a good seal when the connecting rod and the environmental chamber are in relative motion. Therefore, there is an urgent need for a sealing device that can achieve both thermal insulation and a good seal at the connection between the connecting rod and the environmental chamber when the connecting rod moves during environmental simulation testing. Summary of the Invention

[0005] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a heat exchange barrier assembly for an environmental simulation enclosure, thereby solving the problems mentioned in the background section.

[0006] Technical solution: A heat exchange barrier assembly for an environmental simulation chamber, comprising a movable sealing ring, the movable sealing ring comprising an outer ring and an inner ring, the outer ring and the inner ring being connected on the upper and lower sides by an upper sealing plate, the upper sealing plate being fixedly connected to the outer ring on the side near the outer ring and abutting against the inner ring on the side near the inner ring, the outer ring being tightly fitted to the inner wall of the sleeve on which the sealing ring is installed, and the inner ring being fixedly connected to a connecting rod;

[0007] The cavity formed by the outer ring, inner ring, and upper sealing plate is divided into an upper insulation cavity and a lower sealing cavity. The insulation cavity is filled with insulation material, and the sealing cavity is provided with at least two ultra-thin insulation rings arranged parallel to each other. The thickness of the ultra-thin insulation rings is set to be less than 0.1mm. The side of the ultra-thin insulation ring closer to the outer ring is fixedly connected to the outer ring, and the side closer to the inner ring is interference-fitted with the inner ring. When the inner ring is driven up and down by the connecting rod, there is static friction between the ultra-thin insulation ring and the inner ring.

[0008] This invention maintains the temperature within the environmental simulation chamber by setting a movable sealing ring between the connecting rod and the sleeve. The upper and lower cavities respectively provide insulation and isolation. Multiple ultra-thin insulation rings are installed in the sealed cavity, with an interference fit between the ultra-thin insulation rings and the inner ring. In the initial state, they are in a slightly bent state. When fatigue testing of the test object is performed, the connecting rod moves less than 1 mm under the drive of the fatigue testing machine. Static friction occurs between the ultra-thin insulation rings and the inner rings. During the process, the ultra-thin insulation rings remain in close contact with the inner rings. The multi-layer ultra-thin insulation ring structure effectively ensures airtightness, preventing gas exchange between the external air and the test chamber when the connecting rod moves, thus avoiding the influence of the ambient temperature inside the test chamber. The upper insulation cavity achieves good temperature isolation, preventing the temperature difference between the internal and external temperatures from affecting the temperature of the test chamber, ultimately achieving a constant temperature in the environmental simulation chamber.

[0009] When used in an environment temperature simulation of -270℃ to 200℃, the insulation cavity is filled with aerogel composite insulation cotton, and the outer ring, inner ring, upper sealing plate, and ultra-thin insulation ring are all made of polytetrafluoroethylene.

[0010] By using aerogel composite insulation cotton as the insulation material to fill the insulation cavity, the insulation material is suitable for temperatures ranging from -270℃ to 200℃ and remains unaffected during long-term use, ensuring continuous temperature insulation. The remaining materials are made of polytetrafluoroethylene, which also has good physical property stability within the temperature range of -270℃ to 200℃. This not only achieves temperature insulation but also has a certain degree of elastic deformation capability, resulting in good airtightness.

[0011] When applied to simulate an ambient temperature of -270℃ to -60℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition. The partition is fixedly connected to the inner side of the outer ring and abuts against the outer side of the inner ring. Both the partition and the upper sealing plate are provided with longitudinal guide grooves with corresponding positions. The longitudinal guide grooves are evenly distributed along the inner circumference of the insulation cavity.

[0012] Two push plates, one near the outer ring and the other near the inner ring, are slidably arranged along the longitudinal guide groove. A telescopic assembly is provided between the two push plates. The telescopic assembly includes a telescopic mechanism with each telescopic unit being rhomboid and hinged to each other. The telescopic units are hinged end to end and spaced apart to allow for deformation. A support leg is provided at the hinge of two adjacent telescopic units. The support leg is slidably arranged in a transverse guide groove opened on the partition plate. The hinge of any telescopic unit near the inner push plate abuts against the inner push plate, and the hinge of any telescopic unit near the outer push plate is fixedly connected to the outer push plate by a fixedly arranged bent metal sheet.

[0013] A limit ring is provided in the middle of the leg, and PE braided wire is arranged around the lower side of the limit ring of two adjacent legs. The PE braided wire passes through a small hole in the upper cover. By pulling the PE braided wire, the two legs are controlled to move inward, thus controlling the change of the telescopic structure.

[0014] To ensure the upper and lower cavities do not interfere with each other, a partition is installed to separate them, providing a mounting base for the push plate. When the annular structure contracts, the overall circumference of the annular structure decreases, the rhombus changes from a slender shape to a short and thick shape, and the spacing between the legs decreases. At this time, the distance between the two ends of each rhombus increases, and the outer end of the metal sheet is compressed, causing elastic deformation and continuous bending of the metal sheet. Both ends of the metal sheet are fixedly connected. Treating the metal sheet as a slender rod, according to Euler's formula... E: Elastic modulus of the material (reflecting the elastic properties of the material); I: Moment of inertia of the cross-section of the column about the neutral axis (reflecting the bending capacity of the section, taken as the minimum value, since the column always buckles about the axis with the minimum moment of inertia); L: Length of the column; μ: Length coefficient (related to the end constraints of the column, reflecting the degree to which the constraints limit instability). Calculate the critical pressure of the metal sheet. The critical stress during elastic instability satisfies (where A is the cross-sectional area, (This refers to the material's proportional limit). When the pressure increases to a critical value, the metal sheet exhibits elastic instability, with increased deflection but unchanged stress. The deflection is controlled within the elastic deformation range to prevent yielding and maintain the elastically unstable state. At this point, the metal sheet bends, pressing outward against the outer baffle, which in turn presses the outer ring. Simultaneously, the diamond-shaped structure presses inward against the inner baffle, which in turn presses the inner ring. Both the inner and outer rings are made of 316L austenitic stainless steel and are sufficiently thin. Under internal compression, the insulation ring expands, ensuring it fits tightly against the outer surface and that there are no gaps between the insulation ring and the housing and connecting rod. This solves the problem of small gaps left during assembly affecting insulation performance. Furthermore, compared to traditional spring-preloaded devices, this device has the advantage of keeping the metal sheet continuously in an elastically unstable state, maintaining a high and unchanging critical stress value. Spring deformation, on the other hand, causes stress changes, affecting device performance.

[0015] Aerogel composite cotton is filled into the empty space inside the insulation cavity and the sealing cavity for insulation.

[0016] By controlling the density of the aerogel composite cotton, it can be made not to affect the normal operation of the internal devices, while also enhancing the heat preservation effect.

[0017] When used in an environment temperature simulation of -60℃ to 200℃, a silicone rubber air ring is installed inside the insulation cavity. An inflation valve is installed through the upper sealing plate and connects the silicone rubber air ring. After installation, inflation causes the silicone rubber air ring to expand and make tight contact with the inner ring. The outer ring, inner ring, upper sealing plate, and ultra-thin insulation ring are all made of polytetrafluoroethylene.

[0018] Within the temperature range of -60℃ to 200℃, the required temperature maintenance function is relatively weak. Therefore, it is only necessary to ensure that the gas in the test chamber does not escape during the test and that the gas inside and outside does not exchange. This ensures that the temperature of the test chamber remains constant. Therefore, the filling material of the insulation chamber is replaced with a silicone rubber gas ring with better sealing performance. After installation, it is inflated and sealed. On the one hand, it is easier to install and disassemble, simplifying the structure and reducing production costs. On the other hand, it can provide good sealing performance after inflation and can also achieve static friction with the inner ring when the connecting rod drives the inner ring to move.

[0019] When used in an environment temperature simulation of -60℃ to 200℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition. The partition is fixedly connected to the inner side of the outer ring and abuts against the outer side of the inner ring. Both the partition and the upper sealing plate are provided with longitudinally placed guide grooves with corresponding positions. At least two longitudinally placed guide grooves are evenly distributed along the inner circumference of the insulation cavity. At least one push plate is provided between the longitudinally placed guide grooves of the upper sealing plate and the partition and is slidably connected in the same longitudinally placed guide groove. A silicone rubber air ring is provided between the push plate and the outer ring. An inflation valve is provided through the upper sealing plate and the silicone rubber air ring. Rock wool is provided between the push plate and the inner ring and surrounds the inner ring. After installation, inflation causes the silicone rubber air ring to expand and exert pressure on the rock wool. The outer ring, inner ring, upper sealing plate, partition, push plate and ultra-thin insulation ring are all made of polytetrafluoroethylene.

[0020] To further improve the insulation effect while ensuring airtightness, the power source for pushing the push plate will be replaced with a silicone rubber air ring, compared to other temperature range designs. This firstly reduces manufacturing costs and makes the operation more convenient, and secondly, it ensures that the physical properties do not change within this temperature range.

[0021] When used in an environment temperature simulation of 200℃~1000℃, the insulation cavity is filled with rock wool, and the outer ring, inner ring, upper sealing plate, and ultra-thin insulation ring are all made of 310S stainless steel.

[0022] To adapt to high-temperature environment simulation, the main structure of the movable sealing ring is made of metal. At the same time, by setting the thickness, the elasticity of the ultra-thin heat insulation ring and the slight elastic deformation of the upper sealing plate are achieved. During the experiment, the inner ring and the upper sealing plate are in contact and fit together, and static friction is maintained throughout the operation. In this way, when all are made of metal materials, there will be no obvious temperature change, ensuring the stability of the internal temperature of the test chamber.

[0023] When applied to simulate an ambient temperature of 200℃~1000℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition. The partition is fixedly connected to the inner side of the outer ring and abuts against the outer side of the inner ring. Both the partition and the upper sealing plate are provided with longitudinal guide grooves with corresponding positions. The longitudinal guide grooves are evenly distributed along the inner circumference of the insulation cavity.

[0024] Two push plates, one near the outer ring and the other near the inner ring, are slidably arranged along the longitudinal guide groove. A telescopic assembly is provided between the two push plates. The telescopic assembly includes a telescopic mechanism with each telescopic unit being rhomboid and hinged to each other. The telescopic units are hinged end to end and spaced apart to allow for deformation. A support leg is provided at the hinge of two adjacent telescopic units. The support leg is slidably arranged in a transverse guide groove opened on the partition plate. The hinge of any telescopic unit near the inner push plate abuts against the inner push plate, and the hinge of any telescopic unit near the outer push plate is fixedly connected to the outer push plate by a fixedly arranged bent metal sheet.

[0025] A limiting ring is provided in the middle of the support leg, and PE braided wire is arranged around the lower side of the limiting ring of two adjacent support legs. The PE braided wire passes through a small hole in the upper cover. By pulling the PE braided wire, the two support legs are controlled to move inward, thus controlling the change of the telescopic structure. The outer ring, inner ring, upper cover plate, partition plate, push plate, telescopic component and ultra-thin heat preservation ring are all made of 310S stainless steel.

[0026] In order to achieve the thermal insulation performance during high-temperature environment simulation, the power to push the push plate is set as a telescopic component, and the material selection is more suitable for high-temperature environment simulation.

[0027] The height of the inner ring is greater than the height of the outer ring. The upper sealing plate and the side near the inner ring abut against and fit against the outer wall of the inner ring. The distance that the inner ring extends to either the upper or lower side is greater than the maximum stroke of the upper sealing plate or the adjustment on the outer wall of the inner ring.

[0028] To ensure that the upper sealing plate, partition, and inner ring are always in contact, the height of the inner ring is set to be greater so that when a larger volume of test sample is used, it can also achieve contact and fit with the inner ring.

[0029] It also includes a first heat exchange barrier and a second heat exchange barrier with the same structure and installed on the outside of the connecting rod in the same way as the movable sealing ring; the first heat exchange barrier is located near one end of the box and spaced apart from the outer side of the box, and the second heat exchange barrier is spaced more than 20cm apart from the first heat exchange barrier.

[0030] Any first or second heat exchange barrier includes a housing fixedly connected to a connecting rod, and a medium inlet and a medium outlet penetrating the housing.

[0031] When simulating an environment ranging from -260℃ to -60℃, the contact surface between the lower first heat exchange barrier and the connecting rod is covered with thermally conductive aluminum (nickel-plated). Low-temperature nitrogen is continuously pumped into the first heat exchange barrier and continuously discharged through the outlet, ensuring a constant internal temperature and thus keeping the overall temperature of the connecting rod low. The upper second heat exchange barrier has the same structure as the first, but it is filled with room-temperature water, also continuously pumped in and out, maintaining room temperature for this part of the connecting rod. Under the action of the two heat exchange barriers, the overall temperature of the connecting rod is as follows: the part above the second heat exchange barrier is at room temperature, while the part below the first heat exchange barrier remains at a low temperature. The two heat exchange barriers are spaced at least 20cm apart, providing ample space to ensure that the mutual influence between the two sets of heat exchange barriers is minimal and negligible. Various sensors are installed on the upper connecting rod of the second heat exchange barrier. The second heat exchange barrier maintains a normal temperature, preventing the sensors from being damaged by the low temperature generated by the first heat exchange barrier.

[0032] When applied to simulated environments ranging from -60°C to 200°C, room temperature water is introduced into the second heat exchange barrier, while high temperature water is introduced into the first heat exchange barrier, maintaining a minimum temperature difference from the test temperature.

[0033] When applied to simulate an environment ranging from 200°C to 1000°C, the first heat exchange barrier does not work, and room temperature water is introduced into the second heat exchange barrier.

[0034] Beneficial Effects: This invention maintains the temperature inside the environmental simulation chamber by setting a movable sealing ring between the connecting rod and the sleeve. The upper and lower cavities respectively provide heat preservation and insulation. Multiple ultra-thin insulation rings are set inside the sealed cavity, with an interference fit between the ultra-thin insulation rings and the inner ring surface. When fatigue testing of the test object is carried out, the multi-layer ultra-thin insulation ring structure can effectively ensure airtightness, preventing external air from exchanging gas with the test cavity when the connecting rod moves, thus avoiding the influence of the ambient temperature inside the test cavity. The upper insulation cavity achieves a good temperature insulation effect. By setting a first heat exchange barrier and a second heat exchange barrier, in conjunction with the movable sealing ring, the influence of external temperature on the temperature inside the environmental simulation device can be effectively reduced, ensuring the accuracy of the experiment. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1This is a schematic diagram of the heat exchange barrier assembly of the present invention installed on the connecting rod.

[0037] Figure 2 This is a schematic diagram of the internal structure of the movable sealing ring when the present invention is applied to an extremely low temperature environment simulation.

[0038] Figure 3 This is a schematic diagram of the internal structure of the movable sealing ring when the present invention is applied to an extremely low temperature environment simulation, which hides the lower sealing cavity and the inner ring, outer ring and sealing plate.

[0039] Figure 4 This is a schematic diagram of the internal structure of the movable sealing ring when the present invention is applied to a normal temperature environment simulation. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] like Figure 1 and 2As shown, a heat exchange barrier assembly for an environmental simulation chamber includes a movable sealing ring 1. The movable sealing ring 1 includes an outer ring 11 and an inner ring 12. The outer ring 11 and the inner ring 12 are connected on their upper and lower sides by an upper sealing plate 13. The upper sealing plate 13 is fixedly connected to the outer ring 11 on the side closer to the outer ring 11 and abuts against the inner ring 12 on the side closer to the inner ring 12. The outer ring 11 is tightly fitted to the inner wall of the sleeve on which the sealing ring is installed. The inner ring 12 is fixedly connected to a connecting rod.

[0044] The cavity formed by the outer ring 11, inner ring 12, and upper sealing plate 13 is divided into an upper insulation cavity and a lower sealing cavity. The insulation cavity is filled with insulation material, and the sealing cavity is provided with at least two parallel ultra-thin insulation rings 14. The thickness of the ultra-thin insulation rings 14 is set to be less than 0.1 mm. The side of the ultra-thin insulation ring 14 near the outer ring 11 is fixedly connected to the outer ring 11, and the side near the inner ring 12 is interference-fitted with the inner ring 12. When the inner ring 12 is driven up and down by the connecting rod, there is static friction between the ultra-thin insulation ring 14 and the inner ring 12.

[0045] This invention achieves temperature maintenance within the environmental simulation chamber by setting a movable sealing ring 1 between the connecting rod and the sleeve. The upper and lower cavities respectively provide insulation and isolation functions. Multiple ultra-thin insulation rings 14 are set inside the sealed cavity. The ultra-thin insulation rings 14 are interference-fitted with the inner ring 12 and are in a slightly bent state in the initial state. When fatigue testing of the test object is performed, the connecting rod moves with a stroke of less than 1 mm under the drive of the fatigue testing machine. The ultra-thin insulation rings 14 and the inner ring 12 are in static friction. During the process, the ultra-thin insulation rings 14 always remain in close contact with the inner ring 12. The multi-layer ultra-thin insulation ring 14 structure can effectively ensure airtightness and prevent gas exchange between the outside air and the test chamber when the connecting rod moves, thus avoiding the influence of the ambient temperature inside the test chamber. The upper insulation cavity achieves a good temperature isolation effect, preventing the temperature difference between the internal and external temperatures from affecting the temperature of the test chamber. Ultimately, the temperature of the environmental simulation chamber is kept constant.

[0046] When used in an environment temperature simulation of -270℃ to 200℃, the insulation cavity is filled with aerogel composite insulation cotton, and the outer ring 11, inner ring 12, upper sealing plate 13, and ultra-thin insulation ring 14 are all made of polytetrafluoroethylene.

[0047] By using aerogel composite insulation cotton as the insulation material to fill the insulation cavity, the insulation material is suitable for temperatures ranging from -270℃ to 200℃ and remains unaffected during long-term use, ensuring continuous temperature insulation. The remaining materials are made of polytetrafluoroethylene, which also has good physical property stability within the temperature range of -270℃ to 200℃. This not only achieves temperature insulation but also has a certain degree of elastic deformation capability, resulting in good airtightness.

[0048] like Figure 2 and 3 As shown, when applied to simulate an ambient temperature of -270℃ to -60℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition 15. The partition 15 is fixedly connected to the inner side of the outer ring 11 and abuts against the outer side of the inner ring 12. Both the partition 15 and the upper sealing plate 13 are provided with longitudinally placed guide grooves 16 with corresponding positions. The longitudinally placed guide grooves 16 are evenly distributed along the inner circumferential direction of the insulation cavity.

[0049] Two push plates 17 are slidably arranged along the longitudinal guide groove 16, respectively close to the outer ring 11 and the inner ring 12. A telescopic assembly is arranged between the two push plates 17. The telescopic assembly includes a telescopic mechanism 18 that is hinged to each other and whose individual telescopic units are rhomboid. The telescopic units are hinged end to end and spaced apart at the beginning and end to allow for deformation. A support leg 19 is provided at the hinge of two adjacent telescopic units. The support leg 19 is slidably arranged in the transverse guide groove 110 opened on the partition plate 15. The hinge of any telescopic unit on the side of the push plate 17 closest to the inner side abuts against the inner push plate 17, and the hinge on the side of the push plate 17 closest to the outer side is fixedly connected to the outer push plate 17 by a fixedly arranged bent metal piece 111.

[0050] A limiting ring 112 is provided in the middle of the support leg 19. PE braided wire is arranged around the lower side of the limiting ring 112 of two adjacent support legs 19. The PE braided wire passes through a small hole in the upper cover. By pulling the PE braided wire, the two support legs 19 are controlled to move inward, thereby controlling the change of the telescopic structure.

[0051] To ensure that the upper and lower cavities do not interfere with each other, a partition 15 is installed to separate the upper and lower cavities, providing a mounting base for the push plate 17. When the annular structure contracts, the overall circumference of the annular structure decreases, the rhombus changes from a slender shape to a short and thick shape, and the spacing between the legs 19 decreases. At this time, the distance between the two ends of each rhombus increases, and the outer end of the metal plate 111 is compressed, causing elastic deformation and continuous bending of the metal plate 111. Both ends of the metal plate 111 are fixedly connected. Considering the metal plate 111 as a slender rod, according to Euler's formula... E: The elastic modulus of the material reflects its elastic properties; I: The moment of inertia of the cross-section of the compression member about the neutral axis reflects the bending capacity of the section, and is taken as the minimum value, since the compression member always buckles about the axis with the minimum moment of inertia; L: The length of the compression member; μ: The length coefficient is related to the end constraint conditions of the member and reflects the degree to which the constraint restricts instability. The critical pressure of metal sheet 111 is calculated. The critical stress during elastic instability satisfies Where A is the cross-sectional area. As the material's proportional limit, when the pressure increases to a critical value, the metal sheet 111 exhibits elastic instability, with increased deflection but unchanged stress. The deflection is controlled within the elastic deformation range to prevent yielding and maintain the elastically unstable state. At this point, the metal sheet 111 bends, pressing outward against the outer baffle, which in turn presses the outer ring 11. Simultaneously, the rhomboid structure presses inward against the inner baffle, which in turn presses the inner ring 12. Both the inner and outer rings 11 are made of 316L austenitic stainless steel and are sufficiently thin. Under internal compression, the insulation ring exhibits an overall expansion tendency, causing it to fit tightly against the outer surface, ensuring seamless contact between the insulation ring and the housing and connecting rod. This solves the problem of small gaps left during assembly affecting insulation performance. Furthermore, compared to traditional spring pre-tensioning devices, this device has the advantage that the metal sheet 111 remains in an elastically unstable state, consistently maintaining a high and unchanging critical stress value. Spring deformation, on the other hand, causes stress changes, affecting device performance.

[0052] Aerogel composite cotton is filled into the empty space inside the insulation cavity and the sealing cavity for insulation.

[0053] By controlling the density of the aerogel composite cotton, it can be made not to affect the normal operation of the internal devices, while also enhancing the heat preservation effect.

[0054] When used in an environment temperature simulation of -60℃ to 200℃, a silicone rubber air ring 113 is installed inside the insulation cavity. An inflation valve is installed through the upper sealing plate 13 and communicates with the silicone rubber air ring 113. After installation, inflation causes the silicone rubber air ring 113 to expand and make tight contact with the inner ring 12. The outer ring 11, inner ring 12, upper sealing plate 13, and ultra-thin insulation ring 14 are all made of polytetrafluoroethylene.

[0055] like Figure 4 As shown, within the temperature range of -60℃ to 200℃, the required temperature maintenance function is relatively weak. Therefore, it is only necessary to ensure that the gas in the test chamber does not escape during the test and that the gas inside and outside does not exchange. This ensures that the temperature of the test chamber remains constant. Therefore, the filling material of the insulation chamber is replaced with a silicone rubber air ring 113 with better sealing performance. After installation, it is inflated and sealed. On the one hand, it is easier to install and disassemble, simplifying the structure and reducing production costs. On the other hand, it can provide good sealing performance after inflation. When the connecting rod drives the inner ring 12 to move, it can also achieve static friction with the inner ring 12.

[0056] When used in an ambient temperature simulation of -60℃ to 200℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition 15. The partition 15 is fixedly connected to the inner side of the outer ring 11 and abuts against the outer side of the inner ring 12. Both the partition 15 and the upper sealing plate 13 are provided with corresponding longitudinal guide grooves 16. At least two longitudinal guide grooves 16 are evenly distributed along the inner circumference of the insulation cavity. The longitudinal guide grooves 16 of the upper sealing plate 13 and the partition 15 are provided in the same longitudinal guide groove. At least one push plate 17 is slidably connected within the inner ring 16. A silicone rubber air ring 113 is provided between the push plate 17 and the outer ring 11. An inflation valve is provided through the upper sealing plate 13 and communicating with the silicone rubber air ring 113. Rock wool is provided between the push plate 17 and the inner ring 12 and surrounds the inner ring 12. After installation, inflation causes the silicone rubber air ring 113 to expand and exert pressure on the rock wool. The outer ring 11, inner ring 12, upper sealing plate 13, partition 15, push plate 17 and ultra-thin insulation ring 14 are all made of polytetrafluoroethylene.

[0057] To further improve the insulation effect while ensuring airtightness, the power source for pushing the push plate 17 is replaced with a silicone rubber air ring 113, compared to other temperature range designs. This firstly reduces manufacturing costs and makes the operation more convenient, and secondly, it ensures that the physical properties do not change within this temperature range.

[0058] When applied to simulate an ambient temperature of 200℃~1000℃, the insulation cavity is filled with rock wool, and the outer ring 11, inner ring 12, upper sealing plate 13, and ultra-thin insulation ring 14 are all made of 310S stainless steel.

[0059] To adapt to high-temperature environment simulation, the main structure of the movable sealing ring 1 is made of metal. At the same time, by setting the thickness, the elasticity of the ultra-thin heat insulation ring 14 and the slight elastic deformation of the upper sealing plate 13 are achieved. During the experiment, the inner ring 12 and the upper sealing plate 13 are in contact and fit together. Static friction is maintained throughout the operation. In this way, when both are made of metal, there will be no obvious temperature change, ensuring the stability of the internal temperature of the test chamber.

[0060] When applied to simulate an ambient temperature of 200℃~1000℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition 15. The partition 15 is fixedly connected to the inner side of the outer ring 11 and abuts against the outer side of the inner ring 12. Both the partition 15 and the upper sealing plate 13 are provided with longitudinally placed guide grooves 16 with corresponding positions. The longitudinally placed guide grooves 16 are evenly distributed along the inner circumferential direction of the insulation cavity.

[0061] Two push plates 17 are slidably arranged along the longitudinal guide groove 16, respectively close to the outer ring 11 and the inner ring 12. A telescopic assembly is arranged between the two push plates 17. The telescopic assembly includes a telescopic mechanism 18 that is hinged to each other and whose individual telescopic units are rhomboid. The telescopic units are hinged end to end and spaced apart at the beginning and end to allow for deformation. A support leg 19 is provided at the hinge of two adjacent telescopic units. The support leg 19 is slidably arranged in the transverse guide groove 110 opened on the partition plate 15. The hinge of any telescopic unit on the side of the push plate 17 closest to the inner side abuts against the inner push plate 17, and the hinge on the side of the push plate 17 closest to the outer side is fixedly connected to the outer push plate 17 by a fixedly arranged bent metal piece 111.

[0062] A limiting ring 112 is provided in the middle of the support leg 19. PE braided wire is arranged around the lower side of the limiting ring 112 of two adjacent support legs 19. The PE braided wire passes through a small hole in the upper cover. Pulling the PE braided wire controls the two support legs 19 to move inward, controlling the change of the telescopic structure. The outer ring 11, inner ring 12, upper cover plate 13, partition plate 15, push plate 17, telescopic component, and ultra-thin heat insulation ring 14 are all made of 310S stainless steel.

[0063] In order to achieve thermal insulation performance during high-temperature environment simulation, the power to push the push plate 17 is set as a telescopic component, and the material selection is more suitable for high-temperature environment simulation.

[0064] The height of the inner ring 12 is greater than the height of the outer ring 11. The upper sealing plate 13 and the side near the inner ring 12 abut against and fit against the outer wall of the inner ring 12. The distance that the inner ring 12 extends to either the upper or lower side is greater than the maximum stroke of the upper sealing plate 13 or the adjustment on the outer wall of the inner ring 12.

[0065] To ensure that the upper sealing plate 13, the partition plate 15, and the inner ring 12 are always in contact, the height of the inner ring 12 is set to be larger so that when a larger volume of test sample is applied, it can also achieve contact and fit with the inner ring 12.

[0066] It also includes a first heat exchange barrier 2 and a second heat exchange barrier 3 with the same structure and installed on the outside of the connecting rod, just like the movable sealing ring 1; the first heat exchange barrier 2 is located near one end of the box and spaced apart from the outer side of the box, and the second heat exchange barrier 3 is spaced more than 20cm apart from the first heat exchange barrier 2.

[0067] Any first heat exchange barrier 2 or second heat exchange barrier 3 includes a housing 4 fixedly connected to a connecting rod, and a medium inlet 5 and a medium outlet 6 penetrating the housing 4.

[0068] When simulating an environment ranging from -260℃ to -60℃, the contact surface between the lower first heat exchange barrier 2 and the connecting rod is covered with a thermally conductive aluminum-plated nickel material. Low-temperature nitrogen is continuously supplied to the first heat exchange barrier 2 and continuously discharged through the outlet, ensuring a constant internal temperature and thus keeping the overall temperature of the connecting rod low. The upper second heat exchange barrier 3 has the same structure as the first heat exchange barrier 2, but it is filled with room-temperature water, also continuously supplied and discharged, maintaining room temperature for this part of the connecting rod. Under the action of the two heat exchange barriers, the overall temperature of the connecting rod is as follows: the part above the second heat exchange barrier 3 is at room temperature, while the part below the first heat exchange barrier 2 remains at a low temperature. The two heat exchange barriers are separated by more than 20cm, leaving sufficient space to ensure that the mutual influence between the two sets of heat exchange barriers is minimal and negligible. Various sensors are installed on the upper part of the connecting rod of the second heat exchange barrier 3. The second heat exchange barrier 3 maintains a normal temperature and will not damage the sensors due to the low temperature formed by the first heat exchange barrier 2.

[0069] When applied to simulated environments ranging from -60°C to 200°C, room temperature water is introduced into the second heat exchange barrier, while high temperature water is introduced into the first heat exchange barrier, maintaining a minimum temperature difference from the test temperature.

[0070] When applied to simulate an environment ranging from 200°C to 1000°C, the first heat exchange barrier does not work, and room temperature water is introduced into the second heat exchange barrier.

[0071] When applied to simulate extremely low temperature environments, i.e. -270℃ to -60℃, the gaps between the ultra-thin insulation rings are filled with aerogel composite insulation cotton.

[0072] When applied in a normal temperature environment simulation, i.e. -60℃ to 200℃, the gaps between the ultra-thin insulation rings are filled with rock wool;

[0073] When used in high-temperature environment simulation, i.e., 200℃~1000℃, the gaps between the ultra-thin insulation rings are filled with rock wool.

[0074] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0075] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat exchange barrier assembly for an environmental simulation chamber, characterized in that: Includes a movable sealing ring (1), the movable sealing ring (1) includes an outer ring (11) and an inner ring (12), the outer ring (11) and the inner ring (12) are connected on the upper and lower sides by an upper sealing plate (13), the upper sealing plate (13) is fixedly connected to the outer ring (11) on the side near the outer ring (11), and abuts against the inner ring (12) on the side near the inner ring (12), the outer ring (11) is tightly fitted to the inner wall of the sleeve on which the sealing ring is installed, and the inner ring (12) is fixedly connected to the connecting rod; The cavity formed by the outer ring (11), inner ring (12), and upper sealing plate (13) is divided into an upper insulation cavity and a lower sealing cavity. The insulation cavity is filled with insulation material, and at least two parallel ultra-thin insulation rings (14) are provided in the sealing cavity. The thickness of the ultra-thin insulation rings (14) is less than 0.1 mm. The ultra-thin insulation rings (14) are fixedly connected to the outer ring (11) on the side closer to the outer ring (11) and are press-fitted to the inner ring (12) on the side closer to the inner ring (12). When the inner ring (12) is driven up and down by the connecting rod, there is static friction between the ultra-thin insulation rings (14) and the inner ring (12).

2. The heat exchange barrier assembly for an environmental simulation chamber according to claim 1, characterized in that: When applied to simulate an ambient temperature of -270℃ to 200℃, the insulation cavity is filled with aerogel composite insulation cotton, and the outer ring (11), inner ring (12), upper sealing plate (13), and ultra-thin insulation ring (14) are all made of polytetrafluoroethylene.

3. The heat exchange barrier assembly for an environmental simulation chamber according to claim 1, characterized in that: When applied to simulate an ambient temperature of -270℃ to -60℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition (15). The partition (15) is fixedly connected to the inner side of the outer ring (11) and abuts against the outer side of the inner ring (12). Both the partition (15) and the upper sealing plate (13) are provided with longitudinal guide grooves (16) with corresponding positions. The longitudinal guide grooves (16) are evenly distributed along the inner circumferential direction of the insulation cavity. Two push plates (17) are slidably arranged along the longitudinal guide groove (16) near the outer ring (11) and the inner ring (12) respectively. A telescopic assembly is arranged between the two push plates (17). The telescopic assembly includes a telescopic mechanism (18) that is hinged to each other and has a rhomboid shape for each telescopic unit. The telescopic unit is hinged at both ends and spaced apart between the first end and the last end, leaving room for deformation. A support leg (19) is provided at the hinge of two adjacent telescopic units. The support leg (19) is slidably arranged in a horizontal guide groove (110) opened on the partition plate (15). The hinge of any telescopic unit near the inner push plate (17) abuts against the inner push plate (17), and the hinge of the push plate (17) near the outer push plate (17) is fixedly connected to the outer push plate (17) by a fixedly arranged bent metal piece (111). A limiting ring (112) is provided in the middle of the leg (19). PE braided wires are arranged around the lower side of the limiting rings (112) of two adjacent legs (19). The PE braided wires pass through the small hole through the upper cover. By pulling the PE braided wires, the two legs (19) are controlled to move inward, thereby controlling the change of the telescopic structure.

4. The heat exchange barrier assembly for an environmental simulation chamber according to claim 3, characterized in that: Aerogel composite cotton is filled into the empty space inside the insulation cavity and the sealing cavity for insulation.

5. The heat exchange barrier assembly for an environmental simulation chamber according to claim 1, characterized in that: When used in an environment temperature simulation of -60℃ to 200℃, a silicone rubber air ring (113) is installed in the insulation cavity. An air valve is installed through the upper sealing plate (13) and communicates with the silicone rubber air ring (113). After installation, the silicone rubber air ring (113) is inflated to make it tightly contact the inner ring (12). The outer ring (11), inner ring (12), upper sealing plate (13), and ultra-thin insulation ring (14) are all made of polytetrafluoroethylene.

6. The heat exchange barrier assembly for an environmental simulation chamber according to claim 1, characterized in that: When applied to simulate an ambient temperature of -60℃ to 200℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition (15). The partition (15) is fixedly connected to the inner side of the outer ring (11) and abuts against the outer side of the inner ring (12). Both the partition (15) and the upper sealing plate (13) are provided with corresponding longitudinal guide grooves (16). At least two longitudinal guide grooves (16) are evenly distributed along the inner circumference of the insulation cavity. The longitudinal guide grooves (16) of the upper sealing plate (13) and the partition (15) are provided with a sliding mechanism within the same longitudinal guide groove (16). At least one push plate (17) is dynamically connected. A silicone rubber air ring (113) is provided between the push plate (17) and the outer ring (11). An air valve is connected through the upper sealing plate (13) and the silicone rubber air ring (113). Rock wool is provided between the push plate (17) and the inner ring (12) and surrounds the inner ring (12). After installation, air is inflated to make the silicone rubber air ring (113) expand and exert pressure on the rock wool. The outer ring (11), inner ring (12), upper sealing plate (13), partition (15), push plate (17) and ultra-thin insulation ring (14) are all made of polytetrafluoroethylene.

7. The heat exchange barrier assembly for an environmental simulation chamber according to claim 1, characterized in that: When applied to simulate an ambient temperature of 200℃~1000℃, the insulation cavity is filled with rock wool, and the outer ring (11), inner ring (12), upper sealing plate (13), and ultra-thin insulation ring (14) are all made of 310S stainless steel.

8. The heat exchange barrier assembly for an environmental simulation chamber according to claim 1, characterized in that: When applied to simulate an ambient temperature of 200℃~1000℃, the insulation cavity and the sealing cavity are separated into two independent cavities by a partition (15). The partition (15) is fixedly connected to the inner side of the outer ring (11) and abuts against the outer side of the inner ring (12). Both the partition (15) and the upper sealing plate (13) are provided with longitudinal guide grooves (16) with corresponding positions. The longitudinal guide grooves (16) are evenly distributed along the inner circumferential direction of the insulation cavity. Two push plates (17) are slidably arranged along the longitudinal guide groove (16) near the outer ring (11) and the inner ring (12) respectively. A telescopic assembly is arranged between the two push plates (17). The telescopic assembly includes a telescopic mechanism (18) that is hinged to each other and has a rhomboid shape for each telescopic unit. The telescopic unit is hinged at both ends and spaced apart between the first end and the last end, leaving room for deformation. A support leg (19) is provided at the hinge of two adjacent telescopic units. The support leg (19) is slidably arranged in a horizontal guide groove (110) opened on the partition plate (15). The hinge of any telescopic unit near the inner push plate (17) abuts against the inner push plate (17), and the hinge of the push plate (17) near the outer push plate (17) is fixedly connected to the outer push plate (17) by a fixedly arranged bent metal piece (111). The support leg (19) is provided with a limiting ring (112) in the middle. The lower side of the limiting ring (112) of two adjacent support legs (19) is surrounded by PE braided wire. The PE braided wire passes through the small hole of the upper cover. By pulling the PE braided wire, the two support legs (19) are controlled to move inward, and the telescopic structure is controlled to change. The outer ring (11), inner ring (12), upper cover plate (13), partition plate (15), push plate (17), telescopic component and ultra-thin heat preservation ring (14) are all made of 310S stainless steel.

9. The heat exchange barrier assembly for an environmental simulation chamber according to any one of claims 2 to 8, characterized in that: The height of the inner ring (12) is greater than the height of the outer ring (11). The upper sealing plate (13) and the side near the inner ring (12) abut against the outer wall of the inner ring (12). The distance that the inner ring (12) extends to either the upper or lower side is greater than the maximum stroke of the upper sealing plate (13) or the adjustment on the outer wall of the inner ring (12).

10. The heat exchange barrier assembly for an environmental simulation chamber according to any one of claims 2 or 8, characterized in that: It also includes a first heat exchange barrier (2) and a second heat exchange barrier (3) with the same structure as the movable sealing ring (1) installed on the outside of the connecting rod; the first heat exchange barrier (2) is located near one end of the box and spaced apart from the outer side of the box, and the second heat exchange barrier (3) is spaced more than 20cm apart from the first heat exchange barrier (2). Any first heat exchange barrier (2) or second heat exchange barrier (3) includes a housing (4) fixedly connected to the connecting rod and a medium inlet (5) and a medium outlet (6) penetrating the housing (4).

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