Ultrahigh-temperature CT (Computed Tomography) in-situ mechanical test device suitable for various environments

Abstract

The invention relates to the technical field of mechanical experiments, and discloses an ultrahigh-temperature CT (Computed Tomography) in-situ mechanical test device suitable for various environments, which comprises a CT motion platform, an ultrahigh-temperature mechanical test device, an electrical control system and an inflation vacuum system, the device can be compatible with ultrahigh-temperature rotating electric heating of X-ray CT, extreme force-thermal working condition coupling loading, material internal deformation field and damage defect microscopic imaging, construction of an ultrahigh-temperature mechanical property numerical model based on damage defects and the like, and a spatial topological structure layout is designed.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical experiments, and in particular to an ultra-high temperature CT in-situ mechanical testing device suitable for use in a variety of environments. Background Art

[0002] Ultra-high temperature CT in-situ mechanical testing is a test technique designed to study the mechanical properties and behavior of materials under high temperature conditions. This test usually combines computer tomography (CT scanning) technology with mechanical testing equipment to observe the internal microstructure and deformation behavior of the material in real time. In recent years, researchers at home and abroad have deeply combined high-temperature mechanical load loading devices with synchrotron radiation light sources, realizing online three-dimensional characterization of the internal defect evolution process of advanced materials and structures under a high-temperature environment of 1800°C, revealing the evolution mechanism of internal defect damage.

[0003] However, in actual use, there is still a knowledge blind spot about the mapping law between the macroscopic stress of materials and their internal microstructure and its evolution process. Ultra-high temperature materials, especially fiber-reinforced composite materials, often produce complex internal damage defects during extreme service. Traditional high temperature material mechanical property tests and non-destructive testing technologies can no longer support the study of the internal organizational evolution of ultra-high temperature materials, which seriously restricts the development and application of high-performance ultra-high temperature materials. In view of this, we propose an ultra-high temperature CT in-situ mechanical test device suitable for a variety of environments. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides an ultra-high temperature CT in-situ mechanical testing device suitable for a variety of environments, which solves the problem that traditional high-temperature material mechanical properties testing and non-destructive testing technologies can no longer support the study of the internal structure evolution of ultra-high temperature materials above 2000°C.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an ultra-high temperature CT in-situ mechanical testing device suitable for various environments, including a CT motion platform, an ultra-high temperature mechanical testing device, an electrical control system, and an inflation vacuum system.

[0006] Preferably, the ultra-high temperature mechanical testing device includes a base, a synchronous rotation control system, a hydraulic servo loading system, an anti-winding adaptive power-on module, an ultra-high temperature power-on heating mechanical load loading module, a column, a high-precision load measurement unit, and an upper crossbeam. One end of the column is fixedly installed on the upper end of the base, and the end of the column away from the base is fixedly connected to the upper crossbeam. The synchronous rotation control system is fixedly installed on the base and the upper crossbeam, and the lower end of the upper synchronous rotation control system is fixedly connected to the high-precision load measurement unit.

[0007] Preferably, the high-precision load measurement unit is fixedly connected to the internal connecting rod of the ultra-high temperature electric heating mechanical load loading module, the output shaft of the synchronous rotation control system at the lower end is fixedly connected to a hydraulic servo loading system, the anti-winding adaptive power-on module is symmetrically installed on the upper and lower sides of the column, an inert gas interface is fixedly installed on the outer side of the environmental simulation device, and the inert gas interface can provide corresponding inert gas according to test requirements, and the water cooling module is fixedly installed on the inner side of the environmental simulation device.

[0008] Preferably, the anti-winding adaptive power-on module includes a self-lubricating high-power power connection chuck, an insulating pad, a clamping block, a cable, and an automatic tightening mechanism. The clamping block is installed on a column, the insulating pad is installed on the clamping block, and the insulating pad is fixedly installed with an automatic tightening mechanism.

[0009] Preferably, the outer surface of the automatic tightening mechanism is in contact with the cable, and one end of the cable away from the automatic tightening mechanism is in contact with a self-lubricating high-power power connection chuck, and the other end of the self-lubricating high-power power connection chuck is in contact with the connecting rod of the ultra-high temperature electric heating mechanical load loading module.

[0010] Preferably, the ultra-high temperature electric heating mechanical load loading module includes a connecting disk, an insulating sheet, a connecting rod, a sealing device, a flange ring, a stretching and rotating composite sealing unit, a vacuum environment chamber, an upper pull rod, a chuck, a water joint, a sample, a lower pull rod, a water cooling module, and an inert gas interface. The connecting disk is fixedly connected to a hydraulic servo loading system, an insulating sheet is provided on the outer surface of the connecting disk, a connecting rod is fixedly connected to the upper end of the insulating sheet, one end of the sealing device is fixedly connected to the connecting rod, and the other end of the sealing device is fixedly connected to the lower pull rod. A stretching and rotating composite sealing unit is installed on the outside of the sealing device, a flange ring is fixedly installed on the lower end of the stretching and rotating composite sealing unit, and a vacuum environment chamber is fixedly installed on the upper end of the flange ring.

[0011] Preferably, the upper pull rod and the lower pull rod are fixedly connected to the upper and lower ends of the clamp respectively, and the upper end of the clamp is fixedly connected with a water joint, and the water joint is connected to the water cooling module.

[0012] Preferably, the electrical control system includes a heating system and a water cooling system. The water cooling system is composed of a cooling water pipeline, a water distributor and a chiller. Each water distributor has a water inlet and a water outlet. Two water distributors are connected to the chiller. A copper ball valve is reserved for each water interface of the water distribution. The water pipes leading out of the water distributor are connected to the ultra-high temperature environment device.

[0013] Preferably, the inflation vacuum system includes a mechanical pump, a vacuum stretching and rotating composite sealing unit, a high vacuum manual butterfly valve and a vacuum measuring instrument. The vacuum pipeline is divided into a front-stage pipeline and a rear-stage pipeline. One end of the front-stage vacuum pipeline is connected to the vacuum environment box, and one end of the rear-stage vacuum pipeline is connected to the mechanical pump outlet. The stretching and rotating composite sealing unit is between the two-stage vacuum pipelines. A high vacuum manual baffle valve is installed on the front-stage vacuum pipeline and the water-cooled vacuum environment box pipeline flange.

[0014] Preferably, the vacuum environment box is provided with an inert gas interface and a water cooling module.

[0015] Working principle: When the present invention is in use, the work flow of the test environment is set up through the electrical control system, and the test specimens and other tooling are installed. During this process, the vacuum environment box maintains the vacuum state or the protective gas state of the internal environment through the inflation vacuum system, and fills the box with a proper amount of inert gas through the inert gas interface to protect the stability of the sample at extreme temperatures and avoid oxidation of the sample at high temperatures.

[0016] The hydraulic servo loading system is driven by the synchronous rotation control system, so that the sample clamped by the ultra-high temperature electric heating mechanical load loading module is subjected to a small constant force to ensure that the sample is not damaged during the heating process. In this process, the high-precision load measurement unit measures and records the magnitude of the force on the sample in real time, and performs feedback control through the electrical control system. During the test, the upper and lower synchronous motors rotate synchronously, so that the sample can rotate one circle, compatible with ultra-high temperature electric heating and synchronous rotation functions, and output a 360° deformation image of the sample on the detector to ensure CT detection of the internal state of the sample. This patent is a heating method for the sample to self-heat. When the sample temperature in the vacuum environment box reaches the preset value, the ultra-high temperature mechanical testing device starts working. During the test, the X-ray source and detector on the CT motion platform perform CT scanning on the sample to obtain the internal structure and deformation information of the sample in real time. Through the control of the electrical control system, CT scanning and mechanical loading are carried out simultaneously, realizing a comprehensive study of the in-situ mechanical properties of materials in ultra-high temperature multi-field environments.

[0017] At the same time, the water cooling system starts to work, and cold water is introduced into the water cooling module through the cooling water pipeline to cool the vacuum environment box and the ultra-high temperature electric heating mechanical load loading module to ensure the stable operation of the test device in a high temperature environment. The water cooling module is connected to the water cooling module interface on the vacuum environment box to ensure the efficient transmission of the cooling effect.

[0018] In addition, the present invention also energizes the sample through an anti-winding adaptive energization module to simulate the electrical performance of ultra-high temperature materials in an actual working environment. The self-lubricating high-power electrical chuck contacts the connecting rod of the ultra-high temperature energized heating mechanical load loading module, and the current is introduced into the sample through the cable to realize the electrical performance test.

[0019] The present invention provides an ultra-high temperature CT in-situ mechanical testing device suitable for various environments, which has the following beneficial effects: 1) The present invention is compatible with ultra-high temperature rotating electric heating of X-ray CT, extreme force-heat working condition coupling loading, microscopic imaging of internal deformation field and damage defects of materials, and construction of ultra-high temperature mechanical properties numerical model based on damage defects, and designs a spatial topological structure layout.

[0020] 2) The electric heating method is combined with the internal insulation layer to achieve heating and insulation of the sample at a maximum temperature of 3000℃.

[0021] 3) The present invention is a full-field mechanical properties test and in-situ testing system for ultra-high temperature materials compatible with X-ray microscopy imaging 4) During the high-temperature mechanical property test at a maximum operating temperature of 3000°C, the synchronously rotating and loading integrated actuating execution unit can ensure that the mechanical structural parts have good static and dynamic characteristics, thereby guaranteeing the accuracy and reliability of the target instrument.

[0022] 5) The present invention can be used to study the spatial layout and integration method among a mechanical loading unit, an X-ray tomography unit, a sample synchronous rotation unit and an ultra-high temperature electrical thermal loading unit.

[0023] 6) The present invention is designed with an integrated interface solution for the mechanical loading module and other core modules, and has successfully developed an ultra-high temperature electric heating and rotation loading module, which can be used for module integration and debugging and calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 It is a schematic diagram of the CT motion platform of the present invention; Figure 3 It is a three-dimensional schematic diagram of the ultra-high temperature mechanical testing device of the present invention; Figure 4 It is a schematic plan view of the ultra-high temperature mechanical testing device of the present invention; Figure 5 It is a structural diagram and a cross-sectional view of the ultra-high temperature electric heating mechanical load loading module of the present invention.

[0025] Among them, 1. CT motion platform; 2. Ultra-high temperature mechanical testing device; 3. Electrical control system; 4. Inflatable vacuum system; 31. Heating system; 32. Water cooling system; 1.1. Horizontal beam; 1.2. Vertical beam; 1.3. Main engine motor; 1.4. Detector; 1.5. X-ray source; 1.6. Dust cover; 1.7. Single-axis drive; 1.8. Drag chain; 1.9. Drag chain bracket; 2.1. Base; 2.2. Synchronous rotation control system; 2.3. Hydraulic servo loading system; 2.4. Anti-winding adaptive power-on module; 2.5. Ultra-high temperature power-on heating mechanical load loading module; 2.6. Column; 2.7. High-precision load measurement unit; 2.8. Crossbeam; 2.9, environmental simulation device; 2.4.1, self-lubricating high-power power connection chuck; 2.4.2, insulating pad; 2.4.3, clamping block; 2.4.4, cable; 2.4.5, automatic tightening mechanism; 2.5.1, connecting plate; 2.5.2, insulating sheet; 2.5.3, connecting rod; 2.5.4, sealing device; 2.5.5, flange ring; 2.5.6, tensile rotating composite sealing unit; 2.5.7, vacuum environment chamber; 2.5.8, upper pull rod; 2.5.9, chuck; 2.5.10, water joint; 2.5.11, specimen; 2.5.12, lower pull rod; 2.5.13, water cooling module; 2.5.14, inert gas interface. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example: Please refer to the attached Figure 1 -Attached Figure 2 An embodiment of the present invention provides an ultra-high temperature CT in-situ mechanical testing device suitable for various environments, including a CT motion platform 1, an ultra-high temperature mechanical testing device 2, an electrical control system 3, and an inflation vacuum system 4.

[0028] Please refer to the attached Figure 3 -Attached Figure 4The ultra-high temperature mechanical test device 2 uses a frame structure and is fixedly mounted on the single-axis driver 1.7 of the horizontal beam 1.1 of the CT motion platform 1, and can adjust its position in the horizontal direction. It is mainly composed of a base 2.1, a synchronous rotation control system 2.2, a hydraulic servo loading system 2.3, an anti-winding adaptive power-on module 2.4, an ultra-high temperature power-on heating mechanical load loading module 2.5, a column 2.6, a high-precision load measurement unit 2.7, and an upper crossbeam 2.8. The base 2.1 is fixedly mounted on the single-axis driver 1.7, and one end of the column 2.6 is fixedly mounted on both sides of the base 2.1, and the other end is fixedly mounted on the upper crossbeam 2.8. The base 2.1 and the upper crossbeam 2.8 are respectively fixedly mounted with a synchronous rotation control system 2.2. During the test, the upper and lower synchronous rotation control systems 2.2 rotate synchronously, so that the sample 2.5.11 can rotate one circle, compatible with ultra-high temperature power-on heating and synchronous rotation functions, and output a 360° deformation image of the sample 2.5.11 on the detector 1.4. The upper synchronous rotation control system 2.2 is connected to the high-precision load measurement unit 2.7, and the high-precision load measurement unit 2.7 is fixedly connected to the connecting rod 2.5.3 of the ultra-high temperature electric heating mechanical load loading module 2.5. The high-precision load measurement unit 2.7 can measure the load on the sample 2.5.11 in real time during the test, and realize the closed-loop control of the output force value. The lower synchronous rotation control system 2.2 is connected to the hydraulic servo loading system 2.3, and the hydraulic servo loading system 2.3 constructs a complex mechanical stress loading environment of tension, compression, bending and torsion for the sample 2.5.11. An inert gas interface (2.5.14) is fixedly installed on the outer side of the environmental simulation device (2.9), and the inert gas interface (2.5.14) can provide corresponding inert gas according to the test requirements. The water cooling module (2.11) is fixedly installed on the inner side of the environmental simulation device (2.9).

[0029] The environmental simulation device 2.9 has a compact front-to-back distance, which solves the problem of unclear images and inaccurate data caused by the distance of the ray. The environmental simulation device 2.9 can provide a fully sealed test space for the sample and ensure the vacuum, protective gas, oxygen partial pressure and other environments required for the test. The environmental simulation device 2.9 has a stable water-cooling structure to ensure that ultra-high temperature has no temperature impact on the shell. An inert gas interface 2.10 is fixedly installed on the outside of the environmental simulation device 2.9. The inert gas interface 2.10 can provide the corresponding inert gas according to the test requirements. The water cooling module 2.11 is fixedly installed on the inside of the environmental simulation device 2.9 The water cooling module 2.11 is connected to the water joint 2.5.9. The connection between the water cooling module 2.11 and the water joint 2.5.9 can satisfy the active connection of the ultra-high temperature electric heating mechanical load loading module 2.5 for 180° circumferential rotation during the test. The rotating loading system is composed of the synchronous rotating control system 2.2 and the hydraulic servo loading system 2.3. The rotating loading system is the coupled loading of the circumferential rotation provided by the synchronous rotating control system 2.2 and the axial loading provided by the hydraulic servo loading system 2.3, thereby realizing the dynamic and full-process tomographic imaging and data processing of the material under extreme mechanical and thermal coupling conditions.

[0030] The anti-winding adaptive power-on module 2.4 is installed symmetrically on the upper and lower sides of the column 2.6, and is mainly composed of a self-lubricating high-power power connection chuck 2.4.1, an insulating pad 2.4.2, a clamp block 2.4.3, a cable 2.4.4, an automatic tightening mechanism 2.4.5, etc. The clamp block 2.4.3 is installed on the column 2.6, and the height can be adjusted up and down. The insulating pad 2.4.2 is fixedly installed on the clamp block 2.4.3, and the automatic tightening mechanism 2.4.5 is fixedly installed on the insulating pad 2.4.2. The automatic tightening mechanism 2.4.5 is used to fit the cable 2.4.4 to one end of the self-lubricating high-power power connection chuck 2.4.1, and the other end of the self-lubricating high-power power connection chuck 2.4.1 is in contact with the connecting rod 2.5.3 of the ultra-high temperature power heating mechanical load loading module 2.5. During the test, the current on the cable 2.4.4 is transmitted to the ultra-high temperature electrical heating mechanical load loading module 2.5 through the self-lubricating high-power electrical connection clamp 2.4.1 to achieve 3000℃ ultra-high temperature electrical heating of the sample 2.5.11.

[0031] Please refer to the attached Figure 5The ultra-high temperature electric heating mechanical load loading module 2.5 has a vertically symmetrical structure, and is mainly composed of a connection plate 2.5.1, an insulating sheet 2.5.2, a connecting rod 2.5.3, a sealing device 2.5.4, a flange ring 2.5.5, a tensile rotating composite sealing unit 2.5.6, a vacuum environment chamber 2.5.7, an upper pull rod 2.5.8, a chuck 2.5.9, a water joint 2.5.10, a sample 2.5.11, a lower pull rod 2.5.12, a water cooling module 2.5.13, an inert gas interface 2.5.14, etc. The connection plate 2.5.1 is connected to the hydraulic servo loading system 2.3, and the connection plate 2.5.1 is fixedly connected to the insulating sheet 2.5.2. The insulating sheet 2.5.2 is fixedly connected to the connecting rod 2.5.3, and the insulating sheet 2.5.2 can cut off the current on the anti-winding adaptive power module 2.4. One end of the sealing device 2.5.4 is connected to the connecting rod 2.5.3, and the other end is connected to the lower pull rod 2.5.12. A tensile rotation composite sealing unit 2.5.6 is installed outside the sealing device 2.5.4. The tensile rotation composite sealing unit 2.5.6 is fixedly installed on the flange ring 2.5.5. The tensile rotation composite sealing unit 2.5.6 is a flexible module that can meet the dynamic sealing of the ultra-high temperature electric heating mechanical load loading module 2.5 during the tensile rotation test, and has no effect on the data of the high-precision load measurement unit 2.7. The flange ring 2.5.5 is fixedly installed on the vacuum environment box 2.5.7, and the vacuum environment box 2.5.7 is provided with an inert gas interface 2.5.14 and a water cooling module 2.5.13.

[0032] The upper and lower pull rods 2.5.12 are fixedly connected to the chuck 2.5.9, respectively, and the sample 2.5.11 is fixed on the chuck 2.5.9. A water joint 2.5.10 is fixedly installed on the chuck 2.5.9, and the water joint 2.5.10 is connected to the water cooling module 2.5.13. The contact cooling of the ultra-high temperature electric heating mechanical load loading module 2.5 is realized by using the principle of circulating cooling of the cooling channel embedded in the fixture. The multi-stage cooling and shielding protection method is adopted to realize the thermal shielding protection of the key components of the instrument. An inert gas interface 2.5.14 is reserved on the vacuum environment box 2.5.7, which can be filled with gas according to the test requirements.

[0033] Please refer to the attached Figure 1The electrical control system 3 is a heating system 3.1 and a water cooling system 3.2. The heating and water cooling systems can be started or stopped by the switch. The water cooling system 3.2 is composed of cooling water pipelines, water distributors and chillers. The water distributor is installed on the vacuum chamber bracket. Each water distributor has 12 water inlets and 12 water outlets, and the two water distributors are connected to the chiller. A copper ball valve is reserved for each water interface of the water distributor. The water pipe leading out of the water distributor is connected to the ultra-high temperature environment device. The heating system is mainly controlled by sensing the temperature in the vacuum environment box 2.5.7 through a temperature sensor. The electric heating method is combined with the internal insulation layer of the vacuum environment box 2.5.7 to achieve heating and insulation of the sample at a maximum of 3000°C.

[0034] Please refer to the attached Figure 1 , the inflation vacuum system 4 is used to control the inflation pressure, including a mechanical pump, a vacuum stretching and rotating composite sealing unit, a high vacuum manual butterfly valve and a vacuum measuring instrument. The vacuum pipeline is divided into a front-stage pipeline and a rear-stage pipeline. One end of the front-stage vacuum pipeline is connected to the vacuum (inflation) environment box, and one end of the rear-stage vacuum pipeline is connected to the outlet of the mechanical pump. There is a stretching and rotating composite sealing unit between the two-stage vacuum pipelines. The vacuum stretching and rotating composite sealing unit is used to solve the soft connection between the water-cooled vacuum environment box and the vacuum unit. A high vacuum manual baffle valve is installed on the front-stage vacuum pipeline and the water-cooled vacuum environment box pipeline flange. The vacuum measuring instrument adopts a composite digital display vacuum gauge.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-high temperature CT in-situ mechanical testing device suitable for use in a variety of environments, based on a CT motion platform (1), comprising an ultra-high temperature mechanical testing device (2), an electrical control system (3), and an air-filled vacuum system (4), wherein the CT motion platform (1) provides support and a motion trajectory for the entire testing device.

2. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 1, characterized in that: The electrical control system (2) comprises a base (2.1), a synchronous rotation control system (2.2), a hydraulic servo loading system (2.3), an anti-winding adaptive power-on module (2.4), an ultra-high temperature power-on heating mechanical load loading module (2.5), a column (2.6), a high-precision load measurement unit (2.7), an upper crossbeam (2.8), and an environmental simulation device (2.9); one end of the column (2.6) is fixedly mounted on the upper end of the base (2.1); one end of the column (2.6) away from the base (2.1) is fixedly connected to the upper crossbeam (2.8); the synchronous rotation control system (2.2) is fixedly mounted on both the base (2.1) and the upper crossbeam (2.8); and the lower end of the upper synchronous rotation control system (2.2) is fixedly connected to the high-precision load measurement unit (2.7).

3. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 2, characterized in that: The high-precision load measurement unit (2.7) is fixedly connected to the internal connecting rod (2.5.3) of the ultra-high temperature energized heating mechanical load loading module (2.5); the output shaft of the synchronous rotation control system (2.2) at the lower end is fixedly connected to the hydraulic servo loading system (2.3); the anti-winding adaptive energization module (2.4) is symmetrically installed on the upper and lower sides of the column (2.6); an inert gas interface (2.5.14) is fixedly installed on the outer side of the environmental simulation device (2.9); the inert gas interface (2.5.14) can provide corresponding inert gas according to test requirements; and the water cooling module (2.11) is fixedly installed on the inner side of the environmental simulation device (2.9).

4. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 2, characterized in that: The anti-winding adaptive power-on module (2.4) comprises a self-lubricating high-power power connection clamp (2.4.1), an insulating pad (2.4.2), a clamp block (2.4.3), a cable (2.4.4), and an automatic tightening mechanism (2.4.5); the clamp block (2.4.3) is mounted on a column (2.6); the insulating pad (2.4.2) is mounted on the clamp block (2.4.3); and the automatic tightening mechanism (2.4.5) is fixedly mounted on the insulating pad (2.4.2).

5. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 4, characterized in that: The outer surface of the automatic tightening mechanism (2.4.5) is in contact with the cable (2.4.4); one end of the cable (2.4.4) away from the automatic tightening mechanism (2.4.5) contacts a self-lubricating high-power power connection chuck (2.4.1); and the other end of the self-lubricating high-power power connection chuck (2.4.1) contacts a connecting rod (2.5.3) of the ultra-high temperature electric heating mechanical load loading module (2.5).

6. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 5, characterized in that: The ultra-high temperature electric heating mechanical load loading module (2.5) comprises a connecting plate (2.5.1), an insulating sheet (2.5.2), a connecting rod (2.5.3), a sealing device (2.5.4), a flange ring (2.5.5), a tensile rotating composite sealing unit (2.5.6), a vacuum environment chamber (2.5.7), an upper pull rod (2.5.8), a chuck (2.5.9), a water joint (2.5.10), a specimen (2.5.11), a lower pull rod (2.5.12), a water cooling module (2.5.13), and an inert gas interface (2.5.14). The connecting plate (2.5.1) is fixedly connected to a hydraulic servo loading system (2.3). The connecting plate (2.5.1) is fixedly connected to a hydraulic servo loading system (2.3). An insulating sheet (2.5.2) is provided on the outer surface of the disk (2.5.1), the upper end of the insulating sheet (2.5.2) is fixedly connected to a connecting rod (2.5.3), one end of the sealing device (2.5.4) is fixedly connected to the connecting rod (2.5.3), the other end of the sealing device (2.5.4) is fixedly connected to a lower pull rod (2.5.12), a stretching and rotating composite sealing unit (2.5.6) is installed on the outer side of the sealing device (2.5.4), a flange ring (2.5.5) is fixedly installed on the lower end of the stretching and rotating composite sealing unit (2.5.6), and a vacuum environment box (2.5.7) is fixedly installed on the upper end of the flange ring (2.5.5).

7. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 6, characterized in that: The upper pull rod (2.5.8) and the lower pull rod (2.5.12) are fixedly connected to the upper and lower ends of the clamp (2.5.9) respectively; the upper end of the clamp (2.5.9) is fixedly connected to a water connector (2.5.10); and the water connector (2.5.10) is in communication with a water cooling module (2.5.13).

8. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 1, characterized in that: The electrical control system (3) comprises a heating system (3.1) and a water cooling system (3.2). The water cooling system (3.2) is composed of a cooling water pipeline, a water distributor and a water chiller. Each water distributor has 12 water inlets and 12 water outlets. Two water distributors are connected to the water chiller. A copper ball valve is reserved for each water interface of the water distributor. The water pipes led out of the water distributor are connected to the ultra-high temperature environment device.

9. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 1, characterized in that: The inflation vacuum system (4) comprises a mechanical pump, a vacuum stretching and rotating composite sealing unit, a high vacuum manual butterfly valve and a vacuum measuring instrument. The vacuum pipeline is divided into a front-stage pipeline and a rear-stage pipeline. One end of the front-stage vacuum pipeline is connected to the vacuum environment box, and one end of the rear-stage vacuum pipeline is connected to the outlet of the mechanical pump. The stretching and rotating composite sealing unit is located between the two-stage vacuum pipelines. The high vacuum manual baffle valve is installed on the flange of the front-stage vacuum pipeline and the water-cooled vacuum environment box pipeline.

10. The ultra-high temperature CT in-situ mechanical testing device applicable to various environments according to claim 6, characterized in that: The vacuum environment box (2.5.7) is provided with an inert gas interface (2.5.14) and a water cooling module (2.5.13).

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