Micro-sample mechanical property test apparatus in temperature-controllable and pressure-controllable hydrogen environment

Abstract

The present invention relates to a hydrogen environment mechanical property test apparatus. Disclosed is a micro-sample mechanical property test apparatus in a temperature-controllable and pressure-controllable hydrogen environment. The apparatus at least comprises a hydrogen environment micro-sample loading system, wherein the hydrogen environment micro-sample loading system is formed by connecting a micro-sample loading system and a hydrogen environment chamber, such that a force load can be applied to a micro-sample by means of the micro-sample loading system, and a mechanical property change parameter of the micro-sample in a hydrogen environment is acquired. The apparatus is further provided with a hydrogen environment comprehensive control system, which ensures that the apparatus can perform a mechanical property test at a controllable temperature and a controllable pressure, and can monitor the state of the apparatus in real time; a hydrogen environment chamber sealing apparatus system ensures that the apparatus has a good sealing performance; and a hydrogen leakage alarm system plays a role in providing safety early warnings for the hydrogen environment chamber and ensuring that the apparatus can perform the mechanical property test in a safe environment. The present invention has a micro-sample hydrogen environment chamber, and uses a small-volume hydrogen environment chamber, so that the safety is high, and the accuracy and reliability of a test result can be ensured.

Description

Micro-specimen mechanical properties testing device in a controlled temperature and pressure hydrogen environment Technical Field

[0001] The invention relates to a device for testing mechanical properties in a hydrogen environment, in particular to a device for testing mechanical properties of a micro-sample in a hydrogen environment with controllable temperature and pressure. Background Art

[0002] In the new energy sector, hydrogen has attracted considerable attention as a clean, efficient energy medium. Due to the reactivity of hydrogen, metal materials are susceptible to hydrogen embrittlement in a hydrogen environment, causing material degradation. Furthermore, hydrogen embrittlement is also affected by the combined effects of the hydrogen environment's pressure and temperature.

[0003] With the development and application of hydrogen energy technology, the evaluation of the mechanical properties of materials and equipment in hydrogen environments has become particularly important. Developing mechanical properties testing equipment in hydrogen environments based on traditional mechanical properties testing equipment is difficult due to the large size of standard mechanical specimens and the large volume of the hydrogen environment chamber. This places high demands on sealing and explosion-proofing in the hydrogen environment chamber, and also makes it difficult to control temperature and pressure. Therefore, standard specimen mechanical testing equipment in hydrogen environments is difficult to popularize. Micro-specimen testing technology can significantly reduce the volume of the hydrogen environment chamber, making it easier to control temperature and pressure while also reducing the risks associated with equipment use.

[0004] Therefore, in view of the particularity of the hydrogen environment, it is urgent to develop a new type of micro-specimen mechanical properties testing device in a hydrogen environment under controllable temperature and controllable pressure to solve the above problems.

[0005] Summary of the Invention

[0006] In response to the above technical problems, the present invention provides, on the one hand, a micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment, which is equipped with a micro-specimen hydrogen environment chamber, and the temperature and pressure in the environment chamber are controllable, while ensuring the accuracy and reliability of the test results.

[0007] In order to solve the above technical problems, the first aspect of the present invention provides a micro-sample mechanical property testing device in a hydrogen environment with controllable temperature and controllable pressure, which at least includes a hydrogen environment micro-sample loading system and a hydrogen environment cavity arranged in the hydrogen environment cavity loading system. A micro-sample is provided in the hydrogen environment cavity so that a force load can be applied to the micro-sample via the micro-sample loading system, and the mechanical property change parameters of the micro-sample in the hydrogen environment cavity with controllable temperature and controllable pressure are obtained.

[0008] Preferably, the micro-specimen loading system includes at least a connecting block, a punch rod and a ceramic ball. The punch rod is connected to the load sensor via the connecting block. The ceramic ball is arranged between the punch rod and the micro-specimen. The punch rod is suitable for pushing the ceramic ball to act on the micro-specimen, and obtaining the load-displacement data of the micro-specimen in a hydrogen environment via the load sensor.

[0009] Further preferably, the hydrogen environment cavity is a small-volume hydrogen environment cavity, and a hydrogen environment through hole, a hydrogen tank and a waste gas recovery tank are arranged on the other side of the micro-sample opposite to the ceramic ball. A hydrogen inlet and an exhaust port are provided in the small-volume hydrogen environment cavity, the hydrogen inlet is connected to the hydrogen tank, the exhaust port is connected to the waste gas recovery tank, and the hydrogen environment through hole is suitable for introducing hydrogen into the space where the micro-sample is located, so that the micro-sample is in full contact with the hydrogen.

[0010] Preferably, an inert gas protection chamber is provided outside the hydrogen environment chamber, and the inert gas protection chamber is suitable for heat exchange with the hydrogen environment chamber.

[0011] Further preferably, the micro-specimen mechanical properties testing device also includes a hydrogen environment integrated control system, which includes a temperature control system, a pressure control system and a sensor system. The temperature control system and the pressure control system are respectively connected to the hydrogen environment chamber so as to be able to control the temperature and pressure in the hydrogen environment chamber respectively. The sensor system is connected to the temperature control system and the pressure control system so as to be able to monitor the load, temperature and pressure parameters in the hydrogen environment chamber.

[0012] Preferably, the temperature control system includes a temperature controller, a temperature display screen and a probe plug. The probe plug is suitable for connecting to a temperature sensor for detecting the temperature in the inert gas protection chamber so as to monitor the temperature in the inert gas protection chamber. The temperature controller is also connected to a transformer so as to control the on and off of the transformer via the temperature controller.

[0013] Further preferably, the transformer is also connected to an adjustable power temperature controller, and a ceramic heating plate connected to the adjustable power temperature controller, the ceramic heating plate is arranged at the bottom of the inert gas protection chamber, the ceramic heating plate is suitable for heating the inert gas in the inert gas protection chamber, the ceramic heating plate is also connected to a gasket-type thermocouple, and the gasket-type thermocouple is connected to the adjustable power temperature controller so as to be able to feedback the temperature of the ceramic heating plate and display it via a heating plate temperature display screen arranged on the adjustable power temperature controller.

[0014] Preferably, a pressure control system is provided in the hydrogen environment chamber and the inert gas protection chamber, wherein:

[0015] The pressure control system includes a hydrogen environment chamber pressure controller, and a first solenoid valve and a second solenoid valve connected to the hydrogen environment chamber pressure controller, wherein the first solenoid valve is arranged at the hydrogen gas inlet, and the second solenoid valve is arranged at the gas outlet, so that the opening and closing of the first solenoid valve and the second solenoid valve can be controlled by the hydrogen environment chamber pressure controller, thereby controlling the pressure in the hydrogen environment chamber;

[0016] The pressure control system also includes an inert gas protection chamber pressure controller, and an inert gas protection chamber solenoid valve 1 and an inert gas protection chamber solenoid valve 2 connected to the inert gas protection chamber pressure controller. The inert gas protection chamber solenoid valve 2 is arranged at the inert gas chamber air inlet, and the inert gas protection chamber solenoid valve 1 is arranged at the inert gas protection chamber exhaust, so that the inert gas protection chamber pressure controller can respectively control the opening and closing of the inert gas protection chamber solenoid valve 1 and the inert gas protection chamber solenoid valve 2, thereby controlling the pressure in the inert gas protection chamber.

[0017] Further preferably, the micro-specimen mechanical properties testing device also includes a sealing system, which includes a plurality of sealing rings and sealing ring buckles for fixing each of the sealing rings. The plurality of sealing rings are respectively arranged at the connection between the hydrogen environment chamber column of the hydrogen environment chamber and the inert gas protection chamber column and the upper joint, and a hydrogen environment chamber sealing gasket is also provided at the assembly connection of the hydrogen environment chamber, and an inert gas protection chamber sealing gasket is provided at the assembly connection of the inert gas protection chamber to limit the relative sliding between the hydrogen environment chamber column and the inert gas protection chamber column and the upper joint to cause gas leakage.

[0018] Preferably, the micro-specimen mechanical properties testing device also includes an alarm system, which includes a first pressure alarm deep in the inert gas protection chamber and a second pressure alarm deep in the hydrogen environment chamber. The first pressure alarm is suitable for obtaining pressure changes in the inert gas protection chamber, and the second pressure alarm is suitable for obtaining pressure changes in the hydrogen environment chamber. The first pressure alarm and the second pressure alarm are suitable for issuing an alarm when the pressure suddenly increases or exceeds a set limit.

[0019] Through the above technical solution, the present invention designs a small punched micro-sample device with a hydrogen environment through-hole, and the hydrogen environment chamber ensures sufficient contact between the micro-sample and hydrogen. The small-volume hydrogen environment chamber has the advantage of being safe to use and can be safely promoted and applied, providing a guarantee for the safe application of the test equipment.

[0020] It is capable of performing high-precision mechanical property testing under controllable temperature and pressure conditions. The temperature control system ensures that the micro-specimen is kept at a stable temperature, the pressure control system monitors and adjusts the hydrogen pressure of the device in real time, and the sensor system monitors the load, temperature, and pressure changes of the device in real time, providing accurate and reliable test data. This enables the device to accurately evaluate the mechanical properties of materials and provide reliable test results in a hydrogen environment.

[0021] The sealing system and alarm system of the small-volume hydrogen environment chamber ensure that the device has good sealing and safety in the hydrogen environment, can prevent hydrogen leakage and interference from external gas impurities, and ensure the sealing reliability of the test process.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the overall structure of a micro-specimen mechanical property testing device in a controllable temperature and controllable pressure hydrogen environment according to a specific embodiment of the present invention;

[0024] FIG2 is a schematic front cross-sectional view of a micro-specimen mechanical property testing device in a controllable temperature and controllable pressure hydrogen environment according to a specific embodiment of the present invention;

[0025] FIG3 is a schematic cross-sectional view of a micro-specimen mechanical property testing device in a controllable temperature and controllable pressure hydrogen environment according to a specific embodiment of the present invention;

[0026] FIG4 is a schematic diagram of a temperature control system of a micro-specimen mechanical property testing device in a controllable temperature and controllable pressure hydrogen environment according to a specific embodiment of the present invention;

[0027] FIG5 is a schematic diagram of a pressure control system of a micro-specimen mechanical property testing device in a controllable temperature and controllable pressure hydrogen environment according to a specific embodiment of the present invention.

[0028] Explanation of reference numerals: 1. Upper connector; 2. Load sensor connection; 3. Hydrogen environment chamber column; 4. Inert gas protection chamber column; 5. Inert gas protection chamber box cover; 6. Inert gas chamber connection threaded hole; 7. Inert gas chamber temperature sensor; 8. Probe plug; 9. Temperature display; 10. Temperature controller; 11. Jack; 12. Hydrogen environment chamber temperature sensor; 13. Inert gas chamber housing; 14. Transformer output port; 15. Transformer; 16. Transformer input port; 17. Plug; 18. Power adjustment knob; 19. Heating plate temperature display; 20. Adjustable power temperature controller; 21. Lower connector; 22. First solenoid valve; 23. Hydrogen tank; 24. Air inlet; 25. Exhaust port; 26. Second solenoid valve; 27. Waste gas recovery tank; 28. Hydrogen environment chamber pressure controller; 29. ​​Inert gas chamber solenoid valve 1; 30. Inert gas chamber pressure controller; 31. Inert gas chamber exhaust port; 32. Inert gas tank; 33. Inert gas protection chamber solenoid valve 2; 34. Inert gas protection chamber air inlet; 35. First pressure alarm; 36. Second pressure alarm; 37. Sealing ring buckle 1; 38. Sealing ring 1; 39. Sealing ring buckle 2; 40. Sealing ring 2; 41. Inert gas protection chamber sealing gasket; 42. Hydrogen environment chamber connecting threaded hole; 43. Inert gas protection chamber; 44. Hydrogen environment chamber; 45. Ceramic heating plate; 46. Gasket-type thermocouple; 47. Load sensor; 48. Sealing ring buckle 3; 49. Sealing ring 3; 50. Hydrogen environment chamber sealing gasket; 51. Sealing ring buckle 4; 52. Sealing ring 4; 53. Glass fiber insulation layer; 54. Connecting block; 55. Punch rod; 56. Clamping block threaded hole; 57. Hydrogen environment through hole; 58. Micro sample; 59. Ceramic ball; 60. Pin hole. DETAILED DESCRIPTION

[0029] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the term "setting" should be understood in a broad sense. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances.

[0031] Referring to Figure 1, a micro-sample mechanical property testing device in a controllable temperature and controllable pressure hydrogen environment according to a specific embodiment of the present invention includes a micro-sample loading system and a hydrogen environment chamber 44. By connecting the micro-sample loading system to the hydrogen environment chamber 44 and applying a force load to the micro-sample through the micro-sample loading system, the mechanical property change parameters of the micro-sample in the hydrogen environment are obtained.

[0032] Referring to FIG3 , specifically, the micro-specimen loading system includes at least a connecting block 54, a punch 55, and a ceramic ball 59. The punch 55 is connected to the load sensor 27 via the connecting block 54. The ceramic ball 59 is disposed between the punch 55 and the micro-specimen 58. The punch 55 is adapted to push the ceramic ball 59 to act on the micro-specimen 58, and to obtain the load-displacement data of the micro-specimen 58 in a hydrogen environment via the load sensor 27. The micro-specimen loading system also includes an upper joint 1, a lower joint 21, a threaded hole 56 of the clamping block, a hydrogen environment through-hole 57, and a pin hole 60 provided on the connecting block 54. The upper joint 1 and the lower joint 21 serve as connecting devices to connect the entire component used to act on the micro-specimen 58. The connecting block 54 and the pin hole 60 can be used to fix the punch 55 on one side of the micro-specimen 58 and ensure that it will not be displaced or loosened during the test. During the mechanical properties test, the upper joint 1 is connected to the mechanical properties testing machine, which transmits the set load and displacement to the load sensor 27 through the upper joint 1. The load sensor 27 is connected to the punch 55 through the connecting block 54 and the pin hole 60, and pushes the ceramic ball 59 downward (toward the micro-sample direction) so that the ceramic ball 59 can act on the micro-sample 58, thereby realizing the mechanical properties test of the small punched micro-sample in a hydrogen environment. Among them, by controlling the hydrogen environment micro-sample loading system, different degrees of force load can be applied to the micro-sample 58, and the displacement data of the punch can be obtained in real time, thereby obtaining the load and displacement data of the micro-sample 58 in the hydrogen environment.

[0033] In order to enable the micro-sample to fully contact with hydrogen and accurately obtain the load-displacement data of the micro-sample in a hydrogen environment, a small-volume hydrogen environment cavity 44 is used when testing the micro-sample, and a hydrogen environment through hole 57, a hydrogen tank 23 and a waste gas recovery tank 27 are arranged on the other side of the micro-sample 58 opposite to the ceramic ball 59. A hydrogen inlet 24 and an exhaust port 25 are provided in the small-volume hydrogen environment cavity 44. The hydrogen inlet 24 is connected to the hydrogen tank 23, and the exhaust port 25 is connected to the waste gas recovery tank 27. The hydrogen environment through hole 57 is suitable for introducing hydrogen into the space where the micro-sample 58 is located, so that the micro-sample 58 can fully contact with hydrogen.

[0034] During ventilation, hydrogen tank 23 is first opened to release hydrogen. Hydrogen then flows into small-volume hydrogen environment chamber 44 through hydrogen environment chamber inlet 24. Simultaneously, air in small-volume hydrogen environment chamber 44 flows out through exhaust port 25 to exhaust gas recovery tank 27, thereby discharging the air present in small-volume hydrogen environment chamber 44 until the small-volume hydrogen environment chamber 44 is completely filled with hydrogen. The hydrogen in hydrogen environment chamber 44 then fully contacts micro-specimen 58 through hydrogen environment through-hole 57, thereby forming a hydrogen environment with controllable temperature and pressure. Therefore, by combining the micro-specimen loading system with hydrogen environment chamber 44, hydrogen environment chamber 44 can provide a hydrogen environment for the hydrogen environment micro-specimen loading system, ensure full contact between micro-specimen 58 and hydrogen, and accurately obtain load-displacement data of micro-specimen 58 in the hydrogen environment.

[0035] Referring to Figure 2, specifically, an inert gas protection chamber 43 is provided outside the hydrogen environment chamber 44, an inert gas protection chamber shell 13 is provided outside the inert gas protection chamber, the small-volume hydrogen environment chamber 44 is arranged in the inert gas protection chamber 43, and an inert gas protection chamber box cover 5 is also provided on the top of the inert gas protection chamber 43, which is connected through the gas protection chamber connecting threaded hole 6, and heat exchange can be achieved between the inert gas protection chamber 43 and the hydrogen environment chamber 44.

[0036] In order to be able to effectively control the temperature and pressure during the test, the micro-specimen mechanical properties testing device also includes a hydrogen environment comprehensive control system, which includes a temperature control system, a pressure control system and a sensor system.

[0037] Specifically, the temperature control system includes a temperature controller 10, a temperature display screen 9, and a probe plug 8. The probe plug 8 is adapted to connect to a temperature sensor for detecting temperature within the inert gas protection chamber 43 to monitor the temperature within the inert gas protection chamber 43. Based on the control capabilities of the temperature controller 10 and the monitoring function of the temperature display screen 9 of the hydrogen environment chamber, the probe plug 8 is connected to the hydrogen environment chamber temperature sensor 12 and the inert gas protection chamber temperature sensor 7 to accurately monitor the temperature within the device. The temperature controller 10 is set with a maximum temperature and a minimum temperature. By connecting the plug 17 of the transformer 15 to the jack 11 provided on the temperature controller 10, the transformer 15 can be controlled to be on and off.

[0038] When the temperature deviation of the hydrogen environment chamber 44 and the inert gas protection chamber 43 is measured to exceed 2°C, the thermostat 10 will automatically cut off the power supply until the temperature difference is lower than 2°C, then it will automatically power on; when the measured temperature is higher than the set maximum temperature, the thermostat 10 will automatically cut off the power supply.

[0039] In addition, the transformer 15 is also connected to an adjustable power temperature controller 20, and a ceramic heating plate 45 connected to the adjustable power temperature controller 20. The ceramic heating plate 45 is arranged at the bottom of the inert gas protection chamber 43. The ceramic heating plate 45 is suitable for heating the inert gas in the inert gas protection chamber 43. The ceramic heating plate 45 is also connected to a gasket-type thermocouple 46. The gasket-type thermocouple 46 is connected to the adjustable power temperature controller 20 so as to be able to feedback the temperature of the ceramic heating plate 45 and display it via the heating plate temperature display screen 19 set on the adjustable power temperature controller 20.

[0040] Therefore, when the measured temperature is higher than the set maximum temperature, the thermostat 10 will automatically be powered on, and the adjustable power temperature controller 20 can control the ceramic heating plate 45 to reduce the heating power until it is reduced to the set temperature range, and the thermostat 10 will automatically be powered on; conversely, when the measured temperature is lower than the set minimum temperature, the thermostat 10 continues to be powered on, and the adjustable power temperature controller 20 controls the ceramic heating plate 45 to increase the heating power until it is raised to the set temperature range; when the measured temperature is within the set temperature range, the thermostat 10 continues to be powered on, and the adjustable power temperature controller 20 controls the ceramic heating plate 45 to maintain the heating power.

[0041] In addition, the temperature control system needs to be stable and accurate. By providing a glass fiber protective layer 53 inside and outside the device, the glass fiber protective layer 53 can effectively reduce the heat transfer between the inside of the device and the external environment, thereby providing a heat insulation effect for the device, ensuring that the device can maintain a stable temperature within the set temperature range and meet the experimental requirements. The temperature control system maintains the device within the required temperature range by automatically controlling the power on and off of the thermostat 10 and the adjustable power temperature controller 20 controlling the heating power of the ceramic heating plate 45. In addition, the temperature control accuracy of the thermostat 10 is very high and can be controlled within a range of ±0.1°C, ensuring more accurate temperature control accuracy.

[0042] More specifically, since hydrogen is explosive, the hydrogen environment chamber 44 cannot be heated directly. It is necessary to heat the hydrogen in the hydrogen environment chamber 44 safely and reliably by heating the inert gas protection chamber 43 .

[0043] During heating, the heating power of the ceramic heating plate 45 is controlled by the power adjustment knob 18 of the adjustable power temperature controller 20. The transformer 15 converts the 220V voltage input from the input port 16 into a 24V voltage at the output port 14, and then transmits it to the adjustable power temperature controller 20. After power is turned on, the ceramic heating plate 45 will heat up, and the maximum surface temperature can reach 330°C. The ceramic heating plate 45 transfers heat to the inert gas through the bottom of the inert gas protection chamber 43, thereby heating the inert gas, and the gasket-type thermocouple 46 can feed back the temperature of the ceramic heating plate 45 to the adjustable power temperature controller 20 in real time, and display it through the heating plate temperature display screen 19, so as to adjust the adjustment knob 18 according to the displayed temperature; and when the feedback temperature exceeds 300°C, the adjustable power temperature controller 20 will automatically adjust the heating power to the lowest, thereby protecting the ceramic heating plate 45.

[0044] In order to control the pressure in the hydrogen environment chamber and the inert gas protection chamber, a pressure control system is further provided. The pressure control system includes a hydrogen environment chamber pressure controller 28 and an inert gas protection chamber pressure controller 30 .

[0045] This section describes the operation of hydrogen environment chamber pressure controller 28 within hydrogen environment chamber 44. Connected to the chamber corresponding to hydrogen environment chamber pressure controller 28 are first solenoid valve 22 and second solenoid valve 26. By controlling the on / off states of first solenoid valve 22 and second solenoid valve 26, the pressure within hydrogen environment chamber 44 can be controlled.

[0046] First, the maximum and minimum pressures are set using the hydrogen environment chamber pressure controller 28. When the hydrogen pressure in the hydrogen environment chamber 44 exceeds the set maximum pressure, the hydrogen environment chamber pressure controller 28 controls the second solenoid valve 26 to open until the hydrogen pressure drops within the set pressure range. The second solenoid valve 26 then closes, and the exhausted hydrogen is recovered into the exhaust gas recovery tank 27 through the exhaust port 25 of the hydrogen environment chamber 44. When the hydrogen pressure in the hydrogen environment chamber 44 drops below the set minimum pressure, the hydrogen environment chamber pressure controller 28 controls the first solenoid valve 22 to open, connecting the hydrogen tank 23 to the hydrogen environment chamber 44 via the inlet pipe. At this point, hydrogen in the hydrogen tank 23 flows into the hydrogen environment chamber 44 through the inlet pipe. The first solenoid valve 22 closes until the hydrogen pressure rises within the set pressure range, thereby ensuring that the hydrogen pressure in the hydrogen environment chamber 44 is controlled. Therefore, by controlling the inlet and outlet flow of hydrogen, the hydrogen environment chamber pressure controller 28 can accurately adjust the pressure in the hydrogen environment chamber 44, ensuring that the mechanical properties test of the device is carried out under stable pressure.

[0047] In addition, the pressure in the inert gas chamber 43 needs to be controlled. The inert gas chamber pressure controller 30 monitors the real-time pressure of the inert gas in the inert gas chamber 43. The pressure in the inert gas chamber 43 is controlled by controlling the on / off states of the inert gas chamber solenoid valve 1 29 and the inert gas chamber solenoid valve 2 33. The maximum and minimum pressures are set by the inert gas protection chamber pressure controller 30. When it is detected that the pressure of the inert gas in the inert gas protection chamber 43 exceeds the set maximum pressure, the inert gas protection chamber pressure controller 30 will control the inert gas protection chamber solenoid valve 1 29 to open until the pressure of the inert gas drops to within the set pressure range, and the inert gas protection chamber solenoid valve 1 29 will not close. The discharged inert gas will be recovered to the waste gas recovery tank 27 through the inert gas protection chamber exhaust port 31; when it is detected that the pressure of the inert gas in the inert gas protection chamber 43 is lower than the set minimum pressure, the inert gas protection chamber pressure controller 30 will control the inert gas protection chamber solenoid valve 2 33 to open, and the inert gas in the inert gas tank 32 will flow into the inert gas protection chamber 43 through the inert gas protection chamber air inlet 34, and will not close until the pressure of the inert gas rises to within the set pressure range, thereby ensuring the pressure control of the inert gas in the inert gas protection chamber 43. By controlling the inlet and outlet flow of the inert gas, the inert gas protection chamber pressure controller 30 can accurately adjust the pressure in the inert gas protection chamber 43 , ensuring the stability of the inert gas pressure, thereby stably protecting and heating the hydrogen environment chamber 44 .

[0048] The sensor system is used to monitor the load, temperature, and pressure status of the device in real time, providing comprehensive data support for mechanical performance testing. The load sensor 47 it contains can accurately measure the magnitude of the load on the micro-specimen 58 and feed it back to the computer (terminal device) through the load sensor connection 2. The sensor system also includes a hydrogen environment chamber temperature sensor 12 and an inert gas protection chamber temperature sensor 7. The hydrogen environment chamber temperature sensor 12 and the inert gas protection chamber temperature sensor 7 are used to detect the temperature in the hydrogen environment chamber 44 and the inert gas protection chamber 43, respectively, and transmit the data to the corresponding temperature controller 10. The hydrogen environment chamber pressure controller 28 and the inert gas protection chamber pressure controller 30 provide real-time display and monitoring. When the pressure in the hydrogen environment chamber 44 deviates from the set range, the hydrogen environment chamber pressure controller 28 will automatically control the switching status of the first solenoid valve 2 and the second solenoid valve 26 to restore the stability of the pressure in the hydrogen environment chamber 44; and when the pressure in the inert gas protection chamber 43 deviates from the set range, the inert gas protection chamber pressure controller 30 will automatically control the switching status of the inert gas protection chamber solenoid valve 1 26 and the inert gas protection chamber solenoid valve 2 33 to restore the stability of the pressure in the inert gas protection chamber 43.

[0049] In order to ensure the sealing and safety of the device in a hydrogen environment, a sealing system is also required to be set up. The sealing system includes multiple sealing rings and sealing ring buckles for fixing each sealing ring, wherein the sealing rings include sealing ring one 38, sealing ring two 40, sealing ring three 49 and sealing ring four 52, as well as an inert gas protection chamber sealing gasket 41 and a hydrogen environment chamber sealing gasket 50. The multiple sealing rings are fixed by sealing ring buckle one 37, sealing ring buckle two 39, sealing ring buckle three 48, and sealing ring buckle four 51 respectively. Through the sealing setting, hydrogen and inert gas can be placed in the hydrogen environment chamber 44 and the inert gas protection chamber 43.

[0050] Among them, the sealing between the hydrogen environment chamber 44 and the inert gas protection chamber column 4, the hydrogen environment chamber column 3 and the upper joint 1 in the inert gas protection chamber 43 is a critical sealing link in the hydrogen environment sealing device system. During the experiment, the inert gas protection chamber column 4, the hydrogen environment chamber column 3 and the upper joint 1 will slide relative to each other, so gas leakage is very likely to occur. In order to avoid gas leakage, two sealing and hydrogen leakage alarm systems are set for the device to ensure the sealing and safety of the device. Among them, the sealing ring buckle 3 48 and the sealing ring 3 49 are the first seals of the hydrogen environment chamber 44. The sealing ring 3 49 and the inner ring of the hydrogen environment chamber column 3 and the upper joint 1 are interference fit, which can effectively prevent hydrogen leakage between the hydrogen environment chamber column 3 and the upper joint 1. The sealing ring buckle 3 48 plays a role in fixing the sealing ring 3 49, effectively preventing the sealing ring 3 49 from moving together when relative movement occurs between the hydrogen environment chamber column 3 and the upper joint 1. The sealing ring buckle 1 37 and the sealing ring 1 38 are the second seal of the hydrogen environment chamber 44. They still seal the hydrogen environment chamber 44 in the event that the first seal of the hydrogen environment chamber 44 fails. The sealing ring buckle 4 51 and the sealing ring 4 52 are the first seal of the inert gas protection chamber 43. The sealing ring 4 52 has an interference fit with the inner ring of the inert gas protection chamber column 4 and the hydrogen environment chamber column 3, thereby effectively preventing the leakage of inert gas between the inert gas protection chamber column 4 and the hydrogen environment chamber column 3. The sealing ring buckle 4 51 fixes the sealing ring 4 52, effectively preventing the sealing ring 4 52 from moving together when the inert gas protection chamber column 4 and the hydrogen environment chamber column 3 move relative to each other. The sealing ring buckle 2 39 and the sealing ring 2 40 are the second seal of the inert gas protection chamber 43. They still seal the inert gas protection chamber 43 in the event that the first seal of the inert gas protection chamber 43 fails.

[0051] The inert gas protection chamber sealing gasket 41 and the hydrogen environment chamber sealing gasket 50 are respectively arranged at the assembly connection between the inert gas protection chamber box cover 5 and the inert gas protection chamber shell 13, and the assembly connection between the hydrogen environment chamber box cover and the hydrogen environment hydrogen shell, and are fastened together by the inert gas protection chamber connection threaded hole 6 and the hydrogen environment chamber connection threaded hole 42, respectively. Therefore, by setting the inert gas protection chamber sealing gasket 41 and the hydrogen environment chamber sealing gasket 50, a sealing effect is further played, the sealing performance of the device is ensured, and additional safety protection is provided. Through the sealing setting, the device can be tested for mechanical properties for a long time in a safe environment. It effectively prevents the leakage of hydrogen and avoids the contact of hydrogen with the external environment, thereby reducing safety risks. At the same time, the sealing system also prevents the entry of external impurities, ensures the purity of the test environment, and thus ensures the reliability of the test results.

[0052] Although the sealing system can effectively prevent the leakage of hydrogen and inert gas in the test device, if a leak occurs, an alarm system needs to be set up to monitor and protect the device to ensure safety and reliability during the test. When the first sealing ring buckle three 48 and sealing ring three 49 of the hydrogen environment chamber 44 leak, the second pressure alarm 36 detects that the pressure in the hydrogen environment chamber column 3 suddenly increases, thereby automatically alarming. When the first sealing ring buckle four 51 and sealing ring four 52 of the inert gas protection chamber 43 leak, the first pressure alarm 35 detects that the pressure in the inert gas protection chamber column 4 suddenly increases, thereby automatically alarming. This enables timely replacement of relevant sealing devices, plays a safety warning function, and ensures that the device can perform mechanical property testing in a safe environment.

[0053] A method for testing the mechanical properties of a micro-sample in a temperature-controlled and pressure-controlled hydrogen environment at room temperature and pressure, according to a specific embodiment of the present invention, comprises the following steps:

[0054] Preparation: Place the micro-specimen 58 in the punch device, ensure that the upper joint 1 and the lower joint 21 are connected to the mechanical properties testing machine, and connect the hydrogen tank 23 to the hydrogen environment chamber inlet 24, the hydrogen environment chamber exhaust 25 to the waste gas recovery tank 27, the inert gas tank 32 to the inert gas protection chamber inlet 34, and the inert gas protection chamber exhaust 31 to the waste gas recovery tank 27.

[0055] Gas preparation: Open the first solenoid valve 22 and the second solenoid valve 26 to release the gas from the hydrogen tank 23. Hydrogen enters the hydrogen environment chamber 44 through the first solenoid valve 22 and the hydrogen environment chamber air inlet 24, and simultaneously flows out of the second solenoid valve 26 and the hydrogen environment chamber air outlet 25 to the waste gas recovery tank 27 to expel any air that may be present in the hydrogen environment chamber 44. Open the inert gas protection chamber solenoid valve 1 29 and the inert gas protection chamber solenoid valve 2 33 to release the gas (e.g., nitrogen) from the inert gas tank 32. The inert gas enters the inert gas protection chamber 43 through the inert gas protection chamber solenoid valve 2 33 and the inert gas protection chamber air inlet 34, and simultaneously flows out of the inert gas protection chamber solenoid valve 1 29 and the inert gas protection chamber air outlet 31 to the waste gas recovery tank 27 to expel any air that may be present in the inert gas protection chamber 43.

[0056] Normal temperature control: By setting the maximum temperature of the thermostat 10 to 30.5°C and the minimum temperature to 29.5°C, and the temperature difference between the two temperature sensors input is 2°C, and then connecting the plug 17 of the transformer 15 to the jack 11 of the thermostat 10, the transformer 15 will convert the 220V voltage input from the input port 16 into a 24V voltage at the output port 14 and then transmit it to the adjustable power temperature controller 20; after power is turned on, the adjustable power temperature controller 20 will control the ceramic heating plate 45 to generate heat, and its maximum surface temperature can reach 330°C. The heating plate transfers heat to the inert gas through the bottom of the inert gas protection chamber 43, thereby heating the inert gas. The inert gas then transfers heat to the hydrogen environment chamber 44 using the principle of heat transfer, thereby heating the hydrogen; at the same time, the inert gas protection chamber temperature sensor 7 and the hydrogen environment chamber temperature sensor 12 will also feed back the temperatures measured by the inert gas protection chamber 43 and the hydrogen environment chamber 44 to the thermostat 10. When the temperature deviation between the hydrogen environment chamber 44 and the inert gas protection chamber 43 exceeds 2°C, the thermostat 10 will automatically cut off the power supply until the temperature difference is lower than 2°C. When the temperature is higher than the maximum temperature of 30.5°C, the thermostat 10 will automatically cut off the power supply, and the adjustable power temperature controller 20 will control the ceramic heating plate 45 to reduce the heating power until it is reduced to the range of 29.5°C to 30.5°C, and the thermostat 10 will automatically turn on the power supply. On the contrary, when the temperature is lower than the minimum temperature of 29.5°C, the thermostat 10 will continue to be powered on, and the adjustable power temperature controller 20 will control the ceramic heating plate 45 to reduce the heating power. The ceramic heating plate 45 increases the heating power until it rises to the range of 29.5℃~30.5℃; when the measured temperature is within the range of 29.5℃~30.5℃, the thermostat 10 continues to be powered on, and the adjustable power temperature controller 20 controls the ceramic heating plate 45 to maintain the heating power; at the same time, the temperature control system needs to have low-temperature stability and accuracy, and the glass fiber protective layer 54 effectively reduces the heat transfer between the inside of the device and the surrounding environment, thereby having an insulation effect on the device, ensuring that the device can maintain a stable temperature at room temperature and meet the requirements of the experiment.

[0057] The normal temperature control is achieved by automatically controlling the on and off of the power supply by the thermostat 10 and controlling the heating power of the ceramic heating plate 45 by the adjustable power temperature controller 20 to maintain the device within the range of 29.5°C to 30.5°C.

[0058] Normal pressure control: Hydrogen environment chamber control. By setting the maximum pressure of the hydrogen environment chamber pressure controller 28 to 0.11 MPa and the minimum pressure to 0.09 MPa, when it is detected that the hydrogen pressure in the hydrogen environment chamber 44 exceeds the set maximum pressure of 0.11 MPa, the hydrogen environment chamber pressure controller 28 will control the second solenoid valve 26 to open until the hydrogen pressure drops to the set pressure range of 0.09 MPa to 0.11 MPa. The second solenoid valve 26 will then close, and the discharged hydrogen will be recovered to the waste gas recovery tank 27 through the hydrogen environment chamber exhaust port 25; when it is detected that the hydrogen pressure in the hydrogen environment chamber 44 is lower than the set minimum pressure of 0.09 MPa, the hydrogen environment chamber pressure controller 28 will control the first solenoid valve 22 to open, and the hydrogen in the hydrogen tank 23 will flow into the hydrogen environment chamber 44 through the hydrogen environment chamber inlet pipe 24. The first solenoid valve 22 will not close until the hydrogen pressure rises to the set pressure range, thereby ensuring the pressure control of the hydrogen in the hydrogen environment chamber 44.

[0059] The inert gas protection chamber is controlled by setting the maximum pressure of the inert gas protection chamber pressure controller 30 to 0.11 MPa and the minimum pressure to 0.09 MPa.

[0060] When it is detected that the pressure of the inert gas in the inert gas protection chamber 43 exceeds the set maximum pressure of 0.11 MPa, the inert gas protection chamber pressure controller 30 will control the inert gas protection chamber solenoid valve 29 to open, and the inert gas protection chamber solenoid valve 29 will not be closed until the pressure of the inert gas drops to the set pressure range of 0.09 MPa to 0.11 MPa. The discharged inert gas will be recovered to the waste gas recovery tank 27 through the inert gas protection chamber exhaust port 31.

[0061] When it is detected that the pressure of the inert gas in the inert gas protection chamber 43 is lower than the set minimum pressure of 0.09 MPa, the inert gas protection chamber pressure controller 30 will control the inert gas protection chamber solenoid valve 2 33 to open, and the inert gas in the inert gas tank 32 will flow into the inert gas protection chamber 43 along the inert gas protection chamber air inlet 34. The inert gas protection chamber solenoid valve 2 33 will not be closed until the pressure of the inert gas rises to the set pressure range of 0.09 MPa to 0.11 MPa, thereby ensuring the pressure control of the inert gas in the inert gas protection chamber 43.

[0062] By controlling the inlet and outlet flow of the inert gas, the inert gas protection chamber pressure controller 30 can accurately adjust the pressure of the inert gas protection chamber 43 within the range of 0.09 MPa to 0.11 MPa, ensuring the stability of the inert gas pressure and thus protecting and heating the hydrogen environment chamber 44.

[0063] Mechanical properties test: First, connect the upper connector 1 to the mechanical properties testing machine, set the test parameters of the mechanical properties testing machine, set the maximum load to 5000N, the displacement to 1.6mm, and the loading speed to 0.1mm / min; start the mechanical properties testing machine, and transmit the load to the load sensor 27 through the upper connector 1. The load sensor 27 is connected to the punch 55 through the connecting block 54 and the pin hole 60, and pushes the ceramic ball 59 to move in the direction close to the micro-sample 58 so that the ceramic ball 59 can act on the top of the micro-sample 58, thereby realizing the mechanical properties test of the small punching micro-sample in a hydrogen environment. The load sensor 27 will feed back the load it receives to the computer in real time, and the mechanical properties testing machine will also feed back its own displacement to the computer in real time. However, the load received by the load sensor 27 is the load received by the micro-sample 58, and the mechanical properties testing machine will also feed back its own displacement to the computer in real time. Therefore, the load displacement data of the micro-sample 58 will be obtained.

[0064] End of Experiment: After completing the required mechanical properties tests, stop the mechanical properties testing machine and save and organize the corresponding data. Open the second solenoid valve 26 and the inert gas protection chamber solenoid valve 1 29, allowing hydrogen and inert gas to slowly flow into the exhaust gas recovery tank 27 through the hydrogen environment chamber exhaust port 25 and the inert gas protection chamber exhaust port 31, respectively.

[0065] A method for testing the mechanical properties of a micro-sample in a high-temperature and high-pressure hydrogen environment in a specific embodiment of the present invention comprises the following steps:

[0066] The preparation work, gas preparation and inert gas protection chamber control in pressure control are the same as those for normal temperature experiments.

[0067] High-temperature control: By setting the maximum temperature of the digital intelligent temperature controller 10 to 50.5°C and the minimum temperature to 49.5°C, with a temperature difference of 2°C between the two temperature sensors, and then connecting the plug 17 of the transformer 15 to the jack 11 of the digital intelligent temperature controller 10, the transformer 15 will convert the 220V voltage input from the input port 16 into a 24V voltage at the output port 14, which is then transmitted to the adjustable power temperature controller 20. After power is applied, the adjustable power temperature controller 20 will control the ceramic heater 45 to generate heat, and its maximum surface temperature can reach 330°C. The heater transfers heat to the inert gas through the bottom of the inert gas protection chamber 43, thereby heating the inert gas. The inert gas then transfers heat to the hydrogen environment chamber 44 using the principle of heat transfer, thereby heating the hydrogen. At the same time, the inert gas protection chamber temperature sensor 7 and the hydrogen environment chamber temperature sensor 12 also feed back the temperatures measured by the inert gas protection chamber 43 and the hydrogen environment chamber 44 to the digital intelligent temperature controller 10, respectively.

[0068] Among them, when the temperature deviation of the hydrogen environment chamber 44 and the inert gas protection chamber 43 is measured to be more than 2°C, the digital display intelligent temperature controller 10 will automatically cut off the power supply until the temperature difference is lower than 2°C, and then it will automatically power on; when the measured temperature is higher than the maximum 50.5°C, the digital display intelligent temperature controller 10 will automatically cut off the power supply, and the adjustable power temperature controller 20 will control the ceramic heating plate 45 to reduce the heating power until it is reduced to the range of 49.5°C to 50.5°C, and the digital display intelligent temperature controller 10 will automatically power on; on the contrary, when the measured temperature is lower than the minimum 49.5°C, the digital display intelligent temperature controller 10 will continue to power on, and the adjustable power temperature controller 20 will control the ceramic heating plate 45 to reduce the heating power until it is reduced to the range of 49.5°C to 50.5°C, and then the digital display intelligent temperature controller 10 will automatically power on. The temperature controller 20 controls the ceramic heating plate 45 to increase the heating power until it rises to the range of 49.5℃ to 50.5℃; when the measured temperature is within the range of 49.5℃ to 50.5℃, the digital display intelligent temperature controller 10 continues to be powered on, and the adjustable power temperature controller 20 controls the ceramic heating plate 45 to maintain the heating power; at the same time, the temperature control system needs to have high-temperature stability and accuracy. The glass fiber protective layer 54 effectively reduces the heat transfer between the interior of the device and the surrounding environment, thereby providing insulation for the device, ensuring that the device can maintain a stable temperature at room temperature and meet the requirements of the experiment. High-temperature control maintains the device within the range of 49.5℃ to 50.5℃ by automatically controlling the power on and off of the digital display intelligent temperature controller 10 and controlling the heating power of the ceramic heating plate 45 by the adjustable power temperature controller 20.

[0069] High-pressure control: hydrogen environment chamber control, by setting the maximum pressure of the hydrogen environment chamber digital display intelligent pressure controller 28 to 1.01Mpa and the minimum pressure to 0.99Mpa, when it is detected that the pressure of hydrogen in the hydrogen environment chamber 44 exceeds the set maximum pressure of 1.01Mpa, the hydrogen environment chamber digital display intelligent pressure controller 28 will control the hydrogen environment chamber solenoid valve 26 to open, until the hydrogen pressure drops to the set pressure range of 0.99Mpa to 1.01Mpa, the hydrogen environment chamber solenoid valve 26 will be closed, and the discharged hydrogen will be recovered to the waste gas recovery tank 27 through the hydrogen environment chamber exhaust port 25; when it is detected that the hydrogen pressure in the hydrogen environment chamber 44 is lower than the set minimum pressure of 0.99Mpa, the hydrogen environment chamber digital display intelligent pressure controller 28 will control the hydrogen environment chamber solenoid valve 1 22 to open, and the hydrogen in the hydrogen tank 23 will flow into the hydrogen environment chamber 44 along the hydrogen environment chamber inlet pipe 24, until the hydrogen pressure rises to the set pressure range, the solenoid valve 1 22 will be closed, thereby ensuring the pressure control of the hydrogen in the hydrogen environment chamber 44.

[0070] Mechanical properties test: First, connect the upper connector 1 to the mechanical properties testing machine, set the test parameters of the mechanical properties testing machine, set the maximum load to 5000N, the displacement to 1.6mm, and the loading speed to 0.1mm / min; start the mechanical properties testing machine, and transmit the load to the load sensor 27 through the upper connector 1. The load sensor 27 is connected to the punch 55 through the connecting block 54 and the pin hole 60 to push the ceramic ball 59 toward the direction close to the micro sample 58, so that the ceramic ball 59 acts on the top of the micro sample 58, thereby realizing the mechanical properties test of the small punching micro sample in the hydrogen environment. The load sensor 27 will feed back the load it receives to the computer in real time, and the mechanical properties testing machine will also feed back its own displacement to the computer in real time. The load received by the load sensor 27 is the load received by the micro sample 58, and the mechanical properties testing machine will also feed back its own displacement to the computer in real time. The load received by the load sensor 27 is the load received by the micro sample 58, and the mechanical properties testing machine will also feed back its own displacement to the computer in real time. Thus, the load displacement data of the micro sample 58 will be obtained.

[0071] End of Experiment: After completing the required mechanical properties tests, stop the mechanical properties testing machine and save and organize the corresponding data. Open the second solenoid valve 26 and the inert gas protection chamber solenoid valve 1 29, allowing hydrogen and inert gas to slowly flow into the exhaust gas recovery tank 27 through the hydrogen environment chamber exhaust port 25 and the inert gas protection chamber exhaust port 31, respectively.

[0072] A method for testing the mechanical properties of a micro-sample in a low-temperature and high-pressure hydrogen environment in a specific embodiment of the present invention comprises the following steps:

[0073] Preparation: Gas preparation and hydrogen environment chamber control in pressure control are the same as those in room temperature experiments.

[0074] Temperature control: By setting the maximum temperature of the thermostat 10 to -189.5°C and the minimum temperature to -190.5°C, and the temperature difference between the two temperature sensors input is 2°C, and then connecting the plug 17 of the transformer 15 to the jack 11 of the thermostat 10, the transformer 15 will convert the 220V voltage input from the input port 16 into a 24V voltage at the output port 14 and then transmit it to the adjustable power temperature controller 20; after power is turned on, the adjustable power temperature controller 20 will control the ceramic heater 45 to generate heat, and its maximum surface temperature can reach 330°C. The heater transfers heat to the inert gas through the bottom of the inert gas protection chamber 43, thereby achieving temperature control of the inert gas. The inert gas absorbs heat from the hydrogen environment chamber 44 using the principle of heat transfer, thereby cooling the hydrogen; at the same time, the inert gas protection chamber temperature sensor 7 and the hydrogen environment chamber temperature sensor 12 also feed back the temperatures measured by the inert gas protection chamber 43 and the hydrogen environment chamber 44 to the thermostat 10. When the temperature deviation of the hydrogen environment chamber 44 and the inert gas protection chamber 43 is measured to exceed 2°C, the thermostat 10 will automatically cut off the power supply until the temperature difference is lower than 2°C, and then it will automatically be powered on; when the measured temperature is higher than the maximum temperature of -189.5°C, the thermostat 10 will automatically cut off the power supply, and the adjustable power temperature controller 20 will control the ceramic heating plate 45 to reduce the heating power until it is reduced to the range of -190.5°C to -189.5°C, and then the thermostat 10 will automatically be powered on; on the contrary, when the measured temperature is lower than the minimum temperature of -190.5°C, the thermostat 10 will continue to be powered on, and the adjustable power temperature controller 20 will control the ceramic heating plate 45 to increase the heating power. The heating power is increased until it reaches the range of -190.5℃ to -189.5℃; when the measured temperature is within the range of -190.5℃ to -189.5℃, the thermostat 10 continues to be powered on, and the adjustable power temperature controller 20 controls the ceramic heating plate 45 to maintain the heating power or reduce the power to zero (equivalent to disconnecting the power supply to stop heating); at the same time, the temperature control system needs to have high-temperature stability and accuracy. The glass fiber protective layer 54 effectively reduces the heat transfer between the inside of the device and the surrounding environment, thereby having an insulation effect on the device, ensuring that the device can maintain a stable temperature at low temperatures and meet the requirements of the experiment. Low-temperature control automatically controls the on and off of the power supply by the thermostat 10 and the heating power of the ceramic heating plate 45 by the adjustable power temperature controller 20 to keep the device within the range of -190.5℃ to -189.5℃.

[0075] High-pressure control: Inert gas chamber control. When conducting experiments under low-temperature conditions, the temperature control system must be able to precisely control the accuracy of the device in the low-temperature environment. Therefore, the inert gas tank 32 is filled with liquid nitrogen. The inert gas chamber pressure controller 30 is set to a maximum pressure of 0.51 MPa and a minimum pressure of 0.49 MPa.

[0076] When it is detected that the pressure of the inert gas in the inert gas protection chamber 43 exceeds the set maximum pressure of 0.51 MPa, the inert gas protection chamber pressure controller 30 will control the inert gas protection chamber solenoid valve 29 to open. The inert gas protection chamber solenoid valve 29 will not be closed until the pressure of the inert gas drops to the set pressure range of 0.49 MPa to 0.51 MPa. The discharged inert gas will be recovered to the waste gas recovery tank 27 through the inert gas protection chamber exhaust port 31.

[0077] When it is detected that the pressure of the inert gas in the inert gas protection chamber 43 is lower than the set minimum pressure of 0.49 MPa, the inert gas protection chamber pressure controller 30 will control the inert gas protection chamber solenoid valve 2 33 to open, and the inert gas in the inert gas tank 32 will flow into the inert gas protection chamber 43 along the inert gas protection chamber air inlet 34 until the pressure of the inert gas rises to within the set pressure range of 0.49 MPa to 0.51 MPa. At this time, the inert gas protection chamber solenoid valve 2 33 will close, thereby ensuring the pressure control of the inert gas in the inert gas protection chamber 43.

[0078] By controlling the inlet and outlet flow of the inert gas, the inert gas protection chamber pressure controller 30 can accurately adjust the pressure of the inert gas protection chamber 43 within the range of 0.49 MPa to 0.51 MPa, ensuring the stability of the inert gas pressure and thus protecting and cooling the hydrogen environment chamber 44.

[0079] Mechanical properties test: First, connect the upper connector 1 to the mechanical properties testing machine, set the test parameters of the mechanical properties testing machine, set the maximum load to 5000N, the displacement to 1.6mm, and the loading speed to 0.1mm / min; then start the mechanical properties testing machine, and transmit the load to the load sensor 27 through the upper connector 1. The load sensor 27 is connected to the punch 55 through the connecting block 54 and the pin hole 60 and pushes the ceramic ball 59 to move toward the micro sample 58, so that the ceramic ball 59 acts on the micro sample 58, thereby realizing the mechanical properties test of the small punching micro sample in a hydrogen environment. When the ceramic ball 59 applies force to the micro sample 58, the load sensor 27 will feed back the load it receives to the computer in real time, and the mechanical properties testing machine will also feed back its own displacement to the computer in real time. The load received by the load sensor 27 is the load received by the sample 58, and the mechanical properties testing machine will also feed back its own displacement to the computer in real time. The load received by the load sensor 27 is the load received by the sample 58, and the mechanical properties testing machine will also feed back its own displacement as the loading displacement received by the sample 58, thereby obtaining the load-displacement data of the sample 58.

[0080] End of Experiment: After completing the required low-temperature, high-pressure mechanical property tests, the temperature control system is turned off, and the chamber temperature is allowed to rise to room temperature. Once the corresponding chamber temperatures, as measured by the hydrogen environment chamber 12 and the inert gas protection chamber temperature sensors 7, have dropped to room temperature, the second solenoid valve 26 and the inert gas protection chamber solenoid valve 1 29 are opened, allowing hydrogen and inert gas to slowly flow into the exhaust gas recovery tank 27 through the hydrogen environment chamber exhaust port 25 and the inert gas protection chamber exhaust port 31, respectively.

[0081] Therefore, through the above-mentioned multiple embodiments under different temperatures and pressures, the mechanical testing device of the present invention has the following beneficial effects:

[0082] The use of a small-volume hydrogen environment chamber 43 has high safety: by designing a small punched micro-sample device with a hydrogen environment through-hole 57, the hydrogen environment chamber 43 ensures sufficient contact between the micro-sample 58 and hydrogen, and the small-volume hydrogen environment chamber 43 has the advantage of safety in use. Traditional hydrogen environment chambers 43 often pose risks due to their large size, and this device solves this problem, so it can be safely promoted and applied, providing protection for the safe application of test equipment.

[0083] High-precision controllable temperature and pressure: The coordinated use of a temperature control system, pressure control system, and sensor system enables high-precision mechanical property testing under controllable temperature and pressure conditions. The temperature control system maintains a stable temperature for the micro-specimen, the pressure control system monitors and adjusts the device's hydrogen and inert gas pressures in real time, and the sensor system monitors load, temperature, and pressure changes in real time, providing accurate and reliable test data. This enables the device to accurately assess the mechanical properties of materials and deliver reliable test results in a hydrogen environment, providing important data support for materials research and engineering applications.

[0084] Reliable Sealing: The small hydrogen chamber 43's sealing system and hydrogen leak alarm system ensure excellent sealing and safety in hydrogen environments, preventing hydrogen leakage and interference from external gas impurities. This is crucial for conducting mechanical property tests at stable temperature and pressure for extended periods, ensuring reliable sealing during testing.

[0085] Broad application prospects: This device has broad application prospects in the field of mechanical property research and testing in hydrogen environments. With the development and application of hydrogen energy technology, the demand for accurate evaluation of the mechanical properties of materials and equipment in hydrogen environments is increasing. The mechanical property testing device provided by the present invention can meet this demand and provide reliable support for the development of new energy technologies.

[0086] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0087] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of this utility model. The technical scope of this utility model is not limited to the content of the specification and must be determined according to the scope of the claims.

Claims

1. A micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment, characterized in that: The invention at least comprises a hydrogen environment micro-sample loading system and a hydrogen environment chamber (43) arranged in the hydrogen environment chamber loading system. A micro-sample (48) is arranged in the hydrogen environment chamber (43) so that a force load can be applied to the micro-sample (48) via the micro-sample loading system, and the mechanical property change parameters of the micro-sample (48) in the hydrogen environment chamber (43) with controllable temperature and controllable pressure are obtained.

2. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 1, characterized in that: The micro-specimen loading system at least comprises a connecting block (54), a punch rod (55) and a ceramic ball (59); the punch rod (55) is connected to a load sensor (47) via the connecting block (54); the ceramic ball (59) is arranged between the punch rod (55) and the micro-specimen (58); the punch rod (55) is suitable for pushing the ceramic ball (59) to act on the micro-specimen (58), and obtaining load displacement data of the micro-specimen (58) in a hydrogen environment via the load sensor (47).

3. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 2, characterized in that: The hydrogen environment cavity is a small-volume hydrogen environment cavity (44), and a hydrogen environment through hole (57) is arranged on the other side of the micro-sample (58) opposite to the ceramic ball (59), a hydrogen tank (23) and a waste gas recovery tank (27). A hydrogen inlet (24) and an exhaust port (25) are provided in the small-volume hydrogen environment cavity (44). The hydrogen inlet (24) is connected to the hydrogen tank (23), and the exhaust port (25) is connected to the waste gas recovery tank (27). The hydrogen environment through hole (57) is suitable for introducing hydrogen into the space where the micro-sample (58) is located, so that the micro-sample (58) is fully in contact with the hydrogen.

4. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 3, characterized in that: An inert gas protection chamber (43) is provided outside the hydrogen environment chamber (44), and the inert gas protection chamber (43) is suitable for heat exchange with the hydrogen environment chamber (44).

5. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 4, characterized in that: The micro-specimen mechanical property testing device also includes a hydrogen environment integrated control system, which includes a temperature control system, a pressure control system and a sensor system. The temperature control system and the pressure control system are both connected to the hydrogen environment chamber (44) and the inert gas protection chamber (43) so as to be able to control the temperature and pressure in the hydrogen environment chamber (44) and the inert gas protection chamber (43) respectively. The sensor system is connected to the temperature control system and the pressure control system so as to be able to monitor the load, temperature and pressure parameters in the hydrogen environment chamber (44) and the inert gas protection chamber (43).

6. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 5, characterized in that: The temperature control system comprises a temperature controller (10), a temperature display screen (9) and a probe plug (8). The probe plug (8) is suitable for being connected to a temperature sensor for detecting the temperature in the inert gas protection chamber (43) and the hydrogen environment chamber (44) so ​​as to be able to monitor the temperature in the inert gas protection chamber (43) and the hydrogen environment chamber (44). The temperature controller (10) is also connected to a transformer (15) so as to be able to control the on and off of the transformer (15) via the temperature controller (10).

7. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 6, characterized in that: The transformer (15) is also connected to an adjustable power temperature controller (20), and a ceramic heating plate (45) connected to the adjustable power temperature controller (20), wherein the ceramic heating plate (45) is arranged at the bottom of the inert gas protection chamber (43), and the ceramic heating plate (45) is suitable for heating the inert gas in the inert gas protection chamber (43), and the ceramic heating plate (45) is also connected to a gasket-type thermocouple (46), and the gasket-type thermocouple (46) is connected to the adjustable power temperature controller (20) so as to be able to feed back the temperature of the ceramic heating plate (45) and display it via a heating plate temperature display screen (19) arranged on the adjustable power temperature controller (20).

8. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 5, characterized in that: A pressure control system is provided in the hydrogen environment chamber (43) and the inert gas protection chamber (44), wherein: The pressure control system comprises a hydrogen environment chamber pressure controller (28), and a first solenoid valve (22) and a second solenoid valve (26) connected to the hydrogen environment chamber pressure controller (28), wherein the first solenoid valve (22) is arranged at the hydrogen gas inlet (24), and the second solenoid valve (26) is arranged at the gas outlet (25), so that the opening and closing of the first solenoid valve (22) and the second solenoid valve (26) can be controlled respectively by the hydrogen environment chamber pressure controller (28), thereby controlling the pressure in the hydrogen environment chamber (44). The pressure control system further comprises an inert gas protection chamber pressure controller (30), and an inert gas protection chamber solenoid valve 1 (29) and an inert gas protection chamber solenoid valve 2 (33) connected to the inert gas protection chamber pressure controller (30); the inert gas protection chamber solenoid valve 2 (33) is arranged at the inert gas chamber air inlet (34), and the inert gas protection chamber solenoid valve 1 (29) is arranged at the inert gas protection chamber exhaust port (31), so that the inert gas protection chamber pressure controller (30) can control the opening and closing of the inert gas protection chamber solenoid valve 1 (29) and the inert gas protection chamber solenoid valve 2 (33) respectively, thereby controlling the pressure in the inert gas protection chamber (44).

9. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 4, characterized in that: The micro-specimen mechanical property testing device also includes a sealing system, which includes a plurality of sealing rings and sealing ring buckles for fixing each of the sealing rings. The plurality of sealing rings are respectively arranged at the connection between the hydrogen environment chamber column (3) of the hydrogen environment chamber (43), the inert gas protection chamber column (4) and the upper joint (1), and a hydrogen environment chamber sealing gasket (50) is also arranged at the assembly connection of the hydrogen environment chamber (44), and an inert gas protection chamber sealing gasket (41) is arranged at the assembly connection of the inert gas protection chamber (43) to limit relative sliding between the hydrogen environment chamber column (3), the inert gas protection chamber column (4) and the upper joint (1) to generate gas leakage.

10. The micro-specimen mechanical properties testing device in a controllable temperature and controllable pressure hydrogen environment according to claim 9, characterized in that: The micro-specimen mechanical property testing device also includes an alarm system, which includes a first pressure alarm (35) inserted deep into the inert gas protection chamber (43) and a second pressure alarm (36) inserted deep into the hydrogen environment chamber (44). The first pressure alarm (35) is suitable for obtaining pressure changes in the inert gas protection chamber (43), and the second pressure alarm (36) is suitable for obtaining pressure changes in the hydrogen environment chamber (44). The first pressure alarm (35) and the second pressure alarm (36) are suitable for issuing an alarm when the pressure suddenly changes or exceeds a set limit.

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