High-pressure hydrogen charging system of sample for metal material impact test

Abstract

The utility model discloses a high-pressure hydrogen filling system of a sample for a metal material impact test, which comprises a sample hydrogen filling container, a high-pressure recovery container, a low-pressure recovery container, a waste gas tank, a plurality of manual valves, a pressure monitoring device and a hydrogen purity monitoring device which are connected with one another through a process pipeline, the pressure monitoring device is used for monitoring system pressure, and the hydrogen purity monitoring device is used for monitoring hydrogen purity in the pipeline. The utility model provides a movable sample hydrogen charging system, which simulates the service state of a high-pressure hydrogen-contacting equipment material, ensures that enough diffusible hydrogen exists in the material, simultaneously controls the use amount of hydrogen, recycles the used hydrogen, avoids unsafe factors caused by hydrogen emission, can meet the requirement of carrying out an impact test on a metal material under a hydrogen charging condition, and is high in practicability. And a convenient method is provided for metal material hydrogen embrittlement research.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy metal material impact testing, and particularly relates to a high-pressure hydrogen charging system for samples used in metal material impact testing. Background Art

[0002] Impact testing studies a material's resistance to dynamic loads. Unlike static loads, the rapid loading speed causes a sudden increase in stress within the material, and the rate of deformation affects the material's structural properties. Consequently, the material exhibits a different response to dynamic loads, often exhibiting excellent plasticity under static loads but exhibiting brittle properties under impact loads. Impact testing of metal materials can also reveal the influence of structural features and operating conditions on mechanical properties that are not readily apparent under static loads (such as stress concentrations, internal material defects, chemical composition, loading temperature, stress state, and heat treatment). Therefore, impact testing is valuable in process analysis and scientific research. Traditional metal impact testing machines lack explosion-proof technology and cannot be used in hydrogen-related laboratories requiring such technology. Furthermore, traditional physical and chemical laboratories do not meet explosion-proof requirements and cannot perform high-pressure hydrogen charging on test samples to simulate the material's behavior under high-pressure hydrogen conditions. High-pressure hydrogen environment material performance testing systems, equipped with high-pressure hydrogen chambers, can simulate the service conditions of materials in high-pressure hydrogen-containing equipment. However, hydrogen emissions pose unsafe risks. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a high-pressure hydrogen charging system for samples used in metal material impact tests, so as to solve the deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical solutions:

[0005] A high-pressure hydrogen filling system for samples for impact testing of metal materials is provided, which includes a system body, wherein the system body includes a sample hydrogen filling container, a high-pressure recovery container, a low-pressure recovery container, an exhaust gas tank, a first manual valve, a second manual valve, a third manual valve, a fourth manual valve, a pressure reducing valve, a fifth manual valve, a sixth manual valve, a seventh manual valve, a pressure monitoring device and a hydrogen purity monitoring device, which are interconnected through a process pipeline. The first manual valve, the exhaust gas tank, the second manual valve, the third manual valve, the sample hydrogen filling container and the fourth manual valve are connected in sequence, the fifth manual valve, the low-pressure recovery container, the sixth manual valve, the seventh manual valve and the high-pressure recovery container are connected in sequence, the pressure reducing valve is connected across the second manual valve and the sixth manual valve, the pressure monitoring device is used to monitor the system pressure, and the hydrogen purity monitoring device is used to monitor the hydrogen purity in the pipeline.

[0006] As described in the high-pressure hydrogen filling system for samples used for impact testing of metal materials, wherein the pressure monitoring device includes a first pressure gauge, a second pressure gauge, a third pressure gauge and a fourth pressure gauge, the first pressure gauge is arranged between the first manual valve and the waste gas tank, the second pressure gauge is arranged between the third manual valve and the sample hydrogen filling container, the third pressure gauge is arranged between the fifth manual valve and the low-pressure recovery container, and the fourth pressure gauge is arranged between the seventh manual valve and the high-pressure recovery container.

[0007] As described in the high-pressure hydrogen filling system for samples used for impact testing of metal materials, the hydrogen purity monitoring device includes a first hydrogen purity sensor and a second hydrogen purity sensor, the first hydrogen purity sensor is arranged between the exhaust gas tank and the second manual valve, and the second hydrogen purity sensor is arranged between the pressure reducing valve and the sixth manual valve.

[0008] For example, in the high-pressure hydrogen filling system for samples used in metal material impact testing, the sample hydrogen filling container includes a cover body, and the cover body is provided with a plurality of sample card slots.

[0009] The high-pressure hydrogen filling system for samples used in metal material impact tests may further include a movable bracket, a pulley is provided at the bottom of the movable bracket, and the system body is fixed on the movable bracket.

[0010] The beneficial effects of the technical solution of this utility model are:

[0011] A movable sample hydrogen charging system is provided to simulate the service status of high-pressure hydrogen equipment materials, ensure sufficient diffusible hydrogen inside the material, control the hydrogen consumption, and recycle the hydrogen after use to avoid unsafe factors caused by hydrogen emissions. It can solve the need for impact testing of metal materials under hydrogen charging conditions and provide a convenient method for the study of hydrogen embrittlement of metal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To further illustrate the above-mentioned purpose, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the system logic structure of a preferred embodiment of the utility model;

[0014] In the figure: 1. Sample hydrogen filling container; 2. High-pressure recovery container; 3. Low-pressure recovery container; 4. Waste gas tank; 5. First manual valve; 6. Second manual valve; 7. Third manual valve; 8. Fourth manual valve; 9. Pressure reducing valve; 10. Fifth manual valve; 11. Sixth manual valve; 12. Seventh manual valve; 13. First pressure gauge; 14. Second pressure gauge; 15. Third pressure gauge; 16. Fourth pressure gauge; 17. First hydrogen purity sensor; 18. Second hydrogen purity sensor. DETAILED DESCRIPTION

[0015] The terms "utility model" and "the present invention" as used in this specification are intended to refer broadly to all subject matter of this specification and any patent claims below. Statements containing these terms should not be understood to limit the subject matter described herein or to limit the meaning or scope of any patent claim below. In addition, this specification does not attempt to describe or limit the subject matter covered by any claim of any specific component, paragraph, statement or figure of this application. The subject matter should be understood with reference to the entire specification, all drawings and any claims below. The present invention may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be considered as limiting.

[0016] The details of the present invention will now be discussed with reference to the accompanying drawings which illustrate the present invention by way of example only. In the accompanying drawings, similar features or components may be marked with the same reference numerals.

[0017] The use of "including," "having," and "comprising" and variations thereof herein is intended to encompass the items listed thereafter and equivalents thereof, as well as additional items. Although reference may be made to directions such as above, below, upward, downward, rearward, bottom, top, front, and rear in describing the drawings, for convenience, reference is made relative to the drawings. These directions are not intended to literally define or limit the present invention in any manner. Furthermore, terms such as "first," "second," and "third" are used herein for descriptive purposes and are not intended to indicate or imply importance or significance.

[0018] See Figure 1 As shown, the high-pressure hydrogen filling system for samples for impact testing of metal materials of the present invention includes a system body, which includes a sample hydrogen filling container 1, a high-pressure recovery container 2, a low-pressure recovery container 3, an exhaust gas tank 4, a first manual valve 5, a second manual valve 6, a third manual valve 7, a fourth manual valve 8, a pressure reducing valve 9, a fifth manual valve 10, a sixth manual valve 11, a seventh manual valve 12, a pressure monitoring device and a hydrogen purity monitoring device, which are interconnected through a process pipeline. The first manual valve 5, the exhaust gas tank 4, the second manual valve 6, the third manual valve 7, the sample hydrogen filling container 1 and the fourth manual valve 8 are connected in sequence, the fifth manual valve 10, the low-pressure recovery container 3, the sixth manual valve 11, the seventh manual valve 12 and the high-pressure recovery container 2 are connected in sequence, the pressure reducing valve 9 is connected across the second manual valve 6 and the sixth manual valve 11, the pressure monitoring device is used to monitor the system pressure, and the hydrogen purity monitoring device is used to monitor the hydrogen purity in the pipeline.

[0019] The pressure monitoring device includes a first pressure gauge 13, a second pressure gauge 14, a third pressure gauge 15 and a fourth pressure gauge 16. The first pressure gauge 13 is arranged between the first manual valve 5 and the exhaust gas tank 4, the second pressure gauge 14 is arranged between the third manual valve 7 and the sample hydrogen filling container 1, the third pressure gauge 15 is arranged between the fifth manual valve 10 and the low-pressure recovery container 3, and the fourth pressure gauge 16 is arranged between the seventh manual valve 12 and the high-pressure recovery container 2.

[0020] The hydrogen purity monitoring device includes a first hydrogen purity sensor 17 and a second hydrogen purity sensor 18 . The first hydrogen purity sensor 17 is arranged between the exhaust gas tank 4 and the second manual valve 6 , and the second hydrogen purity sensor 18 is arranged between the pressure reducing valve 9 and the sixth manual valve 11 .

[0021] The sample hydrogen filling container 1 comprises a cover body, on which a plurality of sample card slots are provided, preferably four sample card slots arranged in a cross shape.

[0022] The system also includes a mobile bracket with pulleys at the bottom. The system body is fixed on the mobile bracket. All the equipment in the system is fixed on the mobile bracket. Figure 1 The upper and lower relationships are arranged as shown.

[0023] Continue to read Figure 1 , the high-pressure hydrogen charging methods for samples used in impact tests of relevant metal materials include:

[0024] S1. Complete the gas replacement of the sample high-pressure hydrogen filling system, fill the sample hydrogen filling container with hydrogen and pressurize it to the required pressure;

[0025] S2. Use a vacuum pump to evacuate the high-pressure recovery container, the low-pressure recovery container, the waste gas tank and the connecting pipelines;

[0026] S3. Move the sample high-pressure hydrogen filling system to the vicinity of the impact testing machine in the physical and chemical laboratory. After the pressure holding time is reached, discharge the hydrogen in the sample hydrogen filling container into the high-pressure recovery container. Open the fastening bolts of the sample hydrogen filling container and discharge the remaining hydrogen into the low-pressure recovery container.

[0027] S4. Introduce nitrogen into the sample hydrogen filling container to exhaust the remaining hydrogen, and discharge the waste gas into the waste gas tank. Open the quick-open caliper of the sample hydrogen filling container cover, take out the sample and conduct a material impact test.

[0028] Specifically:

[0029] a. Place the metal material impact test sample in the sample slot on the cover of the sample hydrogen filling container 1, and then seal the sample hydrogen filling container 1;

[0030] b. Close the fourth manual valve 8, the fifth manual valve 10, and the first manual valve 5, and open the third manual valve 7, the pressure reducing valve 9, the seventh manual valve 12, the sixth manual valve 11, and the second manual valve 6. Connect the pipeline at the fifth manual valve 10 to the vacuum pump, open the fifth manual valve 10 to evacuate the system, and use the first pressure gauge 13, the second pressure gauge 14, the third pressure gauge 15, and the fourth pressure gauge 16 to confirm that the system pressure is not higher than 10 -1 Pa;

[0031] c. Close the fifth manual valve 10, connect the pipeline at the fourth manual valve 8 to the gas replacement and pressurization system, and introduce nitrogen into the system;

[0032] d. Close the fourth manual valve 8, open the fifth manual valve 10, start the vacuum pump to evacuate the system, and confirm that the system pressure is not higher than 10 by using the first pressure gauge 13, the second pressure gauge 14, the third pressure gauge 15, and the fourth pressure gauge 16. -1 Pa;

[0033] e. Close the fifth manual valve 10, the third manual valve 7, the pressure reducing valve 9, the seventh manual valve 12, the sixth manual valve 11, and the second manual valve 6, and open the fourth manual valve 8 to introduce hydrogen into the sample hydrogen filling container 1. Use the second pressure gauge 14 to confirm that the pressure reaches the required pressure;

[0034] f. Close the fourth manual valve 8, cut off the connection between the pipeline at the fourth manual valve 8 and the gas replacement and pressurization system, cut off the connection between the pipeline at the fifth manual valve 10 and the vacuum pump, and move the sample hydrogen filling system to the vicinity of the impact testing machine in the physical and chemical laboratory;

[0035] g. After the pressure holding time reaches the preset time, open the third manual valve 7 and the seventh manual valve 12, adjust the pressure relief rate of the sample hydrogen filling container 1 through the pressure reducing valve, and record the reading of the second hydrogen purity sensor 18 at the same time. After the readings of the second pressure gauge 14 and the fourth pressure gauge 16 are consistent, close the seventh manual valve 12;

[0036] h. Open the sixth manual valve 11, adjust the pressure reducing valve 9 to control the pressure relief rate of the sample hydrogen filling container 1, loosen the fastening bolts of the cover of the sample hydrogen filling container 1, keep the quick release caliper of the cover of the sample hydrogen filling container 1 closed, and after the readings of the second pressure gauge 14 and the third pressure gauge 16 are consistent, close the sixth manual valve 11 and the pressure reducing valve 9;

[0037] i. Open the second manual valve 6, connect the pipeline at the fourth manual valve 8 to the nitrogen cylinder, open the fourth manual valve 8, and introduce nitrogen into the sample hydrogen filling container 1. Observe the first hydrogen purity sensor 17. When it is determined that the hydrogen concentration is lower than the preset value, close the third manual valve 7 and the fourth manual valve 8, open the quick-release caliper of the cover of the sample hydrogen filling container 1, open the cover of the sample hydrogen filling container 1, remove the sample, and quickly perform a material impact test.

[0038] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure hydrogen charging system for metal material impact test samples, characterized in that: The system comprises a system body, which includes a sample hydrogen filling container, a high-pressure recovery container, a low-pressure recovery container, a waste gas tank, a first manual valve, a second manual valve, a third manual valve, a fourth manual valve, a pressure reducing valve, a fifth manual valve, a sixth manual valve, a seventh manual valve, a pressure monitoring device and a hydrogen purity monitoring device interconnected through a process pipeline. The first manual valve, the waste gas tank, the second manual valve, the third manual valve, the sample hydrogen filling container and the fourth manual valve are connected in sequence, the fifth manual valve, the low-pressure recovery container, the sixth manual valve, the seventh manual valve and the high-pressure recovery container are connected in sequence, the pressure reducing valve is connected across the second manual valve and the sixth manual valve, the pressure monitoring device is used to monitor the system pressure, and the hydrogen purity monitoring device is used to monitor the hydrogen purity in the pipeline.

2. The high-pressure hydrogen charging system for metal material impact test samples according to claim 1, characterized in that: The pressure monitoring device includes a first pressure gauge, a second pressure gauge, a third pressure gauge and a fourth pressure gauge. The first pressure gauge is arranged between the first manual valve and the waste gas tank, the second pressure gauge is arranged between the third manual valve and the sample hydrogen filling container, the third pressure gauge is arranged between the fifth manual valve and the low-pressure recovery container, and the fourth pressure gauge is arranged between the seventh manual valve and the high-pressure recovery container.

3. The high-pressure hydrogen charging system for metal material impact test samples according to claim 1, characterized in that: The hydrogen purity monitoring device includes a first hydrogen purity sensor and a second hydrogen purity sensor. The first hydrogen purity sensor is arranged between the exhaust gas tank and the second manual valve, and the second hydrogen purity sensor is arranged between the pressure reducing valve and the sixth manual valve.

4. The high-pressure hydrogen charging system for metal material impact test samples according to claim 1, characterized in that: The sample hydrogen filling container comprises a cover body, and the cover body is provided with a plurality of sample card slots.

5. The high-pressure hydrogen charging system for metal material impact test samples according to claim 1, characterized in that: It also includes a movable bracket, a pulley is provided at the bottom of the movable bracket, and the system body is fixed on the movable bracket.

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