Hydrogen embrittlement experiment device with automatic acid discharge function

Abstract

The utility model belongs to the field of hydrogen embrittlement detection. The utility model provides a hydrogen embrittlement experiment device with an automatic acid discharge function, aiming at solving the problem that an existing device cannot discharge acid liquor in time when a sample is broken. The device comprises a solution tank, a hydrogen embrittlement bending mechanism and a controller. And the solution tank comprises an acid liquid chamber for containing acid liquid and an automatic acid discharge valve for communicating the acid liquid chamber with the outside. The hydrogen embrittlement bending mechanism is placed in the acid liquid chamber during use, the hydrogen embrittlement bending mechanism comprises a clamp and a pressure sensor, the clamp is used for clamping a to-be-detected sample and applying stress to the sample to bend the sample, and the pressure sensor is used for detecting the restoring force of the sample for resisting bending. The controller is in communication connection with the pressure sensor and the automatic acid discharge valve, and the controller controls the automatic acid discharge valve to be opened based on the restoring force. When the device judges that the sample is fractured, the automatic acid discharge valve is immediately opened to discharge acid liquor, so that the fracture is prevented from being further corroded by the acid liquor, and the integrity of the fracture of the sample is ensured.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen embrittlement detection, in particular to a hydrogen embrittlement experimental device with an automatic acid discharge function. Background Art

[0002] Hydrogen embrittlement occurs when a material becomes brittle due to the intrusion of hydrogen atoms in a hydrogen-containing environment, leading to fracture at stresses far below its normal strength. Hydrogen embrittlement, also known as hydrogen-induced cracking or hydrogen damage, can cause a significant decrease in the material's mechanical properties, particularly plasticity, and can lead to cracking or damage.

[0003] The hydrogen embrittlement bend test is a method used to evaluate a material's hydrogen embrittlement sensitivity. This method applies strain to the material's surface using a four-point bending device. The material is then immersed in a specific acid solution under corrosive conditions. The time it takes for the specimen to fracture after immersion is used to assess the material's resistance to hydrogen embrittlement.

[0004] Patent CN116399721A discloses a hydrogen embrittlement sensitivity test device for high-strength metal materials. The device includes a solution tank, a sample holder within the tank, and a fracture test area on the sample holder; a downward pressure assembly is located above the sample holder, with the working portion of the downward pressure assembly facing the fracture test area. The patent also discloses a hydrogen embrittlement sensitivity evaluation method, which primarily analyzes the end face of a metal sample after hydrogen embrittlement fracture, measuring the maximum and minimum hydrogen diffusion depths, total area, and hydrogen diffusion area of ​​the fracture end face; and then calculating the hydrogen embrittlement sensitivity coefficient of the metal sample. However, the device is unable to promptly remove the acid solution when the sample fractures. Since there are usually no signs of sample fracture before the sample fractures, and the experimental period is generally long, by the time the experimenter discovers the sample fracture, the fracture surface has often been corroded by the acid solution, which is not conducive to subsequent fracture analysis.

[0005] Therefore, in order to better observe the fracture surface of the bending hydrogen embrittlement experiment, avoid the fracture surface from being corroded and damaged by acid, and provide more accurate experimental materials for studying the hydrogen embrittlement mechanism, a hydrogen embrittlement experimental device with automatic acid discharge function is urgently needed. Utility Model Content

[0006] The main purpose of the utility model is to provide a hydrogen embrittlement testing device with an automatic acid discharge function.

[0007] According to one aspect of the present invention, a hydrogen embrittlement test device with an automatic acid removal function is provided, comprising:

[0008] A solution tank, comprising an acid chamber for containing acid and an automatic acid discharge valve for enabling the acid chamber to communicate with the outside;

[0009] A hydrogen embrittlement bending mechanism, which is placed in the acid chamber when in use and includes a clamp and a pressure sensor. The clamp is used to clamp the sample to be tested and apply stress to the sample to bend the sample. The pressure sensor is used to detect the restoring force of the sample against bending.

[0010] A controller is communicatively connected with the pressure sensor and the automatic acid discharge valve, and the controller controls the automatic acid discharge valve to open based on the restoring force.

[0011] According to one embodiment of the present invention, the solution tank further includes a manual acid discharge valve.

[0012] According to an embodiment of the present invention, a plurality of partitions are further provided in the solution tank, and the plurality of partitions separate the solution tank into a plurality of independent acid solution chambers.

[0013] According to one embodiment of the present invention, each of the acid chambers is provided with an automatic acid discharge valve and / or a manual acid discharge valve.

[0014] According to one embodiment of the present utility model, a mounting piece for mounting the hydrogen embrittlement bending mechanism is further provided in the acid liquid chamber.

[0015] According to an embodiment of the present invention, the clamp includes a main body and a pressure-applying component, the main body has a recess for placing the sample to be tested, and the pressure-applying component can apply pressure to the sample from one side of the sample.

[0016] According to one embodiment of the present invention, the main body includes:

[0017] a pair of side extensions disposed opposite and spaced apart from each other;

[0018] a connecting portion that spans and connects the first ends of the pair of side extensions;

[0019] A pair of supporting claws are provided at the second ends of the pair of side extensions, and the pair of supporting claws extend toward each other with a predetermined size interval therebetween.

[0020] According to an embodiment of the present invention, the connecting portion is provided with a groove on a side close to the supporting claw, and the pressure applying component is arranged in the groove.

[0021] According to one embodiment of the present invention, the pressure component includes a pressure block and a pressure rod, the connecting portion is provided with a positioning hole, the pressure rod is installed in the positioning hole to maintain the position of the pressure block relative to the main body, and the pressure sensor is arranged between the pressure block and the pressure rod.

[0022] According to one embodiment of the present invention, the pressure block is provided with at least one pair of first support rollers protruding outward toward the corresponding support claws at the bending corners on one side close to the support claws, and a pair of support claws are provided with at least one second support roller protruding outward toward the pressure block at the bending corners close to the pressure block, and the intervals between the at least one pair of first support rollers and the support claws are relative.

[0023] Due to the adoption of the above technical scheme, the hydrogen embrittlement experimental device with automatic acid discharge function according to the utility model is provided with a pressure sensor. When the sample breaks, the pressure detected by the pressure sensor will drop significantly in a short time, even close to zero. The controller determines that the sample is broken based on the monitored pressure change. When the sample is judged to be broken, the automatic acid discharge valve is immediately opened to discharge the acid to avoid further corrosion of the fracture by the acid. No manual operation is required, and the integrity of the sample fracture is guaranteed, which has great scientific research utilization value. The hydrogen embrittlement experimental device with automatic acid discharge function according to the utility model is also very versatile. For example, the conventional experimental device can be simply modified, such as replacing the conventional acid discharge valve with an automatic acid discharge valve, replacing the ordinary pressure block with a pressure sensor, and adding a set of control equipment to achieve the effect of automatic control of acid discharge. Or, when the fracture does not need to be observed in the experiment, the automatic acid discharge valve is replaced with an ordinary manual acid discharge valve, and the clamp is replaced with an ordinary clamp. The modification is simple and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0025] Figure 1 A side view of a hydrogen embrittlement testing device with an automatic acid discharge function according to an embodiment of the present invention is shown;

[0026] Figure 2 Another view of a hydrogen embrittlement testing device with an automatic acid discharge function according to an embodiment of the present invention is shown;

[0027] Figure 3 A simplified structural diagram of a hydrogen embrittlement bending mechanism according to an embodiment of the present utility model is shown.

[0028] Description of Reference Numerals

[0029] 10. Solution tank; 11. Acid chamber; 12. Automatic acid drain valve; 13. Manual acid drain valve; 13a. Upper manual acid drain valve; 13b. Lower manual acid drain valve; 14. Partition; 15. Mounting part; 16. Base; 20. Hydrogen embrittlement bending mechanism; 21. Clamp; 22. Pressure sensor; 23. Main body; 23a. Side extension; 23b. Connecting part; 23c. Support claw; 24. Pressing block; 25. Pressure rod; 26. Second support roller; 30. Controller; 31. First signal line; 32. Second signal line; P, specimen. DETAILED DESCRIPTION

[0030] The following describes the specific embodiments of the present disclosure 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 disclosure and are not intended to limit the present disclosure.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains; the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention; for example, terms such as “length,” “width,” “up,” “down,” “left,” “right,” “front,” “back,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside” indicate directions or positions based on those shown in the accompanying drawings, which are for ease of description only and are not to be construed as limiting this technical solution.

[0032] The terms "including," "having," and any variations thereof in the specification and claims of this utility model and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the specification and claims of this utility model and the accompanying drawings are used to distinguish between different items, not to describe a particular order. "Multiple" means two or more, unless otherwise expressly specified.

[0033] In the specification and claims of this utility model and the above-mentioned description of the drawings, when an element is referred to as being “fixed to”, “mounted on”, “disposed on” or “connected to” another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as being “connected to” another element, it may be directly or indirectly connected to the other element.

[0034] Furthermore, references to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] One purpose of the utility model is to provide a hydrogen embrittlement testing device with an automatic acid discharge function. Figure 1 A side view of a hydrogen embrittlement testing device with an automatic acid discharge function according to an embodiment of the present invention is shown; Figure 2 Another view of a hydrogen embrittlement testing device with an automatic acid discharge function according to an embodiment of the present invention is shown.

[0036] like Figure 1-2 As shown, the hydrogen embrittlement experimental device with automatic acid discharge function generally includes a solution tank 10, a hydrogen embrittlement bending mechanism 20 and a controller 30.

[0037] The solution tank 10 is used to hold acid for conducting hydrogen embrittlement sensitivity testing of the sample. The solution tank 10 includes an acid chamber 11 for holding the acid and an automatic acid drain valve 12 that enables the acid chamber 11 to communicate with the outside. The solution tank 10 can be made of an acid-resistant acrylic plate so that the sample condition can be observed at any time. The solution tank 10 includes at least a bottom wall and four side walls. The area enclosed by the bottom wall and the four side walls can be used as the acid chamber 11, and its size and volume can be determined according to the size of the sample to be tested and the test requirements. In some embodiments, the solution tank 10 can also be equipped with a top cover, which is placed on the top opening of the solution tank 10 during the experiment to prevent the acid from volatilizing too quickly.

[0038] In some embodiments, the solution tank 10 is further provided with a plurality of partitions 14, which separate the solution tank 10 into a plurality of independent acid chambers 11. This makes each chamber independent of the others, thereby conserving acid and allowing for separate experiments based on the test or sample type, thereby improving equipment utilization. The partitions 14 can be made of acid-resistant acrylic sheet.

[0039] In some embodiments, in addition to being provided with an automatic acid drain valve 12, each acid chamber 11 of the solution tank 10 may also be provided with a manual acid drain valve 13. The connector sizes of the two valves are consistent and can be switched and installed at any time as needed. For example, the automatic acid drain valve 12 can be set at a position close to the bottom wall of the acid chamber 11, and the manual acid drain valve 13 can be set at a position close to the top of the acid chamber 11. When there is a lot of acid in the acid chamber 11, the efficiency of draining the acid only by relying on the automatic acid drain valve 12 may be low. At this time, the manual acid drain valve 13 can be opened as needed. However, the present disclosure is not limited to the above-disclosed setting method, and the specific installation positions of the automatic acid drain valve 12 and the manual acid drain valve 13 can be adjusted according to actual needs. For example, Figure 2 The leftmost acid chamber 11 is provided with two manual acid discharge valves 13, namely an upper manual acid discharge valve 13a and a lower manual acid discharge valve 13b.

[0040] In some embodiments, in order to allow enough space at the bottom of the device to install the acid drain valve, a foot 16 can be set below the bottom wall of the solution tank 10. The height of the foot 16 is higher than the height of the manual and automatic acid drain valves so that the solution tank 10 can be placed stably.

[0041] In some embodiments, the acid chamber 11 is further provided with a mounting member 15 for mounting the hydrogen embrittlement bending mechanism 20. Figure 1 In the example shown, the mounting member 15 is a positioning column. A mounting hole is provided on the main body of the hydrogen embrittlement bending mechanism 20. The positioning column is inserted into the mounting hole so that the hydrogen embrittlement bending mechanism 20 can remain in a stable position when immersed in acid solution.

[0042] The hydrogen embrittlement bending mechanism 20 is used to clamp the sample P to be tested, bend the sample P and detect the restoring force generated by the sample P. Figure 1 As shown, the hydrogen embrittlement bending mechanism 20 is placed in the acid chamber 11 when in use. Figure 3 The hydrogen embrittlement bending mechanism 20 mainly includes a clamp 21 and a pressure sensor 22. The clamp 21 is used to clamp the sample P to be tested and apply stress to the sample P to bend the sample P. The pressure sensor 22 is used to detect the restoring force of the sample P against bending.

[0043] like Figure 3 As shown, in a specific embodiment, the clamp 21 includes a main body 23 and a pressure-applying component. The main body 23 has a recess for placing the sample to be tested, and the pressure-applying component can apply pressure to the sample P from one side of the sample P.

[0044] The main body 23 may include a pair of side extensions 23a disposed opposite and spaced apart from each other, a connecting portion 23b spanning and connecting the first ends of the pair of side extensions 23a, and a pair of supporting claws 23c disposed at the second ends of the pair of side extensions 23a. The pair of supporting claws 23c extend toward each other with a predetermined spacing therebetween. This spacing not only provides space for bending and deformation of the specimen P but also facilitates assembly and disassembly of the specimen P.

[0045] The connecting portion 23b has a first side and a second side, and a pair of side extensions 23a and a pair of support claws 23c are both provided on the second side of the connecting portion 23b. The connecting portion 23b is provided with a groove in the middle portion of the second side, which is recessed toward the first side. The groove can accommodate at least a portion of the pressure component, and on the one hand, can position the pressure component, and on the other hand, can guide the movement path of the pressure component. Optionally, the portion of the connecting portion 23b located around the groove can protrude in a direction away from the first side to provide a more stable support for the pressure component. The connecting portion 23b can also be provided with a positioning hole in the center position in the transverse direction, which extends from the first side into the groove. The positioning hole can interact with a portion of the pressure component to fix the pressure component relative to the main body 23, which will be described in detail below.

[0046] The pressure-applying component may include a pressure block 24 and a pressure rod 25, wherein the pressure block 24 is disposed at the end of the pressure rod 25 near the second side. The pressure block 24 is a component that contacts the sample P to be tested and applies pressure to the sample P. The pressure rod 25 may be a stud, and the positioning hole on the connecting portion 23b may be a screw hole with an internal thread. The pressure rod 25 is assembled in the positioning hole, and the pressure rod 25 can be screwed to adjust the position of the pressure block 24 relative to the main body 23, and the threaded connection between the two can also be used to maintain the pressure block 24 in the set position, thereby maintaining the pressure applied by the pressure block 24 to the sample P.

[0047] Optionally, in some embodiments, the pressing block 24 is provided with at least one pair of first support rollers protruding outwards toward the corresponding support claws 23c at the corner of the side close to the support claws 23c. The first support rollers can be ceramic rollers. It is understandable that Figure 3 The structure shown is a plan view of the hydrogen embrittlement bending mechanism 20. In actual use, the main body 23 and the pressing block 24 have a certain thickness, and the thickness direction is perpendicular to the Figure 3 Therefore, the pressing block 24 can actually be a rectangular block, and its side close to the supporting claw 23c should have, for example, four corners. The axis of the pressure rod 25 can be used as the center line, and a cylindrical ceramic roller extending perpendicular to the paper direction can be provided on the left and right sides of the center line, so that the contact between the pressing block 24 and the sample P is line contact.

[0048] In some embodiments, the pressure sensor 22 can be arranged between the pressure block 24 and the pressure rod 25. When in use, the pressure block 24 is positioned by the pressure rod 25 to press the sample P to make it bend. The restoring force of the sample P acts on the pressure block 24, causing the pressure block 24 to push the pressure sensor 22 in the opposite direction. The pressure sensor 22 senses the pressure and transmits the signal to the controller 30.

[0049] The connecting portion 23b and the pair of supporting claws 23c are connected by a pair of side extensions 23a vertically (ie Figure 3 As shown in the vertical direction), there is a lateral (ie Figure 3 The lateral spacing can reserve space for the bending of the sample P. In some embodiments, each support claw 23c is provided with at least one second support roller 26 protruding toward the pressure block 24 at the bend near the pressure block 24. The second support roller 26 can specifically be a ceramic roller. Similar to the first support roller, the second support roller 26 can actually be a cylindrical ceramic roller extending along the entire thickness of the support claw 23c. For the first support roller and the second support roller located on the same side of the axis of the pressure rod 25, the distance between the first support roller and the axis of the pressure rod 25 is smaller, that is, the two first support rollers are actually opposite to the vacant area between the two second support rollers (i.e., the above-mentioned spacing). The four-point bending of the sample P is achieved by the two second support rollers and the two first support rollers.

[0050] The controller 30 is in communication with the pressure sensor 22 and the automatic acid discharge valve 12. Figure 2 , controller 30 can be connected to communication with pressure sensor 22 via first signal line 31, and is connected to communication with automatic acid discharge valve 12 via second signal line 32. Controller 30 judges whether sample P breaks based on the pressure information collected by pressure sensor 22. When there are multiple acid chambers 11, multiple groups of jacks can be set on controller 30, the input and output of each group can be controlled separately, and are respectively connected to the sensor and acid discharge valve in same acid chamber 11, to realize the separate control of the experiment in each acid chamber 11. The part related to circuit in this device all has special acid-proof or acid-proof protection. When sample P breaks, its force acting on pressure sensor 22 also can be unloaded in a short time, and the force that is finally fed back to pressure sensor 22 may be close to zero. Controller 30 can compare the pressure value collected with the threshold value of setting. When determining that pressure value is less than threshold value, controller 30 controls automatic acid discharge valve 12 to open, and carries out acid discharge.

[0051] When using the hydrogen embrittlement test device with automatic acid drainage according to the present invention, the sample P is first placed on the ceramic roller of the hydrogen embrittlement bending mechanism 20. Then, the position of the pressure rod 25 is adjusted using a dedicated device to load the sample P so that the deflection of the sample P meets the experimental requirements. After completing the sample preparation, the hydrogen embrittlement bending mechanism 20 is placed in the acid chamber 11, and the positioning post passes through the corresponding hole on the hydrogen embrittlement bending mechanism 20. The pressure sensor 22 is connected to the controller 30, and the automatic acid drainage valve 12 is connected to the controller 30. The acid outlet of the automatic acid drainage valve 12 is connected to the waste acid bucket via a hose. The prepared acid solution is then poured into the acid chamber 11 containing the sample P until the acid solution completely submerges the hydrogen embrittlement bending mechanism 20. Finally, the automatic acid addition device is installed, the top cover is closed, and the controller 30 settings are adjusted to begin the test.

[0052] When required acid solution is more or the test time is long, the automatic acid adding device can add more acid in the acid chamber 11.This moment, need to open manual acid discharge valve 13, manual acid discharge valve 13 accesses the waste acid bucket by flexible pipe, in order to avoid the automatic acid adding device causes acid solution to be too full and overflow.When sample fracture, pressure sensor 22 can collect pressure at once, determine that pressure is less than threshold value and judge sample fracture by controller 30, controller 30 opens automatic acid discharge valve 12, in time acid solution is discharged, guarantee as far as possible that fracture is not damaged by corrosion, thereby guarantee the integrity of experimental result, also be convenient to further analyze fracture mechanism.

[0053] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0055] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A hydrogen embrittlement test device with automatic acid removal function, characterized in that: include: A solution tank (10), the solution tank (10) comprising an acid chamber (11) for containing acid and an automatic acid discharge valve (12) for enabling the acid chamber (11) to communicate with the outside; A hydrogen embrittlement bending mechanism (20), the hydrogen embrittlement bending mechanism (20) being placed in the acid liquid chamber (11) when in use, the hydrogen embrittlement bending mechanism (20) comprising a clamp (21) and a pressure sensor (22), the clamp (21) being used to clamp a sample to be tested and apply stress to the sample to bend the sample, and the pressure sensor (22) being used to detect the restoring force of the sample against bending; A controller (30) is connected to the pressure sensor (22) and the automatic acid discharge valve (12) for communication, and the controller (30) controls the automatic acid discharge valve (12) to open based on the restoring force.

2. The hydrogen embrittlement test device with automatic acid removal function according to claim 1 is characterized in that: The solution tank (10) further comprises a manual acid discharge valve (13).

3. The hydrogen embrittlement test device with automatic acid removal function according to claim 1 is characterized in that: A plurality of partitions (14) are further provided in the solution tank (10), and the plurality of partitions (14) separate the solution tank (10) into a plurality of independent acid solution chambers (11).

4. The hydrogen embrittlement test device with automatic acid removal function according to claim 3 is characterized in that: Each of the acid liquid chambers (11) is provided with the automatic acid discharge valve (12) and / or the manual acid discharge valve (13).

5. The hydrogen embrittlement test device with automatic acid removal function according to claim 1 is characterized in that: A mounting member (15) for mounting the hydrogen embrittlement bending mechanism (20) is also provided in the acid liquid chamber (11).

6. The hydrogen embrittlement test device with automatic acid removal function according to claim 1 is characterized in that: The clamp (21) comprises a main body (23) and a pressure-applying component, wherein the main body (23) has a recess for placing a sample to be tested, and the pressure-applying component is capable of applying pressure to the sample from one side of the sample.

7. The hydrogen embrittlement test device with automatic acid removal function according to claim 6 is characterized in that: The main body (23) includes: A pair of side extensions (23a) arranged opposite to and spaced apart from each other; a connecting portion (23b) spanning and connecting the first ends of the pair of side extension portions (23a); A pair of supporting claws (23c) are provided at the second ends of the pair of side extension portions (23a), and the pair of supporting claws (23c) extend toward each other with a predetermined size interval therebetween.

8. The hydrogen embrittlement test device with automatic acid removal function according to claim 7 is characterized in that: The connecting portion (23b) is provided with a groove on a side close to the supporting claw (23c), and the pressure-applying component is arranged in the groove.

9. The hydrogen embrittlement test device with automatic acid removal function according to claim 8, characterized in that: The pressure component includes a pressure block (24) and a pressure rod (25), the connecting portion (23b) is provided with a positioning hole, the pressure rod (25) is installed in the positioning hole to maintain the position of the pressure block (24) relative to the main body (23), and the pressure sensor (22) is arranged between the pressure block (24) and the pressure rod (25).

10. The hydrogen embrittlement test device with automatic acid removal function according to claim 9, characterized in that: The pressure block (24) is provided with at least one pair of first support rollers protruding outwards toward the corresponding support claws (23c) at the bending angle on one side close to the support claws (23c), and a pair of the support claws (23c) are provided with at least one second support roller protruding outwards toward the pressure block (24) at the bending angle close to the pressure block (24), and the gap between the at least one pair of first support rollers and the support claws (23c) is opposite.

Images