A test apparatus suitable for stress corrosion

Abstract

The utility model relates to test sample technical field, concretely relates to a kind of test equipment suitable for stress corrosion, ensure the sealing property and security, kettle body and kettle cover sealing place adopt cooling jacket to cool, avoid sealing ring at sealing place should high temperature and sealing failure, improve the reliability of sealing. Glove box is set on the upper end of equipment, and inert gas environment without oxygen and water in glove box. Pull rod, experimental kettle flange and each connecting joint, the interface that possible leak is all set in glove box interior, in independent inert gas space, even if slight leakage occurs, also cannot cause the occurrence of safety accident. In addition, hydrogen probe is set in glove box, for monitoring whether hydrogen leaks, and alarm protection can be issued in the case of leakage.

Description

Technical Field

[0001] This utility model relates to the field of test specimen technology, and more specifically, to a test device suitable for stress corrosion. Background Technology

[0002] With ever-increasing energy demand, traditional fossil fuels such as coal, oil, and natural gas are facing depletion. Hydrogen energy, on the other hand, is abundant, produces only water as a combustion byproduct, is clean and pollution-free, and boasts high energy density. Hydrogen-induced stress corrosion is a corrosion phenomenon that occurs in metals under the combined action of hydrogen and tensile stress. It is highly hazardous; the higher the concentration of hydrogen in the environment, the more hydrogen the metal absorbs, and the more susceptible it is to stress corrosion. Given increasingly stringent environmental protection requirements, developing green and environmentally friendly hydrogen-induced stress corrosion protection technologies will become a development trend.

[0003] Existing technologies have some shortcomings in terms of sealing and safety protection. The test vessel applies a certain tensile stress to the sample through the tie rod. Hydrogen leakage may occur at the flange connection, valve interface and other sealing parts. Due to the high permeability of hydrogen, leakage is more likely to occur at the tie rod (telescopic) dynamic sealing structure, which may lead to safety accidents. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a high-temperature and high-pressure hydrogen environment stress corrosion testing device for testing the stress corrosion performance of samples under high-temperature and high-pressure hydrogen environment, and to solve the problem of safe use of hydrogen during the test.

[0005] To achieve the above objectives, this utility model provides a testing device suitable for stress corrosion, comprising:

[0006] The main body is a frame structure, and a platform plate is provided in the middle of the main body, which divides the main body into a first main body and a second main body from top to bottom;

[0007] An experimental vessel assembly is disposed inside the second main body, and a sample is disposed inside the experimental vessel assembly;

[0008] A stress loading module includes a stress loading unit, which is fixedly connected to the lid of the experimental vessel via a loading rod. The stress loading unit slides vertically under the action of a lifting device. The loading rod passes through the lid of the experimental vessel and enters the interior of the experimental vessel to connect with the sample.

[0009] Preferably, the first main body includes a glove box, which is a sealed structure and filled with inert gas, and the stress loading module is disposed inside the glove box.

[0010] Preferably, the glove box is provided with tempered glass windows on both the front and rear sides, and the front side of the glove box is provided with at least one glove ring hole, in which a rubber glove is provided. The rubber glove is used by the user to operate the glove box while ensuring that the glove box is sealed.

[0011] Preferably, the experimental vessel assembly includes a vessel body, the vessel body including an air inlet and an air outlet, the air inlet being located at the top of the vessel body, the air outlet being located at a horizontally relative position to the air inlet, and the air outlet extending to the bottom of the vessel body through a pipeline and having an air outlet port.

[0012] Preferably, the outer side of the vessel body is provided with heat dissipation fins and a water cooling jacket, the heat dissipation fins are disposed on the outer periphery of the upper part of the vessel body, and the water cooling jacket is disposed on the top of the heat dissipation fins;

[0013] It also includes a heat insulation sheet, which is disposed between the vessel body and the platform plate.

[0014] Preferably, a heating furnace is fitted around the outside of the vessel body, and a thermocouple is also provided inside the vessel body. The heating furnace and the thermocouple are used to heat the vessel body.

[0015] Preferably, the stress loading unit is slidably fixed to the surface of the guide column and slides up and down on the surface of the guide column. The guide column is equipped with a linear bearing, which is driven by the lifting device.

[0016] Preferably, the bottom of the loading rod is connected to the sample clamp, the sample is placed inside the sample clamp, and the sample clamp is placed at the bottom of the experimental vessel lid.

[0017] Preferably, the stress loading module further includes a pressure balancing device, which is located on the upper part of the lid of the experimental vessel and is used to counteract the thrust of the loading rod by the pressure of the gas inside the vessel.

[0018] Preferably, the vessel body is further provided with an internal reaction frame, which is used to bear the reaction force during the tensile test, and the internal reaction frame is connected to the sample clamp.

[0019] Compared with existing technologies, the technical solution proposed in this application has the following beneficial effects: It ensures sealing and safety. A cooling jacket is used at the sealing point between the vessel body and the lid to prevent the sealing ring from failing due to high temperatures, thus improving the reliability of the seal. A glove box is installed at the top of the equipment, containing an oxygen-free and water-free inert gas environment. The tie rod, experimental vessel flange, and all connecting joints, as well as any interfaces where leakage may occur, are all located inside the glove box in an independent inert gas space. Even minor leaks will not cause safety accidents. Furthermore, a hydrogen probe is installed inside the glove box to monitor for hydrogen leaks, triggering an alarm in case of a leak. Additionally, this equipment can increase the working pressure of hydrogen to over ten MPa and the temperature to over 650℃, depending on the materials selected for the experimental vessel. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is an overall structural diagram of the testing equipment of this utility model;

[0022] Figure 2 This is a partial enlarged view of the vessel body of this utility model;

[0023] Figure 3 This is a diagram of the improved internal structure of this utility model;

[0024] In the diagram: 1. Inspection cover; 2. Upper glove box; 3. Large transition chamber; 4. Small transition chamber; 5. Platform plate; 6. Equipment frame; 7. Tempered glass window; 8. Glove ring hole; 9. Experimental reactor assembly; 10. Stress loading unit; 11. Guide column; 12. Lifting device; 13. Sample clamp; 14. Linear bearing.

[0025] 901 Air inlet, 902 Water cooling jacket, 903 Thermocouple, 904 Sample, 905 Reactor body, 906 Pressure balancing device, 907 Reactor cover, 908 Tie rod, 5 Platform plate, 908 Tie rod, 909 Air outlet, 910 Heat sink, 911 Heat insulation sheet, 912 Heating furnace, 913 Reactor internal reaction frame, 914 Air outlet. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described and discussed below with reference to the accompanying drawings. Obviously, what is described here is only a part of the examples of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0027] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] See Figures 1 to 3 This embodiment provides a testing device suitable for stress corrosion, comprising:

[0030] The main body is a frame structure with a platform plate in the middle, dividing it into a first main body and a second main body from top to bottom. An experimental vessel assembly is located inside the second main body and contains a sample. A stress loading module includes a stress loading unit fixedly connected to the vessel lid via a loading rod. The stress loading unit slides vertically under the action of a lifting device. The loading rod passes through the vessel lid and extends into the vessel to connect with the sample. The first main body includes a glove box, which is a sealed structure filled with inert gas. The stress loading module is located inside the glove box.

[0031] The glove box is provided with tempered glass windows on both the front and rear sides, and the front side of the glove box is provided with at least one glove ring hole, in which a rubber glove is placed. The rubber glove is used by the user to operate the glove box while ensuring that the glove box is sealed.

[0032] The experimental vessel assembly includes a vessel body, which includes an air inlet and an air outlet. The air inlet is located at the top of the vessel body, and the air outlet is located at a horizontally opposite position to the air inlet. The air outlet extends to the bottom of the vessel body through a pipeline and is provided with an air outlet.

[0033] The vessel body is equipped with heat dissipation fins and a water-cooling jacket on its outer side. The heat dissipation fins are located on the outer periphery of the upper part of the vessel body, and the water-cooling jacket is located on top of the heat dissipation fins. It also includes a heat insulation sheet, which is disposed between the vessel body and the platform plate. A heating furnace is fitted around the outside of the vessel body, and a thermocouple is also installed inside the vessel body. The heating furnace and the thermocouple are used to heat the vessel body.

[0034] The stress loading unit is slidably fixed to the surface of the guide column and slides up and down on the guide column surface. A linear bearing is provided on the guide column, and the bearing is driven by the lifting device. The bottom of the loading rod is connected to the sample clamp, and the sample is placed inside the sample clamp, which is located at the bottom of the experimental vessel lid. The stress loading module also includes a pressure balancing device, which is located on the upper part of the experimental vessel lid. The pressure balancing device is used to counteract the thrust of the loading rod by the pressure of the gas inside the vessel. An internal reaction frame is also provided inside the vessel, which is used to bear the reaction force during the tensile test. The internal reaction frame is connected to the sample clamp.

[0035] Depend on Figure 1 As can be seen, the glove box is installed on platform 5, and all possible leak points and seals are located inside the glove box. When hydrogen leaks, the hydrogen leaks into the glove box. The glove box has tempered glass windows at both the front and back for easy observation of the interior. A rubber glove is installed inside the glove ring hole, allowing hands to be inserted into the box for necessary operations, such as sample installation, without affecting the atmosphere.

[0036] Depend on Figure 2 It can be seen that the air inlet and outlet of the test vessel are located on the flange side of the vessel body 905, the air inlet 901 is at the top, and the air outlet 909 extends into the bottom of the vessel through a pipeline, so that the gas can flow through the entire vessel body.

[0037] A pressure balancing device (906) is installed on the loading rod 908 to balance the thrust on the 908 rod caused by the internal pressure of the vessel. A heat sink (910) and a water-cooling jacket (902) are installed on the upper outer side of the vessel body (905), which can further reduce the temperature of the vessel body (905) and the sealing area of ​​the vessel lid (907). A thermocouple (903) extends from the vessel lid (907) into the vessel, with two temperature measuring points (upper and lower), corresponding to the two heating zones of the heating furnace (912), enabling segmented control and making the temperature inside the vessel more uniform.

[0038] The ball screw nut drives the loading beam to move, and then loads the 904 sample via the 908 tie rod. An O-ring seal is used between the 905 vessel body and the 907 vessel lid. The 907 vessel lid and 905 vessel body are locked together by eight high-temperature resistant studs around the perimeter, and a torque wrench is used to apply a constant torque, ensuring a leak-free seal between the 905 vessel body and the 907 vessel lid. The test vessel is mounted on platform 5 of the glove box, with the vessel opening facing upwards. An electric lifting device is installed on the 907 vessel lid, which can be raised or lowered via a remote control. A heat insulation sheet (911) is located in the center of the vessel and platform 5, providing heat insulation protection for the components above the vessel. The 913 reaction frame inside the vessel is used to bear the reaction force during the tensile test. During the tensile test, the lower clamp of the sample is connected to the 913 reaction frame, making the lower clamp a fixed end to bear the reaction force of the sample.

[0039] Depend on Figure 3 It can be seen that the stress loading host mainly consists of a stress loading unit (10), an experimental vessel assembly (9), a guide column (11), a lifting device (12), a clamp (13), and a control system. The stress loading unit (10) and the experimental vessel lid (907) are slidably fixed on the four guide columns (11), allowing for overall upward and downward movement. The loading unit (10) and the experimental vessel lid (907) are fixed as one unit. The loading unit passes through the lid via a loading rod (908), extending into the experimental vessel and connecting to the sample clamp (915). The balancing device (906) is mainly used to counteract the thrust generated by the gas pressure inside the vessel on the pull rod, improve the stability of movement, or assist in precise control. Its core is that the balancing cylinder connects to the inside of the experimental vessel. The medium pressure inside the balancing device (906) is equal to that inside the experimental vessel, making the force generated by the balancing device on the pull rod equal to the thrust generated by the medium pressure inside the vessel, thus achieving a balancing effect.

[0040] The main frame is mounted on platform 5 of the atmosphere protection chamber. The upper part of platform 5 includes the 907 test vessel lid, 11 guide columns, 10 stress loading unit, and 12 lifting device; the lower part includes the 905 test vessel body and 912 heating furnace. The 10 stress loading unit and the 907 test vessel lid are mounted on four 11 guide columns via a short optical axis frame. Linear bearings (14) are installed at the mounting positions, allowing the 10 stress loading unit and the 907 test vessel lid to move simultaneously up and down along the optical axis. The 907 test vessel lid has a 906 pressure balancing device on the pull rod to balance the thrust on the pull rod caused by the internal pressure of the vessel body, minimizing the impact of internal pressure fluctuations on the measured data. The 12 lifting device is driven by an electric push rod, guided by the optical axis and linear bearings, to lift the loading unit and the vessel lid. The 904 sample can be fixed using the 13 sample clamp.

[0041] It should be noted that the large and small transition chambers are used to place tools or deliver samples, and the gas leak probe is positioned approximately 1 meter above the top of the vessel lid.

[0042] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, nor to combinations thereof. Those skilled in the art can make various changes, modifications, or combinations within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A testing device suitable for stress corrosion, characterized in that, include The main body is a frame structure, and a platform plate is provided in the middle of the main body, which divides the main body into a first main body and a second main body from top to bottom; An experimental vessel assembly is disposed inside the second main body, and a sample is disposed inside the experimental vessel assembly; A stress loading module includes a stress loading unit, which is fixedly connected to the lid of the experimental vessel via a loading rod. The stress loading unit slides vertically under the action of a lifting device. The loading rod passes through the lid of the experimental vessel and enters the interior of the experimental vessel to connect with the sample.

2. The testing equipment for stress corrosion according to claim 1, characterized in that, The first main body includes a glove box, which is a sealed structure and filled with inert gas. The stress loading module is disposed inside the glove box.

3. The testing equipment for stress corrosion according to claim 2, characterized in that, The glove box is provided with tempered glass windows on both the front and rear sides, and the front side of the glove box is provided with at least one glove ring hole, in which a rubber glove is placed. The rubber glove is used by the user to operate the glove box while ensuring that the glove box is sealed.

4. The testing equipment for stress corrosion according to claim 3, characterized in that, The experimental vessel assembly includes a vessel body, which includes an air inlet and an air outlet. The air inlet is located at the top of the vessel body, and the air outlet is located at a horizontally opposite position to the air inlet. The air outlet extends to the bottom of the vessel body through a pipeline and is provided with an air outlet.

5. A testing device suitable for stress corrosion according to claim 4, characterized in that, The outer side of the vessel body is provided with heat dissipation fins and a water cooling jacket. The heat dissipation fins are located on the outer periphery of the upper part of the vessel body, and the water cooling jacket is located on top of the heat dissipation fins. It also includes a heat insulation sheet, which is disposed between the vessel body and the platform plate.

6. The testing equipment for stress corrosion according to claim 5, characterized in that, A heating furnace is fitted on the outside of the vessel body, and a thermocouple is installed inside the vessel body. The heating furnace and the thermocouple are used to heat the vessel body.

7. A testing device suitable for stress corrosion according to claim 6, characterized in that, The stress loading unit is slidably fixed to the surface of the guide column and slides up and down on the surface of the guide column. The guide column is equipped with a linear bearing, which is driven by the lifting device.

8. A testing device suitable for stress corrosion according to claim 7, characterized in that, The bottom of the loading rod is connected to the sample clamp, the sample is placed inside the sample clamp, and the sample clamp is located at the bottom of the experimental vessel lid.

9. A testing device suitable for stress corrosion according to claim 8, characterized in that, The stress loading module also includes a pressure balancing device, which is located on the upper part of the lid of the experimental vessel. The pressure balancing device is used to counteract the thrust of the loading rod by the pressure of the gas inside the vessel.

10. A testing device suitable for stress corrosion according to claim 9, characterized in that, The vessel body is also equipped with an internal reaction frame, which is used to bear the reaction force during the tensile test. The internal reaction frame is connected to the sample clamp.

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