High-temperature corrosion environment deformation testing device

Abstract

The invention discloses a high-temperature corrosion environment deformation testing device which comprises a rack, a kettle cover is arranged on the rack, a supporting assembly is arranged at the bottom of the kettle cover, a tubular sample is installed on the supporting assembly in a sleeving mode, a tubular fragile mandrel is placed in the tubular sample, a pressing assembly penetrating through the kettle cover is arranged in the rack, and the pressing assembly penetrates through the kettle cover. The bottom end of the pressing assembly is inserted into the tubular fragile mandrel and enables the tubular fragile mandrel to be broken. The device has the beneficial effects that the supporting assembly, the first steam channel, the pressing assembly, the second steam channel and the tubular fragile mandrel are adopted, so that the testing accuracy is improved when a material is subjected to a deformation test; by adopting the positioning ring groove, when the tubular sample is pressed by the elastic pressure plate, the tubular sample is positioned by the positioning ring groove, so that the tubular sample is more stable, and further, the iodine vapor is not easy to leak.

Description

Technical Field

[0001] This invention belongs to the field of metal testing, specifically relating to a deformation testing device for high-temperature corrosion environments. Background Technology

[0002] In modern nuclear reactors, zirconium alloys are widely used as structural components and fuel cladding. Reactor fuel pellets are UO2, which produces fission gas I2 during nuclear reactions. Iodine vapor is corrosive and acts on the inner surface of the cladding. During reactor operation, the interaction between the zirconium alloy fuel cladding and the pellets is one form of fuel cladding failure. The failure mechanism is iodine vapor-induced stress corrosion cracking; therefore, it is necessary to conduct circumferential stress performance tests on the material under high-temperature iodine vapor conditions.

[0003] Currently, Chinese patent publication number "CN203299069U" discloses a stress corrosion cracking testing device, including a sealed box, a gas nozzle, and a high-temperature atmospheric furnace. The sealed box has hole-shaft sealing structures at both ends for the tensile rods of the testing machine to pass through. The high-temperature atmospheric furnace surrounds the sides of the sealed box, and the gas nozzles are located at both ends. In use, steam is introduced into the sealed box through the gas nozzles, and the high-temperature atmospheric furnace heats the sealed box, thus simulating high-temperature, steam-induced working conditions. The lower and upper tensile rods of the testing machine pass through the hole-shaft sealing structures at both ends of the sealed box and enter the interior. The sample is installed between the lower and upper tensile rods, which can stretch or compress the sample, thereby conducting a stress cracking test.

[0004] Since iodine vapor only acts on the inner surface of the casing, the entire sample is tested in a high-temperature vapor environment during the above test. The test environment is different from the actual use environment of the material, which will lead to a decrease in test accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide a high-temperature corrosion environment deformation testing device to improve the accuracy of stress corrosion cracking testing of materials.

[0006] To achieve the above objectives, the present invention provides a high-temperature corrosion environment deformation testing device, comprising a frame, a vessel lid mounted on the frame, a support assembly at the bottom of the vessel lid, a tubular sample fitted onto the support assembly, a tubular fragile mandrel placed inside the tubular sample, a pressing assembly penetrating the vessel lid within the frame, the bottom end of the pressing assembly inserting into the tubular fragile mandrel and causing it to break, the broken tubular fragile mandrel compressing the inner wall of the tubular sample and generating stress within the tubular sample; a first vapor channel is formed within the support assembly, one end of the first vapor channel being connected to an inlet pipe, and the other end being connected to the bottom end of the inner cavity of the tubular sample; a second vapor channel is formed within the pressing assembly, one end of the second vapor channel being connected to an outlet pipe, and the other end being connected to the top end of the inner cavity of the tubular sample; a test vessel is mounted on the frame below the vessel lid, the test vessel being covered by the support assembly and sealed against the vessel lid.

[0007] In one or more embodiments of the present invention, the support assembly includes a reaction column, a beam block, and a positioning base. The reaction column is fixedly disposed on the bottom wall of the vessel lid, the beam block is fixedly disposed at the bottom end of the reaction column, and the positioning base is disposed inside the beam block. The top end of the positioning base forms a positioning column, and the tubular sample is sleeved on the positioning column, with the bottom end wall of the tubular sample abutting against and fitting the top wall of the positioning base. A first airflow channel is provided inside the positioning base and the positioning column. A plurality of air holes communicating with the first airflow channel are provided on the peripheral side wall of the positioning column. The end of the first airflow channel away from the air holes is connected to an air inlet pipe, and the first airflow channel and the air holes form a first steam channel.

[0008] In one or more embodiments of the present invention, the pressing assembly includes a driving member, a pressure rod, a connecting block, an elastic pressure plate, and a ejector pin. The driving member is mounted on a frame, the pressure rod is mounted on the driving end of the driving member and penetrates the vessel lid, the connecting block is mounted on the bottom end of the pressure rod, the ejector pin is mounted on the bottom end of the pressure rod, the elastic pressure plate is mounted on the connecting block and sleeved on the outside of the ejector pin, the bottom end of the ejector pin slides through the elastic pressure plate, the bottom wall of the elastic pressure plate moves to abut against and fit the top end wall of the tubular sample, and the ejector pin moves to insert into the tubular fragile mandrel; a second airflow channel is provided at the bottom end of the connecting block, the two ends of the second airflow channel are respectively connected to the air outlet pipe and the inner cavity of the elastic pressure plate, and the second airflow channel and the inner cavity of the elastic pressure plate form a second vapor channel.

[0009] In one or more embodiments of the present invention, a positioning ring groove is provided in the middle of the bottom wall of the elastic pressure plate, and the top end of the tubular sample is inserted into the positioning ring groove.

[0010] In one or more embodiments of the present invention, a plurality of first guide posts are provided on the outer side of the elastic pressure plate, the top of the first guide post slides through the connecting block, a first elastic element is provided on the first guide post, and the two ends of the first elastic element abut against the elastic pressure plate and the connecting block respectively.

[0011] In one or more embodiments of the present invention, a sealing ring is provided on the end wall of the test vessel near the vessel lid, and a vent pipe and an exhaust pipe are provided inside the vessel lid, with the ends of the vent pipe and the exhaust pipe extending into the test vessel.

[0012] In one or more embodiments of the present invention, a lifting component is provided on the frame, a lifting plate is provided at the lifting end of the lifting component, an elastic component is provided on the lifting plate, and the elastic component is provided at the bottom of the test vessel.

[0013] In one or more embodiments of the present invention, the elastic component includes a first disc, a second disc, a third disc, a second guide rod, and a second elastic element. The first disc is fixedly mounted on a lifting plate, the second disc is fixedly mounted at the bottom of the test vessel, the second guide rod is fixedly mounted on the second disc and slides through the first disc, the second elastic element is sleeved on the second guide rod, and the two ends of the second elastic element abut against the first disc and the second disc respectively. The third disc is located on the side of the first disc away from the second disc, and the third disc is fixedly connected to the bottom end of the second guide post.

[0014] In one or more embodiments of the present invention, the frame is provided with a measuring instrument for measuring the circumferential deformation of the tubular specimen.

[0015] In one or more embodiments of the present invention, observation tubes are provided through both radially opposite sides of the outer wall of the test vessel, the observation tubes are at the same height as the tubular sample, and a transparent sealing plate is provided inside the observation tubes. When the test vessel abuts against the vessel lid, the measuring instrument and the observation tubes are at the same height.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By employing a support assembly, a first vapor channel, a pressing assembly, a second vapor channel, and a tubular fragile mandrel, iodine vapor acts only on the inner wall of the sample during material deformation testing. Furthermore, the tubular fragile mandrel compresses the tubular sample from within, making the testing environment more closely match the usage environment and thus improving testing accuracy. The use of a positioning ring groove positions the tubular sample when the elastic pressure plate presses it down, making the sample more stable and further reducing the likelihood of iodine vapor leakage. Attached Figure Description

[0018] Figure 1This is a partial structural cross-sectional view of the high-temperature corrosion environment deformation testing device of this application, highlighting the pressing component and the support component;

[0019] Figure 2 This is a schematic diagram of the overall structure of the test vessel of the high-temperature corrosion environment deformation testing device in the application, in the rising and closed state.

[0020] Figure 3 This is a schematic diagram of the overall structure of the test vessel of the high-temperature corrosion environment deformation testing device of this application in the lowered and opened state;

[0021] Figure 4 This is a partial structural cross-sectional view of the high-temperature corrosion environment deformation testing device of this application, used to highlight the internal structure of the test vessel;

[0022] Figure 5 This application Figure 3 Enlarged solid image at point A;

[0023] Figure 6 This application Figure 2 Enlarged solid image at point B in the middle.

[0024] Explanation of key figure labels:

[0025] 1. Frame; 11. Upper frame plate; 12. Column; 13. Lower frame plate; 2. Reactor lid; 3. Test reactor; 4. Support assembly; 41. Reaction column; 42. Beam block; 43. Positioning base; 431. Positioning column; 5. Pressing assembly; 51. Drive component; 52. Pressure rod; 53. Connecting block; 54. Elastic pressure plate; 55. Ejector pin; 6. Tubular specimen; 7. Tubular fragile mandrel; 8. First vapor channel; 81. First airflow channel; 82. Vent; 9. Second vapor channel; 91. Second airflow channel; 10. Inlet pipe ; 14. Vent pipe; 15. Measuring instrument; 16. Positioning ring groove; 17. First guide post; 18. First elastic element; 19. Sealing ring; 20. Vent pipe; 21. Exhaust pipe; 22. Lifting component; 23. Lifting plate; 24. Elastic component; 241. First disc; 242. Second disc; 243. Third disc; 244. Second guide rod; 245. Second elastic element; 25. Observation tube; 26. Lens sealing plate; 27. Heating rod; 28. Protective sleeve; 29. ​​Mounting cavity; 30. Base plate; 31. Support rod. Detailed Implementation

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0027] Reference Figure 3A high-temperature corrosion environment deformation testing device includes a frame 1, which consists of an upper frame plate 11, a lower frame plate 13 and four columns 12. The upper frame plate 11 and the lower frame plate 13 are respectively fixedly installed at the upper and lower ends of the four columns 12, and the lower frame plate 13 is placed on the ground.

[0028] Reference Figure 2 and 5 A vessel lid 2 is fixedly installed horizontally at the center of the four columns 12. A support assembly 4 is installed at the bottom of the vessel lid 2. A tubular sample 6 is placed on the support assembly 4, and a tubular fragile mandrel 7 is placed inside the tubular sample 6. A pressing assembly 5 penetrating the vessel lid 2 is installed on the bottom wall of the upper plate 11. The bottom end of the pressing assembly 5 moves and inserts into the tubular fragile mandrel 7 and breaks it. The broken tubular fragile mandrel 7 compresses the inner wall of the tubular sample 6 and generates stress inside the tubular sample 6, thereby forming a circumferential stress test environment.

[0029] Reference Figure 2 and 3 After the pressing component 5 moves and inserts into the tubular fragile mandrel 7, the pressing component 5 and the support component 4 abut and seal the upper and lower ends of the tubular sample 6. An air inlet pipe 10 is installed on the support component 4, and a first steam channel 8 is opened inside the support component 4. The two ends of the first steam channel 8 are respectively connected to the air inlet pipe 10 and the bottom of the inner cavity of the tubular sample 6, and the end of the air inlet pipe 10 away from the support component 4 is sealed and exits through the kettle cover 2. An air outlet pipe 14 is installed on the pressing component 5, and a second steam channel 9 is opened inside the pressing component 5. The two ends of the second steam channel 9 are respectively connected to the air outlet pipe 14 and the top of the inner cavity of the tubular sample 6, and the end of the air outlet pipe 14 away from the pressing component 5 is sealed and exits through the kettle cover 2.

[0030] Iodine vapor first enters the first vapor channel 8 of the support assembly 4 through the inlet pipe 10, then enters the tubular sample 6 through the first vapor channel 8, then enters the second vapor channel 9 from inside the tubular sample 6, and finally exits through the outlet pipe 14. In this way, a corrosion testing environment is provided, and the iodine vapor only acts on the inner wall of the sample.

[0031] Reference Figure 2 Lifting components 22 are fixedly installed on two opposing columns 12 on both sides of the frame 1 in the horizontal direction. A lifting plate 23 is fixedly installed on the lifting end of the lifting component 22, and an elastic component 24 is installed on the lifting plate 23. The test vessel 3 is installed on the elastic component 24. In this application, the lifting component 22 can be an electric push rod. The lifting component 22 drives the test vessel 3 to rise and fall through the lifting plate 23 and the elastic component 24, thereby automatically opening and closing the test vessel 3.

[0032] Reference Figure 4Six heating rods 27 are fixedly installed inside the test vessel 3. When the test vessel 3 rises to touch the lid 2, the six heating rods 27 are located around the tubular sample 6, thus providing a high-temperature testing environment. Since the test material is radioactive, the test process needs to be carried out in a shielded hot chamber. A robotic arm places the tubular sample 6 and the tubular fragile mandrel 7, and the test vessel 3 then automatically rises and falls to facilitate the test.

[0033] A protective sleeve 28 is fixedly installed inside the test vessel 3. A mounting cavity 29 with a bottom opening is formed at the bottom end of the test vessel 3. A heating rod 27 is inserted into the protective sleeve 28 through the mounting cavity 29. A base plate 30 is bolted to the bottom opening end of the test vessel 3 located within the mounting cavity 29, and the bottom end of the heating rod 27 is fixedly installed to the base plate 30. The protective sleeve 28 protects the heating rod 27, making it less susceptible to corrosion.

[0034] In summary, the deformation testing device provides a testing environment with high temperature, internal wall corrosion, and circumferential stress, making the testing environment more closely match the usage environment and thus improving the accuracy of the test.

[0035] Reference Figure 1 and 4 Measuring instruments 15 are fixedly mounted on two supports on both radial sides of the test vessel 3. Observation tubes 25, with the same height as the tubular sample 6, are welded and fixed horizontally to opposite radial sides of the test vessel 3. A transparent sealing plate is installed inside the observation tubes 25 to seal their inner cavity, and the height of the observation tubes 25 is the same as that of the measuring instruments 15. During testing, the measuring instruments 15 can measure the circumferential deformation of the tubular sample 6 through the observation tubes 25, thereby obtaining the test results.

[0036] Reference Figure 3 The inner seal of the vessel lid 2 is fitted with a vent pipe 20 and an exhaust pipe 21. The bottom ends of both the vent pipe 20 and the exhaust pipe 21 extend into the inner cavity of the test vessel 3, with the bottom end of the vent pipe 20 located at the bottom of the inner cavity of the test vessel 3 and the bottom end of the exhaust pipe 21 located at the top of the inner cavity of the test vessel 3. The end of the vent pipe 20 away from the test vessel 3 is connected to a gas supply device, and a sealing joint is installed at the end of the vent pipe 20 away from the test vessel 3.

[0037] Before the test, argon gas is injected into the test vessel 3 through the vent pipe 20, so that the air in the test vessel 3 is discharged from the test vessel 3 through the exhaust pipe 21. After the argon gas is introduced for a certain period of time, the injection of argon gas is stopped and the sealing joint is closed, so that the test vessel 3 is filled with argon gas, thereby reducing the influence of air on the test.

[0038] Reference Figure 4A sealing ring 19 is embedded in the top wall of the test vessel 3. When the test vessel 3 rises and comes into contact with the vessel cover 2, the sealing ring 19 seals the connection between the test vessel 3 and the vessel cover 2, so that the argon gas filled into the test vessel 3 is not easy to leak.

[0039] Reference Figure 2 and 6 Specifically, the elastic component 24 includes a first disc 241, a second disc 242, a third disc 243, four second guide rods 244, and two elastic elements 245. The first disc 241 is fixedly mounted on the lifting plate 23 by bolts. The second disc 242 is located directly above the first disc 241 and is fixedly connected to the bottom of the test vessel 3 via a support rod 31. The four second guide rods 244 slide vertically through the first disc 241. The third disc 243 is located below the first disc 241 and is fixedly connected to the bottom of the four second guide rods 244. The four second elastic elements 245 are sleeved on the four second guide rods 244, and the two ends of the second elastic elements 245 abut against the first disc 241 and the second disc 242, respectively. In this application, the second elastic element 245 can be a spring.

[0040] The lifting component 22 moves the first disc 241 via the lifting plate 23. The first disc 241 moves the second disc 242 via the second elastic element 245. The second disc 242 moves the test vessel 3 via the support rod 31. When the test vessel 3 abuts against the vessel lid 2, the first disc 241 continues to move upward and slides on the second guide rod 244, thus guiding the movement of the first disc 241. At this time, the first disc 241 presses against the second elastic element 245, ensuring that the test vessel 3 remains firmly against the vessel lid 2, thereby improving the sealing between the test vessel 3 and the vessel lid 2. Simultaneously, the third disc 243 limits the second guide post, preventing it from slipping out of the first disc 241.

[0041] Reference Figure 3 and 4 Specifically, the support component 4 includes a beam block 42, a positioning base 43, and four reaction columns 41. The four reaction columns 41 are all fixedly installed on the bottom of the vessel cover 2. The beam block 42 is fixedly installed on the bottom end of the four reaction columns 41 by bolts. The positioning base 43 is inserted into the beam block 42, and the positioning column 431 is formed by a vertical protrusion in the middle of the top wall of the positioning base 43.

[0042] The tubular sample 6 is fitted onto the positioning post 431, and the bottom wall of the tubular sample 6 abuts against and fits against the top wall of the positioning base 43.

[0043] The tubular fragile mandrel 7 is placed inside the tubular sample 6, with the bottom wall of the tubular fragile mandrel 7 abutting against the top wall of the positioning column 431. When feeding the material, the robot first grabs the tubular sample 6 and places it on the positioning column 431, then grabs the tubular fragile mandrel 7 and places it inside the tubular sample 6, and finally the test vessel 3 is raised and inflated.

[0044] Reference Figure 2 and 3 The pressing assembly 5 includes a driving component 51, a pressure rod 52, a connecting block 53, an elastic pressure plate 54, and a ejector pin 55. The driving component 51 is fixedly installed on the bottom wall of the upper frame plate 11, and the pressure rod 52 is fixedly installed on the driving end of the driving component 51, and the pressure rod 52 slides through the vessel cover 2. In this application, the driving component 51 can be a hydraulic cylinder, and the driving component 51 drives the pressure rod 52 to move up and down in the vertical direction.

[0045] The connecting block 53 is fixedly installed at the bottom end of the pressure rod 52, the ejector pin 55 is fixedly installed at the bottom end of the connecting block 53, and the elastic pressure plate 54 is sleeved on the outer periphery of the bottom of the connecting block 53 and the top of the ejector pin 55, with the bottom of the ejector pin 55 sliding through the elastic pressure plate 54. In this application, the elastic pressure plate 54 can be a bellows.

[0046] After the material is fed, the drive unit 51 drives the elastic pressure plate 54 and the ejector pin 55 to move downward together through the pressure rod 52 and the connecting block 53. The bottom end of the ejector pin 55 first enters the tubular sample 6, the elastic pressure plate 54 then abuts against the top wall of the tubular sample 6 and is squeezed and contracted, and the bottom end of the ejector pin 55 then inserts into the tubular fragile mandrel 7, which can then break the tubular fragile mandrel 7.

[0047] Reference Figure 5 The positioning base 43 has a first airflow channel 81 extending into the positioning post 431. Multiple air holes 82 are formed on the outer periphery of the positioning post 431. The first airflow channel 81 and the air holes 82 together form a first vapor channel 8. An inlet pipe 10 is fixedly installed at the bottom of the positioning base 43 and communicates with the first airflow channel 81. Iodine vapor in the inlet pipe 10 enters the tubular sample 6 through the first airflow channel 81 and the air holes 82.

[0048] Reference Figure 3 A second airflow channel 91 is provided inside the connecting block 53. The outlet pipe 14 is fixedly installed on the connecting block 53 and communicates with one end of the second airflow channel 91. The other end of the second airflow channel 91 communicates with the inner cavity of the elastic pressure plate 54, and the inner cavity of the elastic pressure plate 54 communicates with the tubular sample 6 through the through hole of the ejector pin 55. The inner cavity of the elastic pressure plate 54 and the second airflow channel 91 form a second vapor channel 9. Iodine vapor in the tubular sample 6 flows into the outlet pipe 14 and out of the test vessel 3 through the inner cavity of the elastic pressure plate 54 and the second airflow channel 91.

[0049] Four first guide posts 17 are fixedly installed on the periphery of the elastic pressure plate 54. The first guide posts 17 are installed vertically and slide through the connecting block 53. First elastic elements 18 are sleeved on the first guide posts 17, and the two ends of the first elastic elements 18 abut against the elastic pressure plate 54 and the connecting block 53, respectively. In this application, the first elastic element 18 can be a spring. A positioning ring groove 16 is formed on the bottom wall of the elastic pressure plate 54 on the outer periphery of the ejector pin 55.

[0050] Reference Figure 5 When the elastic pressure plate 54 abuts against the tubular sample 6, the top end of the tubular sample 6 is inserted into the positioning ring groove 16. The positioning ring groove 16 positions the tubular sample 6, making the elastic pressure plate 54 more stable when pressing down on the positioning ring groove 16. The first elastic element 18 presses the tubular sample 6 onto the positioning base 43 through the elastic pressure plate 54, thereby sealing the upper and lower ends of the tubular sample 6 and making it less likely for iodine vapor to leak.

[0051] The implementation principle of this application embodiment is as follows: When performing deformation testing on the material, the tubular sample 6 is first installed on the positioning column 431, and then the tubular fragile mandrel 7 is placed inside the tubular sample 6. The test vessel 3 rises to abut against the vessel cover 2 and covers the tubular sample 6. The driving component 51 drives the ejector pin 55 to move through the pressure rod 52 and the connecting block 53. The end of the ejector pin 55 extends into the tubular sample 6 and inserts into the tubular fragile mandrel 7. After the tubular fragile mandrel 7 is broken, it squeezes the inner wall of the tubular sample 6, thereby generating stress inside the tubular sample 6. Iodine vapor first enters the first vapor channel 8 from the inlet pipe 10, then flows through the inner cavity of the tubular sample 6 and flows into the second vapor channel 9, and finally exits from the outlet pipe 14. During the test, the measuring instrument 15 measures the circumferential deformation of the tubular sample 6 to obtain the test result. With this design, when performing deformation tests on materials, iodine vapor only acts on the inner wall of the sample, and the tubular fragile mandrel 7 squeezes the tubular sample 6 from inside the tubular sample 6, thereby making the test environment more consistent with the usage environment and thus improving the accuracy of the test.

[0052] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A deformation testing device for high-temperature corrosion environments, characterized in that: The device includes a frame, on which a vessel lid is mounted. A support assembly is located at the bottom of the vessel lid. A tubular sample is fitted onto the support assembly, and a tubular fragile mandrel is placed inside the tubular sample. A pressing assembly penetrating the vessel lid is located inside the frame. The bottom end of the pressing assembly is inserted into the tubular fragile mandrel and causes it to break. After the tubular fragile mandrel breaks, it compresses the inner wall of the tubular sample and generates stress within the tubular sample. A first vapor channel is formed within the support assembly, with one end of the first vapor channel connected to an air inlet pipe and the other end connected to the bottom of the inner cavity of the tubular sample. A second vapor channel is formed within the pressing assembly, with one end of the second vapor channel connected to an air outlet pipe and the other end connected to the top of the inner cavity of the tubular sample. The frame is located below the vessel lid and the test vessel is lifted and lowered. The test vessel is covered by a support assembly and sealed against the vessel lid.

2. The high-temperature corrosion environment deformation testing device according to claim 1, characterized in that: The support assembly includes a reaction column, a beam block, and a positioning base. The reaction column is fixedly mounted on the bottom wall of the vessel lid, the beam block is fixedly mounted on the bottom end of the reaction column, and the positioning base is located inside the beam block. The top of the positioning base forms a positioning column, and the tubular sample is sleeved on the positioning column, with the bottom end wall of the tubular sample abutting against and fitting against the top wall of the positioning base. A first airflow channel is formed inside the positioning base and the positioning column. Multiple air holes communicating with the first airflow channel are formed on the peripheral side wall of the positioning column. The end of the first airflow channel away from the air holes is connected to an air inlet pipe, and the first airflow channel and the air holes form a first steam channel.

3. The high-temperature corrosion environment deformation testing device according to claim 1, characterized in that: The pressing assembly includes a driving component, a pressure rod, a connecting block, an elastic pressure plate, and a ejector pin. The driving component is mounted on the frame. The pressure rod is mounted on the driving end of the driving component and penetrates the vessel lid. The connecting block is mounted on the bottom end of the pressure rod. The ejector pin is mounted on the bottom end of the pressure rod. The elastic pressure plate is mounted on the connecting block and sleeved on the outside of the ejector pin. The bottom end of the ejector pin slides through the elastic pressure plate. The bottom wall of the elastic pressure plate moves to abut against and fit the top end wall of the tubular sample, and the ejector pin moves to insert into the tubular fragile mandrel. The bottom end of the connecting block is provided with a second airflow channel. The two ends of the second airflow channel are respectively connected to the air outlet pipe and the inner cavity of the elastic pressure plate, and the second airflow channel and the inner cavity of the elastic pressure plate form a second steam channel.

4. The high-temperature corrosion environment deformation testing device according to claim 3, characterized in that: The bottom wall of the elastic pressure plate has a positioning ring groove in the middle, and the top end of the tubular sample is inserted into the positioning ring groove.

5. The high-temperature corrosion environment deformation testing device according to claim 3, characterized in that: The elastic pressure plate is provided with a plurality of first guide posts on its outer side. The top of the first guide post slides through the connecting block. The first guide post is provided with a first elastic element. The two ends of the first elastic element abut against the elastic pressure plate and the connecting block, respectively.

6. The high-temperature corrosion environment deformation testing device according to claim 1, characterized in that: A sealing ring is provided on the end wall of the test vessel near the lid. A vent pipe and an exhaust pipe are provided inside the lid, and the ends of the vent pipe and the exhaust pipe extend into the test vessel.

7. The high-temperature corrosion environment deformation testing device according to claim 1, characterized in that: The frame is equipped with a lifting component, the lifting end of the lifting component is equipped with a lifting plate, the lifting plate is equipped with an elastic component, and the elastic component is located at the bottom of the test vessel.

8. The high-temperature corrosion environment deformation testing device according to claim 7, characterized in that: The elastic component includes a first disc, a second disc, a third disc, a second guide rod, and a second elastic element. The first disc is fixedly mounted on the lifting plate, the second disc is fixedly mounted at the bottom of the test vessel, the second guide rod is fixedly mounted on the second disc and slides through the first disc, the second elastic element is sleeved on the second guide rod, and the two ends of the second elastic element abut against the first disc and the second disc respectively. The third disc is located on the side of the first disc away from the second disc, and the third disc is fixedly connected to the bottom end of the second guide post.

9. The high-temperature corrosion environment deformation testing device according to claim 1, characterized in that: The frame is equipped with a measuring instrument for measuring the circumferential deformation of tubular specimens.

10. A high-temperature corrosion environment deformation testing device according to claim 9, characterized in that, Observation tubes are installed on both radially opposite sides of the outer wall of the test vessel. The observation tubes are at the same height as the tubular sample. A transparent sealing plate is installed inside the observation tubes. When the test vessel is in contact with the lid, the measuring instrument and the observation tubes are at the same height.

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