A high temperature water stress corrosion test device for micro specimens of in-service pressure equipment

Abstract

The present invention discloses a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment, and relates to the technical field of metal detection equipment. The present invention comprises a pressure tank, one side of the pressure tank is connected to a pressure pump, the other side of the pressure tank is provided with a water tank, the top of the water tank is connected to a water pump, the bottom of the pressure tank is fixedly connected to a base, and heaters are installed on both sides of the top of the base. Through the setting of the moving component, the present invention can drive the stainless steel plate sample to move into the pressure tank through the driving action of the first hydraulic rod after the stainless steel plate sample is fixed on the top of the storage plate, so as to realize the function of automatic taking and placing. At the same time, after the stainless steel plate sample is subjected to the high-temperature and high-pressure test, the stainless steel plate sample can be driven to contact the shielding plate again through the first hydraulic rod, and the pressurization is continuously applied to perform a bending test on the stainless steel plate sample, so as to facilitate the experimenter to observe the internal corrosion influence of the stainless steel plate sample and increase the comparative data of the experiment.

Description

Technical Field

[0001] The invention belongs to the technical field of metal detection equipment, and in particular relates to a high-temperature water stress corrosion test device for micro-samples of in-service pressure-bearing equipment. Background Art

[0002] Under certain stress, metal materials are very susceptible to stress corrosion damage in a corrosive environment. Especially in the complex and harsh service environment of nuclear power plants, components face serious threats of stress corrosion failure. At the same time, long-term service of pressure-bearing equipment in service under extreme environments may cause material aging or degradation, resulting in changes in material service performance and increasing the possibility of component failure. In order to ensure the service safety of nuclear power structural materials and understand the service status of components, it is necessary to accurately evaluate the stress corrosion performance of component materials at different service stages.

[0003] In the prior art, a Chinese patent with the publication number of "CN114166651A" discloses a device and method for high-temperature water stress corrosion testing of micro-specimens of in-service pressure-bearing equipment. The device can complete the high-temperature water stress corrosion testing of components by using circular sheet-shaped micro-specimens, achieving the purpose of micro-damage sampling; and because of the external mechanical loading system, when performing stress corrosion evaluation in a high-temperature water environment, micro-damage sampling can be performed while accurately determining the mechanical parameters of the material, and the stress corrosion fracture performance caused by the combined action of mechanics and corrosion can be evaluated for materials serving in high-temperature and high-pressure water environments and extreme environments, solving the problem that although the current experimental methods can effectively evaluate the stress corrosion performance of materials, relatively large test materials are usually required. For in-service pressure pipes, these test materials cannot be extracted from the equipment in use unless there is a reliable means of repair after sampling. Although the sample size is small in some tests such as two-point bending, U-shaped bending and C-shaped ring tests, effective and reliable mechanical information cannot be obtained at the same time during the test, and the sample size is still relatively large, which cannot meet the requirements of non-destructive or micro-damage sampling tests.

[0004] However, the above device still has the following problems during implementation:

[0005] After the sampling fixture fixes the stainless steel, the stress corrosion of the stainless steel is accelerated by applying a high-temperature and high-pressure water environment to the stainless steel, thereby judging the corrosion impact on the steel. However, after the internal stress of the stainless steel is released, only the crack data on the surface of the stainless steel can be used for reference. The impact of stress on the interior of the stainless steel is difficult to observe, and there is a lack of more detailed comparative data.

[0006] To this end, we provide a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment to solve the above-mentioned problems. Summary of the invention

[0007] The purpose of the present invention is to provide a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment. Through the cooperation of a moving component, a rotating component, a limiting component and a clamping component, the problems of the stainless steel water stress corrosion test device in the prior art lacking a steel bending detection step, being difficult to observe the stress corrosion effects inside the stainless steel, and lacking more detailed comparative data are solved.

[0008] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0009] The present invention is a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment, comprising a pressure tank, one side of the pressure tank is connected to a pressure pump, the other side of the pressure tank is provided with a water tank, the top of the water tank is connected to a water pump, the bottom of the pressure tank is fixedly connected to a base, and heaters are installed on both sides of the top of the base;

[0010] The pressure tank is provided with a moving assembly inside, and the moving assembly includes a first hydraulic rod, the first hydraulic rod is fixed to the rear side of the pressure tank, the output end of the first hydraulic rod penetrates into the pressure tank and is fixedly connected to a support sleeve, the support sleeve is movably connected to a support shaft, the top of the support shaft is fixedly connected to a storage plate, and the position of the test sample is adjusted by the moving assembly;

[0011] A rotating assembly is provided inside the base, and a twist test is performed on the test sample through the rotating assembly;

[0012] A limit assembly is provided on the top of the pressure tank, and the moving position of the test sample is blocked by the limit assembly;

[0013] A clamping assembly is arranged inside the pressure tank, and the test sample is clamped and fixed by the clamping assembly.

[0014] The present invention is further configured such that the rotating assembly includes a guide groove, the guide groove is opened at the top of the base, a rotating block is fixedly connected to the bottom of the support shaft, a driving motor is installed at the bottom of the base, a reducer is installed at the output end of the driving motor, an output shaft is installed at the top of the reducer, a rotating seat is installed at the top of the output shaft, and a card slot is opened at the top of the rotating seat.

[0015] The present invention is further configured such that the rotating block is slidably connected to the inner wall of the guide groove, and the size of the rotating block is the same as the size of the slot.

[0016] The present invention is further configured such that the limiting assembly includes a second hydraulic rod, the second hydraulic rod is fixed to the top of the pressure tank, the output end of the second hydraulic rod passes through the pressure tank and is fixedly connected to a tension sensor, a movable plate is installed at the bottom of the tension sensor, and two groups of shielding plates are respectively fixedly connected to the bottom of the movable plate.

[0017] The present invention is further configured such that the clamping assembly includes a pillar, which is fixed to the top of the movable plate, the top of the pillar passes through the pressure tank and is fixedly connected to a servo motor, the output end of the servo motor passes through the pillar and is fixedly connected to a first bevel gear, the bottom of the first bevel gear is meshed with a second bevel gear, and the axis of the second bevel gear is fixedly connected to a threaded rod.

[0018] The present invention is further configured such that a clamping plate is threadedly connected to the surface of the threaded rod, and the front end and the rear end of the threaded rod are both movably connected to the shielding plate.

[0019] The present invention is further configured such that a sliding block is fixedly connected to the top of the clamping plate, and the sliding block is slidably connected to the bottom of the movable plate.

[0020] The present invention is further configured such that a sealing door is movably connected to the front side of the pressure tank, and a handle is fixedly connected to the front side of the sealing door.

[0021] The present invention is further configured such that a protective shell is provided on the surface of the pillar, and the bottom of the protective shell is fixedly connected to the pressure tank.

[0022] The present invention is further configured such that a limiting plate is fixedly connected to the top of the storage plate, a vertical plate is fixedly connected to one side of the storage plate, a bolt rod is threadedly connected to the inside of the vertical plate, and a fixed plate is movably connected to one side of the bolt rod.

[0023] The present invention has the following beneficial effects:

[0024] 1. Through the setting of the moving component, the present invention can drive the stainless steel plate sample to move into the pressure tank through the driving action of the first hydraulic rod after the stainless steel plate sample is fixed on the top of the storage plate, so as to realize the function of automatic taking and placing. At the same time, after the stainless steel plate sample is subjected to the high temperature and high pressure test, the stainless steel plate sample can be driven by the first hydraulic rod again to contact the baffle plate and continuously pressurize to perform a bending test on the stainless steel plate sample, so as to facilitate the experimenters to observe the internal corrosion influence of the stainless steel plate sample and increase the comparative data of the experiment.

[0025] 2. Through the setting of the rotating component, the present invention can move the subsequent stainless steel plate sample into the pressure tank again after the bending test is completed. When the rotating block is inserted into the slot, the rotating seat can be driven by the driving motor to rotate, and the stainless steel plate sample can be subjected to a twisting test. The metal material can be twisted to a certain angle or shape, which is convenient for detecting different stress surfaces of the stainless steel plate sample and increasing the comparative data of the experiment.

[0026] 3. The present invention can clamp and fix the test sample through the setting of the clamping assembly. When the stainless steel plate sample is subjected to the torsion test and the bending test, the position of the stainless steel plate sample can be limited by moving the baffle plate and the clamping plate up and down, thereby playing a role of blocking and bearing force. At the same time, the subsequent stainless steel plate samples can be clamped by moving the clamping plate left and right. When the second hydraulic rod drives the clamping plate and the baffle plate to move upward, the stainless steel plate sample can be subjected to a tensile test, which is convenient for detecting different stress-bearing surfaces of the stainless steel plate sample and increasing the comparative data of the experiment.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0029] Figure 1 It is a structural stereogram of a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment;

[0030] Figure 2 It is a partial cross-sectional view of a pressure tank in a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment;

[0031] Figure 3 It is a side cross-sectional view of a base in a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment;

[0032] Figure 4 It is an explosion diagram of the surface structure of a storage plate in a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment;

[0033] Figure 5 It is a side cross-sectional view of a moving plate, a shielding plate and a clamping plate in a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment;

[0034] Figure 6 It is a schematic diagram of the contact between a stainless steel plate sample and a shielding plate in a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment;

[0035] Figure 7 Schematic diagram of the rotation and clamping of a stainless steel plate specimen in a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment.

[0036] In the attached figure: 1. pressure tank; 2. booster pump; 3. water tank; 4. water pump; 5. base; 6. heater; 7. first hydraulic rod; 8. support sleeve; 9. support shaft; 10. storage plate; 11. guide groove; 12. rotating block; 13. driving motor; 14. reducer; 15. output shaft; 16. rotating seat; 17. slot; 18. second hydraulic rod; 19. tension sensor; 20. moving plate; 21. shielding plate; 22. pillar; 23. servo motor; 24. first bevel gear; 25. second bevel gear; 26. threaded rod; 27. clamping plate; 28. sealing door; 29. ​​protective shell; 30. limit plate; 31. vertical plate; 32. bolt rod; 33. fixing plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Specific embodiments

[0038] See also Figure 1-7 The present invention is a high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment, comprising a pressure tank 1, one side of the pressure tank 1 is connected to a pressure pump 2, the other side of the pressure tank 1 is provided with a water tank 3, the top of the water tank 3 is connected to a water pump 4, the bottom of the pressure tank 1 is fixedly connected to a base 5, and heaters 6 are installed on both sides of the top of the base 5; a moving component is arranged inside the pressure tank 1, and the moving component comprises a first hydraulic rod 7, the first hydraulic rod 7 is fixed to the rear side of the pressure tank 1, the output end of the first hydraulic rod 7 penetrates into the pressure tank 1 and is fixedly connected to a support sleeve 8, the support sleeve 8 is movably connected to a support shaft 9, and the top of the support shaft 9 is fixedly connected to a storage plate 10, and the position of the test sample is adjusted by the moving component; a rotating component is arranged inside the base 5, and the test sample is subjected to a torsion test by the rotating component; a limiting component is arranged on the top of the pressure tank 1, and the moving position of the test sample is blocked by the limiting component; a clamping component is arranged inside the pressure tank 1, and the test sample is clamped and fixed by the clamping component.

[0039] Specifically: the water outlet of the water pump 4 is connected with the pressure tank 1 through a pipeline, the booster pump 2 can inject air pressure into the pressure tank 1, increase the pressure inside the pressure tank 1, and change the environmental pressure of the stainless steel plate sample. A pressure gauge is connected between the booster pump 2 and the pressure tank 1, and the pressure inside the pressure tank 1 can be detected. The water pump 4 can inject water from the water tank 3 into the pressure tank 1, and the water is heated by the heater 6 to maintain the temperature range of 100°C to 300°C. The stainless steel plate sample is subjected to a corrosion test. After the test, the cross-section of the stainless steel plate sample is observed through a microscope, and corrosion analysis techniques such as SEM, EDS, XRD, etc. are used to analyze the corrosion behavior and corrosion rate of the test sample. According to the corrosion analysis results, the corrosion rate of the test sample is calculated. According to the corrosion analysis results, the corrosion depth of the test sample is calculated. According to the corrosion analysis results, the corrosion morphology of the test sample is analyzed to obtain multiple groups of comparative data to increase the accuracy of the test results. Specific embodiments

[0040] See also Figure 1-7 On the basis of the specific embodiment 1, the rotating assembly includes a guide groove 11, the guide groove 11 is opened at the top of the base 5, the bottom of the support shaft 9 is fixedly connected to a rotating block 12, a driving motor 13 is installed at the bottom of the base 5, a reducer 14 is installed at the output end of the driving motor 13, an output shaft 15 is installed on the top of the reducer 14, a rotating seat 16 is installed on the top of the output shaft 15, a slot 17 is opened on the top of the rotating seat 16, the rotating block 12 is slidably connected to the inner wall of the guide groove 11, the size of the rotating block 12 is the same as the size of the slot 17, the limiting assembly includes a second hydraulic rod 18, the second hydraulic rod 18 is fixed to the pressure At the top of the pressure tank 1, the output end of the second hydraulic rod 18 passes through the pressure tank 1 and is fixedly connected to a tension sensor 19. A movable plate 20 is installed at the bottom of the tension sensor 19. Two sets of shielding plates 21 are fixedly connected to the bottom of the movable plate 20. The clamping assembly includes a pillar 22, which is fixed to the top of the movable plate 20. The top of the pillar 22 passes through the pressure tank 1 and is fixedly connected to a servo motor 23. The output end of the servo motor 23 passes through the pillar 22 and is fixedly connected to a first bevel gear 24. A second bevel gear 25 is meshed at the bottom of the first bevel gear 24, and a threaded rod 26 is fixedly connected to the axis of the second bevel gear 25.

[0041] Specifically: the first hydraulic rod 7 is fixed to the rear side of the pressure tank 1, and is used to drive the support sleeve 8 to move forward and backward. The surface of the support shaft 9 is movably connected to the inner wall of the support sleeve 8 through a bearing. A placement groove is opened on the top of the storage plate 10 to place the stainless steel plate sample. The guide groove 11 is opened on the top of the base 5 to limit the forward and backward movement of the support shaft 9. A reducer 14 is installed between the drive motor 13 and the output shaft 15. The gear reducer 14 can convert high-speed mechanical motion into a lower speed and also increase torque to provide power for the torsion test of the stainless steel plate sample. Specific embodiments

[0042] See also Figure 1-7 On the basis of the specific embodiment 1, a clamping plate 27 is threadedly connected to the surface of the threaded rod 26, the front end and the rear end of the threaded rod 26 are movably connected to the shielding plate 21, a slider is fixedly connected to the top of the clamping plate 27, and the slider is slidably connected to the bottom of the movable plate 20, a sealing door 28 is movably connected to the front side of the pressure tank 1, and a handle is fixedly connected to the front side of the sealing door 28, a protective shell 29 is sleeved on the surface of the pillar 22, and the bottom of the protective shell 29 is fixedly connected to the pressure tank 1, a limiting plate 30 is fixedly connected to the top of the storage plate 10, a vertical plate 31 is fixedly connected to one side of the storage plate 10, a bolt rod 32 is threadedly connected inside the vertical plate 31, and a fixed plate 33 is movably connected to one side of the bolt rod 32.

[0043] Specifically: a tension sensor 19 is fixed between the second hydraulic rod 18 and the movable plate 20. After the stainless steel plate sample is clamped by the clamping plate 27 and the shielding plate 21, the second hydraulic rod 18 can be controlled to move upward, and the tension value of the stainless steel plate sample is detected by the tension sensor 19, and the tension value of the final fracture is detected. The shielding plate 21 located on the front side of the movable plate 20 is used to block the movement of the stainless steel plate sample. The shielding plate 21 located on the rear side of the movable plate 20 can cooperate with the clamping plate 27 to clamp and fix the stainless steel plate sample. The clamping plate 27 is connected to the threaded rod 26 by threads, and the horizontal position of the clamping plate 27 can be adjusted under the drive of the threaded rod 26. The sealing door 28 is used to seal the front side of the pressure tank 1 and facilitate the placement of the test sample. The bolt rod 32 is connected to the vertical plate 31 by threads. After the stainless steel plate sample is inserted into the top of the storage plate 10, the bolt rod 32 can be rotated to drive the fixed plate 33 to clamp and fix the stainless steel plate sample.

[0044] The working principle of the present invention is as follows: the pressure pump 2 can inject air pressure into the pressure tank 1 to increase the pressure inside the pressure tank 1 and change the environmental pressure of the stainless steel plate sample. A pressure gauge is connected between the pressure pump 2 and the pressure tank 1 to detect the pressure inside the pressure tank 1. The water pump 4 can inject water from the water tank 3 into the pressure tank 1, and the water is heated by the heater 6 in a temperature range of 100°C to 300°C. The stainless steel plate sample is subjected to a corrosion test, and after the corrosion test is completed, the stainless steel plate sample can be subjected to a bending test.

[0045] The staff starts the second hydraulic rod 18 through the external controller. The second hydraulic rod 18 cooperates with the moving plate 20 to drive the shielding plate 21 to move downward, so that the shielding plate 21 moves downward and keeps it horizontal with the stainless steel plate sample. Then the first hydraulic rod 7 is started. The first hydraulic rod 7 cooperates with the support sleeve 8 to drive the support shaft 9 to move. The support shaft 9 cooperates with the storage plate 10 to drive the stainless steel plate sample to move backward. When the stainless steel plate sample contacts the shielding plate 21, the first hydraulic rod 7 is continuously controlled to apply tension to the stainless steel plate sample. Figure 6 As shown, the shielding plate 21 is used to prevent the stainless steel plate sample from moving, thereby achieving a bending effect on the stainless steel plate sample, making it convenient for experimenters to observe the internal corrosion effect of the stainless steel plate sample and increase the comparative data of the experiment;

[0046] At the same time, when the subsequent stainless steel plate specimens are subjected to torsion tests, Figure 2 The first hydraulic rod 7 can be started again to cooperate with the support sleeve 8 to drive the support shaft 9 to move, and the support shaft 9 drives the rotating block 12 to be completely inserted into the slot 17, and the support shaft 9 and the rotating seat 16 keep the same axis. Figure 7 As shown, the second hydraulic rod 18 is then started, and the second hydraulic rod 18 cooperates with the moving plate 20 to drive the shielding plate 21 and the clamping plate 27 to move downward, so as to limit the two sides of the stainless steel plate sample, and then the driving motor 13 is started, and the driving motor 13 transmits the driving force to the reducer 14, and the reducer 14 reduces the speed and increases the torque to transmit the output shaft 15, and the output shaft 15 cooperates with the rotating seat 16 to drive the rotating block 12 to rotate, and the rotating block 12 cooperates with the supporting shaft 9 to drive the stainless steel plate sample to rotate, and the stainless steel plate sample is subjected to a torsion test, so as to facilitate the detection of different force-bearing surfaces of the stainless steel plate sample and increase the comparative data of the experiment;

[0047] When the subsequent stainless steel plate specimens were subjected to tensile tests, Figure 2 To the initial position, the first hydraulic rod 7 can be started again to keep the support shaft 9 and the rotating seat 16 at the same axis, and then the second hydraulic rod 18 is started. The second hydraulic rod 18 cooperates with the movable plate 20 to drive the baffle plate 21 and the clamping plate 27 to move downward, and the servo motor 23 is started at the same time. The servo motor 23 drives the first bevel gear 24 to rotate, and the first bevel gear 24 cooperates with the threaded rod 26 to drive the clamping plate 27 to move. The clamping plate 27 cooperates with the baffle plate 21 to clamp the stainless steel plate sample. Then the second hydraulic rod 18 is controlled to move upward to perform a tensile test on the stainless steel plate sample, which is convenient for detecting different stress surfaces of the stainless steel plate sample and increasing the comparative data of the experiment.

[0048] The standard parts used in the present invention can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a control unit. The control circuit of the control unit can be realized by simple programming by technicians in this field, which is common knowledge in this field, so the control method and circuit connection are not explained in detail in the present invention.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can better understand and utilize the present invention.

Claims

1. A high-temperature water stress corrosion test device for micro-specimens of in-service pressure-bearing equipment, comprising a pressure tank (1), characterized in that: One side of the pressure tank (1) is connected to a pressure pump (2), the other side of the pressure tank (1) is provided with a water tank (3), the top of the water tank (3) is connected to a water pump (4), the bottom of the pressure tank (1) is fixedly connected to a base (5), and heaters (6) are installed on both sides of the top of the base (5); A moving assembly is arranged inside the pressure tank (1), and the moving assembly comprises a first hydraulic rod (7). The first hydraulic rod (7) is fixed to the rear side of the pressure tank (1). The output end of the first hydraulic rod (7) penetrates into the pressure tank (1) and is fixedly connected to a support sleeve (8). A support shaft (9) is movably connected inside the support sleeve (8). A storage plate (10) is fixedly connected to the top of the support shaft (9). The position of the test sample is adjusted by the moving assembly. The base (5) is provided with a rotating assembly inside, and a torsion test is performed on the test sample through the rotating assembly; A limit assembly is provided on the top of the pressure tank (1), and the moving position of the test sample is blocked by the limit assembly; The pressure tank (1) is provided with a clamping assembly inside, and the test sample is clamped and fixed by the clamping assembly; The limit assembly comprises a second hydraulic rod (18), the second hydraulic rod (18) is fixed to the top of the pressure tank (1), the output end of the second hydraulic rod (18) passes through the pressure tank (1) and is fixedly connected to a tension sensor (19), a movable plate (20) is installed at the bottom of the tension sensor (19), and two groups of shielding plates (21) are respectively fixedly connected to the bottom of the movable plate (20), and the stainless steel plate sample is driven by the first hydraulic rod (7) to contact the shielding plate (21), and pressure is continuously applied to perform a bending test on the stainless steel plate sample; The clamping assembly comprises a support (22), wherein the support (22) is fixed to the top of the movable plate (20), the top of the support (22) passes through the pressure tank (1) and is fixedly connected to a servo motor (23), the output end of the servo motor (23) passes through the support (22) and is fixedly connected to a first bevel gear (24), the bottom of the first bevel gear (24) is meshed with a second bevel gear (25), and the axis of the second bevel gear (25) is fixedly connected to a threaded rod (26); A clamping plate (27) is threadedly connected to the surface of the threaded rod (26), and the front end and the rear end of the threaded rod (26) are movably connected to the shielding plate (21). When the second hydraulic rod (18) drives the clamping plate (27) and the shielding plate (21) to move upward, a tensile test is performed on the stainless steel plate sample.

2. The device for testing high temperature water stress corrosion of micro-specimens of in-service pressure-bearing equipment according to claim 1 is characterized in that: The rotating assembly comprises a guide groove (11), the guide groove (11) is arranged at the top of the base (5), a rotating block (12) is fixedly connected to the bottom of the support shaft (9), a driving motor (13) is installed at the bottom of the base (5), a reducer (14) is installed at the output end of the driving motor (13), an output shaft (15) is installed at the top of the reducer (14), a rotating seat (16) is installed at the top of the output shaft (15), and a clamping groove (17) is arranged at the top of the rotating seat (16).

3. The device for testing high temperature water stress corrosion of micro-specimens of in-service pressure-bearing equipment according to claim 2 is characterized in that: The rotating block (12) is slidably connected to the inner wall of the guide groove (11), and the size of the rotating block (12) is the same as the size of the clamping groove (17).

4. The device for testing high temperature water stress corrosion of micro-specimens of in-service pressure-bearing equipment according to claim 1 is characterized in that: A sliding block is fixedly connected to the top of the clamping plate (27), and the sliding block is slidably connected to the bottom of the moving plate (20).

5. The device for testing high temperature water stress corrosion of micro-specimens of in-service pressure-bearing equipment according to claim 1 is characterized by: The front side of the pressure tank (1) is movably connected to a sealing door (28), and the front side of the sealing door (28) is fixedly connected to a handle.

6. The device for testing high temperature water stress corrosion of micro-specimens of in-service pressure-bearing equipment according to claim 1 is characterized by: A protective shell (29) is sleeved on the surface of the support (22), and the bottom of the protective shell (29) is fixedly connected to the pressure tank (1).

7. The device for testing high temperature water stress corrosion of micro-specimens of in-service pressure-bearing equipment according to claim 1 is characterized by: The top of the storage plate (10) is fixedly connected to a limit plate (30), one side of the storage plate (10) is fixedly connected to a vertical plate (31), the vertical plate (31) is internally threadedly connected to a bolt rod (32), and one side of the bolt rod (32) is movably connected to a fixed plate (33).

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