Impact corrosion resistance alternating load fatigue test device and use method thereof

Abstract

The invention discloses an impact-corrosion-resistant alternating load fatigue test device and a use method thereof.The impact-corrosion-resistant alternating load fatigue test device comprises a test box, a first clamp is fixedly installed on one side in the test box, a second clamp is rotatably installed on the other side in the test box, and the impact-corrosion-resistant alternating load fatigue test device further comprises a driving part installed outside the test box; the driving part is in transmission connection with the second clamp through the magnetic coupler; the spiral pipe is installed in the test box, spiral lines are arranged on the inner wall of the spiral pipe in the length direction, and a jacket is arranged outside the spiral pipe; the medium supply system is communicated with the upper end and the lower end of the jacket; and the liquid supply mechanism is communicated with the spiral pipe. And the test requirements of stress change and fatigue accumulation effect in the material under the action of alternating load and impact effect under high-pressure rotating water flow can be met. And a refrigerating medium or a heating medium is introduced into the jacket through the medium supply system, so that the temperature of the corrosive liquid passing through the spiral pipe is controlled, and the temperature of the corrosive liquid is convenient to adjust.

Description

Technical Field

[0001] The invention relates to the technical field of fatigue testing, and in particular to an impact corrosion resistant alternating load fatigue testing device and a use method thereof. Background Art

[0002] In the field of materials science and engineering, it is crucial to evaluate the durability and reliability of materials in complex environments. Especially for those components that need to withstand alternating loads and corrosive environments, such as offshore engineering structures, chemical equipment, and components in the aerospace field, their impact corrosion resistance and rotational fatigue performance are directly related to the safety and service life of the entire system.

[0003] Traditional impact corrosion tests usually only focus on the impact of a single corrosive medium on the material surface, ignoring the stress changes and fatigue accumulation effects inside the material under alternating loads and the impact effects under high-pressure rotating water flow. At the same time, most existing fatigue test devices lack precise control of environmental factors, making it difficult to accurately evaluate the comprehensive performance of materials in complex environments. In addition, traditional test devices also have limitations in maintaining the airtightness of the test environment and achieving alternating load loading, which limits the accuracy and reliability of the test. To this end, an impact corrosion resistant alternating load fatigue test device is proposed.

[0004] Chinese patent document CN117907200 A, publication (announcement) date: 2024.04.19, discloses a hydrochloric acid corrosion test box with a rotating spray assembly in the technical field of hydrochloric acid corrosion test box. The present invention can clamp and rotate the product under the action of the clamping rotating assembly, and then drive the spray head to reciprocate left and right under the action of the reciprocating moving assembly. The spray head can spray hydrochloric acid on the surface of the product comprehensively and evenly to avoid dead corners where hydrochloric acid is leaked, thereby improving the test results; its shortcomings are: it cannot simulate the corrosive liquid to impact the workpiece to be tested with a rotating water flow, and it cannot conveniently adjust the temperature of the corrosive liquid. Summary of the invention

[0005] In order to solve the current technical problems, the main purpose of the present invention is to provide an impact corrosion resistant alternating load fatigue testing device and its use method, so as to solve the problems that the existing testing devices cannot simulate the corrosive liquid to impact the workpiece to be tested with a rotating water flow, and cannot conveniently adjust the temperature of the corrosive liquid.

[0006] The technical solution adopted by the present invention is: an impact corrosion resistance alternating load fatigue test device, including a test box, a first clamp is fixedly installed on one side of the test box, and a second clamp is rotatably installed on the other side, and also includes: A driving unit, the driving unit is installed outside the test box, and the driving unit is connected to the second fixture through a magnetic coupler; A spiral tube, wherein the spiral tube is installed in the test box, the inner wall of the spiral tube is provided with spiral patterns along the length direction, and the outer part of the spiral tube is provided with a jacket; A medium supply system, the medium supply system being connected to the upper and lower ends of the jacket and used for introducing a refrigeration medium or a heating medium into the jacket; The liquid supply mechanism is connected with the spiral tube and is used for providing the corrosive liquid to the spiral tube.

[0007] The liquid supply mechanism includes a water supply component and a solution tank, which is connected to the water supply component through a liquid supply pipe, on which a first lifting pump and a flow meter are installed, and the water supply component includes a water tank, in which a stirring component, a refrigeration element, an electric heater and a second temperature sensor are installed, a water supply pipe is installed on the water tank, the bottom of the water supply pipe extends into the water tank, the top of the water supply pipe is connected to the spiral pipe, a second lifting pump is installed on the water supply pipe, and the liquid supply pipe is connected to the water tank.

[0008] It also includes a heating test bench, which is installed on the inner bottom wall of the test box. The first clamp is fixedly installed at one end of the heating test bench, and the second clamp is rotatably installed at the other end of the heating test bench.

[0009] A vibration device is installed at the bottom of the heating test bench.

[0010] The invention also comprises a vacuum system, which is communicated with the test box and is used for adjusting the air pressure inside the test box.

[0011] An equipment cabinet is installed at the bottom of the test box, and the liquid supply mechanism is installed in the equipment cabinet.

[0012] A refrigeration system and a first temperature sensor are also installed in the test box. The first temperature sensor is used to detect the temperature in the test box and control the refrigeration system.

[0013] The test box is provided with an oxygen supply interface, and an air oxygen content sensor is also installed in the test box. The oxygen supply interface is used to connect with the oxygen supply equipment.

[0014] The rotation radius of the spiral tube at the water inlet end is greater than the rotation radius of the water outlet end. The method for using the impact corrosion resistance alternating load fatigue test device comprises the following steps: One end of the workpiece to be measured is fixedly mounted on the first fixture, and the other end is mounted on the second fixture; The driving unit drives the second clamp to rotate back and forth alternately through the magnetic coupling; The liquid supply mechanism supplies the corrosive liquid to the spiral tube, and the corrosive liquid sprays out a spiral water flow through the lower end of the spiral tube to impact the workpiece to be tested; The medium supply system supplies cooling medium or heating medium into the jacket outside the spiral tube to adjust the temperature of the corrosive liquid.

[0015] The present invention has the following beneficial effects: 1. The present invention provides corrosive liquid with different ion concentrations through a liquid supply mechanism, and sprays it accurately onto the surface of the workpiece to be tested with the help of a spiral tube, thereby realizing an accurate simulation of the material corrosion environment. The inner wall of the spiral tube is provided with spiral patterns along the length direction. When the liquid supply mechanism provides corrosive liquid with pressure to the spiral tube, the corrosive liquid passes through the spiral tube, sprays a spiral water flow, and impacts the workpiece to be tested, thereby meeting the test requirements of stress changes and fatigue accumulation effects inside the material under alternating loads, as well as the impact effect under high-pressure rotating water flow. At the same time, the water temperature in the spiral tube is adjusted through the medium supply system and the jacket, and high-temperature or low-temperature corrosive liquid is output, thereby comprehensively simulating a complex environment, further enhancing the controllability and authenticity of the test environment.

[0016] 2. In the present invention, the driving part is connected to the second fixture through a magnetic coupler, which not only realizes the rotation fatigue test of the workpiece to be tested, but also ensures the airtightness of the test box, so that the test piece can be loaded with alternating loads in a closed water environment.

[0017] 3. The present invention realizes continuous adjustment of the vibration loading frequency of the specimen through the output power of the vibration device, thereby more accurately simulating the alternating load changes under actual working conditions.

[0018] 4. The present invention can adjust the water flow rate and temperature of the corrosive liquid by accurately controlling the solenoid valve and the liquid supply mechanism on the branch pipe, thereby realizing precise control of the impact corrosion fatigue test; by calculating the vibration frequency of the specimen and adjusting the impact velocity of the water in the spiral tube, the resonance of the specimen with the water environment and the Karman vortex street phenomenon during fatigue loading are realized, thereby further improving the accuracy and reliability of the test.

[0019] 5. The device of the present invention is not only suitable for the performance evaluation of traditional materials, but also can be used for the durability research of new composite materials, coating materials, etc. under the combined action of high corrosion and alternating loads, providing a more comprehensive and accurate test method for the research in the field of materials science and engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the test device of the present invention.

[0022] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0023] Figure 3 It is a three-dimensional diagram of the test device of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the spiral tube of the present invention.

[0025] Among them, 1. test box; 2. equipment cabinet; 3. control system; 4. vacuum system; 5. vibration device; 6. heating test bench; 7. first fixture; 8. second fixture; 9. workpiece to be tested; 10. drive unit; 11. magnetic coupler; 12. spiral tube; 13. branch pipe; 14. solenoid valve; 15. medium supply system; 16. refrigeration system; 17. first temperature sensor; 18. oxygen supply interface; 19. air oxygen content sensor; 20. solution tank; 21. liquid supply pipe; 22. first lifting pump; 23. flow meter; 24. water tank; 25. refrigeration element; 26. electric heater; 27. second temperature sensor; 28. water supply pipe; 29. ​​second lifting pump; 30. stirring motor; 31. rotating shaft; 32. stirring blade; 33. drain pipe; 34. drain valve; 35. universal wheel; 36. observation window. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1: See also Figure 1-3 The present invention provides an impact corrosion resistance alternating load fatigue test device, comprising a test box 1, a first fixture 7 is fixedly installed on one side of the test box 1, and a second fixture 8 is rotatably installed on the other side, and further comprising: A driving unit 10, which is installed outside the test box 1 and is connected to the second fixture 8 through a magnetic coupling 11; The spiral tube 12 is installed in the test box 1, the inner wall of the spiral tube 12 is provided with spiral patterns along the length direction, and the outer part of the spiral tube 12 is provided with a jacket; A medium supply system 15, which is connected to the upper and lower ends of the jacket and is used to introduce a cooling medium or a heating medium into the jacket; The liquid supply mechanism is connected to the spiral tube 12 and is used to provide the corrosive liquid to the spiral tube 12 .

[0028] The first clamp 7 is used to clamp one end of the workpiece 9 to be tested, and the second clamp 8 is used to clamp the other end of the workpiece 9 to be tested. The driving part 10 is connected to the second clamp 8 through the magnetic coupling 11, so as to realize the application of the rotational alternating load to the workpiece 9 to be tested. The inner wall of the spiral tube 12 is provided with spiral lines along the length direction. When the liquid supply mechanism provides the corrosive liquid with pressure to the spiral tube 12, the corrosive liquid passes through the spiral tube 12, sprays out a spiral water flow, and impacts the workpiece 9 to be tested, thereby meeting the stress change and fatigue accumulation effect inside the material under the action of the alternating load, and the test requirements of the impact effect under the high-pressure rotating water flow. And through the medium supply system 15, the refrigeration medium or the heating medium is introduced into the jacket, so as to control the temperature of the corrosive liquid passing through the spiral tube 12, and it is convenient to adjust the temperature of the corrosive liquid.

[0029] See also Figure 1 , 4 The spiral tube 12 has a spiral structure, which increases the flow length of the corrosive liquid and facilitates temperature control. The spiral lines on the inner wall of the spiral tube 12 cause the water to rotate when passing through the spiral tube 12. Under the action of pressure, the corrosive liquid sprays out a high-pressure spiral water flow. In addition, the inner wall of the spiral tube 12 has a larger heat exchange area, which is convenient for heat exchange with the cooling medium or the heating medium. Specifically, Figure 4 As shown, the spiral pattern on the inner wall of the spiral tube 12 is a spiral ring structure.

[0030] In this embodiment, two spiral tubes 12 are provided, both of which are installed in the test box 1. The top of the spiral tube 12 is connected to the liquid supply mechanism through a branch pipe 13, and a nozzle is installed at the bottom, the nozzle faces the workpiece 9 to be tested, and an electromagnetic valve 14 is installed on the branch pipe 13.

[0031] The present invention provides corrosive liquid with different ion concentrations through a liquid supply mechanism, and sprays it onto the surface of the workpiece 9 to be tested by means of a spiral tube 12. The water flow is accelerated by the spiral tube 12 and then discharged as a spiral water flow, thereby achieving an accurate simulation of the material corrosion environment. At the same time, the water temperature in the spiral tube 12 is adjusted through the medium supply system 15 and the jacket, and high-temperature or low-temperature corrosive liquid is output, thereby comprehensively simulating a complex environment, further enhancing the controllability and authenticity of the test environment.

[0032] In the present invention, the driving part 10 is connected to the second fixture 8 through the magnetic coupler 11, which not only realizes the rotation fatigue test of the workpiece 9 to be tested, but also ensures the airtightness of the test box 1, so that the test piece is loaded with alternating loads in a closed water environment.

[0033] For details, see Figure 1 , 2The liquid supply mechanism includes a water supply component and a solution tank 20. The solution tank 20 is connected to the water supply component through a liquid supply pipe 21. A first lifting pump 22 and a flow meter 23 are installed on the liquid supply pipe 21. The water supply component includes a water tank 24. A stirring component, a refrigeration element 25, an electric heater 26 and a second temperature sensor 27 are installed in the water tank 24. A water supply pipe 28 is installed on the water tank 24. The bottom of the water supply pipe 28 extends into the water tank 24. The top of the water supply pipe 28 is connected to the spiral tube 12. A second lifting pump 29 is installed on the water supply pipe 28. The liquid supply pipe 21 is connected to the water tank 24.

[0034] The stirring assembly includes a stirring motor 30 mounted on the water tank 24 . The output shaft of the stirring motor 30 extends into the water tank 24 . The output shaft of the stirring motor 30 is mounted with a rotating shaft 31 via a coupling. A plurality of stirring blades 32 are mounted on the rotating shaft 31 .

[0035] The solution tank 20 stores the pre-prepared corrosive liquid and is connected to the water supply assembly through the liquid supply pipe 21. The first lift pump 22 is responsible for pumping the corrosive liquid in the solution tank 20 to the water supply assembly, thereby adjusting the ion concentration of the corrosive liquid in the water tank 24; the stirring motor 30 drives the rotating shaft 31 and the stirring blade 32 to rotate to ensure that the solution in the water tank 24 is mixed evenly. The refrigeration element 25 and the electric heater 26 are used to reduce or increase the water temperature respectively, and the second temperature sensor 27 monitors the water temperature to achieve precise temperature control; the second lift pump 29 pumps the water or solution in the water tank 24 to the water supply pipe 28, and then divides it to the two branch pipes 13 through the three-way joint, and finally sprays it out from the nozzle at the bottom of the spiral tube 12.

[0036] Furthermore, the rotation radius of the spiral tube 12 at the water inlet end is greater than the rotation radius at the water outlet end. When the water flows from top to bottom, as the radius decreases, the rotation speed of the water will increase due to the conservation of angular momentum, thereby further increasing the impact speed of the corrosive liquid.

[0037] The test box 1 is also equipped with a refrigeration system 16 and a first temperature sensor 17, which is used to detect the temperature in the test box 1 and control the refrigeration system 16. The first temperature sensor 17 monitors the temperature in the test box 1 in real time to ensure that the test environment temperature meets the preset conditions. Furthermore, an equipment cabinet 2 is installed at the bottom of the test box 1 , and the liquid supply mechanism is installed in the equipment cabinet 2 .

[0038] A drain pipe 33 is installed at the bottom of the side wall of the test box 1, and a drain valve 34 is installed on the drain pipe 33. After the test is completed, the drain valve 34 is opened and the liquid in the test box 1 is discharged through the drain pipe 33, which is convenient for cleaning and preparing for the next test.

[0039] Universal wheels 35 are installed at the four corners of the bottom surface of the equipment cabinet 2, so that the entire test device can be easily moved and transferred between different laboratories or workstations.

[0040] Furthermore, an observation window 36 is provided on the outer wall of the test box 1. The observation window 36 on the outer wall of the test box 1 allows the operator to observe the test process without opening the test box 1, ensuring the safety and continuity of the test; and a lighting device is installed on the observation window 36 to improve the clarity of observation.

[0041] Embodiment 2: On the basis of Example 1, it also includes a heating test bench 6, which is installed on the inner bottom wall of the test box 1, the first clamp 7 is fixedly installed at one end of the heating test bench 6, and the second clamp 8 is rotatably installed at the other end of the heating test bench 6.

[0042] Specifically, the heating test bench 6 includes a test bench body installed on the inner bottom wall of the test box 1, the test bench body has a built-in heating element, and the heating element is electrically connected to the control system 3; the first clamp 7 is fixedly installed on one side of the top surface of the test bench body, and the second clamp 8 is rotatably connected to the other side of the top surface of the test bench body; the built-in heating element of the test bench body is heated according to the instructions of the control system 3 so that the workpiece 9 to be tested reaches a preset temperature.

[0043] In the present invention, the first clamp 7 and the second clamp 8 adopt the existing technology, for example, the clamp structure in CN119199673A is adopted. Among them, the first clamp 7 is fixedly mounted on the heating test bench 6 by a T-shaped piece, and the C-shaped piece of the second clamp 8 is fixedly connected with a rotating shaft on the side away from the first clamp 7, and the rotating shaft is rotatably connected with the bearing seat, and the bearing seat is installed on the heating test bench 6. One end of the rotating shaft close to the driving part 10 is installed with one part of the magnetic coupler. The driving part 10 adopts a reduction motor, and the other part of the magnetic coupler is installed on the output shaft of the reduction motor. The structural form of the first clamp 7 and the second clamp 8 can be changed according to the structure of the test piece. The test box 1 is located at the magnetic coupler and adopts a polymer material.

[0044] Embodiment 3: On the basis of Embodiment 2, a vibration device 5 is installed at the bottom of the heating test bench 6. The vibration device 5 provides a vibration test environment for the workpiece 9 to be tested.

[0045] In this embodiment, the vibration device 5 adopts an ultrasonic vibration device, and the output power of the ultrasonic vibration device is controlled to achieve continuous adjustment of the vibration loading frequency of the test piece, thereby more accurately simulating the alternating load changes under actual working conditions.

[0046] Embodiment 4: On the basis of embodiment 1, 2 or 3, a vacuum system 4 is further included. The vacuum system 4 is connected to the test box 1 and is used to adjust the air pressure inside the test box 1.

[0047] For details, see Figure 1 The vacuum system 4 uses a vacuum pump, and the vacuum pump is connected to the test box 1.

[0048] Furthermore, an oxygen supply interface 18 is provided on the test box 1, and an air oxygen content sensor 19 is also installed in the test box 1. The oxygen supply interface 18 is used to connect to an oxygen supply device. The oxygen supply device includes an oxygen generator or an oxygen cylinder.

[0049] After the vacuum system 4 is evacuated, oxygen is introduced into the test box 1 through the oxygen supply device to increase the oxygen concentration in the test box 1 and accelerate the corrosion effect, thereby simulating the corrosion effect under different corrosive liquids and different oxygen concentrations. The air oxygen content sensor 19 is used to detect the oxygen concentration in the test box 1.

[0050] Embodiment 5: The present invention also includes a control system 3, and a liquid supply mechanism, a vacuum system 4, a vibration device 5, a medium supply system 15, a solenoid valve 14, a drive unit 10, a refrigeration system 16 and a heating test bench 6 are all electrically connected to the control system 3; the refrigeration system 16 and the heating test bench 6 can be used to heat and freeze-thaw the environment in the test box 1 to achieve fatigue simulation tests of specimens under various ambient temperatures.

[0051] The control system 3 controls the output power of the vibration device 5 to achieve continuous adjustment of the vibration loading frequency of the workpiece 9 to be measured, thereby more accurately simulating the alternating load changes under actual working conditions.

[0052] The control system 3 can adjust the water flow rate and temperature of the corrosive liquid by accurately controlling the solenoid valve 14 and the liquid supply mechanism on the branch pipe 13, thereby realizing precise control of the impact corrosion fatigue test; by calculating the vibration frequency of the specimen and adjusting the impact velocity of the water in the spiral tube 12, the resonance of the specimen with the water environment and the Karman vortex street phenomenon during fatigue loading are realized, thereby further improving the accuracy of the test.

[0053] The first temperature sensor 17, the air oxygen content sensor 19, the first lift pump 22, the flow meter 23, the stirring assembly, the cooling element 25, the electric heater 26, the second lift pump 29 and the second temperature sensor 27 are all electrically connected to the control system 3. The cooling element 25 and the electric heater 26 are used to lower or raise the water temperature respectively, and the second temperature sensor 27 monitors the water temperature and feeds back to the control system 3 to achieve precise temperature control; the second lift pump 29 pumps the water or solution in the water tank 24 to the water supply pipe 28, and then divides it to the two branch pipes 13 through the three-way joint, and finally sprays it out from the bottom of the spiral tube 12. The built-in heating element of the test bench body is heated according to the instructions of the control system 3 to make the workpiece 9 to be tested reach the preset temperature.

[0054] Embodiment 6: A method for using an impact corrosion resistance alternating load fatigue test device is provided, comprising the following steps: One end of the workpiece 9 to be measured is fixedly mounted on the first fixture 7, and the other end is mounted on the second fixture 8; The driving unit 10 drives the second clamp 8 to rotate back and forth alternately through the magnetic coupling 11; The liquid supply mechanism supplies the corrosive liquid to the spiral tube 12, and the corrosive liquid sprays out a spiral water flow through the spiral tube 12 to impact the workpiece 9 to be measured; The medium supply system 15 supplies a cooling medium or a heating medium into the jacket outside the spiral tube 12 to adjust the temperature of the corrosive liquid.

[0055] A vibration device 5 is installed at the bottom of the heating test bench 6. The vibration device 5 provides a vibration test environment for the workpiece 9 to be tested.

[0056] The vacuum system 4 is connected to the test box 1 and is used to adjust the air pressure inside the test box 1 .

[0057] After the vacuum system 4 is evacuated, oxygen is introduced into the test box 1 through the oxygen supply device to increase the oxygen concentration in the test box 1 and accelerate the corrosion effect, thereby simulating the corrosion effect under different corrosive liquids and different oxygen concentrations.

[0058] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technical users in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An impact corrosion resistance alternating load fatigue test device, comprising a test box (1), a first clamp (7) being fixedly mounted on one side of the test box (1), and a second clamp (8) being rotatably mounted on the other side, characterized in that: Also includes: A driving unit (10), the driving unit (10) being mounted outside the test box (1), the driving unit (10) being transmission-connected to the second fixture (8) via a magnetic coupling (11); A spiral tube (12), the spiral tube (12) being installed in the test box (1), the inner wall of the spiral tube (12) being provided with spiral patterns along the length direction, and the outside of the spiral tube (12) being provided with a jacket; a medium supply system (15), the medium supply system (15) being connected to the upper and lower ends of the jacket and used for introducing a refrigeration medium or a heating medium into the jacket; A liquid supply mechanism, the liquid supply mechanism is connected to the spiral tube (12) and is used to supply corrosive liquid to the spiral tube (12).

2. The impact corrosion resistance alternating load fatigue test device according to claim 1, characterized in that: The liquid supply mechanism comprises a water supply component and a solution tank (20). The solution tank (20) is connected to the water supply component via a liquid supply pipe (21). A first lift pump (22) and a flow meter (23) are installed on the liquid supply pipe (21). The water supply component comprises a water tank (24). A stirring component, a refrigeration element (25), an electric heater (26) and a second temperature sensor (27) are installed in the water tank (24). A water supply pipe (28) is installed on the water tank (24). The bottom of the water supply pipe (28) extends into the water tank (24). The top of the water supply pipe (28) is connected to the spiral tube (12). A second lift pump (29) is installed on the water supply pipe (28). The liquid supply pipe (21) is connected to the water tank (24).

3. The impact corrosion resistance alternating load fatigue test device according to claim 1, characterized in that: It also includes a heating test bench (6), wherein the heating test bench (6) is mounted on the inner bottom wall of the test box (1), a first clamp (7) is fixedly mounted on one end of the heating test bench (6), and a second clamp (8) is rotatably mounted on the other end of the heating test bench (6).

4. The impact corrosion resistance alternating load fatigue test device according to claim 3, characterized in that: A vibration device (5) is installed at the bottom of the heating test bench (6).

5. The impact corrosion resistance alternating load fatigue testing device according to claim 1, characterized in that: It also includes a vacuum system (4), which is connected to the test box (1) and is used to adjust the air pressure inside the test box (1).

6. The impact corrosion resistance alternating load fatigue test device according to claim 1, characterized in that: An equipment cabinet (2) is installed at the bottom of the test box (1), and a liquid supply mechanism is installed in the equipment cabinet (2).

7. The impact corrosion resistance alternating load fatigue test device according to claim 1, characterized in that: A refrigeration system (16) and a first temperature sensor (17) are also installed in the test box (1); the first temperature sensor (17) is used to detect the temperature in the test box (1) and to control the refrigeration system (16).

8. The impact corrosion resistance alternating load fatigue test device according to claim 1, characterized in that: The test box (1) is provided with an oxygen supply interface (18), and an air oxygen content sensor (19) is also installed in the test box (1). The oxygen supply interface (18) is used to connect to an oxygen supply device.

9. The impact corrosion resistance alternating load fatigue testing device according to claim 1, characterized in that: The rotation radius of the spiral tube (12) at the water inlet end is greater than the rotation radius at the water outlet end.

10. A method for using the impact corrosion resistance alternating load fatigue test device according to any one of claims 1 to 9, characterized in that: The following steps are involved: One end of the workpiece (9) to be measured is fixedly mounted on the first fixture (7), and the other end is fixedly mounted on the second fixture (8); The driving unit (10) drives the second clamp (8) to rotate alternately and reciprocatingly via the magnetic coupling (11); The liquid supply mechanism supplies the corrosive liquid to the spiral tube (12), and the corrosive liquid sprays out a spiral water flow through the spiral tube (12) to impact the workpiece to be measured (9); The medium supply system (15) supplies a cooling medium or a heating medium into the jacket outside the spiral tube (12) to adjust the temperature of the corrosive liquid.

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