A stress detection device and method for a pressure vessel

Abstract

The application relates to the technical field of quality detection, and particularly discloses a pressure container stress detection device and method, wherein the pressure container stress detection device comprises a magnetic sensing part, a positioning part and a moving part; the magnetic sensing part is internally provided with a magnetization assembly and a magnetic field detection assembly; the positioning part is arranged on a component to be detected, and the positioning part is internally provided with an installation groove facing the component to be detected; the magnetic sensing part is arranged in the installation groove, one end of the moving part is movably arranged in the installation groove and connected with the magnetic sensing part; the moving part can drive the magnetization end of the magnetization assembly and the detection end of the magnetic field detection assembly of the magnetic sensing part to abut against the component to be detected; and the moving part can also drive the magnetization end of the magnetization assembly to rotate around the circumference of the moving part by a preset angle. The influence of the paint surface on the detection result is avoided, the accuracy of the detection result is improved, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of quality inspection technology, and specifically relates to a pressure vessel stress testing device and method. Background Technology

[0002] Pressure vessels, as critical equipment in the refining and chemical industry, inevitably introduce stress during early processes such as welding and cutting. This increases the risk of major safety accidents such as rupture, corrosion, leakage, fire, and explosion during the later stages of service. Therefore, the stress test results of pressure vessels are crucial for ensuring quality.

[0003] Currently, stress in pressure vessels is typically detected using sound, light, magnetism, or X-rays to measure stress in multiple directions at the test location. However, before using sound, light, or X-rays, the surface of the pressure vessel needs to be polished to prevent the paint from affecting the accuracy of the stress test results, which is time-consuming. While magnetic testing is not affected by the paint, it requires measuring stress in multiple directions at the test location separately. This necessitates constant adjustments to the testing device's orientation by the operator, which can easily lead to misalignment and affect the accuracy of the results. To improve accuracy, the operator must continuously calibrate the testing device's orientation, which also takes considerable time.

[0004] Therefore, the stress detection efficiency of existing pressure vessels is relatively low. Summary of the Invention

[0005] To address the above problems, this invention proposes a pressure vessel stress detection device and method, wherein the pressure vessel stress detection device includes:

[0006] A magnetic sensing unit, wherein a magnetization component and a magnetic field detection component are disposed therein;

[0007] A positioning part is provided, which is covered on the component to be tested. The positioning part has an installation groove inside, and the groove opening faces the component to be tested.

[0008] A movable part, one end of which is movably inserted into the mounting groove;

[0009] The magnetic sensing unit is disposed at one end of the moving part near the opening of the mounting groove;

[0010] The moving part can drive the magnetic sensing part to move towards the slot opening of the mounting groove until the magnetizing end of the magnetizing component and the detection end of the magnetic field detection component abut against the component to be tested.

[0011] The moving part can also drive the magnetized end of the magnetization component to rotate around the moving part by a preset angle.

[0012] In some specific embodiments, the positioning part includes:

[0013] A first housing, wherein an opening is provided on one side of the first housing to form the groove of the mounting slot;

[0014] The other side of the first housing has a through hole through which one end of the movable part can be movably inserted, and the through hole is directly opposite the opening of the mounting groove.

[0015] In some specific embodiments, the first housing is cylindrical;

[0016] Multiple angle marks are evenly arranged around the circumference of the first housing.

[0017] In some specific embodiments, the moving part includes:

[0018] The mounting component is disposed within the mounting slot, and the magnetic sensing unit is disposed on the mounting component;

[0019] A movable component, one end of which is rotatably inserted through the through hole and connected to the mounting component.

[0020] In some specific embodiments, the moving component includes:

[0021] A movable rod, one end of which is rotatably inserted through the through hole;

[0022] A handle is fixedly sleeved on the outer periphery of the other end of the movable rod.

[0023] In some specific embodiments, a spring is provided between the handle and the first housing;

[0024] The spring is movably sleeved on the outer periphery of the moving rod.

[0025] In some specific embodiments, one side of the handle is provided with an extension section along the radial direction of the first housing;

[0026] The extension segment can be oriented toward any of the stated angle marks.

[0027] In some specific embodiments, the installation components include:

[0028] The second housing has an opening on one side near the groove of the mounting slot, forming an embedding groove, in which the magnetic sensing unit is embedded.

[0029] In some specific embodiments, the movable rod has a first wire-passing hole along its axial direction;

[0030] The second housing has a second wire-passing hole on the side away from the groove of the mounting groove;

[0031] The first wire guide hole and the second wire guide hole are coaxially arranged.

[0032] A pressure vessel stress detection method based on the same concept, employing a pressure vessel stress detection device as described in any of the above specific embodiments, includes the following steps:

[0033] The positioning part is placed on the test position of the component to be tested, so that the groove of the mounting slot faces the test position of the component to be tested;

[0034] The moving part drives the magnetic sensing part to move towards the slot opening of the mounting slot until the magnetization end of the magnetization component and the detection end of the magnetic field detection component come into contact with the test position of the component under test.

[0035] An AC pulse is introduced into the magnetization component, which induces a jump in the magnetic domain direction at the test position of the component under test. This causes the magnetic field detection component to receive the change in the magnetic field at the test position of the component under test, and obtains the stress value at the test position of the component under test based on the received change in the magnetic field at the test position of the component under test.

[0036] The moving part drives the magnetic sensing part to move away from the groove opening of the mounting groove, and drives the magnetic sensing part to rotate until the magnetized end of the magnetization component rotates around the circumference of the moving part by a preset angle to another direction.

[0037] The moving part drives the magnetic sensing part to move closer to the groove opening of the mounting slot until the magnetization component and magnetic field detection component rotate in the other direction and come into contact with the test position of the part under test.

[0038] The magnetization component is supplied with an AC pulse again, which induces a change in the magnetic domain direction at the test position of the component under test. This causes the magnetic field detection component to receive the change in the magnetic field at the test position of the component under test again. Based on the received change in the magnetic field at the test position of the component under test, the stress value in another direction at the test position of the component under test is obtained.

[0039] Repeat the above steps to obtain stress values ​​in multiple directions at the test location of the component under test.

[0040] The pressure vessel stress detection device of the present invention magnetizes the test location of the component under test using a magnetization component of a magnetic sensing unit, and detects the change in magnetic field at the test location using a magnetic field detection component of the magnetic sensing unit. This allows for the acquisition of the stress value at the test location, replacing traditional methods using sound, light, or X-rays, avoiding the influence of paint on the test results, and improving accuracy. A moving part moves and rotates the magnetic sensing unit by a preset angle, allowing it to be adjusted to another orientation after rotation, facilitating the acquisition of stress values ​​in another direction at the test location of the component under test, thus improving detection efficiency. Furthermore, a positioning part covering the test location of the component and a mounting groove through which the moving part passes restrict the movement direction of the magnetic sensing unit, reducing adjustment deviations caused by operation after rotation and eliminating the need for operator recalibration of the magnetic sensing unit's orientation, further improving detection efficiency.

[0041] The pressure vessel stress detection method of the present invention uses the pressure vessel stress detection device described above, so it has the same beneficial effects as the pressure vessel stress detection device described above, and therefore will not be described again here.

[0042] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 A schematic diagram of a pressure vessel stress detection device according to an embodiment of the present invention is shown;

[0045] Figure 2 A cross-sectional schematic diagram of the pressure vessel stress detection device in an embodiment of the present invention is shown;

[0046] Figure 3 A top view schematic diagram of the pressure vessel stress detection device in an embodiment of the present invention is shown;

[0047] Figure 4 A schematic diagram of the installation components in an embodiment of the present invention is shown;

[0048] Figure 5 A schematic diagram of the magnetic sensing unit in an embodiment of the present invention is shown;

[0049] Figure 6 A schematic diagram illustrating the principle of obtaining stress values ​​in an embodiment of the present invention is shown;

[0050] Figure 7 A flowchart of a pressure vessel stress detection method according to an embodiment of the present invention is shown.

[0051] In the figure, 100 is the positioning part; 110 is the first housing; 120 is the angle mark; 200 is the moving part; 210 is the moving assembly; 211 is the moving rod; 212 is the handle; 2121 is the extension section; 213 is the spring; 220 is the mounting assembly; 221 is the second housing; 300 is the magnetic sensing part; 310 is the magnetic yoke; 320 is the coil; 330 is the Hall element; and 400 is the component under test. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Reference Figure 1 This invention provides a pressure vessel stress detection device, comprising: a magnetic sensing unit 300, a positioning unit 100, and a moving unit 200. The magnetic sensing unit 300 houses a magnetization component and a magnetic field detection component. The positioning unit 100 covers the component to be tested 400, and has a mounting groove with its opening facing the component to be tested 400. One end of the moving unit 200 is movably inserted into the mounting groove. The magnetic sensing unit 300 is located at the end of the moving unit 200 near the opening of the mounting groove. The moving unit 200 can move the magnetic sensing unit 300 towards the opening of the mounting groove until the magnetization end of the magnetization component and the detection end of the magnetic field detection component abut against the component to be tested 400. The moving unit 200 can also rotate the magnetization end of the magnetization component around the moving unit 200 by a preset angle.

[0054] Specifically, the positioning part 100 has a mounting groove, the opening of which is positioned directly above the test position of the component 400 to be tested, thereby covering the positioning part 100 above the test position of the component 400 to be tested. One end of the moving part 200 is movably inserted into the mounting groove, and this end of the moving part 200 can move towards or away from the test position of the component 400 to be tested. The moving part 200 can also rotate relative to the positioning part 100 by a preset angle. The magnetic sensing unit 300 is located in the mounting groove and is disposed on one end of the moving part 200 that passes through the mounting groove. The magnetic sensing unit 300 is provided with a magnetization component and a magnetic field detection component. The moving part 200 can drive the magnetic sensing unit 300 to move towards the test position of the component under test 400 until the magnetization component and the magnetic field detection component of the magnetic sensing unit 300 come into contact with the test position of the component under test 400. The magnetization component of the magnetic sensing unit 300 can magnetize the test position of the component under test 400 and generate a magnetic field. The magnetic field detection component of the magnetic sensing unit 300 can detect the change of magnetic field at the test position of the component under test. Then, the stress value of the test position of the component under test 400 can be obtained according to the existing calculation method, which replaces the original detection method by sound, light or X-ray, avoids the influence of the paint surface of the component under test 400 on the test results, and improves the accuracy of the test results. Meanwhile, the moving part 200 can also move the magnetic sensing part 300 away from the test position of the component under test 400 after the test is completed until the magnetization component and magnetic field detection component of the magnetic sensing part 300 are separated from the test position of the component under test 400. The moving part 200 can also rotate the magnetic sensing part 300 around the circumference of the moving part 200 relative to the positioning part 100 by a preset angle, so that the magnetization end of the magnetization component of the magnetic sensing part 300 can be adjusted to another set direction relative to the positioning part 100 after rotating by the preset angle, so as to obtain the stress value in another direction of the test position of the component under test after retesting, thereby improving the test efficiency. Meanwhile, by using the positioning part 100 covering the test position of the component to be tested and the mounting groove through which the moving part 200 can pass, the movement direction of the moving part 200 and the magnetic sensing part 300 driven by the moving part 200 can be restricted, thereby reducing the adjustment deviation caused by operation after the magnetic sensing part 300 rotates to a preset angle, avoiding the need for the operator to calibrate the setting direction of the magnetic sensing part 300, and further improving the detection efficiency.

[0055] In some specific embodiments of the present invention, reference is made to... Figure 2 The positioning part 100 includes a first housing 110. One side of the first housing 110 has an opening forming a mounting groove. The other side of the first housing 110 has a through hole through which one end of the movable part 200 movably passes, and the through hole is directly opposite the mounting groove opening.

[0056] Specifically, the first housing 110 is hollow inside, and an opening is provided on one side of the first housing 110, thereby forming a groove for the mounting slot through the opening side of the first housing 110. A through hole is formed in the middle of the side of the first housing 110 opposite to the opening side, so that the through hole can be positioned directly opposite the groove of the mounting slot, and one end of the moving part 200 passes through the through hole into the mounting slot. The structure is simple and flexible, and easy to install and use.

[0057] In some specific embodiments of the present invention, reference is made to... Figure 3 The first housing 110 is cylindrical. Multiple angle marks 120 are evenly arranged around the circumference of the first housing 110.

[0058] Specifically, the first housing 110 has a cylindrical structure, and the opening of the mounting groove and the through hole are coaxial with the axial direction of the first housing 110. Multiple angle marks 120 are provided on the first housing 110, and these angle marks 120 are evenly distributed around the circumference of the first housing 110. The angle between the line connecting any two adjacent angle marks 120 and the axis of the first housing 110 is the preset rotation angle. This facilitates control of the rotation angle and ensures the accuracy of the detection.

[0059] Furthermore, the first housing 110 is made of glass or other transparent material. This facilitates adjustment of the actual rotation angle according to the specific orientation of the magnetic sensing unit 300.

[0060] In some specific embodiments of the present invention, reference is made to... Figure 2 The movable part 200 includes a mounting component 220 and a movable component 210. The mounting component 220 is disposed in a mounting groove, and the magnetic sensing part 300 is disposed on the mounting component 220. One end of the movable component 210 is rotatably inserted through a through hole and connected to the mounting component 220.

[0061] Specifically, the mounting component 220 is disposed in the mounting groove, the magnetic sensing unit 300 is disposed at one end of the mounting component 220 near the groove opening, and one end of the moving component 210 passes through the through hole into the mounting groove and is fixedly connected to the end of the mounting component 220 away from the groove opening. Thus, when the moving component 210 is driven to move along the axial direction of the first housing 110 towards or away from the groove opening, the mounting component 220 and the magnetic sensing unit 300 disposed on the mounting component 220 can be moved together.

[0062] Furthermore, referring to Figure 5The magnetic sensing unit 300 includes a magnetization component and a magnetic field detection component. The magnetization component is a yoke 310, which is U-shaped. A coil 320 is mounted on the yoke 310, wound around the outer wall of the U-shaped yoke 310 at the end furthest from the opening. Alternating current is introduced through the coil 320, causing the yoke 310 to leak magnetic flux, thus forming magnetization ends at the two ends of the open side of the U-shaped yoke 310 that can magnetize contacting components. The magnetic field detection component is a Hall element 330, which is fixedly disposed between the two ends of the open side of the U-shaped yoke 310. When the moving component 210 drives the mounting component 220 and the magnetic sensing unit 300 disposed on the mounting component 220 to move towards the groove opening of the mounting groove along the axial direction of the first housing 110, the two ends of the opening side of the "U"-shaped magnetic yoke 310, namely the magnetized end of the magnetic yoke 310 and the detection end of the Hall element 330, can finally abut against the test position of the component under test 400, so as to facilitate detection.

[0063] In some specific embodiments of the present invention, reference is made to... Figure 2 The movable component 210 includes a movable rod 211 and a handle 212. One end of the movable rod 211 is rotatably inserted through a through hole. The handle 212 is fixedly sleeved on the outer periphery of the other end of the movable rod 211. Specifically, one end of the movable rod 211 slides through the first through hole along its axial direction and is positioned at the end of the mounting groove away from the mounting slot. The handle 212 is fixedly sleeved on the outer periphery of the other end of the movable rod 211. By moving the handle 212, the movable rod 211 can be moved or rotated, thereby driving the mounting component 220 and the magnetic yoke 310 and Hall effect assembly disposed on the mounting component 220 to move. This facilitates use.

[0064] In some specific embodiments of the present invention, reference is made to... Figure 2 A spring 213 is provided between the handle 212 and the first housing 110. The spring 213 is movably sleeved on the outer periphery of the moving rod 211. Specifically, a spring 213 is provided between the bottom surface of the handle 212 and the top surface of the first housing 110. By being sleeved on the outer periphery of the moving rod 211, one end of the spring 213 abuts against the top surface of the first housing 110, and the other end of the spring 213 abuts against the bottom surface of the handle 212. After one test is completed, the operator only needs to release the pressure on the moving rod 211, and the spring force of the spring 213 will drive the moving rod 211 to move the mounting assembly 220 and the magnetic sensing unit 300 in a direction away from the groove opening of the mounting slot.

[0065] In some specific embodiments of the present invention, reference is made to... Figure 3An extension 2121 is provided on one side of the handle 212 along the radial direction of the first housing 110. The extension 2121 can be oriented toward any angle mark 120. Specifically, the extension 2121 is provided on the side of the handle 212 away from the moving rod 211, and the end of the extension 2121 away from the handle 212 extends radially away from the moving rod 211 along the first housing 110. When adjusting the preset rotation angle, the extension 2121 can be oriented toward any angle mark 120, thereby facilitating control of the rotation range.

[0066] In some specific embodiments of the present invention, reference is made to... Figure 4 The mounting assembly 220 includes a second housing 221. The second housing 221 has an opening on one side near the mounting groove, forming an embedding groove, in which the magnetic sensing unit 300 is embedded. Specifically, the second housing 221 has an opening on one side near the mounting groove, thus forming an embedding groove within the second housing 221. The magnetic yoke 310 of the magnetic sensing unit 300 can be precisely embedded in the embedding groove, and the two ends of the opening side of the "U"-shaped magnetic yoke 310 are flush with the groove opening. The installation of the magnetic sensing unit 300 is completed through the embedding groove. When the groove opening of the second housing 221 abuts against the test position of the component under test 400, the two ends of the opening side of the "U"-shaped magnetic yoke 310 and the Hall element 330 located between the two ends of the opening side of the "U"-shaped magnetic yoke 310 can also abut against the test position of the component under test 400.

[0067] Furthermore, the sidewalls of the second housing 221 surround the outer periphery of the magnetic yoke 310, and the top wall of the second housing 221 covers the top of the sidewalls of the second housing 221. The top wall of the second housing 221 and the sidewalls of the second housing 221 are detachably connected, facilitating installation. A gap exists between the middle of the magnetic yoke 310 and the top wall of the second housing 221, thus reserving space for winding the coil 320 in the middle of the "U"-shaped magnetic yoke 310.

[0068] In some specific embodiments of the present invention, reference is made to... Figure 2The movable rod 211 has a first wire-passing hole along its axial direction. The second housing 221 has a second wire-passing hole on the side away from the mounting groove. The first and second wire-passing holes are coaxially arranged. Specifically, one end of the movable rod 211 that passes through the mounting groove is detachably connected to the middle of the top wall of the second housing 221. The first wire-passing hole is opened on the movable rod 211 along its axial direction, and the second wire-passing hole is opened in the middle of the top wall of the second housing 221. When the end of the movable rod 211 that passes through the mounting groove is detachably connected to the middle of the top wall of the second housing 221, the first and second wire-passing holes are connected, allowing cables to pass through them sequentially for connection to the coil 320, thereby providing AC power to the coil 320.

[0069] Reference Figure 6 The present invention also provides a method for stress detection of a pressure vessel, employing a pressure vessel stress detection device as described in any of the above specific embodiments, comprising the following steps:

[0070] The first housing 110 of the positioning part 100 is placed on the test position of the component under test 400, so that the groove of the mounting groove is set towards the test position of the component under test 400.

[0071] The moving rod 211 of the pressing moving part 200 drives the magnetic sensing part 300 to move towards the slot opening of the mounting groove through the second housing 221 covering the outside of the magnetic sensing part 300 until the magnetization end of the magnetization component and the detection end of the magnetic field detection component abut against the test position of the component under test 400.

[0072] An AC pulse is passed through the coil 320 wound on the magnetic yoke 310 of the magnetization component, inducing a change in the magnetic domain direction at the test position of the component under test 400. This causes the Hall element 330 of the magnetic field detection component to receive the change in the magnetic field at the test position of the component under test 400, and to obtain the stress value at the test position of the component under test 400 based on the received change in the magnetic field at the test position of the component under test 400.

[0073] Stop pressing the moving rod 211 of the moving part 200. Under the elastic force of the spring 213, the moving rod 211 drives the magnetic sensing part 300 to move away from the groove opening of the mounting groove. By rotating the handle 212, the magnetic sensing part 300 is rotated by a preset angle, so that the magnetized end of the opening side of the "U"-shaped magnetic yoke 310 rotates around the circumference of the moving rod 211 to another direction.

[0074] Press the moving rod 211 of the moving part 200 again to move the magnetic sensing part 300 towards the slot opening of the mounting groove until the magnetized end of the "U"-shaped magnetic yoke 310 of the magnetization component after rotating to the other direction and the detection end of the Hall element 330 of the magnetic field detection component abut against the test position of the component under test 400.

[0075] An AC pulse is passed through the coil 320 wound on the yoke 310 of the magnetization component again, inducing the magnetic domain direction of the test position of the test component 400 to jump again, so that the Hall element 330 of the magnetic field detection component can receive the magnetic field change of the test position of the test component 400 again, and obtain the stress value of the test position of the test component 400 in another direction based on the received magnetic field change of the test position of the test component 400.

[0076] Repeat the above steps to obtain stress values ​​in multiple directions at the test location of the component under test 400.

[0077] Furthermore, referring to Figure 6 One end of the cable is connected to the coil 320 wound on the yoke 310 through the first and second wire holes, and the other end of the cable is connected to the function generator and the power amplifier. The function generator outputs an AC pulse excitation signal of 50 to 200 Hz, which is amplified by the power amplifier. The amplified AC pulse excitation signal is then input to the coil 320 through the cable to magnetize the yoke 310. When the yoke 310 contacts the test position of the component under test 400, the yoke 310 and the test position of the component under test 400 form a closed magnetic circuit, achieving local magnetization of the test position of the component under test 400.

[0078] Furthermore, referring to Figure 6 The Hall element 330 detects the change in magnetic field at the test position of the component under test 400, and the received magnetic field signal is conditioned by a conditioning circuit to form a corresponding voltage signal, which is then input to the signal acquisition card. The signal acquisition card transmits the acquired voltage signal to the system's host computer software for analysis and processing. Using a pre-established relationship model between stress and voltage signal, the stress value in the current direction at the test position of the component under test 400 can be calculated.

[0079] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure vessel stress detection device, characterized in that, include: A magnetic sensing unit (300) is provided with a magnetization component and a magnetic field detection component; A positioning part (100) is provided on the component to be tested (400). The positioning part (100) has an installation groove, and the opening of the installation groove faces the component to be tested (400). A movable part (200), one end of which is movably inserted into the mounting groove; The magnetic sensing unit (300) is disposed at one end of the moving part (200) near the opening of the mounting groove; The moving part (200) can drive the magnetic sensing part (300) to move towards the slot opening of the mounting groove until the magnetizing end of the magnetizing component and the detection end of the magnetic field detection component abut against the component to be tested (400). The moving part (200) can also drive the magnetized end of the magnetization component to rotate around the moving part (200) by a preset angle.

2. The pressure vessel stress detection device according to claim 1, characterized in that, The positioning part (100) includes: The first housing (110) has an opening on one side to form the groove of the mounting groove; The first housing (110) has a through hole on the other side for one end of the movable part (200) to pass through, and the through hole is directly opposite the opening of the mounting groove.

3. The pressure vessel stress detection device according to claim 2, characterized in that, The first housing (110) is cylindrical; Multiple angle marks (120) are uniformly arranged around the first housing (110) in the circumference.

4. The pressure vessel stress detection device according to claim 3, characterized in that, The moving part (200) includes: Mounting assembly (220), the mounting assembly (220) is disposed in the mounting slot, and the magnetic sensing unit (300) is disposed on the mounting assembly (220); A movable component (210) has one end rotatably inserted through the through hole and connected to the mounting component (220).

5. The pressure vessel stress detection device according to claim 4, characterized in that, The moving component (210) includes: A movable rod (211), one end of which is rotatably inserted through the through hole; A handle (212) is fixedly sleeved on the outer periphery of the other end of the movable rod (211).

6. The pressure vessel stress detection device according to claim 5, characterized in that, A spring (213) is provided between the handle (212) and the first housing (110); The spring (213) is movably sleeved on the outer periphery of the moving rod (211).

7. The pressure vessel stress detection device according to claim 5, characterized in that, An extension section (2121) is provided on one side of the handle (212) along the radial direction of the first housing (110); The extension segment (2121) can be oriented toward any of the angle markers (120).

8. The pressure vessel stress detection device according to claim 5, characterized in that, The installation components (220) include: The second housing (221) has an opening on one side near the groove of the mounting groove to form an embedding groove, and the magnetic sensing part (300) is embedded in the embedding groove.

9. The pressure vessel stress detection device according to claim 8, characterized in that, The movable rod (211) has a first wire hole along its axial direction; The second housing (221) has a second wire hole on the side away from the groove of the mounting groove; The first wire guide hole and the second wire guide hole are coaxially arranged.

10. A method for stress detection of a pressure vessel, employing the pressure vessel stress detection device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: The positioning part (100) is placed on the test position of the component to be tested (400), so that the opening of the mounting groove faces the test position of the component to be tested (400); The moving part (200) drives the magnetic sensing part (300) to move towards the slot opening of the mounting groove until the magnetization end of the magnetization component and the detection end of the magnetic field detection component come into contact with the test position of the component under test (400). An AC pulse is introduced into the magnetization component, which induces a change in the magnetic domain direction at the test position of the component under test (400), so that the magnetic field detection component receives the change in the magnetic field at the test position of the component under test (400), and obtains the stress value at the test position of the component under test (400) based on the received change in the magnetic field at the test position of the component under test (400). The moving part (200) drives the magnetic sensing part (300) to move away from the groove opening of the mounting groove, and drives the magnetic sensing part (300) to rotate until the magnetized end of the magnetization component rotates around the circumference of the moving part (200) by a preset angle to another direction. The moving part (200) once again drives the magnetic sensing part (300) to move towards the slot opening of the mounting groove until the magnetization component and magnetic field detection component rotate in the other direction and come into contact with the test position of the component under test (400); The magnetization component is supplied with an AC pulse again, which induces a change in the magnetic domain direction at the test position of the component under test (400), so that the magnetic field detection component receives the magnetic field change at the test position of the component under test (400) again, and obtains the stress value in another direction of the test position of the component under test (400) based on the received magnetic field change at the test position of the component under test (400). Repeat the above steps to obtain stress values ​​in multiple directions at the test location of the component under test (400).

Images