A degradation detection device and detection method for magnesium alloy materials

Abstract

The present invention discloses a degradation detection device for magnesium alloy materials and a detection method thereof, comprising a degradation external box, wherein a degradation detection box is installed on the degradation external box, the bottom side of the degradation detection box is located in the degradation external box, a box bottom cavity is provided on the degradation external box, and a side cavity is provided on the top inner wall of the box bottom cavity. In the present invention, when performing degradation detection on a magnesium alloy stent, the magnesium alloy stent to be degraded is placed on a placement ring for simulated detection, and the motor is driven to drive the lead screw slider to move back and forth, thereby driving the magnesium alloy stent below to move back and forth. The back and forth movement can simulate the relative flow of the stent and blood in the human body, and the magnesium alloy stent and the liquid are moved relative to each other. The extrusion component is provided, and through the extrusion of the extrusion component, it can simulate the extrusion of the magnesium alloy stent by blood vessels in the human body, and perform an extrusion fatigue test.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a degradation detection device and a detection method for magnesium alloy materials. Background Art

[0002] Stents, also known as coronary artery stents, are commonly used medical devices in cardiac interventional surgery. They have the function of dredging arteries. They first appeared in the 1980s and have gone through the development process of metal stents, drug-coated stents, and bioresorbable stents. Stents have undergone a long period of development and improvement. Research on stents made of magnesium alloy materials requires simulation testing of the performance of these new products in the body.

[0003] However, when traditionally testing magnesium alloy stents, the magnesium alloy stents are directly placed in a test box or test box. However, the blood circulation and movement conditions in the human body are constantly changing. For a dynamic human body, the static testing conditions are inconsistent with the actual situation. At the same time, temperature is also a variable. The temperature of traditional degradation detection liquid is changing and cannot effectively simulate the temperature of the human body. Therefore, a degradation detection device and a detection method for magnesium alloy materials are proposed. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a degradation detection device and detection method for magnesium alloy materials, which are used to solve the problem that the blood circulation and movement conditions in the human body are constantly changing. For a dynamic human body, the detection conditions of a stationary body are inconsistent with the actual situation. At the same time, temperature is also a variable. The temperature of traditional degradation detection liquid is changing and cannot effectively simulate the temperature of the human body.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A degradation detection device for magnesium alloy materials comprises a degradation external box, a degradation detection box is installed on the degradation external box, the bottom side of the degradation detection box is located in the degradation external box, a box bottom cavity is opened on the degradation external box, a side cavity is opened on the top inner wall of the box bottom cavity, a constant temperature heating component is arranged in the box bottom cavity, a mounting plate is fixedly installed on one side of the degradation external box, a driving motor is fixedly installed on one side of the mounting plate, an output end of the driving motor is connected to a rotating shaft, one end of the rotating shaft extends into the degradation detection box and is installed with a mounting block through a moving component, a bottom connecting block is installed on one side of the mounting block through a flipping component, a moving block is movably installed on the bottom side of the bottom connecting block, and a placing A collar is placed, and a magnesium alloy stent is placed on the collar. An extrusion component is provided at the bottom of the moving block, and the extrusion component is used to simulate the extrusion of the magnesium alloy stent by the blood vessel. The moving block is connected to the degradation detection box through a variable adjustment component. A rotating shaft is rotatably installed on the degradation external box, and the rotating shaft is connected to the rotating shaft through a driving component. A liquid stirring component is installed on the rotating shaft. An observation hole is provided on one side of the degradation external box. The degradation detection box is made of transparent glass. A box cover is installed on the top side of the degradation detection box. An ion concentration detector, a pH detector and a temperature sensor are provided on one side of the degradation external box. The ion concentration detector, the pH detector and the temperature sensor all extend into the degradation detection box.

[0007] Preferably, the extrusion component includes a fixed ring fixedly mounted on the bottom end of the moving block, a plurality of telescopic frames fixedly mounted on the inner wall of the fixed ring, a moving rod movably mounted on the plurality of telescopic frames, an end of the moving rod is connected to a pressure sensor, one side of the pressure sensor is connected to an arc-shaped extrusion plate, a limiting clamping ring is fixedly mounted on one side of the fixed ring, a rotating ring is rotatably mounted in the limiting clamping ring, a rotating gear ring is fixedly mounted on one side of the rotating ring, a waterproof motor is fixedly mounted on one side of the moving block, an output end of the waterproof motor is connected to a rotating gear, the rotating gear is meshed with the rotating gear ring, a plurality of arc-shaped adjustment holes are opened on one side of the rotating ring, and an adjustment column is fixedly mounted on one side of the plurality of moving rods, and one end of the plurality of adjustment columns respectively extends into the plurality of arc-shaped adjustment holes.

[0008] Preferably, the extrusion component includes a mounting ring fixedly mounted on the bottom end of the moving block, the inner wall of the mounting ring is fixedly mounted with an airbag sleeve, the airbag sleeve is arranged at the upper half ring position of the mounting ring, a plurality of pushing rods are fixedly mounted on the side of the airbag sleeve, the end of the pushing rod is connected to a pushing pressure plate, one side of the airbag sleeve is connected to the airbag tube, the side of the mounting ring is fixedly mounted with an outer half ring, one side of the outer half ring is provided with a plurality of driving holes, one side of the plurality of pushing rods are fixedly mounted with driving columns, one end of the plurality of driving columns are respectively movably mounted in the plurality of driving holes, the inner wall of the mounting ring is fixedly mounted with a plurality of equipment blocks, the plurality of equipment blocks are arranged at the lower half ring position of the mounting ring, the ends of the plurality of equipment blocks are provided with compression grooves, a compression rod is movably mounted on the compression groove, the end of the compression rod is fixedly mounted with a bottom pressure plate, and the end of the compression rod and the side wall of the compression groove are fixedly mounted with a compression spring.

[0009] Preferably, the pushing plate and the bottom plate are L-shaped or U-shaped structures, and the extrusion component can adopt a pressure sensor or a stroke control method.

[0010] Preferably, the constant temperature heating component includes a heating rod installed on the inner wall of the box bottom cavity, and a control panel is fixedly installed on one side of the degradation external box.

[0011] Preferably, the moving assembly includes a rotating screw fixedly mounted on one end of the rotating shaft, a screw slider is threadedly sleeved on the rotating screw, the bottom side of the screw slider is fixedly connected to the top side of the mounting block, a guide column is fixedly mounted on the inner wall of the degradation detection box, a guide block is fixedly mounted on one side of the screw slider, and the guide block is movably sleeved on the guide column.

[0012] Preferably, the flip assembly includes a swing shaft fixedly mounted on one side of the mounting block, a swing block is rotatably mounted on the swing shaft, a positioning bolt is threadedly mounted on one side of the swing block, one end of the positioning bolt is threadedly mounted on the mounting block, and the bottom side of the swing block is fixedly connected to the top side of the bottom connecting block.

[0013] Preferably, the change adjustment component includes a side block fixedly mounted on the inner wall of the degradation detection box, an arc-shaped guide groove is provided on one side of the side block, an inlet and outlet opening is provided on one side of the arc-shaped guide groove, threaded sleeves are fixedly mounted on both sides of the moving block, guide columns are threadedly mounted on the two threaded sleeves, and the two guide columns are movably mounted in the two arc-shaped guide grooves respectively, a moving groove is provided on the bottom side of the bottom connecting block, the top side of the moving block extends into the moving groove, and one end of a reset spring is fixedly mounted, and the other end of the reset spring is fixedly mounted on the top inner wall of the moving groove.

[0014] Preferably, the driving assembly includes a small wheel fixedly sleeved on the rotating shaft, one end of the rotating shaft extends outside the degradation external box and is fixedly installed with a large wheel, and the small wheel and the large wheel are sleeved with the same wheel belt.

[0015] Preferably, the liquid stirring assembly includes a plurality of bottom flip leakage plates fixedly mounted on a rotating shaft, the bottom flip leakage plates are located in the bottom cavity of the box, a connecting shaft is rotatably mounted on the inner wall of the side cavity, rotating wheels are fixedly sleeved on the connecting shaft and the rotating shaft, the same stirring belt is sleeved on the two rotating wheels, and a plurality of driving leakage plates are fixedly mounted on the outside of the stirring belt.

[0016] Preferably, a fixing ring is fixedly installed on the bottom end of the moving block, a plurality of telescopic frames are fixedly installed on the inner wall of the fixing ring, and a moving rod is movably installed on the multiple telescopic frames, the end of the moving rod is connected to a pressure sensor, and one side of the pressure sensor is connected to an arc-shaped extrusion plate, a limiting clamping ring is fixedly installed on one side of the fixing ring, a rotating ring is rotatably installed in the limiting clamping ring, a rotating gear ring is fixedly installed on one side of the rotating ring, a waterproof motor is fixedly installed on one side of the moving block, the output end of the waterproof motor is connected to a rotating gear, the rotating gear is meshed with the rotating gear ring, a plurality of arc-shaped adjustment holes are opened on one side of the rotating ring, and an adjustment column is fixedly installed on one side of the multiple moving rods, and one end of the multiple adjustment columns extends into the multiple arc-shaped adjustment holes respectively.

[0017] Preferably, the bottom end of the moving block is fixedly installed with a mounting ring, the inner wall of the mounting ring is fixedly installed with an airbag cover, the airbag cover is arranged at the upper half ring position of the mounting ring, a plurality of pushing rods are fixedly installed on the side of the airbag cover, the end of the pushing rod is connected with a pushing pressure plate, one side of the airbag cover is connected to the airbag tube, the side of the mounting ring is fixedly installed with an outer half ring, a plurality of driving holes are opened on one side of the outer half ring, a plurality of pushing rods are fixedly installed on one side of each of the driving columns, one end of each of the driving columns is movably installed in the plurality of driving holes respectively, a plurality of equipment blocks are fixedly installed on the inner wall of the mounting ring, the plurality of equipment blocks are arranged at the lower half ring position of the mounting ring, a compression groove is opened at the end of the plurality of equipment blocks, a compression rod is movably installed on the compression groove, a bottom pressure plate is fixedly installed on the end of the compression rod, and a compression spring is fixedly installed on the end of the compression rod and the side wall of the compression groove.

[0018] A method for detecting degradation of a magnesium alloy material, the method comprising:

[0019] Step 1: When performing degradation testing on a magnesium alloy stent, the magnesium alloy stent to be degraded is placed on a placement collar and placed in a degradation testing box. The box cover is closed for simulated testing. During the testing process, the drive motor is started to drive the rotating shaft to rotate. The movable assembly is set, and after the rotating screw on the movable assembly rotates, it drives the screw slider to move. The drive motor is a forward and reverse motor that can drive the screw slider to move back and forth. During the back and forth movement, it can drive the magnesium alloy stent below to move back and forth. Through the back and forth movement, the relative flow of the stent and blood in the human body can be simulated, so that the magnesium alloy stent and the liquid move relative to each other. Compared with static liquid degradation, the accuracy is higher;

[0020] Step 2: During degradation testing, a constant temperature heating component is set up. Through the control panel, the heating rod can be controlled to perform constant temperature heating. After heating, the liquid in the bottom cavity and side cavity of the box will be heated. Through heating, a constant temperature effect can be achieved. Through heat transfer, the temperature in the degradation testing box is also constant, thus simulating the temperature in the human body, making the degradation data of the magnesium alloy stent more accurate.

[0021] Step 3: During the degradation detection process, the driving component is set. After the rotating shaft rotates, the small wheel, the large wheel and the wheel belt can drive the rotating shaft to rotate. The liquid stirring component is set. By rotating, it can drive multiple bottom flip leaking plates to rotate, and the liquid at the bottom can be stirred, so that the heated heat can be evenly distributed. At the same time, under the action of the rotating wheel and the stirring belt, the liquid in the side cavity and the bottom cavity of the box is stirred and mixed. The heat heated at the bottom can be evenly transferred to the side cavity, so that the temperature change of the liquid is small.

[0022] Step 4: When the magnesium alloy bracket is moving, the movement of the moving block will drive the guide column to rotate. One end of the guide column moves in the arc-shaped guide groove, which can drive the moving block to move up and down, with a certain vibration, thereby simulating the movement of the human body. The moving block can move in the moving groove and reset the spring to achieve the movement adjustment of the moving block. By simulating the movement of the human body, the degradation of the magnesium alloy bracket can be more in line with the usage;

[0023] Step 5: When the magnesium alloy stent is moving, the extrusion component is set to simulate the extrusion of the magnesium alloy stent by blood vessels inside the human body through the extrusion of the extrusion component, and perform an extrusion fatigue test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a left-side perspective structural diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the present invention from a right perspective;

[0026] Figure 3 It is a schematic diagram of the structure of the vertical section of the present invention;

[0027] Figure 4 It is a schematic structural diagram of the side section of the present invention;

[0028] Figure 5 It is a schematic structural diagram of a partial cross-section of the present invention;

[0029] Figure 6 For the present invention Figure 3 Schematic diagram of the structure of part A;

[0030] Figure 7 This is a schematic structural diagram of an extrusion component according to an embodiment of the present invention;

[0031] Figure 8 For the present invention Figure 7 Schematic diagram of the cross-section structure;

[0032] Figure 9 For the present invention Figure 7 Schematic diagram of the explosion structure;

[0033] Figure 10 This is a schematic diagram of the structure of multiple groups of extrusion components combined in the present invention;

[0034] Figure 11 This is a schematic structural diagram of an extrusion component in the second embodiment of the present invention;

[0035] Figure 12 For the present invention Figure 11 Schematic diagram of the structure in side section;

[0036] Figure 13 For the present invention Figure 11 Schematic diagram of the vertical section structure.

[0037] 1. Degradation external box; 2. Degradation detection box; 3. Box cover; 4. Box bottom cavity; 5. Side cavity; 6. Heating rod; 7. Control panel; 8. Mounting plate; 9. Driving motor; 10. Rotating shaft; 11. Rotating screw; 12. Screw slider; 13. Mounting block; 14. Swinging shaft; 15. Swinging block; 16. Positioning bolt; 17. Bottom connecting block; 18. Moving groove; 19. Moving block; 20. Return spring; 21. Placement ring; 22. Magnesium alloy bracket; 23. Guide column; 24. Guide block; 25. Side block; 26. Arc guide groove; 27. Inlet and outlet opening; 28. Guide column; 29. ​​Threaded sleeve; 30. Rotating shaft; 31. Bottom flip leak plate; 32. Small turntable; 33. Large turntable; 34. Turntable belt; 3 5. Connecting shaft; 36. Rotating wheel; 37. Stirring belt; 38. Driving leak plate; 39. Observation hole; 40. Ion concentration detector; 41. pH detector; 42. Temperature sensor; 43. Fixed ring; 44. Telescopic frame; 45. Moving rod; 46. Pressure sensor; 47. Arc extrusion plate; 48. Limiting clamp; 49. Rotating ring; 50. Rotating gear ring; 51. Waterproof motor; 52. Rotating gear; 53. Arc-shaped adjustment hole; 54. Adjusting column; 55. Mounting ring; 56. Airbag cover; 57. Push rod; 58. Push pressure plate; 59. Outer half ring; 60. Driving column; 61. Driving hole; 62. Airbag tube; 63. Equipment block; 64. Compression groove; 65. Compression rod; 66. Compression spring; 67. Bottom pressure plate. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 making creative efforts are within the scope of protection of the present invention.

[0039] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly, for example, to mean fixed, detachable, or integrally connected; mechanically or electrically connected; directly or indirectly through an intermediate medium, or as internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this patent in specific contexts.

[0040] Example 1:

[0041] Example: Refer to Figure 1-9 , a degradation detection device for magnesium alloy materials, comprising a degradation external box 1, a degradation detection box 2 is installed on the degradation external box 1, the bottom side of the degradation detection box 2 is located in the degradation external box 1, a box bottom cavity 4 is opened on the degradation external box 1, a side cavity 5 is opened on the top inner wall of the box bottom cavity 4, a constant temperature heating component is provided in the box bottom cavity 4, a mounting plate 8 is fixedly installed on one side of the degradation external box 1, a driving motor 9 is fixedly installed on one side of the mounting plate 8, the output end of the driving motor 9 is connected to a rotating shaft 10, one end of the rotating shaft 10 extends into the degradation detection box 2, and a mounting block 13 is installed through a moving component, a bottom connecting block 17 is installed on one side of the mounting block 13 through a flipping component, a moving block 19 is movably installed on the bottom side of the bottom connecting block 17, and a placement ring 2 is provided on the bottom side of the moving block 19 1. A magnesium alloy bracket 22 is placed on the placement ring 21. An extrusion component is provided at the bottom of the moving block 19. The extrusion component is used to simulate the extrusion of the magnesium alloy bracket 22 by the blood vessel. The moving block 19 is connected to the degradation detection box 2 through a variable adjustment component. A rotating shaft 30 is rotatably installed on the degradation external box 1. The rotating shaft 10 is connected to the rotating shaft 30 through a driving component. A liquid stirring component is installed on the rotating shaft 30. An observation hole 39 is provided on one side of the degradation external box 1. The degradation detection box 2 is made of transparent glass. A box cover 3 is installed on the top side of the degradation detection box 2. An ion concentration detector 40, a pH detector 41 and a temperature sensor 42 are provided on one side of the degradation external box 1. The ion concentration detector 40, the pH detector 41 and the temperature sensor 42 all extend into the degradation detection box 2.

[0042] As a technical optimization solution of the present invention, the constant temperature heating component includes a heating rod 6 installed on the inner wall of the bottom cavity 4 of the box, and a control panel 7 is fixedly installed on one side of the degradation external box 1. The constant temperature heating component is set up, and the control panel 7 is controlled to control the heating rod 6 to perform constant temperature heating. After heating, the liquid in the bottom cavity 4 and the side cavity 5 of the box will be heated. Through heating, a constant temperature effect can be achieved. Through heat transfer, the temperature in the degradation detection box 2 is also constant, thereby simulating the temperature in the human body, making the degradation data of the magnesium alloy bracket 22 more accurate.

[0043] As a technical optimization solution of the present invention, the moving component includes a rotating screw 11 fixedly mounted on one end of the rotating shaft 10, a screw slider 12 is threadedly sleeved on the rotating screw 11, the bottom side of the screw slider 12 is fixedly connected to the top side of the mounting block 13, a guide column 23 is fixedly mounted on the inner wall of the degradation detection box 2, a guide block 24 is fixedly mounted on one side of the screw slider 12, and the guide block 24 is movably sleeved on the guide column 23, the magnesium alloy bracket 22 to be degraded is placed on the placement ring 21, and is placed in the degradation detection box 2, and the box cover 3 is closed to simulate Detection. During the detection process, the drive motor 9 is started to run, driving the rotating shaft 10 to rotate. The moving component is set. After the rotating screw 11 on the moving component rotates, it will drive the screw slider 12 to move. The drive motor 9 is a forward and reverse motor, which can drive the screw slider 12 to move back and forth. In the process of moving back and forth, it can drive the magnesium alloy bracket 22 below to move back and forth. Through the back and forth movement, it can simulate the relative flow of the bracket and blood in the human body, and make the magnesium alloy bracket 22 move relative to the liquid. Compared with static liquid degradation, the accuracy is higher.

[0044] As a technical optimization solution of the present invention, the flip assembly includes a swing shaft 14 fixedly mounted on one side of the mounting block 13, and a swing block 15 is rotatably mounted on the swing shaft 14. A positioning bolt 16 is threadedly mounted on one side of the swing block 15, and one end of the positioning bolt 16 is threadedly mounted on the mounting block 13. The bottom side of the swing block 15 is fixedly connected to the top side of the bottom connecting block 17, and a moving groove 18 is provided on the bottom side of the bottom connecting block 17. The top side of the moving block 19 extends into the moving groove 18 and is fixedly mounted with one end of a return spring 20. The other end of the return spring 20 is fixedly mounted on the top inner wall of the moving groove 18. The change adjustment assembly includes a side block 25 fixedly mounted on the inner wall of the degradation detection box 2, and an arc-shaped guide groove 26 is provided on one side of the side block 25. An inlet and outlet opening 27 is provided on one side of the arc-shaped guide groove 26. Threaded sleeves 29 are fixedly mounted on both sides of the moving block 19, and guide columns 28 are threadedly mounted on the two threaded sleeves 29. The two guide columns 28 are movable The magnesium alloy bracket 22 is dynamically installed in the two arc-shaped guide grooves 26. During the movement, the movement of the moving block 19 will drive the guide column 28 to rotate. One end of the guide column 28 moves in the arc-shaped guide groove 26, and the movement can drive the moving block 19 to move up and down, with a certain vibration, thereby simulating the movement of the human body. The moving block 19 can move in the moving groove 18 and reset the spring 20 to achieve the movement adjustment of the moving block 19. By simulating the movement of the human body, the degradation of the magnesium alloy bracket 22 is more in line with the usage conditions. A threaded sleeve 29 is provided, and one end of the guide column 28 is a threaded end, which can realize threaded connection. The inlet and outlet openings 27 are provided, and the inlet and outlet openings 27 have a wide range, which can facilitate the free entry of the guide column 28. After the guide column 28 goes out of the inlet and outlet openings 27, the positioning bolt 16 is rotated to open the swing block 15, and the swing block 15 rotates on the swing shaft 14, so that the bottom connecting block 17 can be rotated. The magnesium alloy bracket 22 can be taken out after flipping.

[0045] As a technical optimization solution of the present invention, the driving component includes a small wheel 32 fixedly sleeved on the rotating shaft 10, one end of the rotating shaft 30 extends to the outside of the degradation external box 1, and is fixedly installed with a large wheel 33, and the small wheel 32 and the large wheel 33 are sleeved with the same wheel belt 34, and the liquid stirring component includes a plurality of bottom flip leakage plates 31 fixedly mounted on the rotating shaft 30, the bottom flip leakage plate 31 is located in the bottom cavity 4 of the box, and a connecting shaft 35 is rotatably installed on the inner wall of the side cavity 5, and a rotating wheel 36 is fixedly sleeved on the connecting shaft 35 and the rotating shaft 30, and the two rotating wheels 36 are sleeved with the same stirring belt 37, and the stirring belt 37 A plurality of driving leak plates 38 are fixedly installed on the outside. During the degradation detection process, the driving component is set. After the rotating shaft 10 rotates, the small turntable 32, the large turntable 33 and the turntable belt 34 can drive the rotating shaft 30 to rotate. The set liquid stirring component can drive the multiple bottom flip leak plates 31 to rotate by rotation, and the liquid at the bottom can be stirred, so that the heated heat can be evenly spread. At the same time, under the action of the rotating wheel 36 and the stirring belt 37, the liquid in the side cavity 5 and the bottom cavity 4 of the box is stirred and mixed, and the heat after the bottom heating can be evenly transferred to the side cavity 5, so that the liquid temperature changes little.

[0046] As a technical optimization solution of the present invention, a fixing ring 43 is fixedly installed on the bottom end of the moving block 19 on the extrusion component, and a plurality of telescopic frames 44 are fixedly installed on the inner wall of the fixing ring 43. A moving rod 45 is movably installed on the plurality of telescopic frames 44. The end of the moving rod 45 is connected to a pressure sensor 46, and one side of the pressure sensor 46 is connected to an arc-shaped extrusion plate 47. A limiting clamping ring 48 is fixedly installed on one side of the fixing ring 43, and a rotating ring 49 is rotatably installed in the limiting clamping ring 48. A rotating gear ring 50 is fixedly installed on one side of the rotating ring 49. A waterproof motor 51 is fixedly installed on one side of the moving block 19, and the output end of the waterproof motor 51 is connected to a rotating gear 52, which meshes with the rotating gear ring 50. A plurality of arc-shaped adjustment holes 53 are opened on one side of the rotating ring 49. An adjusting column 54 is fixedly installed on one side of the plurality of moving rods 45, and one end of the plurality of adjusting columns 54 extends into the plurality of arc-shaped adjustment holes 53 respectively. When the magnesium alloy bracket 22 moves back and forth, it can drive the rotating gear to rotate by the operation of the waterproof motor 51. The wheel 52 rotates, and under the action of the rotating gear ring 50, the rotating ring 49 is driven to rotate. The provided limit collar 48 can limit the rotation of the rotating ring 49. After the rotating ring 49 rotates, the arc-shaped adjustment hole 53 and the adjustment column 54 can drive the movable rod 45 to move. This movement can drive the multiple arc-shaped extrusion plates 47 to approach the magnesium alloy stent 22, thereby squeezing the magnesium alloy stent 22. Through repeated compression and recovery, the magnesium alloy stent 22 can be fatigue tested to simulate the squeezing effect of the magnesium alloy stent 22 on the inner wall of the human blood vessel caused by vascular contraction. The pressure sensor 46 is provided. During the squeezing process, the squeezing force is measured by the pressure sensor 46 and controlled by the control device. Once the set pressure is reached, the squeezing is stopped. The pressure value is generally set in the range of 0-50N, which is more in line with the squeezing strength of the magnesium alloy stent 22 by the internal blood vessels of the human body. Alternatively, the pressure sensor can be omitted and the absolute value of the stroke can be used to control the squeezing stroke, with a stroke range of 0-100mm.

[0047] Furthermore, in the above scheme, referring to Figure 10 , set a set of fatigue extrusion tests for the straight magnesium alloy stent 22. When testing the curved magnesium alloy stent 22, multiple sets of the above fatigue extrusion tests can be set to adapt to the testing of the bent magnesium alloy stent 22. It can also match the curvature of the human body's internal blood vessels and has a wider adaptability.

[0048] A method for detecting degradation of a magnesium alloy material, the method comprising:

[0049] Step 1: When performing degradation testing on the magnesium alloy stent 22, the magnesium alloy stent 22 to be degraded is placed on the placement ring 21 and placed in the degradation testing box 2. The box cover 3 is closed to perform a simulated test. During the test, the drive motor 9 is started to run, driving the rotating shaft 10 to rotate. The movable assembly is provided, and after the rotating screw 11 on the movable assembly rotates, it drives the screw slider 12 to move. The drive motor 9 is a forward and reverse motor, which can drive the screw slider 12 to move back and forth. During the back and forth movement, it can drive the magnesium alloy stent 22 below to move back and forth. By moving back and forth, the relative flow of the stent and the blood in the human body can be simulated, so that the magnesium alloy stent 22 and the liquid are moved relative to each other. Compared with the static liquid degradation, the accuracy is higher.

[0050] Step 2: During degradation testing, a constant temperature heating assembly is provided, which is controlled by the control panel 7 to control the heating rod 6 to perform constant temperature heating. After heating, the liquid in the bottom chamber 4 and the side chamber 5 of the box will be heated. Through heating, a constant temperature effect can be achieved. Through heat transfer, the temperature in the degradation testing box 2 is also constant, thereby simulating the temperature in the human body, making the degradation data of the magnesium alloy stent 22 more accurate.

[0051] Step 3: During the degradation detection process, the driving assembly is provided. After the rotating shaft 10 rotates, the small rotating wheel 32, the large rotating wheel 33 and the rotating wheel belt 34 can drive the rotating shaft 30 to rotate. The provided liquid stirring assembly can drive the multiple bottom flip leaking plates 31 to rotate by rotating, and the liquid at the bottom can be stirred, so that the heated heat can be evenly distributed. At the same time, under the action of the rotating wheel 36 and the stirring belt 37, the liquid in the side cavity 5 and the bottom cavity 4 of the box is stirred and mixed. The heat heated at the bottom can be evenly transferred to the side cavity 5, so that the temperature change of the liquid is small.

[0052] Step 4: When the magnesium alloy bracket 22 is moving, the movement of the moving block 19 drives the guide column 28 to rotate. One end of the guide column 28 moves in the arc-shaped guide groove 26, and the movement can drive the moving block 19 to move up and down, with a certain vibration, thereby simulating the movement of the human body. The moving block 19 can move in the moving groove 18 and reset the spring 20 to achieve the movement adjustment of the moving block 19. By simulating the movement of the human body, the degradation of the magnesium alloy bracket 22 can be more suitable for the use situation;

[0053] Step 5: When the magnesium alloy stent 22 is moving, the extrusion component is provided to simulate the extrusion of the magnesium alloy stent 22 by blood vessels in the human body through the extrusion of the extrusion component, and perform an extrusion fatigue test.

[0054] Example 2:

[0055] Please refer to Figure 11、 Figure 12 and Figure 13 The difference between this embodiment and the above embodiment is that: a mounting ring 55 is fixedly installed on the bottom end of the moving block 19, an airbag cover 56 is fixedly installed on the inner wall of the mounting ring 55, and the airbag cover 56 is arranged at the upper half ring position of the mounting ring 55, a plurality of push rods 57 are fixedly installed on the side of the airbag cover 56, and the end of the push rod 57 is connected to a push pressure plate 58, and one side of the airbag cover 56 is connected to an airbag tube 62, and an outer half ring 59 is fixedly installed on the side of the mounting ring 55, and a plurality of driving holes 61 are opened on one side of the outer half ring 59, and a plurality of driving columns 60 are fixedly installed on one side of the plurality of pushing rods 57, and one end of the plurality of driving columns 60 are respectively movably installed in the plurality of driving holes 61, and a plurality of device blocks 63 are fixedly installed on the inner wall of the mounting ring 55, and the plurality of device blocks 63 are arranged at the lower half ring position of the mounting ring 55, and the ends of the plurality of device blocks 63 are each provided with a compression groove 64, and the compression groove 64 A compression rod 65 is movably installed on the upper portion, and a bottom pressure plate 67 is fixedly installed on the end portion of the compression rod 65. A compression spring 66 is fixedly installed on the end portion of the compression rod 65 and the side wall of the compression groove 64. During the degradation test of the magnesium alloy bracket 22, the airbag tube 62 is connected to an external air pump, and the airbag sleeve 56 is inflated and deflated by the air pump. After the airbag sleeve 56 is inflated, the push rod 57 can be driven to move. The driving hole 61 and the driving column 60 provided can limit the position of the movement of the push rod 57, and can drive multiple push pressure plates 58 to uniformly squeeze the magnesium alloy bracket 22 from different directions. At the same time, multiple bottom pressure plates 67 are provided on the lower semicircular part, and the end portion of the bottom pressure plate 67 is connected to a compression spring 66. The compression spring 66 provided at the bottom cooperates with the inflation and extrusion of the upper portion to achieve fatigue testing of the magnesium alloy bracket 22.

[0056] Example 3:

[0057] Please refer to Figure 7 and Figure 10 The difference between this embodiment and the second and third embodiments is that the arc-shaped extrusion plate 47, the pushing plate 58 and the bottom plate 67 are set to an L-shaped structure or a U-shaped structure to solve the problems of magnesium alloy brackets 22 of different types or shapes.

[0058] During use: When performing degradation detection on the magnesium alloy bracket 22, the magnesium alloy bracket 22 to be degraded is placed on the placement ring 21 and placed in the degradation detection box 2, and the box cover 3 is closed to perform a simulated test. During the test, the drive motor 9 is started to run, driving the rotating shaft 10 to rotate, and the moving component is set. After the rotating screw 11 on the moving component rotates, it will drive the screw slider 12 to move. The drive motor 9 is a forward and reverse motor, which can drive the screw slider 12 to move back and forth. In the process of moving back and forth, it can drive the magnesium alloy bracket 22 below to move back and forth. By moving back and forth, the relative flow of the bracket and the blood in the human body can be simulated, so that the magnesium alloy bracket 22 and the liquid can move relative to each other. Compared with static liquid degradation, it has higher accuracy. During degradation detection, a constant temperature heating component is set, which can control the heating rod 6 to perform constant temperature heating through the control panel 7. After heating, the liquid in the bottom cavity 4 and the side cavity 5 of the box will be heated. By heating, a constant temperature effect can be achieved. Through heat transfer, the temperature in the degradation detection box 2 is also constant, thereby simulating the temperature in the human body, making the degradation data of the magnesium alloy bracket 22 more accurate. During the degradation detection process, a driving component is set. After the rotating shaft 10 rotates, under the action of the small wheel 32, the large wheel 33 and the wheel belt 34, the rotating shaft 30 can be driven to rotate. The liquid stirring component is set, which can drive multiple bottoms to flip through rotation. The leak plate 31 rotates, and the liquid at the bottom can be stirred, so that the heat after heating can be evenly spread. At the same time, under the action of the rotating wheel 36 and the stirring belt 37, the liquid in the side cavity 5 and the bottom cavity 4 of the box are stirred and mixed, and the heat after bottom heating can be evenly transferred to the side cavity 5, so that the temperature change of the liquid is small. When the magnesium alloy bracket 22 moves, the movement of the moving block 19 will drive the guide column 28 to rotate. One end of the guide column 28 moves in the arc-shaped guide groove 26, and the movement can drive the moving block 19 to move up and down, with a certain vibration, thereby simulating the movement of the human body. The moving block 19 can move in the moving groove 18, and the reset spring 20 can realize the moving block 19 Mobility adjustment simulates the movement of the human body, so that the degradation of the magnesium alloy bracket 22 is more in line with the usage conditions. A threaded sleeve 29 is provided, and one end of the guide column 28 is a threaded end, which can realize threaded connection. The inlet and outlet openings 27 are provided, and the inlet and outlet openings 27 have a wide range, which can facilitate the free entry of the guide column 28. After the guide column 28 goes out from the inlet and outlet openings 27, the positioning bolt 16 is rotated to open the swing block 15, and the swing block 15 rotates on the swing shaft 14, so that the bottom connecting block 17 can be rotated. After flipping, the magnesium alloy bracket 22 can be taken out. The extrusion component provided can simulate the extrusion of the magnesium alloy bracket 22 by the blood vessels inside the human body through the extrusion of the extrusion component, and conduct an extrusion fatigue test. It is easy to use.

[0059] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A degradation detection device for magnesium alloy materials, comprising a degradation external box (1), characterized in that: A degradation detection box (2) is installed on the degradation external box (1), the bottom side of the degradation detection box (2) is located in the degradation external box (1), a box bottom cavity (4) is opened on the degradation external box (1), a side cavity (5) is opened on the top inner wall of the box bottom cavity (4), a constant temperature heating component is provided in the box bottom cavity (4), a mounting plate (8) is fixedly installed on one side of the degradation external box (1), a driving motor (9) is fixedly installed on one side of the mounting plate (8), an output end of the driving motor (9) is connected to a rotating shaft (10), one end of the rotating shaft (10) extends into the degradation detection box (2), and a mounting block (13) is installed through a moving component. ), a bottom connecting block (17) is installed on one side of the mounting block (13) through a flip assembly, a moving block (19) is movably installed on the bottom side of the bottom connecting block (17), a placement ring (21) is provided on the bottom side of the moving block (19), a magnesium alloy stent (22) is placed on the placement ring (21), an extrusion component is provided at the bottom of the moving block (19), and the extrusion component is used to simulate the extrusion of the magnesium alloy stent (22) by the blood vessel, the moving block (19) is connected to the degradation detection box (2) through a variable adjustment component, a rotating shaft (30) is rotatably installed on the degradation external box (1), and the rotating shaft (10) drives the component and The degradation detection box (2) is connected to the external degradation box (1) by a rotating shaft (30), and a liquid stirring component is installed on the rotating shaft (30). An observation hole (39) is provided on one side of the degradation detection box (2). The degradation detection box (2) is made of transparent glass. A box cover (3) is installed on the top side of the degradation detection box (2). An ion concentration detector (40), a pH detector (41) and a temperature sensor (42) are provided on one side of the degradation detection box (1). The ion concentration detector (40), the pH detector (41) and the temperature sensor (42) are all extended into the degradation detection box (2). The change adjustment component includes a side block (25) fixedly installed on the inner wall of the degradation detection box (2). An arc-shaped guide groove (26) is provided on one side of the side block (25), and an inlet and outlet opening (27) is provided on one side of the arc-shaped guide groove (26). Threaded sleeves (29) are fixedly installed on both sides of the moving block (19), and guide posts (28) are threadedly installed on the two threaded sleeves (29). The two guide posts (28) are movably installed in the two arc-shaped guide grooves (26). A moving groove (18) is provided on the bottom side of the bottom connecting block (17). The top side of the moving block (19) extends into the moving groove (18) and is fixedly installed with one end of a return spring (20). The other end of the return spring (20) is fixedly installed on the top inner wall of the moving groove (18).

2. A degradation detection device for magnesium alloy materials according to claim 1, characterized in that: The extrusion component comprises a fixed ring (43) fixedly mounted on the bottom end of the moving block (19), a plurality of telescopic frames (44) fixedly mounted on the inner wall of the fixed ring (43), a moving rod (45) movably mounted on each of the plurality of telescopic frames (44), an end of the moving rod (45) connected to a pressure sensor (46), one side of the pressure sensor (46) connected to an arc-shaped extrusion plate (47), a limiting clamping ring (48) fixedly mounted on one side of the fixed ring (43), a rotating ring (49) rotatably mounted inside the limiting clamping ring (48) A rotating gear ring (50) is fixedly installed on one side of the rotating ring (49), a waterproof motor (51) is fixedly installed on one side of the moving block (19), an output end of the waterproof motor (51) is connected to a rotating gear (52), the rotating gear (52) is meshed with the rotating gear ring (50), a plurality of arc-shaped adjustment holes (53) are opened on one side of the rotating ring (49), and an adjustment column (54) is fixedly installed on one side of the plurality of moving rods (45), and one end of the plurality of adjustment columns (54) respectively extends into the plurality of arc-shaped adjustment holes (53).

3. The degradation detection device for magnesium alloy materials according to claim 1, characterized in that: The extrusion component includes a mounting ring (55) fixedly mounted on the bottom end of the moving block (19), an airbag cover (56) fixedly mounted on the inner wall of the mounting ring (55), the airbag cover (56) being arranged at the upper half ring position of the mounting ring (55), a plurality of push rods (57) fixedly mounted on the side of the airbag cover (56), the end of the push rod (57) being connected to a push pressure plate (58), one side of the airbag cover (56) being connected to an airbag tube (62), an outer half ring (59) fixedly mounted on the side of the mounting ring (55), a plurality of driving holes (61) being opened on one side of the outer half ring (59), and a plurality of push rods ( A driving column (60) is fixedly installed on one side of the mounting ring (57), and one end of each of the driving columns (60) is movably installed in each of the driving holes (61). A plurality of equipment blocks (63) are fixedly installed on the inner wall of the mounting ring (55), and the plurality of equipment blocks (63) are arranged at the lower half ring position of the mounting ring (55). The ends of the plurality of equipment blocks (63) are provided with compression grooves (64), and a compression rod (65) is movably installed on the compression groove (64). A bottom pressure plate (67) is fixedly installed on the end of the compression rod (65), and a compression spring (66) is fixedly installed between the end of the compression rod (65) and the side wall of the compression groove (64).

4. The degradation detection device for magnesium alloy materials according to claim 3, characterized in that: The pushing plate (58) and the bottom plate (67) are L-shaped or U-shaped structures, and the extrusion component uses a pressure sensor or a stroke control method to control the extrusion force.

5. The degradation detection device for magnesium alloy materials according to claim 1, characterized in that: The constant temperature heating component comprises a heating rod (6) mounted on the inner wall of the box bottom cavity (4), and a control panel (7) is fixedly mounted on one side of the degradation external box (1).

6. The degradation detection device for magnesium alloy materials according to claim 1, characterized in that: The moving assembly comprises a rotating screw (11) fixedly mounted on one end of a rotating shaft (10), a screw slider (12) being threadedly sleeved on the rotating screw (11), a bottom side of the screw slider (12) being fixedly connected to a top side of a mounting block (13), a guide column (23) being fixedly mounted on an inner wall of the degradation detection box (2), a guide block (24) being fixedly mounted on one side of the screw slider (12), and the guide block (24) being movably sleeved on the guide column (23).

7. The degradation detection device for magnesium alloy materials according to claim 1, characterized in that: The flip assembly comprises a swing shaft (14) fixedly mounted on one side of the mounting block (13); a swing block (15) is rotatably mounted on the swing shaft (14); a positioning bolt (16) is threadedly mounted on one side of the swing block (15); one end of the positioning bolt (16) is threadedly mounted on the mounting block (13); and the bottom side of the swing block (15) is fixedly connected to the top side of the bottom connecting block (17).

8. The degradation detection device for magnesium alloy materials according to claim 1, characterized in that: The driving assembly includes a small rotating wheel (32) fixedly sleeved on the rotating shaft (10), one end of the rotating shaft (30) extends to the outside of the degradation external box (1) and is fixedly mounted with a large rotating wheel (33), and the small rotating wheel (32) and the large rotating wheel (33) are sleeved with the same rotating wheel belt (34), and the liquid stirring assembly includes a plurality of bottom flipping leakage plates (31) fixedly mounted on the rotating shaft (30), the bottom flipping leakage plates (31) are located in the box bottom cavity (4), a connecting shaft (35) is rotatably mounted on the inner wall of the side cavity (5), a rotating wheel (36) is fixedly sleeved on both the connecting shaft (35) and the rotating shaft (30), a same stirring belt (37) is sleeved on the two rotating wheels (36), and a plurality of driving leakage plates (38) are fixedly mounted on the outer side of the stirring belt (37).

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