Device and method for detecting internal defects of nodular iron casting
By designing the closing device and limit device of the internal defect detection device of the ball and ink cast iron, the ultrasonic probe probe probe repeated hand -entangled injury problem was solved, and the convenience of cable management and extension of the service life were achieved.
Patent Information
- Application Number
- CN202411551782.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-01-21
AI Technical Summary
In the detection of ductile iron parts, repeated manual winding of the probe wire may cause excessive bending or stretching of the cable, increase the risk of damage, and frequent maintenance and replacement.
The internal defect detection device of the ball ink cast iron is designed, which uses the line -up device and limit device to achieve automatic rollback and length control of the probe line through the spiral spring sheet and a circular shell to avoid manual entanglement.
Effectively manage the length of the cable, prevent excessive stretching or distortions, reduce cable damage, extend the service life, and reduce maintenance and replacement frequency.
Smart Images
Figure CN119335044A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of workpiece internal defect detection, in particular to a ductile iron casting internal defect detection device and a detection method thereof. Background Art
[0002] A variety of nondestructive testing technologies can be used to detect internal defects of ductile iron castings. Ultrasonic flaw detector is a type of internal defect detection device for ductile iron castings. It detects defects inside the material by emitting and receiving ultrasonic waves. It is widely used in the detection of ductile iron castings due to its high sensitivity and accuracy.
[0003] The advantages of ultrasonic flaw detectors in ductile iron casting inspection include non-destructive inspection, high precision, wide application range, easy operation and real-time monitoring. It can detect micron-level defects inside the material and is suitable for internal defect detection of various materials. It also has an intuitive operation interface, which is convenient for operators to conduct inspection and analysis. When the ultrasonic flaw detector probe line is not in use, it is generally fixed with a fixing clip or cable tie or manually wound with the probe line to ensure that it is safely stored to avoid excessive bending or stretching. Although the method of using a fixing clip or cable tie and manually winding the probe line to store the ultrasonic flaw detector probe line provides a certain degree of convenience and protection, it needs to be manually wound or fixed again after each use. If the manual winding is not performed properly, repeated manual winding may cause excessive bending or stretching of the probe line, thereby increasing the risk of cable damage and increasing the frequency of maintenance and replacement; Therefore, in order to solve the above problems, a device and method for detecting internal defects of ductile iron castings are proposed. Summary of the invention
[0004] The object of the present invention is to provide a device and method for detecting internal defects of ductile iron castings, so as to solve the problem mentioned in the above background technology that repeated manual winding may cause excessive bending or stretching of the probe wire, thereby increasing the risk of cable damage and leading to increased maintenance and replacement frequency.
[0005] To achieve the above object, the present invention provides the following technical solutions: A device for detecting internal defects of ductile iron castings and a detection method thereof, comprising an ultrasonic flaw detector, a display screen and an operation panel, wherein one side of the ultrasonic flaw detector is fixedly connected to the display screen, one side of the ultrasonic flaw detector is fixedly connected to the operation panel, the upper end of the ultrasonic flaw detector is fixedly connected to a probe line, the other end of the probe line is fixedly connected to a probe, and one side of the ultrasonic flaw detector is fixedly connected to a wire take-up device; the wire take-up device comprises a mounting plate, the inner side of the mounting plate is spirally connected to a bolt assembly, one side of the mounting plate is fixedly connected to a mounting shell, one end of the mounting shell is spirally connected to a mounting cover, and one side of the mounting shell is fixedly connected to a protective cover. A protective device, the protective device includes a connecting tube, one end of the connecting tube is fixedly connected to a fixed magnetic sheet, the inner side of the connecting tube is fixedly connected to a fixed plate, one side of the fixed plate is fixedly connected to a protective sleeve, the protective sleeve includes a mounting piece, the outer side of the mounting piece is fixedly connected to a telescopic sleeve, the outer side of the telescopic sleeve is fixedly connected to an anti-collision ring; the inner side of the mounting shell is fixedly connected to a fixed shaft, the outer side of the fixed shaft is fixedly connected to a spiral spring sheet, the outer side of the fixed shaft is rotatably connected to a circular shell, one side of the circular shell is fixedly connected to a fixing ring, the outer side of the fixing ring is fixedly connected to a limiting block, and the inner side of the mounting shell is fixedly connected to a limiting device.
[0006] As a further optimized content of the present invention, the limiting device includes a central shaft, a reset spring is fixedly connected to the outer side of the central shaft, the outer ring of the reset spring is fixedly connected to the rotating shaft, a stop block is fixedly connected to the outer side of the rotating shaft, and a connecting plate is fixedly connected to the outer side of the rotating shaft.
[0007] As a further optimization of the present invention, there are a plurality of bolt assemblies, the bolt assemblies are evenly and equidistantly distributed inside the mounting plate, the bolt assemblies are distributed in a circular array, and the bolt assemblies pass through the mounting plate and are fixedly connected to one side of the ultrasonic flaw detector.
[0008] As a further optimization content of the present invention, the probe wire passes through the mounting shell and is wound around the outside of the spiral spring sheet, the outside of the probe wire is installed at both ends of the spiral spring sheet, the probe wire passes through the groove of the circular shell and is wound around the outside, and one end of the probe wire passes through the protective device and is fixedly connected to the probe.
[0009] As a further optimization of the present invention, there are a plurality of limit blocks, the shape of the vertical section of the limit blocks is a triangle, the limit blocks are evenly and equidistantly distributed on the outside of the fixing ring, and the limit blocks are distributed in a circular array.
[0010] As a further optimization of the present invention, the central axis, the rotating shaft and the reset spring are parallel to each other, the center points of the central axis, the rotating shaft and the reset spring are located on the same horizontal line, and the reset spring is arranged between the central axis and the rotating shaft.
[0011] As a further optimization of the present invention, the stopper is arranged between the limit blocks, the vertical section of the stopper is in the shape of a triangle, and the angle between the stopper and the connecting plate is 120°.
[0012] As a further optimization of the present invention, one side of one of the mounting parts is fixedly connected to one side of the probe, a plurality of mounting parts and telescopic sleeves are provided, and the remaining mounting parts are provided between the telescopic sleeves, and the mounting parts and telescopic sleeves are cross-arranged.
[0013] As a further optimization of the present invention, there are several anti-collision rings, all of which are arranged on the outside of the telescopic sleeve, the anti-collision rings are parallel to each other, the shape of the anti-collision rings is ring-shaped, and the anti-collision rings correspond to the telescopic sleeve one by one.
[0014] S1: First, according to the thickness of the ductile iron casting and the characteristics of the expected defects, the parameters of the ultrasonic flaw detector, including sound velocity, gain, K value, etc., are adjusted to ensure that the smallest defects in the workpiece can be detected; S2: Then the probe is stretched outward, and the probe wire will be pulled out when the probe is stretched out. The built-in spiral spring sheet will be stretched by the stretching of the probe wire. The set spiral spring sheet also provides resilience. At the same time, the circular shell around the probe wire will rotate, and drive the fixed ring and the limit block to rotate. When the set limit block rotates, it will squeeze the stopper. When the stopper is squeezed, it will rotate a certain angle to allow the limiter to pass through, and then return to the original position by the elastic force of the reset spring, and repeat this process. S3: When the probe line is released, the built-in spiral spring sheet will contract, and the set limit block will reverse at the same time. The reverse movement will be resisted by the block, so as to limit the position and control the length of the probe line; S4: Apply coupling agent between the probe and the surface of the ductile iron casting to ensure that the ultrasonic wave of the ultrasonic flaw detector can be effectively transmitted from the probe to the workpiece. Use the probe to scan the surface of the ductile iron casting, receive the reflected ultrasonic signal through the probe, and display it on the display screen. According to the test results, the defective ductile iron casting is subsequently processed; S5: When the probe line needs to be stored, the staff needs to use a certain force to rotate the connecting plate clockwise until the block is out of the limit blocks. At this time, the built-in spiral spring sheet will shrink and roll the probe line back. One side of the set probe will fit on the outside of the fixed magnetic sheet, and the connecting plate will be released at the same time, and reset by the reset spring.
[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the cable length can be easily adjusted according to the use requirements through the cable take-up device, making cable management more convenient, avoiding the confusion and inconvenience caused by too long cables, protecting the cables from excessive stretching or twisting, reducing cable damage caused by improper use, extending the service life of the cables, and effectively reducing the maintenance and replacement frequency; 2. In the present invention, the limiting device can ensure that the data cable remains fixed after being stretched to the required length, preventing the length from changing due to movement or pulling during use, which affects data transmission. When the data cable is not needed, it can be locked at a shorter length for easy storage and carrying; 3. In the present invention, the protective cover is provided to effectively isolate external impact, wear and tear and various environmental factors, such as moisture, dust, chemicals, etc., to prevent damage to the probe line, extend the service life of the probe line, reduce the frequency of maintenance and replacement caused by damage, and thus save costs; 4. In the present invention, the anti-collision ring can absorb impact energy, reduce vibration, protect the telescopic sleeve and the probe line inside it from damage caused by external impact or collision, and effectively improve the stability of the telescopic sleeve during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the wire take-up device of the present invention; Figure 3 This is a schematic diagram of the internal structure of the installation shell of the present invention; Figure 4 It is a schematic diagram of the overall structure of the spiral spring sheet of the present invention; Figure 5 This is a schematic diagram of the installation position structure of the circular shell of the present invention; Figure 6 It is a schematic diagram of the overall structure of the limiting device of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the connecting pipe of the present invention; Figure 8 It is a schematic diagram of the overall structure of the protective cover of the present invention.
[0017] In the figure: 1. Ultrasonic flaw detector; 2. Display screen; 3. Operation panel; 4. Probe line; 5. Take-up device; 51. Mounting plate; 52. Bolt assembly; 53. Mounting shell; 54. Mounting cover; 55. Protective device; 551. Connecting pipe; 552. Fixed magnetic sheet; 553. Fixed plate; 554. Protective cover; 5541. Mounting piece; 5542. Telescopic sleeve; 5543. Anti-collision ring; 56. Fixed shaft; 57. Helical spring sheet; 58. Round housing; 59. Limiting device; 591. Central shaft; 592. Rotating shaft; 593. Reset spring; 594. Stopper; 595. Connecting plate; 510. Fixed ring; 511. Limiting block; 6. Probe. DETAILED DESCRIPTION
[0018] See also Figure 1-8 , the present invention provides a technical solution: A device for detecting internal defects of ductile iron castings and a detection method thereof, comprising an ultrasonic flaw detector 1, a display screen 2 and an operation panel 3, wherein the display screen 2 is fixedly connected to one side of the ultrasonic flaw detector 1, the operation panel 3 is fixedly connected to one side of the ultrasonic flaw detector 1, a probe line 4 is fixedly connected to the upper end of the ultrasonic flaw detector 1, a probe 6 is fixedly connected to the other end of the probe line 4, and a wire take-up device 5 is fixedly connected to one side of the ultrasonic flaw detector 1; the wire take-up device 5 comprises a mounting plate 51, a bolt assembly 52 is spirally connected to the inner side of the mounting plate 51, a mounting shell 53 is fixedly connected to one side of the mounting plate 51, a mounting cover 54 is spirally connected to one end of the mounting shell 53, a protective device 55 is fixedly connected to one side of the mounting shell 53, and the protective device 55 comprises a connecting pipe 551 A fixed magnetic sheet 552 is fixedly connected to one end of the connecting tube 551, a fixed plate 553 is fixedly connected to the inner side of the connecting tube 551, a protective cover 554 is fixedly connected to one side of the fixed plate 553, the protective cover 554 includes a mounting member 5541, a telescopic cover 5542 is fixedly connected to the outer side of the mounting member 5541, and an anti-collision ring 5543 is fixedly connected to the outer side of the telescopic cover 5542; a fixed shaft 56 is fixedly connected to the inner side of the mounting shell 53, a spiral spring sheet 57 is fixedly connected to the outer side of the fixed shaft 56, a circular shell 58 is rotatably connected to the outer side of the fixed shaft 56, a fixed ring 510 is fixedly connected to one side of the circular shell 58, a limiting block 511 is fixedly connected to the outer side of the fixing ring 510, and a limiting device 59 is fixedly connected to the inner side of the mounting shell 53.
[0019] The limiting device 59 includes a central axis 591, a reset spring 593 is fixedly connected to the outer side of the central axis 591, a rotating shaft 592 is fixedly connected to the outer ring of the reset spring 593, a stopper 594 is fixedly connected to the outer side of the rotating shaft 592, and a connecting plate 595 is fixedly connected to the outer side of the rotating shaft 592. The setting of the limiting device 59 can ensure that the probe line 4 remains fixed after being stretched to the required length, and prevents the length from changing due to movement or pulling during use, thereby affecting data transmission; a plurality of bolt assemblies 52 are provided, and the bolt assemblies 52 are evenly and equidistantly distributed inside the mounting plate 51, and the bolt assemblies 52 are distributed in a circular array. The bolt assemblies 52 pass through the mounting plate 51 and are fixedly connected to one side of the ultrasonic flaw detector 1. The fixing of the bolt assemblies 52 can improve the stability of the overall structure and ensure that it is maintained under various working conditions. Maintain the original stable state to avoid excessive deformation or damage; the probe line 4 passes through the mounting shell 53 and is wound around the outside of the spiral spring sheet 57, the outside of the probe line 4 is installed at both ends of the spiral spring sheet 57, the probe line 4 passes through the groove of the circular shell 58 and is wound around the outside, and one end of the probe line 4 passes through the protective device 55 and is fixedly connected to the probe 6. Such a setting allows the probe line 4 to be easily retracted after use, avoiding the cables from being messy and facilitating management and carrying; a plurality of limit blocks 511 are provided, and the shape of the vertical section of the limit blocks 511 is triangular. The limit blocks 511 are evenly and equidistantly distributed on the outside of the fixing ring 510, and the limit blocks 511 are distributed in a circular array. The set limit blocks 511 can effectively adjust the required length of the probe line 4, and at the same time can prevent the probe line 4 from automatically rewinding when not needed; The central axis 591, the rotating axis 592 and the return spring 593 are parallel to each other, and the center points of the central axis 591, the rotating axis 592 and the return spring 593 are located on the same horizontal line. The return spring 593 is arranged between the central axis 591 and the rotating axis 592. Such an arrangement can make the overall structure more stable and facilitate the mutual coordination of the structures; the block 594 is arranged between the limit blocks 511, and the vertical cross-section of the block 594 is in the shape of a triangle. The angle formed between the block 594 and the connecting plate 595 is 120°. The set block 594 interacts with the limit block 511, which can effectively prevent the probe line 4 from automatically rewinding; one side of one of the mounting pieces 5541 is fixedly connected to one side of the probe 6, and the mounting piece 5541 and the telescopic sleeve 5542 are both provided with There are several mounting parts 5541, and the remaining mounting parts 5541 are arranged between the telescopic sleeves 5542. The mounting parts 5541 and the telescopic sleeves 5542 are arranged crosswise. The telescopic sleeves 5542 can be extended and retracted at the same time when the probe line 4 is extended and retracted, and can effectively protect the probe line 4 from the influence of environmental factors such as water, dust, coolant, etc., to prevent the probe line 4 from getting damp or the inner core from being oxidized, thereby extending the service life of the probe line 4; there are several anti-collision rings 5543, and the anti-collision rings 5543 are all arranged on the outside of the telescopic sleeves 5542. The anti-collision rings 5543 are parallel to each other, and the shape of the anti-collision rings 5543 is annular. The anti-collision rings 5543 correspond one-to-one with the telescopic sleeves 5542. The anti-collision rings 5543 can protect the internal probe line 4 from being damaged by stretching or twisting.
[0020] First, according to the thickness of the ductile iron part and the characteristics of the expected defects, the parameters of the ultrasonic flaw detector 1, including the sound velocity, gain, K value, etc., are adjusted to adjust the sensitivity of the flaw detector to ensure that the smallest defects in the workpiece can be detected; then the probe 6 is stretched outward, and the probe 6 will pull out the probe line 4, and the built-in spiral spring sheet 57 will be stretched by the stretching of the probe line 4. The set spiral spring sheet 57 also provides a rebound force. At the same time, the circular shell 58 surrounded by the probe line 4 will rotate, and drive the fixed ring 510 and the limit block 511 to rotate. When the set limit block 511 rotates, it will squeeze the stop block 594. When the stop block 594 is squeezed, it will rotate a certain angle, allowing The limit block 511 passes through, and then returns to the original position by the elastic force of the reset spring 593, and repeats this process; when the probe line 4 is released, the built-in spiral spring sheet 57 will shrink, and the set limit block 511 will reverse at the same time, and will be resisted by the stop block 594 while reversing, so as to limit the position and control the length of the probe line 4; a coupling agent is applied between the probe 6 and the surface of the ductile iron part to ensure that the ultrasonic wave of the ultrasonic flaw detector 1 can be effectively transmitted from the probe 6 to the workpiece, and the probe 6 is used to scan the surface of the ductile iron part, and the reflected ultrasonic signal is received by the probe 6 and displayed on the display screen 2, and the defective ductile iron part is subsequently processed according to the detection result; When the probe line 4 needs to be stored, the staff needs to use a certain force to rotate the connecting plate 595 clockwise until the block 594 is out of the limit block 511. At this time, the built-in spiral spring sheet 57 will shrink and roll the probe line 4 back. One side of the set probe 6 will fit against the outside of the fixed magnetic sheet 552, and at the same time release the connecting plate 595 and reset it through the reset spring 593.
[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.
Claims
1. A device for detecting internal defects of ductile iron castings, comprising an ultrasonic flaw detector (1), a display screen (2) and an operation panel (3), characterized in that: A display screen (2) is fixedly connected to one side of the ultrasonic flaw detector (1), an operation panel (3) is fixedly connected to one side of the ultrasonic flaw detector (1), a probe line (4) is fixedly connected to the upper end of the ultrasonic flaw detector (1), a probe (6) is fixedly connected to the other end of the probe line (4), and a wire take-up device (5) is fixedly connected to one side of the ultrasonic flaw detector (1); The wire take-up device (5) comprises a mounting plate (51), a bolt assembly (52) is spirally connected to the inner side of the mounting plate (51), a mounting shell (53) is fixedly connected to one side of the mounting plate (51), a mounting cover (54) is spirally connected to one end of the mounting shell (53), a protective device (55) is fixedly connected to one side of the mounting shell (53), the protective device (55) comprises a connecting tube (551), one end of the connecting tube (551) is fixedly connected to a fixed magnetic sheet (552), the inner side of the connecting tube (551) is fixedly connected to a fixing plate (553), one side of the fixing plate (553) is fixedly connected to a protective sleeve (554), the protective sleeve (554) comprises a mounting piece (5541), the outer side of the mounting piece (5541) is fixedly connected to a telescopic sleeve (5542), and the outer side of the telescopic sleeve (5542) is fixedly connected to an anti-collision ring (5543); A fixed shaft (56) is fixedly connected to the inside of the mounting shell (53), a spiral spring sheet (57) is fixedly connected to the outside of the fixed shaft (56), a circular shell (58) is rotatably connected to the outside of the fixed shaft (56), a fixed ring (510) is fixedly connected to one side of the circular shell (58), a limiting block (511) is fixedly connected to the outside of the fixing ring (510), and a limiting device (59) is fixedly connected to the inside of the mounting shell (53).
2. A device for detecting internal defects of ductile iron castings according to claim 1, characterized in that: The limiting device (59) comprises a central shaft (591), a return spring (593) is fixedly connected to the outer side of the central shaft (591), an outer ring of the return spring (593) is fixedly connected to a rotating shaft (592), a stopper (594) is fixedly connected to the outer side of the rotating shaft (592), and a connecting plate (595) is fixedly connected to the outer side of the rotating shaft (592).
3. The device for detecting internal defects of ductile iron castings according to claim 1, characterized in that: A plurality of the bolt assemblies (52) are provided, and the bolt assemblies (52) are evenly and equidistantly distributed inside the mounting plate (51). The bolt assemblies (52) are distributed in a circular array, and the bolt assemblies (52) pass through the mounting plate (51) and are fixedly connected to one side of the ultrasonic flaw detector (1).
4. A device for detecting internal defects of ductile iron castings according to claim 1, characterized in that: The probe wire (4) passes through the mounting shell (53) and is wound around the outside of the spiral spring sheet (57). The outside of the probe wire (4) is mounted on both ends of the spiral spring sheet (57). The probe wire (4) passes through the groove of the circular shell (58) and is wound around the outside. One end of the probe wire (4) passes through the protective device (55) and is fixedly connected to the probe (6).
5. The device for detecting internal defects of ductile iron castings according to claim 1, characterized in that: A plurality of the limit blocks (511) are provided, and the shape of the vertical cross-section of the limit blocks (511) is a triangle. The limit blocks (511) are evenly and equidistantly distributed outside the fixing ring (510), and the limit blocks (511) are distributed in a circular array.
6. A device for detecting internal defects of ductile iron castings according to claims 1 and 2, characterized in that: The central axis (591), the rotating shaft (592), and the return spring (593) are parallel to each other; the center points of the central axis (591), the rotating shaft (592), and the return spring (593) are located on the same horizontal line; and the return spring (593) is arranged between the central axis (591) and the rotating shaft (592).
7. A device for detecting internal defects of ductile iron castings according to claims 1 and 2, characterized in that: The stopper (594) is arranged between the limit blocks (511); the vertical cross-section of the stopper (594) is in the shape of a triangle; and the angle formed between the stopper (594) and the connecting plate (595) is 120°.
8. The device for detecting internal defects of ductile iron castings according to claim 1, characterized in that: One side of one of the mounting parts (5541) is fixedly connected to one side of the probe (6), a plurality of the mounting parts (5541) and the telescopic sleeves (5542) are provided, and the remaining mounting parts (5541) are provided between the telescopic sleeves (5542), and the mounting parts (5541) and the telescopic sleeves (5542) are cross-arranged.
9. The device for detecting internal defects of ductile iron castings according to claim 1, characterized in that: A plurality of anti-collision rings (5543) are provided, and the anti-collision rings (5543) are all provided outside the telescopic sleeve (5542). The anti-collision rings (5543) are parallel to each other, and the shape of the anti-collision rings (5543) is annular. The anti-collision rings (5543) correspond one to one with the telescopic sleeve (5542).
10. A detection method for an internal defect detection device for ductile iron castings according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: First, according to the thickness of the ductile iron casting and the characteristics of the expected defects, the parameters of the ultrasonic flaw detector (1), including the sound velocity, gain, K value, etc., are adjusted to ensure that the smallest defects in the workpiece can be detected; S2: Then the probe (6) is stretched outwards. The probe (6) is stretched outwards to pull out the probe line (4). The internal spiral spring sheet (57) is stretched by the stretching of the probe line (4). The spiral spring sheet (57) provides a rebound force. At the same time, the circular shell (58) around the probe line (4) rotates, driving the fixed ring (510) and the limit block (511) to rotate. When the limit block (511) rotates, it squeezes the stop block (594). When the stop block (594) is squeezed, it rotates to a certain angle to allow the stop block (511) to pass through. Then, the stop block (594) returns to its original position by the elastic force of the return spring (593), and the process is repeated. S3: When the probe line (4) is released, the built-in spiral spring sheet (57) will shrink, and the set limit block (511) will reverse, and will be resisted by the stop block (594) at the same time, so as to limit the length of the probe line (4); S4: Coupling agent is applied between the probe (6) and the surface of the ductile iron casting to ensure that the ultrasonic wave of the ultrasonic flaw detector (1) can be effectively transmitted from the probe (6) to the workpiece. The probe (6) is used to scan the surface of the ductile iron casting. The reflected ultrasonic signal is received by the probe (6) and displayed on the display screen (2). Based on the detection result, the ductile iron casting with defects is subsequently processed. S5: When the probe line (4) needs to be stored, the staff needs to use a certain amount of force to rotate the connecting plate (595) clockwise until the stop block (594) is separated from the limit block (511). At this time, the built-in spiral spring sheet (57) will shrink and rewind the probe line (4). One side of the set probe (6) will be attached to the outside of the fixed magnetic sheet (552), and the connecting plate (595) will be released at the same time, and reset by the reset spring (593).