Vortex rotating head
By introducing a limiting component into the eddy current rotary head, and using the limiting rod and limiting hole to limit the spindle, the problem of spindle rotation affecting detection accuracy is solved, and more efficient and accurate material detection is achieved.
Patent Information
- Application Number
- CN202421521006.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-06-28
AI Technical Summary
When adjusting the probe assembly, the rotation of the spindle of the eddy current rotary head causes changes in the detection magnetic field, which affects the accuracy of material detection.
A limiting component is adopted, including a limiting rod and a limiting hole. The limiting rod is inserted into the limiting hole to limit the spindle and prevent the spindle from rotating during the adjustment of the probe assembly. The limiting rod is locked with a locking bolt to improve the limiting effect.
This effectively avoids magnetic field changes caused by spindle rotation, improves the accuracy and efficiency of material testing, and ensures the stability of the probe assembly and the accuracy of signal output.
Smart Images
Figure CN223870600U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of nondestructive testing, and in particular to an eddy current rotating head. Background Technology
[0002] Eddy current rotary heads are essential equipment in the materials non-destructive testing industry, enabling non-destructive testing of materials through probe assemblies. During testing, the distance between the probe assembly and the material surface needs to be adjusted according to the material's outer diameter to meet the requirements of the testing process.
[0003] However, since the probe assembly and the main shaft of the eddy current rotary head are tightly fitted, the main shaft will rotate under the drive of the probe assembly when the probe assembly is adjusted. As a result, the detection magnetic field of the eddy current rotary head will change, affecting the detection accuracy of the eddy current rotary head on materials. Utility Model Content
[0004] In order to overcome the shortcomings of the prior art, this application provides an eddy current rotary head that can limit the spindle when adjusting the probe assembly.
[0005] The eddy current rotary head provided in this application adopts the following technical solution:
[0006] An eddy current rotary head includes a housing, a hollow main shaft rotatable about its own axis and disposed within the housing, a drive assembly for driving the main shaft to rotate, and a probe assembly. The eddy current rotary head also includes a limiting assembly disposed within the housing. The limiting assembly includes a limiting rod movably disposed along a direction close to or away from the main shaft. A limiting hole is formed on the main shaft, and the limiting rod can be inserted into or disengaged from the limiting hole during its active stroke.
[0007] By adopting the above technical solution, when adjusting the probe assembly, the limiting rod can be inserted into the limiting hole and limit the spindle to prevent the spindle from rotating during the adjustment of the probe assembly, thereby avoiding the impact of magnetic field changes on the detection accuracy of the material.
[0008] In one specific implementation, the limiting component further includes a limiting block internally connected to the housing, a limiting groove extending through the limiting block, and a limiting rod movably passing through the limiting groove along its axial direction.
[0009] By adopting the above technical solution, the limiting rod can move stably in the limiting groove, effectively improving the limiting effect of the limiting rod on the spindle.
[0010] In one specific implementation, the limiting block is further provided with a locking groove, the locking groove is connected to the limiting groove, and a locking bolt is threaded into the locking groove, the locking bolt being able to press against the limiting rod or disengage from the limiting rod.
[0011] By adopting the above technical solution, the limiting rod can be locked in the limiting position under the action of the locking bolt, which effectively improves its limiting effect on the spindle.
[0012] In one specific implementation, there are multiple limiting holes, which are arranged circumferentially around the main shaft, and the limiting rod can be inserted into one of the limiting holes during its active stroke.
[0013] By adopting the above technical solution, the limiting rod can limit the spindle at multiple rotational positions, which not only improves work efficiency but also avoids affecting the detection accuracy of materials.
[0014] In one specific implementation scheme, the probe assembly includes a plurality of probes that can be opened or closed relative to each other and are disposed around the spindle. The spindle includes a shaft body and a mounting plate sleeved on the shaft body. The mounting plate has a plurality of mounting slots circumferentially formed thereon. Each mounting slot extends radially along the mounting plate. The plurality of probes are respectively inserted into the plurality of mounting slots.
[0015] By adopting the above technical solution, the motion stability of the probe is effectively improved, and the detection accuracy of the probe for materials is enhanced.
[0016] In one specific implementation, a first limiting ring is fitted onto the mounting plate, and the projections of the plurality of mounting slots onto the first limiting ring are located on the inner ring surface of the first limiting ring.
[0017] By adopting the above technical solution, the first limiting ring can hold the probe in place, preventing the probe from detaching from the main shaft during movement and affecting its detection effect on the material.
[0018] In one specific implementation scheme, the probe assembly further includes an adjustment disk sleeved on the main shaft for driving the movement of the plurality of probes. The adjustment disk is attached to the side of the mounting plate, and multiple arc-shaped adjustment grooves are formed around its circumference on the surface of the adjustment disk. The distance between each adjustment groove and the center of the adjustment disk gradually increases or decreases along its arc-shaped extension direction. The plurality of probes correspond one-to-one with the plurality of adjustment grooves, and each probe is provided with an adjustment part, which is movably inserted into the corresponding adjustment groove.
[0019] By adopting the above technical solution, when the adjustment disk is rotated, multiple probes can move synchronously under the drive of multiple adjustment slots, avoiding adjustment errors between multiple probes and effectively improving the detection accuracy of multiple probes.
[0020] In one specific implementation scheme, a scale is fitted onto the adjustment disk, the scale is provided with scale lines, and the adjustment disk is provided with a pointer for indicating the scale lines.
[0021] By adopting the above technical solution, the adjustment accuracy of the adjustment dial is effectively improved.
[0022] In one specific implementation, the eddy current rotary head further includes a coupling assembly comprising a rotor disk and a stator disk arranged adjacent to each other. The rotor disk is sleeved on the main shaft and electrically connected to the plurality of probes, and the stator disk surrounds the main shaft and is connected to the inner wall of the housing.
[0023] By adopting the above technical solution, the signal detected by the probe can be transmitted to the external flaw detection instrument through the coupling component, which greatly facilitates the subsequent analysis and processing of the detection signal.
[0024] In one specific implementation, the rotor disk is located on the side of the probe assembly and a second limiting ring is fitted thereon, and the limiting hole is opened on the ring surface of the second limiting ring.
[0025] By adopting the above technical solution, the rotation of the rotor disk during the adjustment of the probe assembly is effectively avoided, thereby improving the signal output accuracy of the coupling assembly.
[0026] In summary, this application includes at least one of the following beneficial technical effects:
[0027] When the adjustment disc is rotated, the limiting rod can be inserted into the limiting hole to limit the spindle, thereby preventing the spindle from rotating during the adjustment of the probe assembly and thus avoiding the impact of magnetic field changes on the detection accuracy of the material. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the structure of the eddy current rotating head according to an embodiment of this application.
[0029] Figure 2 This is a partial structural diagram of the eddy current rotary head after removing the housing and drive assembly according to an embodiment of this application.
[0030] Figure 3 yes Figure 2 A schematic diagram of the axial section.
[0031] Figure 4 yes Figure 3A schematic diagram of section AA in the diagram.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1. Housing; 2. Spindle; 21. Shaft body; 22. Mounting plate; 221. Mounting slot; 3. Drive assembly; 4. Probe assembly; 41. Adjusting plate; 411. Adjusting slot; 412. Pointer; 5. Limiting assembly; 51. Limiting rod; 52. Limiting block; 53. Limiting slot; 54. Locking slot; 6. Limiting hole; 7. First limiting ring; 8. Scale plate; 81. Scale line; 9. Coupling assembly; 91. Rotor plate; 92. Stator plate; 10. Second limiting ring; 11. Bearing seat; 12. Bearing; 13. Cover plate. Detailed Implementation
[0034] The present application will be further described in detail below with reference to the accompanying drawings.
[0035] See Figure 1-4 As shown, an eddy current rotary head includes a housing 1, a hollow main shaft 2 rotatable about its own axis and disposed within the housing 1, a drive assembly 3 for driving the rotation of the main shaft 2, and a probe assembly 4. The drive assembly 3 is a motor that drives the main shaft 2 to rotate via a belt. The probe assembly 4 includes multiple probes (not shown) that can be opened or closed relative to each other and disposed around the main shaft 2, and an adjustment disk 41 sleeved on the main shaft 2 for driving the movement of the multiple probes. During testing, material is placed inside the main shaft 2, and the distance between the probes and the material is adjusted using the adjustment disk 41. After adjustment, the motor drives the main shaft 2 to rotate and performs non-destructive testing on the material.
[0036] In this embodiment, as Figure 2-3 As shown, the eddy current rotary head also includes a limiting component 5 disposed in the housing 1. The limiting component 5 is located at one end of the main shaft 2. It includes a limiting block 52 internally connected in the housing 1, a limiting groove 53 through which the limiting block 52 is opened, and a limiting rod 51 threaded through the limiting groove 53. The limiting groove 53 extends along the axial direction of the main shaft 2. A limiting hole 6 is opened on the end face of the main shaft 2 near the limiting block 52. The limiting rod 51 can be inserted into or disengaged from the limiting hole 6 during its active stroke.
[0037] In this way, when the adjustment disk 41 is rotated, the limiting rod 51 can be rotated in advance to make it move relative to the limiting block 52 and be inserted into the limiting hole 6. The limiting rod 51 inserted into the limiting hole 6 can limit the spindle 2 to prevent the spindle 2 from rotating during the rotation of the adjustment disk 41, thereby preventing the detection magnetic field of the eddy current rotating head from changing.
[0038] In this embodiment, the limiting block 52 is also provided with a locking groove 54, which extends radially along the main shaft 2 and communicates with the limiting groove 53. A locking bolt (not shown in the figure) is threaded into the locking groove 54, and the locking bolt can press against the limiting rod 51 or disengage from the limiting rod 51. After the limiting rod 51 is inserted into the limiting hole 6, the locking bolt is tightened, and the limiting rod 51 can be locked in the limiting position under the pressure of the locking bolt, effectively improving its limiting effect on the main shaft 2.
[0039] In this embodiment, combined with Figure 2 As shown, there are multiple limiting holes 6, which are arranged at intervals around the circumference of the main shaft 2. The limiting rod 51 can be inserted into one of the limiting holes 6 during its active stroke. If only one limiting hole 6 is provided on the main shaft 2, the limiting hole 6 may not be within the travel range of the limiting rod 51 after the main shaft 2 stops rotating. In this case, the operator needs to manually rotate the main shaft 2 by a certain angle to match the limiting rod 51. This not only affects work efficiency, but also the rotation of the main shaft 2 will affect the detection accuracy of the material. Therefore, this application provides multiple limiting holes 6, so that the limiting rod 51 can limit the main shaft 2 at multiple rotational positions, which not only improves work efficiency, but also avoids affecting the detection accuracy of the material.
[0040] In this embodiment, combined with Figure 3 As shown, the spindle 2 includes a shaft body 21 and a mounting plate 22 sleeved on the shaft body 21. The mounting plate 22 has multiple mounting grooves 221 circumferentially arranged on it, each extending radially along the mounting plate 22. Multiple probes are respectively inserted into the corresponding mounting grooves 221. A first limiting ring 7 is fitted onto the mounting plate 22, and the projections of the multiple mounting grooves 221 onto the first limiting ring 7 are located on the inner ring surface of the first limiting ring 7. The first limiting ring 7 can hold the probes in place, preventing them from detaching from the spindle 2 during movement and affecting the detection effect on the material.
[0041] In this embodiment, combined with Figure 3-4 As shown, the adjustment plate 41 is attached to the side of the mounting plate 22. Multiple arc-shaped adjustment grooves 411 are formed around the circumference of the adjustment plate 41. The distance between each adjustment groove 411 and the center of the adjustment plate 41 gradually increases or decreases along its arc extension direction. Multiple probes correspond one-to-one with multiple adjustment grooves 411. The probes are provided with adjustment parts (not shown in the figure), and the adjustment parts are movably inserted into the corresponding adjustment grooves 411.
[0042] Combination Figure 2As shown, a scale 8 is fitted onto the adjustment disk 41, and scale lines 81 are provided on the scale 81. The adjustment disk 41 is provided with a pointer 412 for indicating the scale lines 81. When the adjustment disk 41 is rotated, multiple probes can move synchronously under the drive of multiple adjustment slots 411, avoiding adjustment errors between multiple probes and effectively improving the detection accuracy of multiple probes.
[0043] In this embodiment, combined with Figure 3 As shown, the eddy current rotary head also includes a coupling assembly 9 located on the side of the mounting plate 22 away from the adjusting plate 41. The coupling assembly 9 includes a rotor plate 91 and a stator plate 92 arranged adjacent to each other. The rotor plate 91 is sleeved on the main shaft 2 and electrically connected to multiple probes. The stator plate 92 surrounds the main shaft 2 and is connected to the inner wall of the housing 1. The signals detected by the probes can be transmitted to external flaw detection instruments through the coupling assembly 9, greatly facilitating the subsequent analysis and processing of the detection signals.
[0044] A second limiting ring 10 is fitted on the rotor disk 91 located on the side of the adjusting disk 41, and a limiting hole 6 is opened on the annular surface of the second limiting ring 10. By opening the limiting hole 6 on the second limiting ring 10, the limiting rod 51 can simultaneously limit the spindle 2 and the rotor disk 91, effectively preventing the rotor disk 91 from rotating with the adjusting disk 41, and improving the signal output accuracy of the coupling component 9.
[0045] A bearing seat 11 is also connected inside the housing 1. The bearing seat 11 is located on the side of the coupling assembly 9 away from the adjustment plate 41. A bearing 12 is provided in the bearing seat 11, and the main shaft 2 passes through the bearing 12.
[0046] A cover plate 13 that can be opened or closed is provided at one end of the housing 1 near the limiting component 5. When the limiting rod 51 needs to be operated, simply open the cover plate 13.
[0047] The implementation principle of an eddy current rotating head according to an embodiment of this application is as follows:
[0048] The material is placed inside the spindle 2, and then the limiting rod 51 is rotated forward to make it move relative to the limiting block 52 and insert it into the limiting hole 6;
[0049] Rotate the adjustment disc 41 to adjust the distance between the probe and the material. After the adjustment is completed, rotate the limit rod 51 in the opposite direction to reset it.
[0050] The motor drives the spindle 2 to rotate and perform non-destructive testing on the material.
[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An eddy current rotary head, comprising a housing (1), a hollow main shaft (2) rotatable about its own axis and disposed within the housing (1), a drive assembly (3) for driving the main shaft (2) to rotate, and a probe assembly (4), characterized in that: The vortex rotary head also includes a limiting component (5) disposed in the housing (1). The limiting component (5) includes a limiting rod (51) that is movably disposed along the direction close to or away from the main shaft (2). A limiting hole (6) is provided on the main shaft (2). The limiting rod (51) can be inserted into or disengaged from the limiting hole (6) during its active stroke.
2. The eddy current rotating head according to claim 1, characterized in that: The limiting component (5) further includes a limiting block (52) internally connected to the housing (1) and a limiting groove (53) through which the limiting block (52) is opened. The limiting rod (51) is movably inserted into the limiting groove (53) along its axial direction.
3. The eddy current rotating head according to claim 2, characterized in that: The limiting block (52) is also provided with a locking groove (54), which is connected to the limiting groove (53). A locking bolt is threaded into the locking groove (54), and the locking bolt can press against the limiting rod (51) or disengage from the limiting rod (51).
4. The eddy current rotating head according to claim 1, characterized in that: There are multiple limiting holes (6), which are arranged circumferentially around the main shaft (2). The limiting rod (51) can be inserted into one of the limiting holes (6) during its active stroke.
5. The eddy current rotating head according to claim 1, characterized in that: The probe assembly (4) includes a plurality of probes that can be opened or closed relative to each other and are located around the main shaft (2). The main shaft (2) includes a shaft body (21) and a mounting plate (22) sleeved on the shaft body (21). The mounting plate (22) has a plurality of mounting grooves (221) around its own circumference. Each mounting groove (221) extends radially along the mounting plate (22), and the plurality of probes are respectively inserted into the plurality of mounting grooves (221).
6. The eddy current rotating head according to claim 5, characterized in that: The mounting plate (22) is fitted with a first limiting ring (7), and the projection of the plurality of mounting slots (221) on the first limiting ring (7) is located on the inner ring surface of the first limiting ring (7).
7. The eddy current rotating head according to claim 5, characterized in that: The probe assembly (4) also includes an adjustment disk (41) sleeved on the main shaft (2) for driving the movement of the multiple probes. The adjustment disk (41) is attached to the side of the mounting disk (22). Multiple arc-shaped adjustment grooves (411) are opened around the circumference of the adjustment disk (41). The distance between each adjustment groove (411) and the center of the adjustment disk (41) gradually increases or decreases along its arc extension direction. The multiple probes correspond one-to-one with the multiple adjustment grooves (411). Each probe is provided with an adjustment part, which is movably inserted into the corresponding adjustment groove (411).
8. The eddy current rotating head according to claim 7, characterized in that: The adjustment disk (41) is fitted with a scale (8), the scale (8) is provided with scale lines (81), and the adjustment disk (41) is provided with a pointer (412) for indicating the scale lines (81).
9. A vortex rotating head according to claim 1, characterized in that: The eddy current rotary head also includes a coupling assembly (9), which includes a rotor disk (91) and a stator disk (92) arranged adjacent to each other. The rotor disk (91) is sleeved on the main shaft (2) and electrically connected to the probe assembly (4). The stator disk (92) surrounds the main shaft (2) and is connected to the inner wall of the housing (1).
10. A vortex rotating head according to claim 9, characterized in that: The rotor disk (91) is located on the side of the probe assembly (4) and a second limiting ring (10) is sleeved on it. The limiting hole (6) is opened on the ring surface of the second limiting ring (10).