CN212904672U - Vortex probe with four-claw structure - Google Patents
Vortex probe with four-claw structure Download PDFInfo
- Publication number
- CN212904672U CN212904672U CN202022215423.9U CN202022215423U CN212904672U CN 212904672 U CN212904672 U CN 212904672U CN 202022215423 U CN202022215423 U CN 202022215423U CN 212904672 U CN212904672 U CN 212904672U
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- probe body
- probe
- eddy current
- mount pad
- flexible gripper
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- 239000000523 sample Substances 0.000 title claims abstract description 57
- 238000001514 detection method Methods 0.000 claims description 35
- 238000007689 inspection Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 210000000078 claw Anatomy 0.000 description 6
- 230000005284 excitation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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Abstract
The utility model discloses an eddy current probe of four-jaw structure, including the probe body, the telescopic link, mount pad and four flexible gripper, wherein, the probe body is fixed in on the mount pad, be provided with a plurality of rectangular holes along circumference in the mount pad, all be provided with the magnetic force piece in each rectangular hole, the upper end of flexible gripper and the top hinged joint of probe body, the lower extreme of each flexible gripper is located around the mount pad, be connected through the spring between the middle part of flexible gripper and the side of probe body, each flexible gripper distributes along circumference in proper order, the bottom of probe body is provided with the connection boss, the end connection of telescopic link is on the connection boss, this probe can be fixed in the hydraulic turbine of undulation and overflows the part surface, do not receive the influence that overflows the part undulation simultaneously.
Description
Technical Field
The utility model belongs to the eddy current testing field relates to an eddy current probe of four-jaw structure.
Background
The abrasion damage of the water turbine is one of the major problems to be solved urgently in the hydroelectric power generation industry. Due to the dual functions of cavitation and silt impact, flow passage components such as guide vanes and rotating wheels of the water turbine are often damaged, and the unit generates strong vibration, noise and load fluctuation in severe cases, so that the safety stability and service life of the water turbine are directly influenced. At the same time, the turbine is expensive to maintain and repair. Taking a 225KW unit as an example, the overhaul time usually lasts 110 days, and the maintenance cost plus the direct economic loss caused by stopping power generation exceeds one hundred million yuan. Therefore, it is important to detect the overcurrent component in time.
In the detection of the flow passage component of the water turbine, eddy current inspection is an effective nondestructive detection means. In the damage detection process of the overcurrent component, the plane crack detection of the overcurrent component is an important part. However, the following problems exist in the detection process of the plane crack of the overcurrent component: the water turbine flow passage component is a complex structure, and the problem of how to fix the probe on the surface of the fluctuant water turbine flow passage component is a difficult problem in the industry just above the head of a person during shutdown detection.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a vortex probe of four-jaw structure, this probe can be fixed in the hydraulic turbine of fluctuation and overflows the part surface, does not receive the influence that overflows the part fluctuation simultaneously.
In order to achieve the purpose, the eddy current probe of four-jaw structure include probe body, the telescopic link, mount pad and four flexible gripper, wherein, the probe body is fixed in on the mount pad, be provided with a plurality of rectangular holes along circumference in the mount pad, all be provided with the magnetic force piece in each rectangular hole, the upper end of flexible gripper and the top hinged joint of probe body, the lower extreme of each flexible gripper is located around the mount pad, be connected through the spring between the middle part of flexible gripper and the side of probe body, each flexible gripper distributes along circumference in proper order, the bottom of probe body is provided with the connection boss, the end connection of telescopic link is on the connection boss.
The lower end of the telescopic mechanical claw is of a spherical structure.
Eight groups of detection coils are fixed in the probe body, wherein the eight groups of detection coils are arranged in a delta-shaped array.
The upper end of the telescopic mechanical claw is provided with a hinge joint, and the top of the probe body is provided with a hinge interface matched with the hinge joint.
The side of the probe body is provided with a spring connecting joint for connecting a spring.
The connecting lug boss is connected with the telescopic rod through a bolt.
When detecting, the distance between the detection coil and the workpiece is 2 mm.
The utility model discloses following beneficial effect has:
vortex probe of four-jaw structure when concrete operation, be provided with four flexible gripper on the probe body, on the probe body was fixed in the mount pad simultaneously, be provided with the magnetic force piece in the mount pad, the probe body was through four flexible gripper self-leveling, fixed by oneself through built-in magnetic force piece, the probe can be fixed in the hydraulic turbine of fluctuation and overflows the part surface, does not receive the influence that overflows the part fluctuation simultaneously, whole probe simple structure, convenient to use can carry out the crackle at the hydraulic turbine scene and detect, has good engineering practical value.
Drawings
Fig. 1 is a schematic view of a flow passage component plane eddy current testing device according to the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a structural diagram of the probe body 11 of the present invention;
fig. 4 is a layout diagram of the detection coil 111 in the present invention;
FIG. 5 is a diagram of an eddy current testing process for the flow feature;
fig. 6 is a graph of the sensed impedance of the eddy current of the overcurrent component.
Wherein 11 is a probe body, 12 is a telescopic mechanical claw, 13 is a spring, 111 is a detection coil, 112 is a hinge interface, 113 is a spring connecting joint, 114 is a connecting boss, 115 is a mounting seat, 2 is a telescopic rod, and 3 is an eddy current flaw detector.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
refer to fig. 1, fig. 2 and fig. 3, the eddy current probe of four-jaw structure include probe body 11, telescopic link 2, mount pad 115 and four flexible gripper 12, wherein, probe body 11 is fixed in on mount pad 115, be provided with a plurality of rectangular holes along circumference in the mount pad 115, all be provided with the magnetic force piece in each rectangular hole, the upper end of flexible gripper 12 and the top hinged joint of probe body 11, the lower extreme of each flexible gripper 12 is located around mount pad 115, be connected through spring 13 between the side of the middle part of flexible gripper 12 and probe body 11, each flexible gripper 12 distributes along circumference in proper order, the bottom of probe body 11 is provided with connects boss 114, the end connection of telescopic link 2 is on connecting boss 114.
The lower end of the telescopic mechanical claw 12 is of a spherical structure; the upper end of the telescopic gripper 12 is a hinge joint, and the top of the probe body 11 is provided with a hinge interface 112 matched with the hinge joint.
The side surface of the probe body 11 is provided with a spring connecting joint 113 for connecting the spring 13; the connecting boss 114 is connected with the telescopic rod 2 through a bolt.
The probe body 11 is automatically leveled through four telescopic mechanical claws 12, and is automatically fixed through a built-in magnetic sheet, so that the distance between a detection coil 111 and a workpiece is ensured to be 2mm, the influence of fluctuation of a detection object is avoided, the eddy current detection of the water turbine flow passage component is realized, the whole probe is simple in structure and convenient to use, crack detection can be carried out on the water turbine site, and the probe has good engineering practical value.
The lower end of the telescopic mechanical claw 12 is of a spherical structure, so that the lower end can be automatically leveled on the overflowing component without being influenced by fluctuation of the overflowing component.
Referring to fig. 4, eight groups of detection coils 111 are arranged in a delta-shaped array, interact with each other, and excite each other, and when the a1 detection coil 111 is used as excitation, the a2 detection coil 111 can receive eddy current signals; when the A2 detection coil 111 is used as excitation, the A3 detection coil 111 can receive eddy current signals; by analogy, when the detection coil 111 of A8 is used as excitation, the detection coil 111 of a1 can receive eddy current signals, the eight detection coils 111 interact with each other to complete the detection task, and the detection coil 111 receiving the eddy current signals is connected with the foreign eddy current flaw detector 3.
Referring to fig. 5, the specific detection process of the present invention is: 1) equipment connection, starting, system initialization, setting detection parameters (such as excitation signal frequency, phase and the like); 2) detecting on a standard test block; 3) is the 8-channel array probe signal normal judged? If the system is normal, entering the next step, otherwise, returning to the first step to check the equipment connection and system initialization; 4) transmitting the detection signal, and processing the detection signal by using computer software; 5) and judging whether the detection data has faults or not, if so, alarming and automatically storing the detection data. Otherwise, the alarm is not given, and the detection data can be manually stored; 6) and (5) carrying out real-time monitoring on the overcurrent component, and repeating the steps 3) to 5) until the detection is finished.
Example one
According to the special test piece of hydraulic turbine overcurrent part actual conditions preparation, cut artificial defect on the test piece, the length of defect is 5mm, and the width is 0.17mm, and the degree of depth is 2mm, utilizes the utility model discloses detect the test piece crackle, detect the impedance as shown in figure 6, 8 word ripples appear, can know through this impedance picture, the crackle shows directly perceived, clear, very easy discernment. In fig. 6, the abscissa is the real part of the impedance signal, the ordinate is the imaginary part of the impedance signal, there is no physical unit, and the included angle between the abscissa and the ordinate represents the defect degree.
Claims (7)
1. The utility model provides an eddy current probe of four-jaw structure, a serial communication port, including probe body (11), telescopic link (2), mount pad (115) and four flexible gripper (12), wherein, probe body (11) are fixed in on mount pad (115), be provided with a plurality of rectangular holes along circumference in mount pad (115), all be provided with the magnetic force piece in each rectangular hole, the upper end of flexible gripper (12) and the top hinged joint of probe body (11), the lower extreme of each flexible gripper (12) is located around mount pad (115), be connected through spring (13) between the middle part of flexible gripper (12) and the side of probe body (11), each flexible gripper (12) distribute in proper order along circumference, the bottom of probe body (11) is provided with connects boss (114), the end connection of telescopic link (2) is on connecting boss (114).
2. The eddy current probe with a four-jaw structure according to claim 1, wherein the lower end of the telescopic gripper (12) is of a spherical ball structure.
3. The eddy current probe having a four-jaw structure according to claim 1, wherein eight sets of detection coils (111) are fixed in the probe body (11), wherein the eight sets of detection coils (111) are arranged in a delta-shaped array.
4. The eddy current probe with the four-jaw structure according to claim 1 is characterized in that the upper end of the telescopic mechanical jaw (12) is a hinge joint, and the top of the probe body (11) is provided with a hinge interface (112) matched with the hinge joint.
5. The eddy current probe of a four-jaw structure according to claim 1, characterized in that the side of the probe body (11) is provided with a spring connection joint (113) for connecting a spring (13).
6. The eddy current probe having a four-jaw structure according to claim 1, wherein the connection boss (114) and the telescopic rod (2) are connected by a bolt.
7. The eddy current probe of a four-jaw structure according to claim 1, characterized in that the distance between the detection coil (111) and the workpiece at the time of inspection is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022215423.9U CN212904672U (en) | 2020-09-29 | 2020-09-29 | Vortex probe with four-claw structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022215423.9U CN212904672U (en) | 2020-09-29 | 2020-09-29 | Vortex probe with four-claw structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212904672U true CN212904672U (en) | 2021-04-06 |
Family
ID=75260727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022215423.9U Active CN212904672U (en) | 2020-09-29 | 2020-09-29 | Vortex probe with four-claw structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212904672U (en) |
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2020
- 2020-09-29 CN CN202022215423.9U patent/CN212904672U/en active Active
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