CN213275443U - Eddy current detection device for inner wall of small-diameter pipe - Google Patents
Eddy current detection device for inner wall of small-diameter pipe Download PDFInfo
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- CN213275443U CN213275443U CN202022420222.2U CN202022420222U CN213275443U CN 213275443 U CN213275443 U CN 213275443U CN 202022420222 U CN202022420222 U CN 202022420222U CN 213275443 U CN213275443 U CN 213275443U
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Abstract
The utility model discloses a small diameter pipe inner wall eddy current testing device belongs to small-bore pipeline inner wall nondestructive test technical field. The driving motor and the control system are arranged in the operating handle, and the probe and the driving motor are respectively connected with the control system; the transmission shaft penetrates through the positioning frustum and the operating handle and is connected with the operating handle through a bearing, one end of the transmission shaft is connected with the probe, and the other end of the transmission shaft is connected with the driving motor; the transmission shaft is provided with a scale mark; a plurality of springs are connected between the positioning frustum and the operating handle; the operating handle is provided with an operating panel, the operating panel is connected with a control system, the control system is connected with a transmission line, and the transmission line is connected with external equipment. The device has the advantages of low cost, convenient carrying, reduced operation time, improved working efficiency and capability of providing a safe, reliable, semi-automatic and stable nondestructive detection method for detecting the defects in the small-caliber pipeline.
Description
Technical Field
The utility model belongs to the technical field of small-bore pipeline inner wall nondestructive test, concretely relates to small-diameter pipe inner wall eddy current testing device.
Background
The multi-channel eddy current detection is that a plurality of eddy current detection coils are specially designed and packaged according to the geometric shape of a detected workpiece, and then detection signals are subjected to time-sharing processing through rapid electronic control and processing, so that the physical continuity of the surface and the near surface of a part is rapidly and effectively detected, and the coverage area of one-time detection scanning is several times that of a single channel.
The small-bore pipeline inner wall is narrow and small because of the bore, and the inner wall can not directly be visualized, and the less pressure bearing of volume is great, easily produces fatigue crack, and current pipeline nondestructive test device, many needles are to large-bore pipeline, and the structure is comparatively complicated, and the operation of being not convenient for can't realize detecting the pipeline inner wall of small-bore.
Disclosure of Invention
In order to solve the defect that exists among the above-mentioned prior art, the utility model aims to provide a small diameter pipe inner wall eddy current testing device can realize rapid and stable's detection to different pipe diameter inner walls in the certain limit, and is small, light in weight, low cost, later maintenance is convenient.
The utility model discloses a following technical scheme realizes:
the utility model discloses a small-diameter pipe inner wall eddy current testing device, which comprises a probe, a transmission shaft, a positioning frustum, a driving motor, an operating handle and a control system; the driving motor and the control system are arranged in the operating handle, and the probe and the driving motor are respectively connected with the control system; the transmission shaft penetrates through the positioning frustum and the operating handle and is connected with the operating handle through a bearing, one end of the transmission shaft is connected with the probe, and the other end of the transmission shaft is connected with the driving motor; the transmission shaft is provided with a scale mark; a plurality of springs are connected between the positioning frustum and the operating handle; the operating handle is provided with an operating panel, the operating panel is connected with a control system, the control system is connected with a transmission line, and the transmission line is connected with external equipment.
Preferably, the probe is a multi-channel bridge differential eddy current probe.
Preferably, the diameter of the probe is 90-95% of the inner diameter of the small-diameter pipeline to be measured.
Preferably, a plurality of springs are evenly distributed between the positioning frustum and the operating handle.
Preferably, the outer surface of the positioning frustum is provided with an anti-slip layer.
Preferably, the operating handle comprises a handle front end cover, a handle body and a handle rear end cover, and two ends of the handle body are respectively detachably connected with the handle front end cover and the handle rear end cover; the front end cover of the handle is in interference fit with the base shaft of the bearing outer ring, and the transmission shaft is in interference fit with the base hole of the bearing inner ring; the driving motor and the control system are arranged inside the handle body; the inner side of the handle rear end cover is provided with a tail plug, the tail plug is connected with the control system, the outer side of the handle rear end cover is connected with a transmission line, and the transmission line is connected with the tail plug.
Further preferably, one end of the handle body close to the handle front end cover is provided with a transparent observation window, and the transparent observation window is detachably connected with the handle body.
Preferably, the control system comprises a multi-channel control circuit and a motor control circuit, the multi-channel control circuit is respectively connected with the transmission line and the probe, and the motor control circuit is respectively connected with the transmission line and the driving motor.
Preferably, the motor control circuit is connected with a power-off memory module.
Preferably, the operation panel comprises a self-locking switch with a lamp button and a motor steering indicator light, and the self-locking switch with the lamp button and the motor steering indicator light are respectively connected with the control system.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a small diameter pipe inner wall eddy current testing device, the location frustum can match the small diameter pipe of certain pipe diameter scope, and the spring between location frustum and the operating handle can play the effect of buffering and balanced stress, and the handheld operating handle's of detector thrust and the elasticity of spring are balanced, guarantees the stability on the probe horizontal direction, utilizes the location frustum and is examined the work piece contact cooperation and guarantee the stability on the vertical direction as the stress point. The scales arranged on the transmission shaft are utilized, and the positions of the defects of the pipe wall can be quickly positioned by combining detection signals. Through control system, can control the collaborative work of driving motor and probe, realize the semi-automatization of minor diameter pipe eddy current testing operation. The device has the advantages of low cost, convenient carrying, reduced operation time, improved working efficiency and capability of providing a safe, reliable, semi-automatic and stable nondestructive detection method for detecting the defects in the small-caliber pipeline.
Furthermore, the diameter of the probe is 90% -95% of the inner diameter of the small-diameter pipeline to be detected, the diameter of the probe is slightly smaller than the inner diameter of the workpiece to be detected, and the detection sensitivity is ensured by the high filling coefficient.
Furthermore, a plurality of springs are uniformly distributed between the positioning frustum and the operating handle, so that the stress is uniform, and the stability of the device is improved.
Furthermore, the outer surface of the positioning frustum is provided with an anti-skid layer, so that the stability of contact with the pipe orifice can be improved, the displacement caused by sliding during detection is prevented, and the detection precision is improved.
Furthermore, the operating handle adopts a split structure, so that the daily overhaul and maintenance are facilitated; the tail plug is respectively connected with the control system and the transmission line, so that the device is reliable and stable and is convenient to maintain.
Furthermore, the handle body is close to the transparent observation window arranged at one end of the handle front end cover, the working states of the internal circuit and the driving motor can be visually observed, and the detachable structure can be used for regularly overhauling and maintaining the internal circuit state and the driving motor state of the handle front end.
Furthermore, the motor control circuit is connected with a power-off memory module, if the probe does not complete a rotation period when the power supply is turned off, and the probe enters the next rotation period after the probe continues to complete the rotation action of the period from the last stop position when the power supply is turned on again, the detection efficiency of the device can be improved.
Furthermore, the self-locking switch with the lamp button can provide a remarkable mark in an environment with poor light, and meanwhile, detection personnel are prevented from being touched by mistake; the motor steering indicating lamp can indicate the current motor steering.
Drawings
Fig. 1 is a schematic view of the overall structure of the eddy current testing apparatus for the inner wall of a small-diameter pipe according to the present invention;
fig. 2 is a schematic perspective view of the eddy current inspection device for the inner wall of a small-diameter pipe according to the present invention.
In the figure: 1-sensor mounting hole, 2-first fixing bolt, 3-probe, 4-positioning hole, 5-transmission shaft, 6-positioning frustum, 7-spring, 8-handle front end cover, 9-wire passing hole, 10-second fixing bolt, 11-driving motor, 12-transparent observation window, 13-third fixing bolt, 14-motor steering indicator lamp, 15-handle body, 16-button self-locking switch with lamp, 17-multichannel control circuit, 18-motor control circuit, 19-tail plug, 20-handle rear end cover and 21-transmission line.
Detailed Description
The invention will be described in further detail with reference to the following drawings and specific examples, which are intended to illustrate and not to limit the invention:
referring to fig. 1 and 2, the eddy current testing apparatus for inner wall of small-diameter pipe of the present invention mainly includes a probe 3, a transmission shaft 5, a positioning frustum 6, a driving motor 11, an operating handle and a control system.
Four countersunk head screw holes of angular distribution on the 3 other end circumferencial direction of probe, transmission shaft 5 adopts hollow structure, four screw holes of angular distribution on the 5 one end circumferencial direction of transmission shaft, it is fixed with probe 3 uses four first fixing bolt 2, the 5 other ends of transmission shaft are the concave station structure, cross line hole 9 has been seted up simultaneously, driving motor 11 one end bottom surface is hugged closely to the terminal surface, the inside D type structure that is of 5 concave stations of transmission shaft, with driving motor 11D type output shaft interference fit, and use second fixing bolt 10 fixed. The driving motor 11 drives the transmission shaft 5 to rotate, and the transmission shaft 5 drives the probe 3 to rotate. When the inner wall of the pipeline is detected to be damaged, the damaged condition is analyzed by using the PC end, and the distance from the transmission shaft lever 5 to the workpiece is recorded by combining the scales arranged on the transmission shaft lever 5, so that the damaged condition in the pipeline can be quickly positioned.
The positioning frustum 6 is of a circular boss structure, the front end of the positioning frustum is of a circular platform structure, the diameter of the upper bottom surface of the circular platform is smaller than that of the probe 3, the diameter of the lower bottom surface of the circular platform is larger than that of the probe 3, when detection is carried out, the circular platform part of the probe 3 is close to one side end face of a workpiece, the section of any part of the circular platform is in contact fit with the circumference of the inner wall of the end face of the workpiece, the circumferential contact line serves as a contact stress point, the probe can shake due to suspension during detection in a.
The other end of the positioning frustum 6 is a disc, a spring 7 is fixed between the lower portion of the disc and the front end cover 8 of the handle, the positioning frustum 6, the spring 7 and the front end cover 8 of the handle form a stabilizing device, the operating handle is held by hands during detection, and the physical stability in the horizontal direction is kept through the balance of thrust and elasticity. Preferably, the outer surface of the positioning frustum 6 is provided with an anti-skid layer, which can be made of a high polymer material, or the surface of the positioning frustum 6 can be directly subjected to anti-skid treatment, such as a sand blasting process.
One end of the spring 7 is fixedly connected with the positioning frustum 6, the end is a free end, one end of the spring is connected with the handle front end cover 8, the end is a fixed end, the handle front end cover 8 is of a boss structure, and the boss part of the spring is in interference fit with the concave platform structure at the front end of the handle body 15. A connecting bearing is arranged in the front end cover 8 of the handle, a bearing inner ring is arranged on the transmission shaft 5, the bearing inner ring and the transmission shaft 5 are in interference fit through a base hole, and a bearing outer ring and a base shaft hole of the front end cover 8 of the handle are in interference fit through a base shaft.
The driving motor 11 is a rotary power source of the probe 3 and is fixed inside the operating handle along the axial line of the operating handle.
The front end of the operating handle is designed as a window body, the transparent observation window 12 with a detachable structure is fixed through the third fixing bolt 13, the part can be detached, and the internal circuit state of the front end of the operating handle and the state of the driving motor 11 can be periodically overhauled and maintained.
The handle body 15 is fixed with a lamp button self-locking switch 16 and a motor steering indicator lamp 14 which are 12mm in diameter, the lamp button self-locking switch 16 is internally provided with a pure-color LED, when a power supply is switched on, a peripheral green indicator lamp of the lamp button self-locking switch 16 is in a high-brightness state, the driving motor 11 drives the front-end probe 3 to rotate, the front-end probe 3 outputs a detection signal, the lamp button self-locking switch 16 is pressed again, and the power supply is switched off. The motor steering indicator light 14 has red and blue colors and is used for judging whether the probe rotates clockwise or anticlockwise.
The multi-channel control circuit 17 divides signals transmitted through the signal lines by time as a parameter for signal transmission, so that the signals do not overlap with each other on a time axis, and different signals are transmitted at different times.
The motor control circuit 18 can adjust the rotation time and the interval time of the driving motor 11, and comprises clockwise rotation time t1, stop time t2 and anticlockwise rotation time t3, when the probe 3 rotates clockwise, a red LED lamp of the motor steering indicator lamp 14 is on, a blue LED lamp is off, when the probe 3 rotates anticlockwise, the blue LED lamp is on, the red LED lamp is off, and a detector judges the rotation state of the probe 3 according to the state of the LED lamps. The probe 3 completes one complete cycle or more than one complete cycle of rotation action as a detection cycle, and after one detection cycle is finished, the probe 3 is smoothly pushed forward by a length unit of an effective scanning coverage distance along the axial direction within unit time t2 when the probe 3 stops rotating, and the detection of the next cycle is carried out. Preferably, the motor control circuit 18 is connected to a power-off memory module, and if the probe does not complete a rotation cycle when the power is turned off and the power is turned on again, the probe will continue to complete the rotation of the cycle from the last stop position and then enter the next rotation cycle.
The tail plug 19 is fixed on a handle rear end cover 20, the tail plug 19 is connected with the multi-channel control circuit 17 and the motor control circuit 18 through connecting wires, the handle rear end cover 20 is of a boss structure, the boss part is in interference fit with the boss part at the rear end of the operating handle, and the transmission wire 21 is connected with a peripheral device and outputs collected signals to the peripheral device.
It should be noted that the above description is only a part of the embodiments of the present invention, and equivalent changes made by the system described in the present invention are all included in the protection scope of the present invention. The technical field of the present invention can be replaced by other embodiments described in a similar manner, without departing from the structure of the present invention or exceeding the scope defined by the claims, which belong to the protection scope of the present invention.
Claims (10)
1. A small-diameter tube inner wall eddy current detection device is characterized by comprising a probe (3), a transmission shaft (5), a positioning frustum (6), a driving motor (11), an operating handle and a control system; the driving motor (11) and the control system are arranged in the operating handle, and the probe (3) and the driving motor (11) are respectively connected with the control system; the transmission shaft (5) penetrates through the positioning frustum (6) and the operating handle and is connected with the operating handle through a bearing, one end of the transmission shaft (5) is connected with the probe (3), and the other end of the transmission shaft is connected with the driving motor (11); the transmission shaft (5) is provided with a scale mark; a plurality of springs (7) are connected between the positioning frustum (6) and the operating handle; an operation panel is arranged on the operation handle and connected with a control system, the control system is connected with a transmission line (21), and the transmission line (21) is connected with external equipment.
2. The eddy current inspection device for the inner wall of the small diameter tube according to claim 1, wherein the probe (3) is a multi-channel bridge differential eddy current probe.
3. The eddy current inspection device for the inner wall of the small-diameter pipe according to claim 1, wherein the diameter of the probe (3) is 90% to 95% of the inner diameter of the small-diameter pipe to be inspected.
4. The eddy current inspection device for the inner wall of the small-diameter pipe as claimed in claim 1, wherein a plurality of springs (7) are uniformly distributed between the positioning frustum (6) and the operating handle.
5. The eddy current inspection device for the inner wall of the small-diameter pipe as claimed in claim 1, wherein the outer surface of the positioning frustum (6) is provided with an anti-slip layer.
6. The small-diameter pipe inner wall eddy current testing device according to claim 1, wherein the operating handle comprises a handle front end cover (8), a handle body (15) and a handle rear end cover (20), and two ends of the handle body (15) are respectively detachably connected with the handle front end cover (8) and the handle rear end cover (20); the front end cover (8) of the handle is in interference fit with the base shaft of the bearing outer ring, and the transmission shaft (5) is in interference fit with the base hole of the bearing inner ring; the driving motor (11) and the control system are arranged inside the handle body (15); the inner side of the handle rear end cover (20) is provided with a tail plug (19), the tail plug (19) is connected with a control system, the outer side of the handle rear end cover (20) is connected with a transmission line (21), and the transmission line (21) is connected with the tail plug (19).
7. The eddy current inspection device for the inner wall of the small-diameter pipe according to claim 6, wherein a transparent observation window (12) is arranged at one end of the handle body (15) close to the handle front end cover (8), and the transparent observation window (12) is detachably connected with the handle body (15).
8. The small-diameter pipe inner wall eddy current testing device according to claim 1, wherein the control system comprises a multi-channel control circuit (17) and a motor control circuit (18), the multi-channel control circuit (17) is respectively connected with the transmission line (21) and the probe (3), and the motor control circuit (18) is respectively connected with the transmission line (21) and the driving motor (11).
9. The eddy current inspection device for the inner wall of the small diameter tube according to claim 1, wherein the motor control circuit (18) is connected with a power-off memory module.
10. The eddy current inspection device for the inner wall of the small diameter tube according to claim 1, wherein the operation panel comprises a button-with-lamp self-locking switch (16) and a motor steering indicator lamp (14), and the button-with-lamp self-locking switch (16) and the motor steering indicator lamp (14) are respectively connected with the control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022420222.2U CN213275443U (en) | 2020-10-27 | 2020-10-27 | Eddy current detection device for inner wall of small-diameter pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022420222.2U CN213275443U (en) | 2020-10-27 | 2020-10-27 | Eddy current detection device for inner wall of small-diameter pipe |
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| CN213275443U true CN213275443U (en) | 2021-05-25 |
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| CN202022420222.2U Active CN213275443U (en) | 2020-10-27 | 2020-10-27 | Eddy current detection device for inner wall of small-diameter pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162033A (en) * | 2020-10-27 | 2021-01-01 | 西安热工研究院有限公司 | Small-diameter pipe inner wall nondestructive inspection device and working method thereof |
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2020
- 2020-10-27 CN CN202022420222.2U patent/CN213275443U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162033A (en) * | 2020-10-27 | 2021-01-01 | 西安热工研究院有限公司 | Small-diameter pipe inner wall nondestructive inspection device and working method thereof |
| CN112162033B (en) * | 2020-10-27 | 2024-01-26 | 西安热工研究院有限公司 | Nondestructive inspection device for inner wall of small-diameter pipe and working method thereof |
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