Large-caliber external penetration eddy current flaw detection equipment

Abstract

The utility model relates to large-diameter external-penetrating eddy current flaw detection equipment which comprises a bottom plate, the lifting mechanism comprises a lifting rod slidably arranged on the bottom plate in the vertical direction and an adjusting hand wheel arranged on the lower surface of the bottom plate; the detection mechanism is arranged above the bottom plate, the detection mechanism comprises an external penetration detection probe, and the external penetration detection probe comprises a detection coil; the conveying mechanism comprises a plurality of conveying wheels which are arranged on the side close to the workpiece inlet end of the detection mechanism and the side close to the workpiece outlet end of the detection mechanism respectively, the conveying wheels are rotationally arranged on the upper surface of the bottom plate, and each conveying wheel comprises two circular truncated cone parts which are coaxially connected in an abutting mode; the projections of the end faces, abutting against each other, of the two circular truncated cone parts on the separated end faces of the two circular truncated cone parts completely fall into the separated end faces of the two circular truncated cone parts. According to the utility model, the relative position of the axis of the detected workpiece and the axis of the detection coil can be conveniently adjusted through the lifting mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of eddy current detection, in particular to a large-caliber external eddy current flaw detection device. Background Art

[0002] External eddy current flaw detection is to place the workpiece to be inspected in the detection coil for inspection, which is suitable for outer wall defects of tubes, rods and wires.

[0003] During inspection, the workpiece to be inspected needs to be kept at the center of the detection coil at all times. For workpieces of different diameters, the axis of the workpiece to be inspected and the axis of the detection coil need to be adjusted to the same horizontal plane. The complex adjustment method will greatly increase the difficulty of the inspection work.

[0004] Therefore, it is urgent to propose a large-caliber external eddy current flaw detection device which can conveniently adjust the relative position of the axis of the inspected workpiece and the axis of the detection coil. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a large-caliber external eddy current flaw detection device.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A large-caliber external eddy current flaw detection equipment, comprising

[0008] Base plate;

[0009] A lifting mechanism, the lifting mechanism comprising a lifting rod slidably arranged on the bottom plate in a vertical direction and an adjusting hand wheel arranged on the lower surface of the bottom plate, the lifting rod is vertically lifted and lowered by rotating the adjusting hand wheel;

[0010] A detection mechanism, wherein the detection mechanism is arranged above the bottom plate, the end surface of the lifting rod close to the detection mechanism is fixedly connected to the lower surface of the detection mechanism, the detection mechanism comprises an external penetration detection probe, and the external penetration detection probe comprises a detection coil;

[0011] A conveying mechanism, the conveying mechanism includes a plurality of conveying wheels respectively arranged on a side close to the inlet end of the detection mechanism and a side close to the outlet end of the detection mechanism, the conveying wheels are rotatably arranged on the upper surface of the bottom plate, the rotating axes of the plurality of conveying wheels are arranged in the same horizontal plane, the conveying wheel includes two coaxially abutting frustum parts, the projections of the end faces of the two frustum parts abutting each other on the end faces of the two frustum parts separated respectively completely fall into the end faces of the two frustum parts separated, and the axis of the detection coil is arranged in the end faces of the two frustum parts abutting each other.

[0012] As a further improvement: the conveying mechanism also includes a driving motor, which is arranged on the lower surface of the base plate, and the output end of the driving motor is connected to the rotating shafts of the conveying wheels through a plurality of transmission belts.

[0013] As a further improvement: the lifting mechanism also includes a worm, a worm wheel and a plurality of guide rods, the adjusting hand wheel is coaxially connected to the worm, the worm and the worm wheel are meshed with each other, the worm wheel is coaxially provided with a threaded hole, the lifting rod is a screw, the lifting rod thread is matched with the threaded hole, the guide rod is slidably arranged on the base plate, and the guide rod is fixedly connected to the lower surface of the detection mechanism.

[0014] As a further improvement: the detection mechanism also includes a magnetic saturator, the magnetic saturator includes two coaxially spaced guide sleeves, the guide sleeves include a guide sleeve and a plurality of connecting sleeves coaxially connected to the outside of the guide sleeves, the plurality of connecting sleeves and the guide sleeves and the connecting sleeves are detachably connected by a plurality of bolts, the external penetration detection probe is arranged in the magnetic saturator, and the detection coil is coaxially arranged between the two guide sleeves.

[0015] As a further improvement: it also includes a plurality of upper pressure wheel mechanisms, the upper pressure wheel mechanisms include a cylinder and a roller, the cylinder is fixedly arranged on the upper surface of the base plate, the output rod of the cylinder is vertically arranged and the output end of the output rod is arranged close to the base plate, the roller is slidably connected to the output end, and the rotating axis of the roller is horizontally arranged and perpendicular to the axis of the detection coil.

[0016] As a further improvement: it also includes a control mechanism, which includes a magnetic saturation in place sensor, a controller and a plurality of upper pressure in place sensors, the number and positions of the upper pressure in place sensors correspond to the upper pressing wheel mechanism, the magnetic saturation in place sensor and the plurality of upper pressure in place sensors are arranged at intervals, the connecting line between the magnetic saturation in place sensor and the plurality of upper pressure in place sensors is arranged in the end surfaces of the two frustum parts abutting against each other, the magnetic saturation in place sensor, the plurality of upper pressure in place sensors, the magnetic saturator and the cylinder are electrically connected to the controller respectively.

[0017] As a further improvement: it also includes a marking machine, which is arranged on the upper surface of the bottom plate and is electrically connected to the controller.

[0018] The utility model has the following beneficial effects:

[0019] 1. The parallelism of the workpieces during transport is ensured by setting the rotating axes of the conveying wheels in the same horizontal plane.

[0020] 2. By setting the conveying wheel as two coaxially abutting truncated cones, the projections of the mutually abutting end faces of the two truncated cones on the separated end faces of the two truncated cones completely fall into the separated end faces of the two truncated cones, so that workpieces of different diameters arranged on the conveying wheel are abutted by the inclined surfaces of the two truncated cones at the same time, and the axis of the workpiece is always positioned in the same vertical plane as the axis of the coil to be tested.

[0021] 3. By setting up a lifting mechanism, under the premise that the parallelism of the workpiece is guaranteed and the axis of the workpiece is always in the same vertical plane as the axis of the coil to be tested, the lifting rod can be controlled to move vertically by turning the adjusting hand wheel, and the detection mechanism fixedly connected to the lifting rod is lifted and lowered synchronously, and the axis of the detection coil in the detection mechanism is lifted and lowered synchronously, so that the axis of the detection coil can be easily adjusted to a position where it coincides with the axis of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a structural schematic diagram of the lifting mechanism of the utility model;

[0025] Figure 3 It is a cross-sectional view of the detection mechanism of the utility model;

[0026] Figure 4 for Figure 1 Enlarged view of part A in .

[0027] Reference numerals:

[0028] 1-bottom plate; 2-lifting mechanism; 3-detection mechanism; 4-transportation mechanism; 5-upper pressure wheel mechanism; 6-spraying machine;

[0029] 21-lifting rod; 22-adjusting hand wheel; 23-guide rod;

[0030] 31-external penetration detection probe; 32-magnetic saturator; 33-guide sleeve;

[0031] 331-drainage sleeve; 332-connection sleeve;

[0032] 41- conveying wheel; 42- driving motor;

[0033] 411- truncated cone;

[0034] 51-cylinder; 52-roller. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0036] In the description of the present invention, the terms "upper", "lower", "above", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0038] The following combination Figure 1-4 The utility model is described in further detail.

[0039] Example 1

[0040] Reference Figure 1-4 As shown, this embodiment provides a large-caliber external eddy current flaw detection device, including:

[0041] Bottom plate 1;

[0042] The lifting mechanism 2 includes a lifting rod 21 slidably disposed on the bottom plate 1 in a vertical direction and an adjusting hand wheel 22 disposed on the lower surface of the bottom plate 1. The lifting rod 21 is vertically lifted or lowered by rotating the adjusting hand wheel 22.

[0043] The detection mechanism 3 is arranged above the bottom plate 1, and the end surface of the lifting rod 21 close to the detection mechanism 3 is fixedly connected to the lower surface of the detection mechanism 3. The detection mechanism 3 includes an external penetration detection probe 31, and the external penetration detection probe 31 includes a detection coil;

[0044] The conveying mechanism 4 includes a plurality of conveying wheels 41 respectively arranged on a side close to the inlet end of the detection mechanism 3 and a side close to the outlet end of the detection mechanism 3. The conveying wheels 41 are rotatably arranged on the upper surface of the bottom plate 1. The rotation axes of the plurality of conveying wheels 41 are arranged in the same horizontal plane. The conveying wheel 41 includes two coaxially abutting frustum portions 411. The projections of the end surfaces of the two frustum portions 411 abutting each other on the separated end surfaces of the two frustum portions 411 completely fall into the separated end surfaces of the two frustum portions 411. The axis of the detection coil is arranged in the end surfaces of the two frustum portions 411 abutting each other.

[0045] Specifically, the conveying mechanism 4 further includes a driving motor 42 , which is disposed on the lower surface of the bottom plate 1 , and an output end of the driving motor 42 is connected to the rotating shafts of the conveying wheels 41 through a plurality of transmission belts.

[0046] The output end of the driving motor 42 is connected to the rotating shaft of a conveying wheel 41 through a transmission belt, and the transmission shaft of the conveying wheel 41 is connected to the rotating shafts of other conveying wheels 41 through a plurality of additional transmission belts to reduce the number of driving mechanisms and realize synchronous driving.

[0047] Specifically, the lifting mechanism 2 also includes a worm, a worm wheel and a plurality of guide rods 23. The adjusting hand wheel 22 is coaxially connected to the worm. The worm and the worm wheel are meshed with each other. The worm wheel is coaxially provided with a threaded hole. The lifting rod 21 is a screw rod. The lifting rod 21 thread matches the threaded hole. The guide rod 23 is slidably arranged on the base plate 1. The guide rod 23 is fixedly connected to the lower surface of the detection mechanism 3.

[0048] When the adjusting hand wheel 22 is rotated, the adjusting hand wheel 22 drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the screw matched with the thread to rise and fall, and the screw drives the detection mechanism 3 to rise and fall.

[0049] The guide rod 23 ensures the stability of the detection mechanism 3 during the lifting process.

[0050] In one of the embodiments, the horizontal rotation of the adjusting hand wheel 22 can be converted into vertical rotation by two mutually meshing bevel gears, and then the light rod part of the screw rod is coaxially connected to the vertically rotating bevel gear through a key, and then a nut is arranged on the screw rod, and the nut is fixedly connected to the detection mechanism 3, and the rotation of the screw rod drives the nut to rise and fall, thereby driving the detection mechanism 3 to rise and fall.

[0051] In one of the embodiments, a locking mechanism for locking the worm may be provided.

[0052] In order to facilitate the detection of sub-surface defects of ferromagnetic workpieces, as a further improvement, the detection mechanism 3 also includes a magnetic saturator 32, the magnetic saturator 32 includes two coaxially spaced guide sleeves 33, the guide sleeve 33 includes a guide sleeve 331 and a plurality of connecting sleeves 332 coaxially sleeved on the outside of the guide sleeve 331, the plurality of connecting sleeves 332 and the guide sleeves 331 and the connecting sleeves 332 are detachably connected by a plurality of bolts, the external detection probe 31 is arranged in the magnetic saturator 32, and the detection coil is coaxially arranged between the two guide sleeves 33.

[0053] When eddy current detection is applied to the sub-surface flaw detection of ferromagnetic workpieces, the flaw detection part needs to be saturated magnetized. At this time, a magnetic saturator 32 is needed, and a high magnetic permeability component such as a guide sleeve 33 is needed to guide the magnetic field to the flaw detection part of the inspected workpiece. The several connecting sleeves 332 provided in this embodiment and the guide sleeve 331 and the connecting sleeve 332 are detachably connected by several bolts. When the size of the inspected workpiece changes and the guide sleeve 331 of the corresponding size needs to be replaced, it is sufficient to disassemble the current guide sleeve 331 and the corresponding part of the connecting sleeve 332 without removing the guide sleeve 33 completely, which reduces the difficulty of replacing the guide sleeve 33 and improves work efficiency.

[0054] In order to ensure the parallelism of the inspected workpiece during the transportation process, as a further improvement, it also includes a plurality of upper pressure wheel mechanisms 5, the upper pressure wheel mechanism 5 includes a cylinder 51 and a roller 52, the cylinder 51 is fixedly arranged on the upper surface of the base plate 1, the output rod of the cylinder 51 is vertically arranged and the output end of the output rod is arranged close to the base plate 1, the roller 52 is slidably connected to the output end, and the rotating shaft of the roller 52 is horizontally arranged and perpendicular to the axis of the detection coil.

[0055] By adjusting the stroke of the cylinder 51 , when the inspected workpiece is conveyed to the lower side relative to the cylinder 51 , the roller 52 slightly over-presses the inspected workpiece, thereby ensuring that the inspected workpiece is always in contact with the conveying wheel 41 .

[0056] Example 2

[0057] Reference Figure 1 As shown, in order to realize the automatic control of the utility model, Example 2 proposes an improvement on the basis of Example 1, and also includes a control mechanism, the control mechanism includes a magnetic saturation in place sensor, a controller and a plurality of upper pressure in place sensors, the number and positions of the upper pressure in place sensors correspond to the upper pressure wheel mechanism 5, the magnetic saturation in place sensor and the plurality of upper pressure in place sensors are arranged at intervals, the connection between the magnetic saturation in place sensor and the plurality of upper pressure in place sensors is arranged in the end surfaces of the two frustum parts 411 abutting against each other, the magnetic saturation in place sensor, the plurality of upper pressure in place sensors, the magnetic saturator 32 and the cylinder 51 are electrically connected to the controller respectively.

[0058] When the inspected workpiece passes through each upper pressing position sensor in sequence, each upper pressing position sensor transmits a control signal to the controller in sequence, and the controller controls the corresponding upper pressing wheel mechanism 5 to press downward.

[0059] When the upper pressing wheel mechanism 5 is raised when the upper pressing wheel mechanism 5 senses that the inspected workpiece is not in contact with the inspected workpiece, the upper pressing wheel mechanism 5 is raised.

[0060] The magnetic saturation in place sensor is arranged at a position close to the outlet end of the detection mechanism 3. When the magnetic saturation in place sensor senses the workpiece to be detected, the magnetic saturation is started to magnetize the workpiece to facilitate subsequent detection work.

[0061] In order to facilitate marking of defective parts, as a further improvement, a marking machine 6 is further included. The marking machine 6 is arranged on the upper surface of the bottom plate 1 and is electrically connected to the controller.

[0062] The spray mark is arranged on one side close to the output end of the detection mechanism 3 .

[0063] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A large-caliber external eddy current flaw detection device, comprising a bottom plate, characterized in that: Also includes: A lifting mechanism, the lifting mechanism comprising a lifting rod slidably arranged on the bottom plate in a vertical direction and an adjusting hand wheel arranged on the lower surface of the bottom plate, the lifting rod is vertically lifted and lowered by rotating the adjusting hand wheel; A detection mechanism, wherein the detection mechanism is arranged above the bottom plate, the end surface of the lifting rod close to the detection mechanism is fixedly connected to the lower surface of the detection mechanism, the detection mechanism comprises an external penetration detection probe, and the external penetration detection probe comprises a detection coil; A conveying mechanism, the conveying mechanism includes a plurality of conveying wheels respectively arranged on a side close to the inlet end of the detection mechanism and a side close to the outlet end of the detection mechanism, the conveying wheels are rotatably arranged on the upper surface of the bottom plate, the rotating axes of the plurality of conveying wheels are arranged in the same horizontal plane, the conveying wheel includes two coaxially abutting frustum parts, the projections of the end faces of the two frustum parts abutting each other on the end faces of the two frustum parts separated respectively completely fall into the end faces of the two frustum parts separated, and the axis of the detection coil is arranged in the end faces of the two frustum parts abutting each other.

2. The large-caliber external eddy current flaw detection equipment according to claim 1 is characterized in that: The conveying mechanism further comprises a driving motor, which is arranged on the lower surface of the bottom plate, and the output end of the driving motor is connected to the rotating shafts of the conveying wheels through a plurality of transmission belts.

3. The large-caliber external eddy current flaw detection equipment according to claim 1 is characterized in that: The lifting mechanism also includes a worm, a worm wheel and a plurality of guide rods. The adjusting hand wheel is coaxially connected to the worm. The worm and the worm wheel are meshed with each other. The worm wheel is coaxially provided with a threaded hole. The lifting rod is a screw rod. The lifting rod thread is matched with the threaded hole. The guide rod is slidably arranged on the base plate. The guide rod is fixedly connected to the lower surface of the detection mechanism.

4. The large-caliber external eddy current flaw detection equipment according to claim 1 is characterized in that: The detection mechanism also includes a magnetic saturator, which includes two coaxially spaced guide sleeves, the guide sleeves including a guide sleeve and a plurality of connecting sleeves coaxially connected to the outside of the guide sleeves, the connecting sleeves and the guide sleeves are detachably connected to each other through a plurality of bolts, the external penetration detection probe is arranged in the magnetic saturator, and the detection coil is coaxially arranged between the two guide sleeves.

5. The large-caliber external eddy current flaw detection equipment according to claim 1 is characterized in that: It also includes a plurality of upper pressure wheel mechanisms, which include a cylinder and a roller. The cylinder is fixedly arranged on the upper surface of the base plate, the output rod of the cylinder is vertically arranged and the output end of the output rod is arranged close to the base plate, the roller is slidably connected to the output end, and the rotating shaft of the roller is horizontally arranged and perpendicular to the axis of the detection coil.

6. The large-caliber external eddy current flaw detection equipment according to claim 5 is characterized in that: It also includes a control mechanism, which includes a magnetic saturation in place sensor, a controller and a plurality of upper pressure in place sensors, the number and positions of the upper pressure in place sensors correspond to the upper pressure wheel mechanism, the magnetic saturation in place sensor and the plurality of upper pressure in place sensors are arranged at intervals, the connection line between the magnetic saturation in place sensor and the plurality of upper pressure in place sensors is arranged in the end surfaces of the two frustum parts abutting against each other, the magnetic saturation in place sensor, the plurality of upper pressure in place sensors, the magnetic saturator and the cylinder are electrically connected to the controller respectively.

7. The large-caliber external eddy current flaw detection equipment according to claim 6 is characterized in that: It also includes a marking machine, which is arranged on the upper surface of the bottom plate and is electrically connected to the controller.

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