CN202748342U

CN202748342U - Magnetic particle flaw detector with opening-closing coils having compatible wheel diameters

Info

Publication number: CN202748342U
Application number: CN 201220463725
Authority: CN
Inventors: 徐荣程
Original assignee: SHEYANG COUNTY NONDESTRUCTIVE TESTING TECHNOLOGY RESEARCH INSTITUTE
Current assignee: SHEYANG COUNTY NONDESTRUCTIVE TESTING TECHNOLOGY RESEARCH INSTITUTE
Priority date: 2012-08-30
Filing date: 2012-08-30
Publication date: 2013-02-20
Anticipated expiration: 2022-08-30

Abstract

The utility model discloses a magnetic particle flaw detector with opening-closing coils having compatible wheel diameters, and belongs to nondestructive magnetic flaw detecting equipment. A program-controlled system bin, a coil moving device, an electrode clamping device, a centering device and a circumferential magnetic current source are sequentially distributed on the left side of the rack from top to bottom; an industrial control machine system bin, a coil moving device, an electrode clamping device, a centering device and a longitudinal magnetic current source are sequentially distributed on the right side of the rack from top to bottom; two rows of opening-closing coils having the compatible wheel diameter are distributed above and below a workpiece; a main liquid spraying device is arranged on the side of the workpiece; riding wheel rotating devices are distributed below wheel hubs of a pair of wheel set of the workpiece; and a feeding device and a discharging device are arranged outside the riding wheel rotating devices. By the detector, the two rows of opening-closing coils are used between two wheel hubs of shafts of the wheel set, and the compatibility is good; and after a bridge-type self-flotation device is used, contact pressure between contacts can be automatically balanced to avoid a phenomenon that several contacts are not reliable. The magnetic particle flaw detector is good in compatibility, high in magnetization efficiency, high in flaw detect sensibility, accurate in positioning, simple in structure and low in cost.

Description

But wheel footpath compatibility folding coil magnaflux

Technical field

The utility model relates to a kind of nondestructive magnetic inspection equipment, but a kind of footpath compatibility folding coil magnaflux of taking turns particularly is used for the nondestructive examination of special-shaped workpiece of shaft-like workpiece, I. C. engine crankshaft and other moulding complexity of train wheel equity belt wheel.

Background technology

Since the reform and opening-up, the national economy rapid growth, " scientific and technical innovation, autonomous innovation " become the main flow of domestic industry development, and China's industry is just progressively to the future development of intensive style, energy-saving and emission-reduction, low-carbon (LC).Current, the magnetic powder inspection method at home and abroad every field of industry all is widely used, the ultimate principle that magnetic detects is: when ferrimagnet is magnetized in magnetic field, defective or the structural state variation on material surface and nearly surface can make local magnetoconductivity change, be that magnetic resistance increases, thereby make the corresponding distorted of magnetic flux in the magnetic circuit, part magnetic flux directly passes through defective, part magnetic flux is walked around defective at material internal, some magnetic flux can leave material surface, walk around defective by air and reenter again material, therefore formed stray field at material surface.In general, surface crack is darker, and the amplitude that leakage flux runs off material surface is higher, and is basically linear between them.At the stray field place, the material surface because the magnetic line of force is come in and gone out and form the two poles of the earth (S, the N utmost point) in the defective both sides is if when spraying tiny ferromagnetic powder on this surface, place, surface leakage magnetic field can absorb magnetic and form the magnetic trace, demonstrates defect shape.For adapting to the in recent years main flow operational mode of railroad train high-speed overload, for the most important parts of train operation wheel concerning, its impact load is increased considerably, working environment is severeer, and this has just proposed the more requirement of Gao Gengyan to the technical indicator of taking turns right workmanship and take turns magnetic particle inspection apparatus.The prior art situation: defect-detecting equipment to rolling stock wheel when carrying out Non-Destructive Testing, need to be between two wheels be to wheel hub, and comprise that the wheel of two ends axle journal carries out induced magnetization with the solenoid coil energising of multi-turn respectively to three positions of axle.The internal diameter of solenoid coil need to be close to wheel as far as possible just can have suitable efficient to axle.The patent No. is that the Chinese patent of ZL200310112725.1 discloses a kind of double row comb electrode folding coil wheel pair magnaflux, this machine adopts double comb teeth shape electrode vertical folding multi-turn solenoid coil and coil folding operating mechanism thereof, two groups of moving coils have been set up, the magnetizable electrode chuck of self-straightening structure, the automatic feeder of band buffering, automatic discharge apparatus, novel structure and the technology such as high stability workpiece rotating support roller and roller bracket structure, and be equipped with industrial control computer and special-purpose running control software and network communication software, formed a novel automatic railway vehicle wheel to magnetic particle testing system, compare with original same category of device, on function and performance, all be improved largely.But there is following defective in this machine: 1, owing to adopting the rotary opening solenoid coil, the contact of armature contact is restricted, electrode sparking and scaling loss galvanic corrosion phenomenon can appear when applying larger electric current, cause magnetization current unstable, flaw detection sensitivity is low, reliability is relatively poor, easily cause and Lou visit phenomenon, hiding potential safety hazard; 2, compatible relatively poor to different wheel gauge structures if the wheel between centers has different constructional device (such as larger gear, deceleration box, brake disc etc.), generally can not be realized whole containings; 3, many to upper annex to wheel, quality is heavy, the workpiece that inertia is large, and the impact resistance that rotates riding wheel apparatus is relatively poor.The technology person of entering of R﹠D institution and enterprise is constantly being explored, is being studied, wish to develop that a kind of compatibility is good, flaw detection sensitivity is high, the magnaflux of superior performance, although make some progress, in practice, still exist the technical barrier that not yet overcomes.

Summary of the invention

The purpose of this utility model is to overcome above deficiency, but provide a kind of footpath compatibility folding coil magnaflux of taking turns, this machine is between two wheel hubs of wheel to axle, adopt double folding coil, can extraordinary compatibility be arranged to different wheel gauge structures, and hydrojet is even, has stronger resistance to impact, and flaw detection sensitivity is high, good reliability.

The technical scheme that its technical matters that solves the utility model adopts is: contain the circumferential magnetization current source, charging/discharging device, the electrode clamp device, the coil mobile device, frame, the stored program controlled storehouse, centering apparatus, the folding coil, the main jet liquid device, the industrial computer system storehouse, the support roller wheelwork, frame is the rectangle portal frame, the left side of frame, right both sides are made the unit from top to bottom and are refused body, the left surface unit is refused body and is furnished with the stored program controlled storehouse topmost, is furnished with successively the coil mobile device downwards, the electrode clamp device, centering apparatus, the circumferential magnetization current source, right flank unit cabinet is furnished with the industrial computer system storehouse topmost, is furnished with successively the coil mobile device downwards, the electrode clamp device, centering apparatus, the longitudinal magnetization current source, the top of frame is also made the unit and is refused body, but is furnished with the compatible double folding coil in wheel footpath in the above and below of detected workpiece, in detected side surface of workpiece the main jet liquid device is installed, be furnished with the support roller wheelwork below taking turns wheel hub detected workpiece is a pair of, the support roller wheelwork outside is provided with charging/discharging device; Described double folding coil is detecting between two wheel hubs of workpiece wheel to axle, this folding coil is comprised of lifting electrode group and fixed electorde group, the fixed electorde group is comprised of a plurality of fixed electordes, fixed electorde contains lower electrode tip, electrode spring, the electrode guide holder, insulating bushing, because the effect of spring, electrode tip can fluctuate, thereby guarantee that each contact contact is good, the fixed electorde group is installed on the bottom electrode beam, the bottom electrode beam is fixed on the bottom in the frame portal frame, each fixed electorde is connected to form under the toroidal winding half side with braided wire again, lifting electrode group liftable, formed by a plurality of lifting electrodes, the lifting electrode contains the rise fall of electrodes cylinder, guide rod, guide frame, busbar, bridge-type self-relocation device, the conduction clamping cylinder, guide frame is located on the frame, guide rod is located on the guide frame, be provided with the rise fall of electrodes cylinder between two guide rods, guide rod is provided with the good busbar of electric conductivity, and contact compression with the conduction clamping cylinder, each electrode tip of lifting electrode is furnished with bridge-type self-relocation device, liftable lifting electrode group is assembled on the fastening frame, and corresponding one by one with the fixed electorde group, forms on the toroidal winding half side; Described moving coil device is positioned at wheel to the axle journal position at axle two ends, the moving coil device is the closed solenoid coil of a kind of multiturn, contain cylinder, the coil gripping member, coil, sleeve base, the axis of guide, both sides at the frame portal frame are furnished with respectively cylinder, cylinder matches with the axis of guide, internal coil diameter is a bit larger tham detected workpiece wheel to the axle journal at axle two ends, one side of coil is fixed in an end of the axis of guide by the coil gripping member, and make the hub of a spool of moving coil device consistent to the axle center with detected workpiece wheel, the axis of guide is provided with two sleeve bases, act on the workpiece wheel to the moving coil device of axle two end axles neck position and act on the workpiece wheel to the folding coil at axis body position between two wheel hubs, be connected on circumferential magnetization current source and the longitudinal magnetization current source by braided wire, form a series connection solenoidal magnetization loop; Described centering apparatus is located on the electrode clamp device of frame both sides, contain roller, connecting rod, bearing, rotating shaft, electrode, guide wheel, current-carrying plate, roller contacts wheel hub automatically, and make different pendulum angles according to the hub diameter difference, connecting rod can convert automatically according to pendulum angle the lifting displacement of terminal clamp to; Described rotation riding wheel apparatus is positioned at bottom electrode beam bottom, contain two support roller groups, universal joint assembly, transmission shaft, shaft coupling, reduction gear, below the right side of frame portal frame, be provided with reduction gear, reduction gear is connected with transmission shaft by shaft coupling, transmission shaft is connected by universal joint assembly one of them supporting-roller shaft with left side support roller group, this supporting-roller shaft is connected by shaft coupling one of them supporting-roller shaft with right side support roller group, described support roller group contains roller bracket, the roller bearing units of usheing to seat, support roller, supporting-roller shaft, each support roller group contains two support rollers, two support rollers are located at respectively on two supporting-roller shaft, each support roller two ends is respectively equipped with the roller bearing units of usheing to seat, be provided with roller bracket under two support rollers, two symmetrical placements of roller bracket, the special insulation measures of the inner employing of support roller, the support roller rolling surface is provided with and takes turns the curved surface that wheel hub baffle wheel profile is adapted; The workpiece wheel is equipped with the main jet liquid device to the side, contain hydrojet supervisor, flexible flexible sparge pipe, liquid-spraying control device, on the hydrojet supervisor, evenly distribute flexible flexible sparge pipe is housed, during use, can adjust as required the arbitrarily angled and position of each nozzle, so that magnetic flaw detection ink is evenly distributed on the whole effects on surface of taking turns, hydrojet supervisor top is provided with liquid-spraying control device.

The know-why that its technical matters that solves the utility model adopts is: this defectoscope is for the nondestructive examination of the special-shaped workpiece of shaft-like workpiece, I. C. engine crankshaft and other moulding complexity of train wheel equity belt wheel.Between two wheel hubs of wheel to axle, adopt double folding coil, half side on the folding coil is liftable electrode group, the rise fall of electrodes cylinder has long stroke, can extraordinary compatibility be arranged to different wheel gauge structures, even the wheel between centers has different constructional devices (such as larger gear, deceleration box, brake disc etc.), all it can be contained.Lifting electrode group upper electrode tip is also used bridge-type self-relocation device, and its energy self-poise contact Contact pressure avoids occurring the unreliable phenomenon of individual contacts.In order to make the guide rod conduction good, use the good busbar of electric conductivity at guide rod, and contact compression with the conduction clamping cylinder, eliminate the gap, guarantee that conduction is reliable.Lifting electrode group is assembled on the fastening frame, thereby solid and reliable, and corresponding one by one with the bottom electrode group.When work, the rise fall of electrodes cylinder drives lifting electrode group and makes vertical displacement movement, does the coil open and close movement with the direction of aiming at the fixed electorde group.When the piston rod of rise fall of electrodes cylinder is made return movement, lifting electrode group and fixed electorde component from, form the space between the two arrays of electrodes, can allow workpiece free in and out the flaw detection station, when the piston rod of rise fall of electrodes cylinder was done pushing tow motion and put in place, corresponding each meshed one by one to electrode contacts between lifting electrode group and the fixed electorde group, at the multi-turn solenoid coil of a closure of circuit formation, so that by electric current, workpiece is carried out induced magnetization or demagnetization operation.Taking turns right axle journal position, is the zone of wheel to meeting with stresses when the train operation and relatively concentrating, and also is the key area of flaw detection operation, and the two ends of its place, position axle, the position that the magnetic line of force significantly disperses when being again magnetization.In order to strengthen taking turns the magnetization effect to the two ends axle journal, at wheel the coil mobile device has been installed at two ends, coil moves by cylinder and realizes, and distance can rest on the optional position as required, thereby obtains best detection effect.When the lifting electrode group of folding coil and fixed electorde group were done disengaging movement, two coil mobile devices synchronously moved along the direction of leaving axle journal under the driving of cylinder separately backward, to form the space, are convenient to workpiece and free in and out the operation position; When the folding coil was made closing motion, two coil mobile devices synchronously travelled forward under the driving of cylinder separately, make coil just in time be enclosed within the right axle journal position of wheel, form the electric loop of induced magnetization of a multi-turn solenoid coil closure.

Because wheel is many to specification, hub diameter differs greatly, and during circumferential magnetization, can adapt to the needs that different wheels footpath is detected for making two end electrodes, need terminal clamp is changed from motion tracking according to the wheel footpath is different, so on the electrode clamp device of frame both sides, centering apparatus is housed respectively.During work, roller contacts wheel hub automatically, and make different pendulum angles according to the hub diameter difference, owing to adopting optimal design, connecting rod can convert automatically according to pendulum angle the lifting displacement of terminal clamp to, thereby automatically follow the tracks of journal centre, to obtain best contact area, prevent electrode sparking and scaling loss galvanic corrosion phenomenon.Wheel needs in good time automatic rotation in the flaw detection process, in order to spray equably magnetic flaw detection ink and search for shown crack defect out when observing flaw detection, can hold up the holder wheelwork of wheel to also rotating so wheel must be provided with magnaflux.Because the holder wheelwork holds up and drives the very large wheel of weight to rotating except need, also will bear the impact load of charging, discharging, therefore larger intensity need to be arranged.

The beneficial effects of the utility model are: this machine adopts double folding coil between two wheel hubs of wheel to axle.The rise fall of electrodes cylinder has long stroke, can extraordinary compatibility be arranged to different wheel gauge structures, and lifting electrode group upper electrode tip is also used bridge-type self-relocation device, and its energy self-poise contact Contact pressure avoids occurring the unreliable phenomenon of individual contacts.Adopt new-type support roller wheelwork, have stronger resistance to impact.For hydrojet even, at wheel the side is equipped with liquid-jet device, on the hydrojet supervisor, evenly distribute flexible flexible sparge pipe is housed, during use, can adjust as required the arbitrarily angled and position of each nozzle, so that magnetic flaw detection ink is evenly distributed on the whole effects on surface of taking turns, and guarantee in the pipeline residual magnetic liquid no longer water clock to axletree, destroy the magnetic trace that has formed.Footpath compatibility folding coil magnaflux compatibility is good, magnetization efficient is high, flaw detection sensitivity is high, registration, simple in structure, cheap but this is taken turns.

Description of drawings

The below further describes the utility model in conjunction with the accompanying drawings and embodiments:

But Fig. 1 is wheel footpath compatibility folding coil magnaflux front view;

But Fig. 2 is wheel footpath compatibility folding coil magnaflux left view;

But Fig. 3 is wheel footpath compatibility folding coil magnaflux support roller wheelwork front view;

But Fig. 4 is wheel footpath compatibility folding coil magnaflux support roller wheelwork vertical view.

In the drawings: 1 circumferential magnetization current source, 2 charging/discharging devices, 3 coils, 4 electrode clamp devices, 5 coil mobile devices, 6 cylinders, 7 sleeve bases, 8 axis of guides, 9 coil gripping members, 10 frames, 11 stored program controlled storehouses, 12 centering apparatus, 13 bridge-type self-relocation devices, 14 hydrojets supervisor, 15 flexible flexible sparge pipes, 16 lifting electrodes, 17 rise fall of electrodes cylinders, 18 liquid-spraying control devices, 19 guide rods, 20 main jet liquid devices, 21 workpiece, 22 bearings, 23 rollers, 24 rotating shafts, 25 bottom electrode beams, 26 fixed electordes, 27 industrial computer system storehouses, 28 electrodes, 29 current-carrying plates, 30 guide wheels, 31 support roller wheelworks, 32 longitudinal magnetization current sources, 33 connecting rods, 34 guide frames, 35 busbars, 36 braided wires, 37 conduction clamping cylinders, 38 roller brackets, 39 roller bearing units of usheing to seat, 40 support rollers, 41 supporting-roller shaft, 42 universal joint assemblies, 43 transmission shafts, 44 shaft couplings, 45 reduction gear.

Embodiment

At Fig. 1,2,3, in 4, this magnaflux contains circumferential magnetization current source 1, charging/discharging device 2, electrode clamp device 4, coil mobile device 5, frame 10, stored program controlled storehouse 11, centering apparatus 12, the folding coil, main jet liquid device 20, industrial computer system storehouse 27, support roller wheelwork 31, frame 10 is the rectangle portal frame, the left side of frame 10, right both sides are made the unit from top to bottom and are refused body, the left surface unit is refused body and is furnished with stored program controlled storehouse 11 topmost, is furnished with successively coil mobile device 5 downwards, electrode clamp device 4, centering apparatus 12, circumferential magnetization current source 1, right flank unit cabinet is furnished with industrial computer system storehouse 27 topmost, is furnished with successively coil mobile device 5 downwards, electrode clamp device 4, centering apparatus 12, longitudinal magnetization current source 32, the top of frame 10 is also made the unit and is refused body, but is furnished with the compatible double folding coil in wheel footpath in the above and below of detected workpiece, in detected side surface of workpiece main jet liquid device 20 is installed, be furnished with support roller wheelwork 31 below taking turns wheel hub detected workpiece is a pair of, support roller wheelwork 31 outsides are provided with charging/discharging device 2; Described double folding coil is detecting between two wheel hubs of workpiece wheel to axle, this folding coil is comprised of lifting electrode group and fixed electorde group, the fixed electorde group is comprised of a plurality of fixed electordes 26, fixed electorde 26 contains lower electrode tip, electrode spring, the electrode guide holder, insulating bushing, because the effect of spring, electrode tip can fluctuate, thereby guarantee that each contact contact is good, the fixed electorde group is installed on the bottom electrode beam 25, bottom electrode beam 25 is fixed on the bottom in frame 10 portal frames, each fixed electorde 26 is connected to form under the toroidal winding half side with braided wire 36 again, lifting electrode group liftable, formed by a plurality of lifting electrodes 16, lifting electrode 16 contains rise fall of electrodes cylinder 17, guide rod 19, guide frame 34, busbar 35, bridge-type self-relocation device 13, conduction clamping cylinder 37, guide frame 34 is located on the frame 10, guide rod 19 is located on the guide frame 34, be provided with rise fall of electrodes cylinder 17 between two guide rods 19, guide rod 19 is provided with the good busbar of electric conductivity 35, and with the conduction clamping cylinder 37 contact compression, lifting electrode 16 each electrode tip are furnished with bridge-type self-relocation device 13, liftable lifting electrode group is assembled on the fastening frame 10, and corresponding one by one with the fixed electorde group, form on the toroidal winding half side; Described moving coil device 5 is positioned at wheel to the axle journal position at axle two ends, moving coil device 5 is the closed solenoid coils of a kind of multiturn, contain cylinder 6, coil gripping member 9, coil 3, sleeve base 7, the axis of guide 8, both sides at frame 10 portal frames are furnished with respectively cylinder 6, cylinder 6 matches with the axis of guide 8, coil 3 internal diameters are a bit larger tham detected workpiece wheel to the axle journal at axle two ends, one side of coil 3 is fixed in an end of the axis of guide 8 by coil gripping member 9, and make the hub of a spool of moving coil device 5 consistent to the axle center with detected workpiece wheel, the axis of guide 8 is provided with two sleeve bases 7, act on the workpiece wheel to the moving coil device 5 of axle two end axles neck position and act on the workpiece wheel to the folding coil at axis body position between two wheel hubs, be connected on circumferential magnetization current source 1 and the longitudinal magnetization current source 32 by braided wire 36, form a series connection solenoidal magnetization loop; Described centering apparatus 12 is located on the electrode clamp device 4 of frame both sides, contain roller 23, connecting rod 33, bearing 22, rotating shaft 24, electrode 28, guide wheel 30, current-carrying plate 29, roller contacts wheel hub automatically, and make different pendulum angles according to the hub diameter difference, connecting rod 33 can convert automatically according to pendulum angle the lifting displacement of terminal clamp to; Described rotation riding wheel apparatus 31 is positioned at bottom electrode beam 25 bottoms, contain two support roller groups, universal joint assembly 42, transmission shaft 43, shaft coupling 44, reduction gear 45, below the right side of frame 10 portal frames, be provided with reduction gear 45, reduction gear 45 is connected with transmission shaft 43 by shaft coupling 44, transmission shaft 43 is connected with one of them supporting-roller shaft 41 of left side support roller group by universal joint assembly 42, this supporting-roller shaft 41 is connected with one of them supporting-roller shaft 41 of right side support roller group by shaft coupling 44, described support roller group contains roller bracket 38, the roller bearing units 39 of usheing to seat, support roller 40, supporting-roller shaft 41, each support roller group contains two support rollers 40, two support rollers 40 are located at respectively on two supporting-roller shaft 41, each support roller 40 two ends is respectively equipped with the roller bearing units 39 of usheing to seat, be provided with roller bracket 38 under two support rollers 40, two roller bracket 38 symmetrical placements, the special insulation measures of support roller 40 inner employings, support roller 40 rolling surfaces are provided with and take turns the curved surface that wheel hub baffle wheel profile is adapted; The workpiece wheel is equipped with main jet liquid device 20 to the side, contain hydrojet supervisor 14, flexible flexible sparge pipe 15, liquid-spraying control device 18, on hydrojet supervisor 14, evenly distribute flexible flexible sparge pipe 15 is housed, during use, can adjust as required the arbitrarily angled and position of each nozzle, so that magnetic flaw detection ink is evenly distributed on the whole effects on surface of taking turns, hydrojet is responsible for 14 tops and is provided with liquid-spraying control device.

This defectoscope is for the nondestructive examination of the special-shaped workpiece of shaft-like workpiece, I. C. engine crankshaft and other moulding complexity of train wheel equity belt wheel.Between two wheel hubs of wheel to axle, adopt double folding coil, half side on the folding coil is liftable electrode group, rise fall of electrodes cylinder 17 has long stroke, can extraordinary compatibility be arranged to different wheel gauge structures, even the wheel between centers has different constructional devices (such as larger gear, deceleration box, brake disc etc.), all it can be contained.Lifting electrode group upper electrode tip is also used bridge-type self-relocation device 13, and its energy self-poise contact Contact pressure avoids occurring the unreliable phenomenon of individual contacts.In order to make guide rod 19 conductions good, use the good busbar 35 of electric conductivity at guide rod 19, and contact compression with conduction clamping cylinder 37, eliminate the gap, guarantee that conduction is reliable.Lifting electrode group is assembled on the fastening frame 10, thereby solid and reliable, and corresponding one by one with the bottom electrode group.When work, rise fall of electrodes cylinder 17 drives lifting electrode group and makes vertical displacement movement, does the coil open and close movement with the direction of aiming at the fixed electorde group.When the piston rod of rise fall of electrodes cylinder 17 is made return movement, lifting electrode group and fixed electorde component from, form the space between the two arrays of electrodes, can allow workpiece 21 free in and out the flaw detection station, when the piston rod of rise fall of electrodes cylinder 17 was done pushing tow motion and put in place, corresponding each meshed one by one to electrode contacts between lifting electrode group and the fixed electorde group, at the multi-turn solenoid coil of a closure of circuit formation, so that by electric current, workpiece 21 is carried out induced magnetization or demagnetization operation.Taking turns right axle journal position, is the zone of wheel to meeting with stresses when the train operation and relatively concentrating, and also is the key area of flaw detection operation, and the two ends of its place, position axle, the position that the magnetic line of force significantly disperses when being again magnetization.In order to strengthen taking turns the magnetization effect to the two ends axle journal, at wheel coil mobile device 5 has been installed at two ends, coil moves by cylinder 6 and realizes, and distance can rest on the optional position as required, thereby obtains best detection effect.When the lifting electrode group of folding coil and fixed electorde group were done disengaging movement, two coil mobile devices 5 synchronously moved along the direction of leaving axle journal under the driving of cylinder 6 separately backward, to form the space, are convenient to workpiece 21 and free in and out the operation position; When the folding coil was made closing motion, two coil mobile devices 5 synchronously travelled forward under the driving of cylinder separately, make coil just in time be enclosed within the right axle journal position of wheel, form the electric loop of induced magnetization of a multi-turn solenoid coil closure.

Because wheel is many to specification, hub diameter differs greatly, during circumferential magnetization, for making two end electrodes can adapt to the needs that different wheels footpath is detected, need terminal clamp is changed from motion tracking according to the wheel footpath is different, so when centering apparatus 12 work is housed respectively on frame 10 both sides electrode clamp devices 4, roller 23 is the contact wheel hub automatically, and make different pendulum angles according to the hub diameter difference, because adopt optimal design, connecting rod 33 can convert automatically according to pendulum angle the lifting displacement of terminal clamp to, thereby automatically follows the tracks of journal centre, to obtain best contact area, prevent electrode sparking and scaling loss galvanic corrosion phenomenon.Wheel needs in good time automatic rotation in the flaw detection process, in order to spray equably magnetic flaw detection ink and search for shown crack defect out when observing flaw detection, can hold up the holder wheelwork 31 of wheel to also rotating so wheel must be provided with magnaflux.Because holder wheelwork 31 holds up and drives the very large wheel of weight to rotating except need, also will bear the impact load of charging, discharging, therefore larger intensity need to be arranged.

Claims

1. but take turns footpath compatibility folding coil magnaflux, contain the circumferential magnetization current source, charging/discharging device, the electrode clamp device, the coil mobile device, frame, the stored program controlled storehouse, centering apparatus, the folding coil, the main jet liquid device, the industrial computer system storehouse, the support roller wheelwork, it is characterized in that: frame is the rectangle portal frame, the left side of frame, right both sides are made the unit from top to bottom and are refused body, the left surface unit is refused body and is furnished with the stored program controlled storehouse topmost, is furnished with successively the coil mobile device downwards, the electrode clamp device, centering apparatus, the circumferential magnetization current source, right flank unit cabinet is furnished with the industrial computer system storehouse topmost, is furnished with successively the coil mobile device downwards, the electrode clamp device, centering apparatus, the longitudinal magnetization current source, the top of frame is also made the unit and is refused body, but is furnished with the compatible double folding coil in wheel footpath in the above and below of detected workpiece, in detected side surface of workpiece the main jet liquid device is installed, be furnished with the support roller wheelwork below taking turns wheel hub detected workpiece is a pair of, the support roller wheelwork outside is provided with charging/discharging device; Described double folding coil is detecting between two wheel hubs of workpiece wheel to axle, this folding coil is comprised of lifting electrode group and fixed electorde group, the fixed electorde group is comprised of a plurality of fixed electordes, fixed electorde contains lower electrode tip, electrode spring, the electrode guide holder, insulating bushing, because the effect of spring, electrode tip can fluctuate, thereby guarantee that each contact contact is good, the fixed electorde group is installed on the bottom electrode beam, the bottom electrode beam is fixed on the bottom in the frame portal frame, each fixed electorde is connected to form under the toroidal winding half side with braided wire again, lifting electrode group liftable, formed by a plurality of lifting electrodes, the lifting electrode contains the rise fall of electrodes cylinder, guide rod, guide frame, busbar, bridge-type self-relocation device, the conduction clamping cylinder, guide frame is located on the frame, guide rod is located on the guide frame, be provided with the rise fall of electrodes cylinder between two guide rods, guide rod is provided with the good busbar of electric conductivity, and contact compression with the conduction clamping cylinder, each electrode tip of lifting electrode is furnished with bridge-type self-relocation device, liftable lifting electrode group is assembled on the fastening frame, and corresponding one by one with the fixed electorde group, forms on the toroidal winding half side; Described moving coil device is positioned at wheel to the axle journal position at axle two ends, the moving coil device is the closed solenoid coil of a kind of multiturn, contain cylinder, the coil gripping member, coil, sleeve base, the axis of guide, both sides at the frame portal frame are furnished with respectively cylinder, cylinder matches with the axis of guide, internal coil diameter is a bit larger tham detected workpiece wheel to the axle journal at axle two ends, one side of coil is fixed in an end of the axis of guide by the coil gripping member, and make the hub of a spool of moving coil device consistent to the axle center with detected workpiece wheel, the axis of guide is provided with two sleeve bases, act on the workpiece wheel to the moving coil device of axle two end axles neck position and act on the workpiece wheel to the folding coil at axis body position between two wheel hubs, be connected on circumferential magnetization current source and the longitudinal magnetization current source by braided wire, form a series connection solenoidal magnetization loop; Described centering apparatus is located on the electrode clamp device of frame both sides, contain roller, connecting rod, bearing, rotating shaft, electrode, guide wheel, current-carrying plate, roller contacts wheel hub automatically, and make different pendulum angles according to the hub diameter difference, connecting rod can convert automatically according to pendulum angle the lifting displacement of terminal clamp to; Described rotation riding wheel apparatus is positioned at bottom electrode beam bottom, contain two support roller groups, universal joint assembly, transmission shaft, shaft coupling, reduction gear, below the right side of frame portal frame, be provided with reduction gear, reduction gear is connected with transmission shaft by shaft coupling, transmission shaft is connected by universal joint assembly one of them supporting-roller shaft with left side support roller group, this supporting-roller shaft is connected by shaft coupling one of them supporting-roller shaft with right side support roller group, described support roller group contains roller bracket, the roller bearing units of usheing to seat, support roller, supporting-roller shaft, each support roller group contains two support rollers, two support rollers are located at respectively on two supporting-roller shaft, each support roller two ends is respectively equipped with the roller bearing units of usheing to seat, be provided with roller bracket under two support rollers, two symmetrical placements of roller bracket, the special insulation measures of the inner employing of support roller, the support roller rolling surface is provided with and takes turns the curved surface that wheel hub baffle wheel profile is adapted; The workpiece wheel is equipped with the main jet liquid device to the side, contain hydrojet supervisor, flexible flexible sparge pipe, liquid-spraying control device, on the hydrojet supervisor, evenly distribute flexible flexible sparge pipe is housed, during use, can adjust as required the arbitrarily angled and position of each nozzle, so that magnetic flaw detection ink is evenly distributed on the whole effects on surface of taking turns, hydrojet supervisor top is provided with liquid-spraying control device.