CN101441196A - Wire rope flaw detection device - Google Patents
Wire rope flaw detection device Download PDFInfo
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- CN101441196A CN101441196A CNA2008101812487A CN200810181248A CN101441196A CN 101441196 A CN101441196 A CN 101441196A CN A2008101812487 A CNA2008101812487 A CN A2008101812487A CN 200810181248 A CN200810181248 A CN 200810181248A CN 101441196 A CN101441196 A CN 101441196A
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Abstract
The invention provides a steel wire rope fault detection apparatus capable of conveniently carrying out fault detection diagnosis. The steel wire rope fault detection apparatus has a magnetization unit (4) and a flux detection unit (3), the magnetization unit (4) magnetizes a steel wire rope (1) intertwined with a plurality of steel wires (1a), the flux detection unit (3) detects leakage flux of the steel wire rope (1), furthermore the steel wire rope fault detection apparatus further has a magnetic flux adjusting unit (5) for adjusting magnetic flux through the steel wire rope (1).
Description
Technical field
The present invention relates to a kind of wire-rope flaw detector.
Background technology
In the ordinary course of things, the wire rope of uses such as elevator, lifter, cable car or crane is formed by many steel wire twisteds.This kind wire rope is because of tired and wearing and tearing etc., the situation that the steel wire of wire rope ruptures gradually may occur constituting.When As time goes on and gradually the fracture radical of steel wire increases, when the radical that causes rupturing has exceeded standard value, judge that exchange to it the serviceable life of wire rope.Therefore, be necessary the fracture radical that detects steel wire by making regular check on, and whether can continue safe handling to wire rope and assess.
In the past, check the fracture radical of the wire rope in the use by naked eyes.But, when checking the very long wire rope of length,, then need to spend the very long working time if with the naked eye check.
Therefore, in recent years, for example proposed a kind of device in patent documentation 1, it adopts the failure detector (steel rope flow detector) of detecting a flaw according to the electromagnetic test method to detect the fracture radical of wire rope quantitatively.This failure detector for example uses 1 group permanent-magnet that wire rope is magnetized along its length, detect the leakage magnetic flux of leaking by the detecting coil that is arranged between the magnet, check the crack conditions (for example with reference to patent documentation 1) of steel wire thus from the breaking portion of steel wire.
When magnetic flux by magnetics such as wire rope in the time, if variation etc. has taken place the shape of magnetic, then the magnetic resistance of the passage that magnetic flux passed through can change, thereby causes magnetic flux path to change, this moment can produce leakage magnetic flux.In above-mentioned electromagnetic test method, be higher than the leakage magnetic flux that fracture portion magnetic resistance on every side produces by wire rope being magnetized the magnetic resistance that detects invar silk breaking portion.
Patent documentation 1: the flat 7-198684 communique of Japan's open patent
But, because steel wire and the strand that forms by many steel wire twisteds and length of steel wire rope direction not parallel (strand with respect to the length of steel wire rope direction at the vergence direction twisted), so on the surface of wire rope, be formed with concavo-convex.
Because passing through of magnetic flux upset in these concavo-convex meetings, so produce the magnetic resistance of projecting part in jog branch.Therefore, also can produce leakage magnetic flux at these jogs, and these leakage magnetic flux can become disturbing factor when the detection of broken part.In order to improve diagnostic accuracy, importantly make the leakage magnetic flux that produces from breaking portion fully greater than the leakage magnetic flux that produces by disturbing factor.The leakage magnetic flux that produces from breaking portion has the also big more tendency of leakage magnetic flux of the big more then breaking portion of launching towards wire rope of magnetic flux, but along with wire rope near the magnetic saturation state, can occur also increasing, perhaps not enter wire rope in the magnetic flux that produces by the magnetization unit of magnetization wire rope and leaked magnetic flux situation about also increasing aloft from the jog leaked magnetic flux on wire rope surface.Therefore, need magnetize wire rope with suitable magnetic field intensity.
But, the employed steel wire of wire rope, its thickness is different because of the kind of wire rope, and the twisted method is also different.Therefore, even under the equal situation of the external diameter of wire rope, if the thickness of its inner steel wire quantity used and steel wire is different, then the concavo-convex situation on the magnetic resistance of wire rope itself and wire rope surface is also different.So even identical towards the magnetic flux of wire rope emission, the magnetic flux that leaks out from the jog on wire rope surface and breaking portion etc. also can change because of the different of wire rope kind.
Summary of the invention
The present invention proposes in order to address the above problem, the object of the present invention is to provide a kind of wire-rope flaw detector, this wire-rope flaw detector has very high diagnostic accuracy, can not be subjected to the influence of wire rope kind and correctly detects the leakage magnetic flux of breaking portion.
To achieve these goals, wire-rope flaw detector involved in the present invention has guiding device, magnetization unit and magnetic flux detecting unit, and be used to detect the damage location of wire rope, wherein this guiding device is used to keep the wire rope that formed by many steel wire twisteds, this magnetization unit is used for wire rope is magnetized, this magnetic flux detecting unit detects the leakage magnetic flux of described wire rope, and described wire-rope flaw detector further has the magnetic flux adjustment unit of adjusting by the magnetic flux of wire rope.
The invention effect
According to the present invention, can carry out high-precision wire rope flaw detection to different types of wire rope.
Description of drawings
Fig. 1 is the exploded perspective view of the wire-rope flaw detector of expression the 1st embodiment involved in the present invention.
Fig. 2 is the front view of wire-rope flaw detector shown in Figure 1.
Fig. 3 is the figure of expression wire rope, (a) is the sectional view of wire rope, (b) is the vertical view of wire rope.
Fig. 4 represents the curve map that concerns between the position of the wire rope that do not rupture and the leakage magnetic flux.
Fig. 5 is the curve map that concerns between the position of expression wire rope that fracture has taken place and the leakage magnetic flux.
Fig. 6 is used for the synoptic diagram that leakage magnetic flux to the wire rope on the wire-rope flaw detector that is arranged on Fig. 1 describes.
Fig. 7 is the sectional view that is illustrated in the magnetic flux situation when wire rope is magnetized in this device, the key diagram of the magnetic flux situation when being close together between wire rope and the magnetization unit (a) (b) is the key diagram of distance between wire rope and the magnetization unit magnetic flux situation when far away.
Fig. 8 is the stereographic map of the wire-rope flaw detector of expression the 2nd embodiment involved in the present invention.
Fig. 9 is the front view of wire-rope flaw detector shown in Figure 1.
Figure 10 is the figure of the wire-rope flaw detector of expression the 3rd embodiment that relates to of the present invention, (a) is the longitudinal sectional drawing of this failure detector, (b) is the sectional view at 10B-10B line place.
Figure 11 is the transverse cross-sectional view of the variation of expression wire-rope flaw detector shown in Figure 10.
Figure 12 is the exploded perspective view of the wire-rope flaw detector of expression the 4th embodiment involved in the present invention.
Symbol description
1 wire rope
2 guiding devices
3 magnetic flux detecting units
4 magnetization units
5 septs (magnetic flux adjustment unit)
31 gaps
32 in conjunction with pin
33 engagement grooves
54 yoke sidepieces
Embodiment
Followingly preferred implementation of the present invention is described with reference to accompanying drawing.
(the 1st embodiment)
Fig. 1 is the exploded perspective view of the wire-rope flaw detector (hereinafter referred to as failure detector) of expression one preferred implementation, and Fig. 2 is the sectional view of failure detector shown in Figure 1.
As shown in Figure 1, the failure detector 10 magnetic flux detecting unit 3 that has the guiding device 2 of guiding steel wire rope 1 (shown in Figure 2), wire rope 1 is carried out magnetized magnetization unit 4 and detects wire rope 1 leakage magnetic flux.
Be entrenched on the semicylindrical pole surface 4a of forming of magnetization unit 4 by recess 11, guiding device 2 is fixed on the magnetization unit 4 guiding device 2.In addition, the two side portions 12 of guiding device 2 is provided with hook part 17, both sides in the pole parts 14 of magnetization unit 4 are provided with Lock Part 21, Lock Part 21 has parts 19a that keeps clasp 18 and the parts 19b that is fixed on the pole parts 14, constitutes clasp lock 22 (the clasp lock has 4 groups in the present embodiment) by hook part 17 and Lock Part 21.Clasp lock 22 fastens by making clasp 18 and hook part 17, and guiding device 2 is fixed on the magnetization unit 4.
The magnetic flux detecting unit 3 that is used to detect the leakage magnetic flux that the wire rope 1 from the guiding device 2 leaks out is fixed on the back side of guiding device 2.Magnetic flux detecting unit 3 is positioned at the substantial middle part of the length direction of guiding device 2, and is set between the pole parts 14b of the pole parts 14a of the N utmost point of magnetization unit 4 and the S utmost point.Magnetic flux detecting unit 3 has the magnetic flux detection coil of reeling and being provided with along semicylindrical recess, and in the time of in magnetic flux passes through this coil, electric current circulates in coil.Magnetic flux detecting unit 3 is fixed on the back side of guiding device 2, so the distance between magnetic flux detecting unit 3 and the guiding device 2 is constant.
Magnetic flux detecting unit 3 is connected with arithmetic unit 6, and this arithmetic unit 6 is used for calculating by magnetic flux detecting unit 3 detected magnetic flux, is connected with the output unit (display) 7 that is used to export and show operation result on this arithmetic unit 6.
The wire-rope flaw detector 10 of present embodiment except said structure, also has the magnetic flux adjustment unit of adjustment towards the magnetic flux of wire rope 1 emission.
In the present embodiment, the magnetic flux adjustment unit is made of the sept 5 that adopts nonmagnetic material to form.Sept 5 is set between the pole surface 4a of guiding device 2 and magnetization unit 4, is the semicircular cylinder shape.
The volume of sept 5 is according to the kind decision of the wire rope of flaw detection object, in the present embodiment, because sept 5 is arranged between the pole surface 4a and guiding device 2 of magnetization unit 4, and its thickness is certain, so the distance between pole surface 4a and the guiding device 2 is according to the kind decision of wire rope.
Material as constituting sept 5 so long as the nonmagnetic material material then has no particular limits, for example can adopt plastic material, elastomeric material and clay material etc.But, sept 5 preferably can not changed because of external force (thickness can not change) by shape and material with rigidity constitutes, in the present embodiment, used putty (putty) has been configured as that semicylindrical bending makes its sclerosis after tabular and the sept that obtains.
Below the action of the wire-rope flaw detector of present embodiment is described.
As shown in Figure 2, wire rope 1 moves (being directed) on the recess 11 at guiding device under the guiding of guiding device 2.For example, when detecting the breaking portion (damaged portion) of the employed wire rope 1 of elevator, the magnetization unit 4 of this failure detector 10 is fixed on the floor or wall of close wire rope of elevator.By making elevator lifting, wire rope 1 is moved on guiding device 2, can be to the diagnosis of detecting a flaw of the wire rope integral body of strip.
Under this state, wire rope 1 unit 4 magnetization (having magnetic flux to pass through) that is magnetized.Because in magnetization unit 4, the pole parts 14b of magnetic flux from the pole parts 14a of the N utmost point towards the S utmost point passes through, so wire rope 1 is magnetized in the longitudinal direction.That is to say that formation is from the magnetic circuit of the pole parts 14a of pole parts 14b → pedestal iron core 13 → N utmost point of pole parts 14a → wire rope 1 → S utmost point of the N utmost point.
Produce leakage magnetic flux from the wire rope that is magnetized 1, and detect this leakage magnetic flux, thereby whether the steel wire of wire rope 1 the fracture diagnosis of detecting a flaw has been taken place according to this testing result by magnetic flux detecting unit 3.
Followingly diagnostic method is described with reference to Fig. 3 to Fig. 5.
Shown in Fig. 3 (a) and Fig. 3 (b), wire rope 1 is made of many (among the figure being 6) strand 1b, and these strands are formed by many (among the figure being 7) steel wire 1a twisteds.There is the jog that is caused by strand 1b in the surface of wire rope 1.When in the longitudinal direction wire rope 1 being magnetized, the concavo-convex place that forms on the surface of wire rope 1 can produce leakage magnetic flux 8a (among the figure, the leakage magnetic flux that 9 expressions produce because of breaking portion).
For example, when normal (steel wire that does not the have fracture location) wire rope 1 of diagnosis, its detection waveform as shown in Figure 4.Fig. 4 is the position and curve map from concerning between the size of the leakage magnetic flux of wire rope 1 generation of the length direction of expression wire rope 1.As shown in Figure 4, by concavo-convexly periodically forming that strand causes, so leakage magnetic flux changes in the mode corresponding to this concavo-convex interval (cycle).
On the other hand, when the diagnosis steel wire has produced the wire rope 1 of fracture, as shown in Figure 5, in detected leakage magnetic flux, with fracture place corresponding position on produce bigger displacement.That is to say that in detected waveform, the waveform of breaking portion overlaps with the waveform of certain intervals partly.Therefore, when in magnetic flux detecting unit 3 detected waveforms, the displacement of acyclic very big (precipitous) having taken place, can know that steel wire in this position fracture has taken place.
But the size of Fig. 4 and leakage magnetic flux shown in Figure 5 is different because of the difference of the size (magnetic flux) of the magnetic flux by wire rope 1.In this failure detector 10, sept 5 is arranged between guiding device 2 and the magnetization unit 4 as the magnetic flux adjustment unit, so that adjust magnetic flux by wire rope 1 with sept 5.
Followingly leakage magnetic flux is described with reference to Fig. 6 and Fig. 7.
As shown in Figure 6, when the magnetic flux of wire rope 1 emission (magnetic flux that is discharged by magnetization unit 4) is big, the magnetic flux 8b that does not enter wire rope 1 leak into wire rope around.At this moment, when the leakage magnetic flux at position of fracture has taken place the steel wire that detects the wire rope near surface,, therefore be difficult to detect the fracture of invar silk and the leakage magnetic flux that causes because the leakage magnetic flux 9 that causes because of fracture mixes with magnetic flux 8b.That is to say, because the leakage magnetic flux on wire rope 1 surface is big, so diminish in detected leakage magnetic flux 8b in place and the missionary society between the detected leakage magnetic flux 9 of breaking portion that fracture does not take place.
Thus, the leakage magnetic flux that causes for the ease of the fracture that identifies the invar silk need be adjusted the magnetic flux that enters wire rope 1.
But the magnetic flux that discharges from the pole surface 4a of magnetization unit 4 can all not enter the wire rope 1, and wherein a part is released in the air.Be specifically, when using the magnetization unit 4 of U font as shown in Figure 1, shown in Fig. 7 (a), when the pole surface 4a of magnetization unit 4 and the close together between the wire rope 1, the magnetic flux that discharges from magnetization unit 4 all enters the wire rope 1 that remains on the guiding device 2.
On the other hand, shown in Fig. 7 (b), when the pole surface 4a of magnetization unit 4 and the distance between the wire rope 1 were far away, the magnetic flux that discharges from pole parts 14 did not all enter into wire rope 1, and the magnetic flux that does not enter in the wire rope 1 then returns magnetization unit 4 after the transmission aloft.
That is to say, the magnetic flux that discharges from magnetization unit 4, enter the magnetic flux of wire rope 1
(by the magnetic flux of wire rope 1) changes according to the variation of the distance between wire rope 1 and the magnetization unit 4, distance between wire rope 1 and the magnetization unit 4 is big more, does not then enter in the wire rope 1 and to be released to the magnetic flux of getting back to magnetization unit 4 after aerial big more.
At this moment, change the pole surface 4a of magnetization unit 4 and the distance between the wire rope 1, adjust magnetic flux thus by wire rope 1 by the thickness of adjusting sept 5.
In addition, the magnetic flux by wire rope 1 also can change because of the magnetic resistance that wire rope 1 is had.For example, when the gauge of wire (thickness) that constitutes wire rope 1 equated, the ratio of the steel wire in the wire rope section was big more, and the magnetic resistance of wire rope 1 is less, and magnetic flux more easily passes through.When the ratio of the steel wire in the section of wire rope 1 is identical, the gauge of wire that constitutes wire rope 1 is big more, because the border (interface) between steel wire is less, makes the resistance that produces on this border also correspondingly reduce, therefore the magnetic resistance of wire rope 1 is less, and magnetic flux more easily passes through.Therefore, at the less wire rope 1 of magnetic resistance, by the distance between increase wire rope 1 and the pole surface 4a, and at the bigger wire rope 1 of magnetic resistance, then adapt by the magnetic flux that reduces the distance between wire rope 1 and the pole surface 4a, can make to enter wire rope 1 and the magnetic resistance of wire rope 1.
In addition, as shown in Figure 5, the variation of the leakage magnetic flux 9 that causes because of the variation and the fracture of invar silk of the concavo-convex leakage magnetic flux 8a that causes of strand 1b is compared, the fracture of invar silk and the variation of the leakage magnetic flux 9 that causes is bigger.Therefore, more after a little while, breaking portion more easily produces leakage magnetic flux at the magnetic flux that passes through wire rope 1.But,, also can increase from wire rope 1 integral body (strand concavo-convex) leaked magnetic flux along with the magnetic flux by wire rope 1 increases.And, when the magnetic flux by wire rope 1 is excessive, all can increase from the breaking portion leaked magnetic flux of steel wire and from the jog leaked magnetic flux of strand 1b.Therefore, by the pole surface 4a of qualification magnetization unit 4 and the distance between the wire rope 1 (guiding device 2), the magnetic flux that enters wire rope 1 is adjusted, make that the detected concavo-convex leakage magnetic flux that causes by strand 1b is less, and detected bigger from the breaking portion leaked magnetic flux, then can detect the magnetic flux that leaks out from breaking portion with the sensitivity of the best.
Therefore, in advance according to the kind of each wire rope, determine the distance between magnetization unit and the wire rope (guiding device), feasible magnetic flux by wire rope 1 can reach suitable degree, and,, prepare to be used for the sept 5 of various wire rope 1 respectively according to the kind of various wire rope 1 according to determined distance, so that when the flaw detection diagnosis of carrying out wire rope 1, suitably select to use and the corresponding sept of this wire rope kind.Thus, can carry out high-precision wire rope flaw detection diagnosis easily.
In addition, when diagnosing multiple wire rope respectively, if wish to come the leakage magnetic flux of detection of broken part with identical threshold value, then can adjust distance between magnetization unit 4 and the wire rope 1 according to the thickness of sept, make because of the concavo-convex leakage magnetic flux that causes of strand 1b equal.
More than, according to the failure detector 10 of present embodiment,, adjustment unit adjusts magnetic flux by wire rope 1 by being set, can carry out high-precision flaw detection diagnosis according to kind as the wire rope of diagnosis object.
Especially in the failure detector 10 of present embodiment, change the thickness that is arranged on the sept 5 between magnetization unit 4 and the guiding device 2 according to the kind of wire rope 1, therefore can change the distance between wire rope 1 and the magnetization unit 4 easily.And, only need pre-determine the thickness of sept 5, and guiding device 2 is fixed on the magnetization unit 5 by this sept 5, make no matter how the kind of wire rope all can keep equal from breaking portion leaked magnetic flux amount, then can detect a flaw diagnosis and can not be subjected to the influence of wire rope kind with identical standard.
The failure detector 10 of present embodiment can be applicable to the wire rope of any kind of, but normally used wire rope all has certain specification (for example number of share of stock of the radical of steel wire, diameter and strand etc.), so, if be ready to the sept of various volumes (thickness) according to these specifications, then when carrying out the wire rope flaw detection diagnosis, only need to select sept, just can carry out high-precision diagnosis according to kind as the wire rope of diagnosis object.
In the present embodiment, be configured to suitably select the thickness of sept 5 according to the kind of various wire rope 1, so that the distance between magnetization unit and the guiding device has nothing in common with each other, but also can be arranged to make the thickness of sept certain, and select different spacer material (magnetic susceptibility) according to the kind of various wire rope 1.In addition, sept 5 can be made of nonmagnetic material fully, but as long as comprise the nonmagnetic material of prescribed volume at least, then also can comprise magnetic in the sept 5.In addition, in the present embodiment, magnetization unit 4 is made of iron core (bottom 13 and top iron core part 16) and 2 permanent magnets 15, but also can save iron core and constitute magnetization unit 4 with the permanent magnet of a U font (コ font).And, except permanent magnet, can also use electromagnet to constitute magnetization unit 4.
(the 2nd embodiment)
Followingly describe with reference to the 2nd embodiment of accompanying drawing to preferred implementation of the present invention.
As shown in Figure 8, the basic structure part of the wire-rope flaw detector 30 of present embodiment is roughly the same with above-mentioned failure detector 10 shown in Figure 1, for identical structure division, use the symbolic representation identical with Fig. 1, the difference of present embodiment and embodiment before is, omitted sept shown in Figure 15, between the pole surface 4a of magnetization unit 4 and guiding device 2, be provided with gap (air gap) 31, and can adjust the length in this gap.
That is to say, in the failure detector 30 of present embodiment, between magnetization unit 4 and guiding device 2, be formed with gap 31, and be provided with the mechanism of the gap length that is used for adjusting play 31, constitute the magnetic flux adjustment unit with this mechanism.
Specifically, with the mechanism that can form gap 31 to the mode that gap length is adjusted by constituting in conjunction with pin (protuberance) 32 and engagement groove (otch, recess) 33, be separately positioned on pole parts 14 both sides of magnetization unit 4 in conjunction with pin (protuberance) 32, engagement groove (otch, recess) 33 is respectively formed on the position of covering pole parts 14 of two side portions 12 of guiding device 2, and with combine pin 32 combinations.(among Fig. 8 be 3, i.e. 33a～33c), these a plurality of engagement grooves 33 separate certain interval between mutually, and length separately (length of above-below direction among the figure) difference to be formed with a plurality of engagement grooves 33 with respect to one in conjunction with pin 31.
According to selecting an engagement groove a plurality of engagement grooves 33 of kind on being formed on guiding device of wire rope 1, combine pin 32 combinations on making this engagement groove 33a and being arranged on magnetization unit 4, come the pole surface 4a of regulation magnetization unit 4 and the distance (gap length) between the guiding device 2 with this, and guiding device 2 is fixed on the magnetization unit 4.
And, as shown in Figure 9, when wire rope 1 under the guiding of guiding device 2 on guiding device 2 when mobile, produce the power that wire rope 1 is attracted in the magnetization unit 4, wire rope 1 and guiding device 4 and whole magnetization unit 4 are pushed mutually, and the distance between wire rope 1 and the magnetization unit 4 keeps certain.
At this moment, when the distance between wire rope 1 and the magnetization unit 4 when mistake is far away, the magnetic flux that does not enter wire rope 1 and turn back to magnetization unit 4 increases, when the hypotelorism between wire rope 1 and the magnetization unit 4, the leakage magnetic flux of breaking portion and diminish because of the gap between the concavo-convex leakage magnetic flux that causes of strand, therefore, for the magnetic flux that will enter wire rope 1 is adjusted at best state, select suitable engagement groove 33, determine gap length, make the distance between wire rope 1 and the magnetization unit 4 become optimum distance, so that between guiding device 2 and magnetization unit 4, form gap 31 with best clearance length.
According to the failure detector 30 of present embodiment, come adjusting play length by engagement groove 33 with in conjunction with pin 32, can adjust the magnetic flux that enters wire rope 1 thus, thereby have the effect identical with above-mentioned embodiment.
In addition, in the present embodiment, on magnetization unit 4, be provided with one in conjunction with pin 32, and on guiding device 2, formed a plurality of engagement grooves 33, form a plurality of engagement grooves on the magnetization unit 4, on guiding device, be provided with one in conjunction with pin but also can be arranged in.In addition, in the present embodiment, on magnetization unit 4, be provided with one in conjunction with pin 32, and a plurality of engagement grooves 33 on guiding device 2, have been formed, but also can be arranged on the different position of the height (with the distance between the wire rope 1) each other of magnetization unit 4, be provided with respectively a plurality of in conjunction with pin, on guiding device 2, form an engagement groove simultaneously, in addition, also can be respectively on the position that the height of guiding device 2 differs from one another, form a plurality ofly, form an engagement groove in the side of magnetization unit 4 simultaneously in conjunction with pin.
(the 3rd embodiment)
Below the 3rd embodiment of preferred implementation of the present invention is described.
Shown in Figure 10 (a) and Figure 10 (b), the basic structure of the wire-rope flaw detector 40 of present embodiment is identical with failure detector 20 in the previous embodiment, and difference is, in the present embodiment, as the mechanism that between the pole surface 4a of guiding device 2 and magnetization unit 4, forms the variable-length gap, be provided with the framework 41 (being made of nonmagnetic material) and the guiding device 2 that hold magnetization unit 4 are formed as one, and in this framework 41, magnetization unit 4 adjusted and be fixed on mechanism's (any adjusting mechanism 42 of magnetization unit) on the arbitrary height.That is to say, in the present embodiment, be that any adjusting mechanism 42 of magnetization unit constitutes the magnetic flux adjustment unit by the mechanism that forms the gap with specified gap length.
Specifically, on the inboard 41a of the sidewall of framework 41, install promptly and the slide unit 43 that constitutes of the friction materials with smaller between the magnetization unit 4 by the friction materials with smaller, and magnetization unit 4 is accommodated in the framework 41, make magnetization unit 4 side 4b can with slide unit 43 sliding contacts.And, lower surface in the bottom of magnetization unit 4 is provided with bolt part (male screw portion) 44, allow the bolt hole that bolt part 44 is passed in the formation of the bottom surface of framework 41, bolt part 44 screws togather with the align member (female screw part) 45 that is arranged on the outside bottom surface of framework.Constitute any adjusting mechanism 42 of magnetization unit by bolt part 44 and align member 45.Thus, magnetization unit 4 can be in framework 41 in the vertical direction (short transverse of magnetization unit of wire rope 1, in Figure 10 (a) and Figure 10 (b), be above-below direction) go up smooth sliding, and can be fixed on arbitrarily on position (highly) by the magnetization unit fixed part.
In the present embodiment, by at random adjusting the position that bolt part 44 and align member screw togather (distance L till from the bottom surface of magnetization unit 4 to align member), between the pole surface of magnetization unit and guiding device, form the gap that can keep predetermined distance.
The present embodiment also embodiment with previous is the same, is acting on the power that attracts between magnetization unit and the wire rope on the magnetization unit 4, makes that magnetization unit 4 whole quilts are pushed towards wire rope 1 side.Meanwhile, by being installed in any adjusting mechanism 42 of magnetization unit on magnetization unit 4 and the framework 41, magnetization unit 4 is fixed on the desired position in the framework, so the pole surface 4a of magnetization unit 4 and the distance between the wire rope 1 are maintained at the length of setting.
As mentioned above, in this failure detector, can adjust the pole surface 4a of magnetization unit 4 and the distance between the guiding device 2 by magnetization unit fixed part 42, play with the above-mentioned the 1st and the 2nd embodiment in the identical effect of wire-rope flaw detector.
In the present embodiment, come relative position (gap length) between regulation guiding device 2 and the magnetization unit 4 by bolt part 44 on the pedestal iron core 13 that is arranged on magnetization unit 4 and the align member 45 that is arranged on framework 41 bottom surfaces, but the position that bolt part 44 and align member be set is not limited in this.For example, as modified embodiment of the present embodiment, as shown in figure 11, any adjusting mechanism 42 of magnetization unit can be arranged between the pedestal iron core 13 of the magnetic flux detecting unit 3 that is fixed on guiding device 2 lower surfaces and magnetization unit 4.Specifically, form bolt hole (female screw) on magnetic flux detecting unit 3, the while is at the upper surface installing and locating bolt 46 (pin thread) (head of bolt 46 is fixed) of the pedestal iron core 13 of magnetization unit 4.Thus, magnetization unit 4 is pushed towards the direction of magnetic flux detecting unit 3 by wire rope 1, simultaneously, comes the position of regulation magnetization unit 4 by bolt 46, thereby can form the gap of required separation distance between guiding device 2 and magnetization unit 4.
(the 4th embodiment)
Below the 4th embodiment of preferred implementation of the present invention is described.
As shown in figure 12, the basic structure of the wire-rope flaw detector 50 of present embodiment part is roughly the same with above-mentioned failure detector shown in Figure 1 10, to identical structure division, adopt the symbolic representation identical with Fig. 1, be with the difference of previous embodiment, the failure detector 50 of present embodiment has omitted sept shown in Figure 15, and as the magnetic flux adjustment unit, on the pole parts 51 of magnetization unit 4, be provided with can dismounting yoke.
Be specifically, in the pole parts 51 (51a, 51b) of magnetization unit 4, be respectively arranged with yoke 52 on permanent magnet 15, wherein permanent magnet 15 is fixed on the upper surface at the two ends of the pedestal 13 that is made of yoke (iron core).
The yoke 52 of pole parts 51 is made of yoke middle body 53 and 2 yoke sidepieces 54.Yoke middle body 53 is fixed on the permanent magnet 15, on the surface parallel with wire rope 1 that 2 yoke sidepieces 54 are bonded in this yoke middle body 53 in the mode that can dismantle respectively.Be formed with chimeric tenon 52a mutually on the bonding plane between yoke middle body 53 and the yoke sidepiece 54, on the length direction of wire rope 1, slide, can or install 54 dismountings of yoke sidepiece by making yoke sidepiece 54.In addition, recess 11 chimeric pole surface 4a in the magnetization unit 4 and guiding device 2 form the semicircular cylinder shape by the upper surface of yoke middle body 53 and the upper surface of yoke sidepiece 54.That is to say, in this failure detector 50, when wire rope 1 is directed on guiding device 2, the magnetic circuit of the pole parts 51a of pole parts 51b (yoke middle body 53 → permanent magnet 15) → bottom 13 → N utmost point of pole parts 51a (permanent magnet 15 → yoke middle body 53) → wire rope 1 → S utmost point of the formation N utmost point.
In the failure detector 50 of present embodiment, by installing or dismantle the magnetic resistance that yoke sidepiece 54 changes magnetization unit 4 integral body.When dismantling yoke sidepiece 4, the magnetic resistance of magnetization unit 4 integral body rises, and makes the magnetic flux that enters wire rope 1 reduce thus, on the other hand, when yoke sidepiece 54 is installed,, make the magnetic flux that enters wire rope 1 increase thus because the resistance of magnetization unit 4 integral body descends.Therefore, in this failure detector 50, pull down or install yoke sidepiece 54, can adjust the magnetic flux that enters wire rope 1 thus, so have and the identical effect of above-mentioned the 1st embodiment according to the kind of wire rope 1.
In the present embodiment, by installing between permanent magnet 15 and wire rope 1 or pull down the magnetic resistance that yoke sidepiece 54 changes magnetization unit 4, but the change method of magnetic resistance is not limited in this.For example, also can change magnetic resistance by pedestal (yoke) 13 is divided into a plurality of yokes.
In addition, in the present embodiment, be configured to by installing or pull down yoke sidepiece 54, promptly the volume of the yoke 52 by changing magnetic poles part 51 changes magnetic resistance, but also can be arranged to by adopting the magnetic resistance change device to change magnetic resistance, this magnetic resistance change device for example can be that shape (volume) is identical with yoke sidepiece 54 or bottom 13, but the different magnetic of magnetoconductivity or nonmagnetic material etc.
In above-mentioned the 1st to the 4th embodiment, magnetization unit 4 is made of permanent magnet 4, but also can use electromagnet to replace permanent magnet 15.
And, in above-mentioned the 1st to the 4th embodiment, use sept 5 or yoke 52 to be used as the magnetic flux adjustment unit, the magnetic flux that enters wire rope 1 is adjusted, but also can use electromagnet to be used as magnetization unit 4, magnetize wire rope 1 by adjusting the magnetic flux that produces by electromagnet.When using electromagnet, for example, can adjust the magnetic flux that enters wire rope 1 by adjusting the size of the magnet spool number of turn and electric current.
The present invention is not subjected to the restriction of above-mentioned embodiment, and other various embodiments can also be arranged.
Claims (9)
1. wire-rope flaw detector, this failure detector has magnetization unit and magnetic flux detecting unit, described wire-rope flaw detector is used to detect the damage location of described wire rope, wherein this magnetization unit magnetizes the wire rope that is formed by many steel wire twisteds, this magnetic flux detecting unit detects the leakage magnetic flux of described wire rope, described wire-rope flaw detector is characterised in that
Has the magnetic flux adjustment unit of adjusting by the magnetic flux of described wire rope.
2. wire-rope flaw detector as claimed in claim 1 is characterized in that,
Described wire-rope flaw detector has the guiding device of the described wire rope of guiding, described magnetic flux adjustment unit is arranged on the nonmagnetic material between described guiding device and the described magnetization unit, and described magnetic flux adjustment unit is set to by the volume that changes this nonmagnetic material adjusts described magnetic flux.
3. wire-rope flaw detector as claimed in claim 2 is characterized in that,
Described magnetic flux adjustment unit is the sept that is used for adjusting distance between the pole surface of described guiding device and described magnetization unit.
4. wire-rope flaw detector as claimed in claim 3 is characterized in that,
Described magnetization unit is a permanent magnet, and thickness is arranged between the pole surface and described guiding device of described permanent magnet according to the sept that the kind of described wire rope is predetermined.
5. wire-rope flaw detector as claimed in claim 1 is characterized in that,
Described wire-rope flaw detector has the guiding device of the described wire rope of guiding, between this guiding device and described magnetization unit, be formed with the gap, described magnetic flux adjustment unit is arranged on described magnetization unit and the described guiding device, is the mechanism that is used for adjusting the gap length in described gap.
6. wire-rope flaw detector as claimed in claim 5 is characterized in that,
The mechanism that is used for adjusting described gap length is by one or more engagement groove on that is arranged in described guiding device and the described magnetization unit and be arranged on in described guiding device and the described magnetization unit another one or more and constitute in conjunction with pin, the length of described one or more engagement groove differs from one another, described one or more be arranged in conjunction with pin and described wire rope between the position that has nothing in common with each other of distance on, the described mechanism that is used for adjusting described gap length combines keying and closes with described by making described engagement groove, between described guiding device and described magnetization unit, form the gap of specified gap length, and described guiding device is fixed on the magnetization unit.
7. wire-rope flaw detector as claimed in claim 5 is characterized in that,
Make the framework and the described guiding device that hold described magnetization unit form one, and to the mechanism that described gap length is adjusted is the adjusting mechanism of engage thread, this adjusting mechanism is arranged on described magnetization unit and the described framework, with described magnetization unit adjustment and be fixed on arbitrarily on the height.
8. wire-rope flaw detector as claimed in claim 1 is characterized in that,
Above-mentioned magnetization unit is made of permanent magnet or electromagnet, and above-mentioned magnetic flux adjustment unit is arranged on the yoke on the described magnetization unit, the magnetic resistance that material by changing described yoke or volume are adjusted described magnetization unit.
9. wire-rope flaw detector as claimed in claim 8 is characterized in that,
Described yoke is installed on described permanent magnet or the electromagnet removably.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-299274 | 2007-11-19 | ||
| JP2007299274 | 2007-11-19 | ||
| JP2007299274A JP5031528B2 (en) | 2007-11-19 | 2007-11-19 | Wire rope flaw detector |
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| Publication Number | Publication Date |
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| CN101441196A true CN101441196A (en) | 2009-05-27 |
| CN101441196B CN101441196B (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101812487A Active CN101441196B (en) | 2007-11-19 | 2008-11-18 | Wire rope flaw detection device |
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| Country | Link |
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| JP (1) | JP5031528B2 (en) |
| CN (1) | CN101441196B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5031528B2 (en) | 2012-09-19 |
| CN101441196B (en) | 2011-12-28 |
| JP2009122074A (en) | 2009-06-04 |
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