CN207894729U - A kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field - Google Patents
A kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field Download PDFInfo
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- CN207894729U CN207894729U CN201721912579.4U CN201721912579U CN207894729U CN 207894729 U CN207894729 U CN 207894729U CN 201721912579 U CN201721912579 U CN 201721912579U CN 207894729 U CN207894729 U CN 207894729U
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Abstract
The utility model is a kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field, including rack, rack is " mouth " glyph framework, rotation is equipped with vertical leading screw in one column of rack, it is installed with upright slide rail in another column, vertical leading screw top is connected with motor A, it is combined with vertically movable screw on vertical leading screw, sliding sleeve is arranged on upright slide rail, it is rotatably connected with horizontal screw lead between vertically movable screw and sliding sleeve, static monitoring techniques are equipped with above the chuck of bottom girder to pop one's head in, static monitoring techniques probe is mounted on the framework pillar equipped with vertical leading screw, the column top rotating shaft of rack, shaft one end, which is stretched out outside column, is connected with motor C, runner is arranged in shaft, runner is affixed with shaft, rotor periphery is equipped with the grooving that can be put into steel wire rope, dynamic monitoring is popped one's head in there are two being set below runner.The utility model leads to the principle of changes of magnetic field by damage of steel cable by is detected, and inspection result accurately and timely, avoids the shortcomings that naked eyes are difficult to observe.
Description
Technical field
The utility model is related to steel wire rope fatigue test technology fields more particularly to a kind of utilization changes of magnetic field to detect fracture of wire
Steel wire rope fatigue experimental device.
Background technology
Steel wire rope is that mechanical property and the satisfactory steel wire of geometric dimension are twisted together according to certain rule
Helical form steel tendon is a kind of widely used stressed member, is typically used as in material carrying machine, for promotion, traction, tension
It is used with carrying.The failure mode of steel wire rope, which is mainly fatigue, leads to steel wire fracture, therefore, fatigue test is carried out to steel wire rope,
To determine that its fatigue life is just particularly important.When steel wire rope carries out fatigue test, steel wire rope tension load can be generally carried out
Experiment, current tensile test equipment can only often carry out single situation simulation when carrying out tension test；Inner wire is tired
Labor fracture is difficult to detect by an unaided eye sometimes.
Invention content
The utility model aims to solve the problem that the deficiencies in the prior art, and provides a kind of steel wire detecting fracture of wire using changes of magnetic field
Rope fatigue experimental device.
The utility model to achieve the above object, using following technical scheme：It is a kind of to detect fracture of wire using changes of magnetic field
Steel wire rope fatigue experimental device, including rack, rack are " mouth " glyph framework, are rotated in a column of rack and are equipped with vertical thread
Thick stick is installed with upright slide rail in another column, and vertical leading screw top is connected with motor A, is combined on vertical leading screw vertically movable
Screw is arranged with sliding sleeve on upright slide rail, and vertically movable screw and sliding sleeve can move up and down in column, vertically movable screw and
Be rotatably connected with horizontal screw lead between sliding sleeve, horizontal screw lead one end, which passes through, is connected with motor B after vertically movable screw, motor B with it is vertical
Mobile screw is fixedly connected, and transverse shifting screw is combined on horizontal screw lead, chuck is connected on transverse shifting screw, rack
Also fixed on bottom girder there are one chucks, and the chuck on bottom girder is located at one end of close vertical leading screw, removably blocks in chuck
Static monitoring techniques can be equipped with and be popped one's head in by the sleeve of steel wire rope to be tested, the chuck top of bottom girder by having, and static monitoring techniques probe is mounted on
On framework pillar equipped with vertical leading screw, the column top rotating shaft of rack, shaft one end, which is stretched out outside column, is connected with motor C,
Runner is arranged in shaft, runner is affixed with shaft, and rotor periphery is equipped with the grooving that can be put into steel wire rope, and two are equipped with below runner
A dynamic monitoring probe, two dynamic monitoring probes are located at runner front and rear sides, and dynamic monitoring probe is installed on equipped with perpendicular
On the framework pillar of straight sliding rail, be respectively equipped on the dynamic monitoring probe lower section and rack bottom girder on rear side of runner travel switch A and
The line of travel switch B, travel switch A and travel switch B are vertical, and steel wire rope is wound on from top on runner, under steel wire rope both ends
It hangs down and respectively connects there are one clump weight, the clump weight of rear side can touch travel switch A and travel switch B, travel switch A and row respectively
Cheng Kaiguan B are electrically connected with motor C, and chuck is located on front side of runner, and static monitoring techniques probe and dynamic monitoring probe are referred to as monitoring and visit
Head, monitoring probe include Hall sensor for detecting rate of change of magnetic and are connected with constant voltage dc source and are used to generate magnetic
The electromagnet coil of field, Hall sensor are mounted on one end of electromagnet coil, and monitoring probe is connected with data processing equipment, data
Amplifier that processing unit includes microcontroller, is connected with Hall sensor and is amplified to Hall sensor signal and with list
What piece machine was connected is used to receive the A/D converter from amplifier electric signal and is connect with microcontroller and be used for the aobvious of display waveform
Show device.
Motor C is AC induction motor, further includes in the control circuit that travel switch A and travel switch B are connect with motor C
Starting switch, positive contactor, the reversion contactor and time relay, when clump weight touches travel switch A and stroke is opened respectively
When closing B, clump weight is contacted with the moving together contact of travel switch A and travel switch B respectively, the dynamic circuit connector main contact of positive contactor
The ends A/B/C are connect with the A of AC induction motor phases/B phases/C circuitry phases respectively, invert the A/B/C of the dynamic circuit connector main contact of contactor
End is connect with the C of AC induction motor phases/B phases/A circuitry phases respectively, and starting switch switchs for normally opened dynamic circuit connector, starting switch, row
The moving together contact of Cheng Kaiguan A, the break contact of travel switch B, invert contactor break contact and positive contactor attraction
Coil is connected, and starting switch is in parallel with the dynamic circuit connector auxiliary contact of positive contactor after connecting with the moving together contact of travel switch A；Row
The moving together contact of Cheng Kaiguan B, the moving together contact of timing closing of the delay pull-in winding of the time relay, the time relay, row
The sucking coil series connection of the break contact of Cheng Kaiguan A, the break contact of positive contactor and reversion contactor, travel switch B's
Moving together contact connect with the delay pull-in winding of the time relay after with reversion the dynamic circuit connector auxiliary contact of contactor it is in parallel, it is above-mentioned from
The series circuit of starting switch to the sucking coil of positive contactor is contacted with the above-mentioned moving together contact from travel switch B to reversion
After the series circuit parallel connection of the sucking coil of device, one end is contacted with the ends A of the dynamic circuit connector main contact of positive contactor and reversion respectively
The C-terminal of the dynamic circuit connector main contact of device connects, the other end respectively with the ends B of the dynamic circuit connector main contact of reversion contactor and positive contactor
The ends B of dynamic circuit connector main contact connect.
Motor C is mounted on the column of the rack equipped with upright slide rail.
Upright slide rail is hexagonal prisms sliding rail.
The number of turns of electromagnet coil is n=2Ur/Kμ0μrI,
Wherein：N is the number of turns of electromagnet coil；
UrFor the median of Hall sensor output voltage active section, Hall sensor output voltage active section is located at Hall
The linear zone of sensor voltage output characteristic curve；
K is Hall coefficient；
μ0For the magnetic conductivity of air；
μrFor the magnetic conductivity of steel wire rope；
I is the electric current for being passed through electromagnet coil.
Principle using magnetic field detection steel wire rope fatigue damage is：The transformational relation of Hall sensor is：UH=KB, formula
In, UHFor Hall voltage, K is Hall coefficient, and B is magnetic field intensity；
Stable DC I is passed through in electromagnet coil, obtaining the magnetic field intensity at Hall sensor is：
B=0.5 μ0μrNI, wherein n is the number of turns of electromagnet coil, μ0For the magnetic conductivity of air；μrFor the magnetic of steel wire rope
Conductance；
Similarly it is found that UH=0.5K μ0μrnI；
Since stable DC I and electromagnet coil the number of turns n is definite value, it is known that：
ΔUH=(0.5K μ0nI)Δμr=K ' Δs μr；
When steel wire rope fatigue damage, inner wire fracture, magnetic permeability μrIt can change, then Hall sensor output electricity
Press UHAlso it can accordingly change, i.e., by detecting Hall sensor output voltage UHVariation, realization whether steel wire rope is occurred
The detection of fatigue damage.
The utility model has the beneficial effects that：The utility model by damage of steel cable leads to the principle of changes of magnetic field into
Row detection, inspection result accurately and timely, avoid the shortcomings that naked eyes are difficult to observe；Two chucks can be pressed from both sides directly after removing sleeve
Tight steel wire rope carries out static stretch test；Steel wire rope is wound on runner and after connecting clump weight, starts motor C, with motor
The positive and negative rotation of C can then carry out dynamic tensile test, avoid the single problem of test case, and the card on transverse shifting screw
After disk loads onto sleeve, also transverse shifting screw can be moved to suitable position, by steel wire penetrating sleeve, chuck can play at this time
The effect of guiding.
Description of the drawings
Fig. 1 is front view when the utility model carries out dynamic tensile test；
Fig. 2 is the A-A sectional views of Fig. 1；
Fig. 3 is front view when the utility model carries out static stretch test；
Fig. 4 is the schematic diagram of travel switch A and travel switch B and the motor C control circuits connecting；
In figure：1- motors A；2- racks；3- sliding rails；4- shafts；5- motors C；6- runners；7- sliding sleeves；8- chucks；9- dynamics
Monitoring probe；10- travel switches A；11- clump weights；12- steel wire ropes；13- travel switches B；14- static monitoring techniques are popped one's head in；15- is perpendicular
Raw silk rings thick stick；16- horizontal screw leads；The vertically movable screws of 17-；18- motors B；The dynamic circuit connector main contact of the positive contactors of 19-；20- is inverted
The dynamic circuit connector main contact of contactor；21- starting switches；The dynamic circuit connector auxiliary contact of the positive contactors of 22-；The dynamic circuit connector of 23- travel switches A
Contact；The break contact of 24- travel switches B；25- inverts the break contact of contactor；The sucking coil of the positive contactors of 26-；
27- inverts the sucking coil of contactor；The break contact of the positive contactors of 28-；The break contact of 29- travel switches A；When 30-
Between relay timing closing moving together contact；The delay pull-in winding of the 31- time relays；The dynamic circuit connector of 32- travel switches B is touched
Point；33- inverts the dynamic circuit connector auxiliary contact of contactor；
Attached drawing in the utility model is all schematic diagram, and size and relative scale do not represent actual size；
It is described in detail with reference to attached drawing below with reference to the embodiments of the present invention.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples：
As shown in Figure 1 to 4, a kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field, including rack
2, rack 2 is " mouth " glyph framework, is rotated in a column of rack 2 and is equipped with vertical leading screw 15, is installed in another column
Upright slide rail 3,15 top of vertical leading screw are connected with motor A1, vertically movable screw 17, upright slide rail 3 are combined on vertical leading screw 15
On be arranged with sliding sleeve 7, vertically movable screw 17 and sliding sleeve 7 can move up and down in column, vertically movable screw 17 and sliding sleeve 7 it
Between be rotatably connected with horizontal screw lead 16,16 one end of horizontal screw lead, which passes through, is connected with motor B18 after vertically movable screw 17, motor B18 with
Vertically movable screw 17 is fixedly connected, and transverse shifting screw is combined on horizontal screw lead 16, card is connected on transverse shifting screw
Disk 8, also fixed on the bottom girder of rack 2 there are one chucks 8, and the chuck 8 on bottom girder is located at close to one end of vertical leading screw 15, card
Removably card has and can be equipped with static monitoring techniques by the sleeve of steel wire rope 12 to be tested, 8 top of chuck of bottom girder and pop one's head in disk 8
14, static monitoring techniques probe 14 is mounted on 2 column of rack equipped with vertical leading screw 15, the column top rotating shaft 4 of rack 2,
4 one end of shaft, which is stretched out outside column, is connected with motor C5, runner 6 is arranged in shaft 4, runner 6 and shaft 4 are affixed, and 6 periphery of runner is set
The grooving of steel wire rope 12 can be put by having, and 6 lower section of runner is set there are two dynamic monitoring probe 9, and two dynamic monitorings probes 9 distinguish positions
In 6 front and rear sides of runner, dynamic monitoring probe 9 is installed on 2 column of rack equipped with upright slide rail 3, the dynamic of 6 rear side of runner
It is respectively equipped with travel switch A10 and travel switch B13, travel switch A10 and stroke on 9 lower section of monitoring probe and 2 bottom girder of rack
The line of switch B13 is vertical, and steel wire rope 12 is wound on from top on runner 6, and 12 both ends of steel wire rope are sagging and respectively connect there are one counterweight
The clump weight 11 of block 11, rear side can touch travel switch A10 and travel switch B13, travel switch A10 and travel switch respectively
B13 is electrically connected with motor C5, and chuck 8 is located at 6 front side of runner, and static monitoring techniques probe 14 and dynamic monitoring probe 9 are referred to as monitoring
Probe, monitoring probe include Hall sensor for detecting rate of change of magnetic and are connected with constant voltage dc source and are used to generate
The electromagnet coil in magnetic field, Hall sensor are mounted on one end of electromagnet coil, and monitoring probe is connected with data processing equipment, number
The amplifier that includes microcontroller according to processing unit, be connected with Hall sensor and Hall sensor signal is amplified and with
What microcontroller was connected is used to receive the A/D converter from amplifier electric signal and connect with microcontroller and be used for display waveform
Display.
Motor C5 is AC induction motor, in the control circuit that travel switch A10 and travel switch B13 are connect with motor C5
Further include starting switch 21, positive contactor, reversion contactor and the time relay, when clump weight 11 touches travel switch respectively
When A10 and travel switch B13, clump weight 11 is contacted with the moving together contact 32 of travel switch A10 and travel switch B respectively, is rotated forward
The ends A/B/C of the dynamic circuit connector main contact 19 of contactor are connect with the A of AC induction motor phases/B phases/C circuitry phases respectively, reversion contact
The ends A/B/C of the dynamic circuit connector main contact 20 of device are connect with the C of AC induction motor phases/B phases/A circuitry phases respectively, and starting switch 21 is
Normally opened dynamic circuit connector switch, starting switch 21, the moving together contact 23 of travel switch A, the break contact 24 of travel switch B, reversion contact
The break contact 25 of device and the sucking coil 26 of positive contactor are connected, the moving together contact 23 of starting switch 21 and travel switch A
It is in parallel with the dynamic circuit connector auxiliary contact 22 of positive contactor after series connection；The delay of the moving together contact 32, the time relay of travel switch B
The moving together contact 30 of the timing closing of pull-in winding 31, the time relay, the break contact 29 of travel switch A, positive contactor
Break contact 28 and the sucking coil 27 of reversion contactor connect, the moving together contact 32 of travel switch B and the time relay
The pull-in winding 31 that is delayed is in parallel with the reversion dynamic circuit connector auxiliary contact 33 of contactor after connecting, above-mentioned from starting switch 21 to positive switching
The series circuit of the sucking coil 26 of tentaculum and the above-mentioned moving together contact 32 from travel switch B to the sucking coil of reversion contactor
After 27 series circuit parallel connection, one end respectively with the ends A of the dynamic circuit connector main contact 19 of positive contactor and invert contactor dynamic circuit connector
The C-terminal of main contact 20 connects, the other end respectively with the ends B of the dynamic circuit connector main contact 20 of reversion contactor and the dynamic circuit connector of positive contactor
The ends B of main contact 19 connect.
Motor C5 is mounted on the column of the rack 2 equipped with upright slide rail 3.
Upright slide rail 3 is hexagonal prisms sliding rail 3.
The number of turns of electromagnet coil is n=2Ur/Kμ0μrI,
Wherein：N is the number of turns of electromagnet coil；
UrFor the median of Hall sensor output voltage active section, Hall sensor output voltage active section is located at Hall
The linear zone of sensor voltage output characteristic curve；
K is Hall coefficient；
μ0For the magnetic conductivity of air；
μrFor the magnetic conductivity of steel wire rope；
I is the electric current for being passed through electromagnet coil.
Microcontroller used is the MCS51 series monolithics of INTEL Corp..
When carrying out static stretch test, 8 direct clamping steel wire rope 12 of chuck, electricity are used after the sleeve in chuck 8 is removed
Machine A1 rotations drive vertically movable screw 17 to rise, to make steel wire rope 12 tighten, 14 monitoring steel wire rope 12 of static monitoring techniques probe
Whether fatigue fracture is occurred；When carrying out dynamic tensile test, after steel wire rope 12 is wound on runner 6 and connects clump weight 11,
Start motor C5, can then carry out dynamic tensile test with the positive and negative rotation of motor C5, avoid the single problem of test case,
And after the chuck 8 on transverse shifting screw loads onto sleeve, also transverse shifting screw can be moved to suitable position, by steel wire rope 12
Across sleeve, chuck 8 can play the role of guiding at this time.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, if the various improvement of the methodology and technical solution progress of the utility model are used, or without
Improvement directly applies to other occasions, both is within the protection scope of the present invention.
Claims (3)
1. a kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field, which is characterized in that including rack (2), machine
Frame (2) is " mouth " glyph framework, is rotated in a column of rack (2) and is equipped with vertical leading screw (15), fixed in another column
There are upright slide rail (3), vertical leading screw (15) top to be connected with motor A (1), vertically movable screw is combined on vertical leading screw (15)
(17), sliding sleeve (7) is arranged on upright slide rail (3), vertically movable screw (17) and sliding sleeve (7) can move up and down in column,
Horizontal screw lead (16) is rotatably connected between vertically movable screw (17) and sliding sleeve (7), horizontal screw lead (16) one end passes through vertical move
It is connected with motor B (18) after dynamic screw (17), motor B (18) is fixedly connected with vertically movable screw (17), on horizontal screw lead (16)
It is combined with transverse shifting screw, is connected with chuck (8) on transverse shifting screw, also fixed on the bottom girder of rack (2) there are one cards
Disk (8), and the chuck (8) on bottom girder is located at close to one end of vertical leading screw (15), the interior removably card of chuck (8) has and can pass through
The sleeve of steel wire rope (12) to be tested, chuck (8) top of bottom girder are equipped with static monitoring techniques and pop one's head in (14), and static monitoring techniques pop one's head in (14)
On rack (2) column equipped with vertical leading screw (15), the column top rotating shaft (4) of rack (2), shaft (4) one
End, which is stretched out outside column, is connected with motor C (5), runner (6) is arranged in shaft (4), runner (6) and shaft (4) are affixed, runner (6)
Periphery is equipped with the grooving that can be put into steel wire rope (12), is set below runner (6) there are two dynamic monitoring probe (9), two dynamics are supervised
Probing head (9) is located at runner (6) front and rear sides, and dynamic monitoring probe (9) is installed on the rack equipped with upright slide rail (3)
(2) on column, travel switch A is respectively equipped with below the dynamic monitoring probe (9) on rear side of runner (6) and on rack (2) bottom girder
(10) and the line of travel switch B (13), travel switch A (10) and travel switch B (13) are vertical, steel wire rope (12) from top around
On runner (6), steel wire rope (12) both ends are sagging and respectively connect there are one clump weight (11), and the clump weight (11) of rear side can touch respectively
Travel switch A (10) and travel switch B (13) are touched, travel switch A (10) and travel switch B (13) are electrically connected with motor C (5),
Chuck (8) is located on front side of runner (6), and static monitoring techniques probe (14) and dynamic monitoring probe (9) are referred to as monitoring probe, and monitoring is visited
Head includes Hall sensor for detecting rate of change of magnetic and is connected and is used to generate the electromagnetism in magnetic field with constant voltage dc source
Iron coil, Hall sensor are mounted on one end of electromagnet coil, and monitoring probe is connected with data processing equipment, data processing equipment
It is connected including microcontroller, with Hall sensor and amplifier that Hall sensor signal is amplified and is connected with microcontroller
For receiving the A/D converter from amplifier electric signal and connecting and be used for the display of display waveform with microcontroller.
2. the steel wire rope fatigue experimental device according to claim 1 for detecting fracture of wire using changes of magnetic field, which is characterized in that
Motor C (5) is mounted on the column of the rack (2) equipped with upright slide rail (3).
3. the steel wire rope fatigue experimental device according to claim 1 for detecting fracture of wire using changes of magnetic field, which is characterized in that
Upright slide rail (3) is hexagonal prisms sliding rail (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721912579.4U CN207894729U (en) | 2017-12-30 | 2017-12-30 | A kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721912579.4U CN207894729U (en) | 2017-12-30 | 2017-12-30 | A kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207894729U true CN207894729U (en) | 2018-09-21 |
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ID=63551324
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721912579.4U Active CN207894729U (en) | 2017-12-30 | 2017-12-30 | A kind of steel wire rope fatigue experimental device detecting fracture of wire using changes of magnetic field |
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| CN (1) | CN207894729U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261229A (en) * | 2019-06-21 | 2019-09-20 | 杨振民 | A kind of intelligent kind of motor vehicle lifting testing device for wire ropes |
-
2017
- 2017-12-30 CN CN201721912579.4U patent/CN207894729U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261229A (en) * | 2019-06-21 | 2019-09-20 | 杨振民 | A kind of intelligent kind of motor vehicle lifting testing device for wire ropes |
| CN110261229B (en) * | 2019-06-21 | 2021-09-14 | 安徽永利建设工程有限公司 | Intelligent detection device for hoisting steel wire rope of motor vehicle |
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