CN207408211U - Gapless rail temperature stress calibrating platform based on metal magnetic memory technique - Google Patents
Gapless rail temperature stress calibrating platform based on metal magnetic memory technique Download PDFInfo
- Publication number
- CN207408211U CN207408211U CN201721419581.8U CN201721419581U CN207408211U CN 207408211 U CN207408211 U CN 207408211U CN 201721419581 U CN201721419581 U CN 201721419581U CN 207408211 U CN207408211 U CN 207408211U
- Authority
- CN
- China
- Prior art keywords
- rail
- test specimen
- compression test
- magnetic memory
- metal magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a kind of gapless rail temperature stress calibrating platform based on metal magnetic memory technique, it includes the metal magnetic memory testing instrument of rail compression test specimen, 3 grades of standard force-measuring rings, the horizontal universal testing machine that the rail compression test specimen is stretched or compressed, the rail latch assembly of the fixed rail compression test specimen and the detection rail compression test specimen；3 grades of standard force-measuring rings are mounted on one of reinforcing end of the horizontal universal testing machine, and the rail compression test specimen both ends connect another reinforcing end of the horizontal universal testing machine and 3 grades of standard force-measuring rings respectively.The generation of the accurate simulation Railroad's Temperature Stress of gapless rail temperature stress calibrating platform energy based on metal magnetic memory technique, establish the relation output and input, magnetic memory signal under different temperatures stress is demarcated, completes the calibration of the indexs such as the sensitivity of metal magnetic memory testing instrument, linear, repeatability.
Description
Technical field
The utility model belongs to sensing analysis and measurement control field, and in particular to a kind of based on metal magnetic memory technique
Gapless rail temperature stress calibrating platform.
Background technology
Gapless rail can realize railway high speed, heavy duty, be widely used.The reduction of the seam of rail is saved
Joint part, reduces the vibrations of train, but is also constrained because of the disappearance of rail gap be subject to pressing plate resistance and ballast resistance, when
When rail temperature changes, rail, which expands with heat and contract with cold, can generate temperature stress.Summer high temperature, rail inside can form compression, easily
Generation rail expansion phenomenon, winter low temperature can form tensile stress inside rail, easily occur broken rail phenomenon, this serious threat train
Reliability of operation and security.
Traditional gapless rail temperature stress detection is all to use ultrasonic wave, X-ray, magnetic powder inspection etc., due to its operation
Complexity is severely limited when detecting large scale equipment and long length structural member, recently as metal magnetic memory test
It rises, designs a kind of calibrating platform of the Railroad's Temperature Stress based on metal magnetic memory technique and have important practical significance.
Utility model content
The purpose of this utility model is provided a kind of based on metal magnetic memory technique using upper deficiency for the prior art
Gapless rail temperature stress calibrating platform.
To achieve these goals, technical solution is used by the utility model：
A kind of gapless rail temperature stress calibrating platform based on metal magnetic memory technique, it includes rail compression test specimen, 3
Grade standard force-measuring ring, the horizontal universal testing machine that the rail compression test specimen is stretched or compressed, the fixed rail are drawn
It presses the rail latch assembly of test specimen and detects the metal magnetic memory testing instrument of the rail compression test specimen magnetic field intensity；The rail
The both ends of compression test specimen are equipped with square connecting portion, and 3 grades of standard force-measuring rings are mounted on the horizontal universal testing machine wherein
One reinforcing end, the square connection portion at the both ends of the rail compression test specimen do not connect the another of the horizontal universal testing machine
A reinforcing end and 3 grades of standard force-measuring rings.
Based on above-mentioned, the rail latch assembly includes concrete sleeper, two be arranged on the rail test specimen absolutely
Edge track gauge block, two springs and clamping screw being adapted with the Insulation rail distance keeper, the foot limit of the rail compression test specimen
System is between two pieces of Insulation rail distance keepers, and the spring is pressed on the foot and the Insulation rail distance keeper, the locking screw
Bolt is through the spring and the Insulation rail distance keeper and is threaded on the concrete sleeper.
Based on above-mentioned, the length of the rail compression test specimen is 35~40 cm.
Based on above-mentioned, the spring is ω shape springs, and the ω shapes spring integrally bending causes the outer of the ω shapes spring
On the Insulation rail distance keeper, the inner end of the ω shapes spring is pressed on the foot side pressure.
Above-mentioned calibrating platform application method comprises the following steps：
1）Experiment room temperature is adjusted to fastening-down temperature of rail, the rail compression test specimen is fixed on the rail latch assembly
On the concrete sleeper it is made not shift, 3 grades of standard force-measuring rings are fixed on the horizontal universal testing machine
One of reinforcing end, the square connection portion at the rail compression test specimen both ends do not connect the another of the horizontal universal testing machine
One reinforcing end and 3 grades of standard force-measuring rings, the sensor of the metal magnetic memory testing instrument are positioned over the rail tension and compression
At the both sides web of the rail of test specimen；
2）The Zero calibration of magnetic memory detector is done in the case where the rail compression test specimen does not stress state first.Again from zero
Start, manipulate the horizontal universal testing machine to the horizontal tension and compression of the rail compression test specimen carry out, the force value of calibration is by described 3 grades
Standard force-measuring ring is directly read, and (drawings) load of pressurizeing every time is incremented by fixed value, up to limiting value, while by the metal magnetic memory
The sensor of detector be positioned over the rail test specimen or both sides magnetic field intensity is measured, record corresponding data；According to
The data set up rail stress and the corresponding mathematical model of magnetic field intensity.
The utility model compared with the prior art have substantive distinguishing features and progress, specifically, the utility model have with
Lower advantage：
Gapless rail temperature stress calibrating platform provided by the utility model based on metal magnetic memory technique is simple in structure,
Easy to operate, magnetic memory detector static sensitivity, linear, repetition are completed in the generation of the accurate simulation Railroad's Temperature Stress of energy
The calibration of the indexs such as property, hysteresis.And rail stress and the corresponding mathematical model of magnetic field intensity can be set up according to test data, it looks for
Go out correspondence therein, demarcate magnetic field intensity under different temperatures stress, the relation output and input is established, to use metallic magnetic
Memory technique quantitatively detects Railroad's Temperature Stress and lays the foundation.
Description of the drawings
Fig. 1 is the structure of the gapless rail temperature stress calibrating platform based on metal magnetic memory technique in the utility model
Schematic diagram.
In figure：1. horizontal universal testing machine；2. concrete sleeper；3. rail compression test specimen；4. metal magnetic memory test
Instrument；5. Insulation rail distance keeper；6. 3 grades of standard force-measuring rings.
Specific embodiment
Below by specific embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of gapless rail temperature stress calibrating platform based on metal magnetic memory technique, it includes rail
3,3 grades of standard force-measuring rings 6 of compression test specimen, the horizontal universal testing machine 1 that the rail compression test specimen 3 is stretched or compressed,
The rail latch assembly of the fixed rail compression test specimen 3 and the metallic magnetic note for detecting 3 magnetic field intensity of rail compression test specimen
Recall detector 4.
The material and shape of 3 main part of rail compression test specimen are identical with actual rail, crouch for convenience with described
The reinforcing end of formula universal testing machine 1 and 3 grades of standard force-measuring rings 6 are attached, the rail compression test specimen 3 during fabrication,
The both ends of the rail compression test specimen 3 are set to square connecting portion, 3 grades of standard force-measuring rings 6 are mounted on the horizontal universal
One of reinforcing end of testing machine 1, the square connection portion at 3 both ends of rail compression test specimen do not connect the horizontal universal
Another reinforcing end of testing machine 1 and 3 grades of standard force-measuring rings 6.
Further, the rail latch assembly includes concrete sleeper 2, two be arranged on the concrete sleeper 2
Insulation rail distance keeper 5, two springs and clamping screw being adapted with the Insulation rail distance keeper 5, the rail of the rail compression test specimen 3
Foot is limited between two pieces of Insulation rail distance keepers 5, and the spring is pressed on the foot and the Insulation rail distance keeper 5, described
Clamping screw is through the spring and the Insulation rail distance keeper 5 and is threaded on the concrete sleeper 2.
Further, the length of the rail compression test specimen 3 is 35 cm.In other examples, the rail tension and compression examination
The length of part is according to circumstances arranged to 35~40 cm.
Further, the spring is ω shape springs, and the ω shapes spring integrally bending causes the outer end of the ω shapes spring
It is pressed on the Insulation rail distance keeper 5, the inner end of the ω shapes spring is pressed on the foot.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should
Understand：It can still modify to specific embodiment of the present utility model or some technical characteristics are equally replaced
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
Among scope.
Claims (4)
1. a kind of gapless rail temperature stress calibrating platform based on metal magnetic memory technique, it is characterised in that：It includes rail
Compression test specimen, 3 grades of standard force-measuring rings, the horizontal universal testing machine that the rail compression test specimen is stretched or compressed, fixation
The rail latch assembly of the rail compression test specimen and the metal magnetic memory test for detecting the rail compression test specimen magnetic field intensity
Instrument；The both ends of the rail compression test specimen are square connecting portion, and 3 grades of standard force-measuring rings are tested mounted on the horizontal universal
One of reinforcing end of machine, the square connection portion at the rail compression test specimen both ends do not connect the horizontal universal testing machine
Another reinforcing end and 3 grades of standard force-measuring rings.
2. the gapless rail temperature stress calibrating platform according to claim 1 based on metal magnetic memory technique, feature
It is：The rail latch assembly include concrete sleeper, be arranged on the concrete sleeper two Insulation rail distance keepers, with
Two springs and clamping screw that the Insulation rail distance keeper is adapted, the foot of the rail compression test specimen are limited in described in two pieces
Between Insulation rail distance keeper, the spring is pressed on the foot and the Insulation rail distance keeper, and the clamping screw passes through the bullet
Item and the Insulation rail distance keeper are simultaneously threaded on the concrete sleeper.
3. the gapless rail temperature stress calibrating platform according to claim 1 or 2 based on metal magnetic memory technique, special
Sign is：The length of the rail compression test specimen is 35~40 cm.
4. the gapless rail temperature stress calibrating platform according to claim 2 based on metal magnetic memory technique, feature
It is：The spring is ω shape springs, and it is described exhausted that the ω shapes spring integrally bending so that the outer end of the ω shapes spring is pressed in
On edge track gauge block, the inner end of the ω shapes spring is pressed on the foot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721419581.8U CN207408211U (en) | 2017-10-31 | 2017-10-31 | Gapless rail temperature stress calibrating platform based on metal magnetic memory technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721419581.8U CN207408211U (en) | 2017-10-31 | 2017-10-31 | Gapless rail temperature stress calibrating platform based on metal magnetic memory technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207408211U true CN207408211U (en) | 2018-05-25 |
Family
ID=62409037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721419581.8U Expired - Fee Related CN207408211U (en) | 2017-10-31 | 2017-10-31 | Gapless rail temperature stress calibrating platform based on metal magnetic memory technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207408211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578019A (en) * | 2019-09-27 | 2021-03-30 | 北京化工大学 | Early warning method for internal temperature stress concentration of high-speed long steel rail based on surface magnetic flux leakage signal |
-
2017
- 2017-10-31 CN CN201721419581.8U patent/CN207408211U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578019A (en) * | 2019-09-27 | 2021-03-30 | 北京化工大学 | Early warning method for internal temperature stress concentration of high-speed long steel rail based on surface magnetic flux leakage signal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| David-West et al. | A review of structural health monitoring techniques as applied to composite structures | |
| CN109406340A (en) | Hammer the device and method of prepressing type test cartridge connection structure compactness of grouting | |
| Lourenço et al. | Chestnut wood in compression perpendicular to the grain: Non-destructive correlations for test results in new and old wood | |
| CN103308234B (en) | Internal force measuring sensor | |
| Bai et al. | Numerical and experimental study of dynamic buckling behavior of a J-stiffened composite panel under in-plane shear | |
| Peng et al. | Biaxial residual stress measurement by indentation energy difference method: Theoretical and experimental study | |
| Liu et al. | A new device for stress monitoring in continuously welded rails using bi-directional strain method | |
| CN102865952A (en) | Nondestructive testing method for working stress of concrete | |
| CN207020001U (en) | A kind of steel bar welding fitting device for testing tensile strength | |
| CN107014705A (en) | A kind of method and system based on sound characteristic information prediction magnesium alloy sample fatigue limit | |
| CN207408211U (en) | Gapless rail temperature stress calibrating platform based on metal magnetic memory technique | |
| CN106197342A (en) | Fracture width change dynamic monitor based on strain sensing | |
| Bao et al. | Measurements of Young’s and shear moduli of rail steel at elevated temperatures | |
| CN105388210B (en) | Suspension cable damage detection apparatus and detection method based on temporary steel diagonal brace | |
| WO2022099926A1 (en) | Fatigue test device for boot-shaped steel column foot for railway sound barrier, and fatigue test method therefor | |
| Xiangyu et al. | The verification of rail thermal stress measurement system | |
| Ma et al. | Experimental and theoretical analysis of the correlation between cumulative plastic damage and SMFL of structural steel under low cycle fatigue | |
| CN207336227U (en) | A kind of uniaxial compression test device of measurable test specimen elastic limit | |
| CN209460091U (en) | A kind of device hammering prepressing type test cartridge connection structure compactness of grouting | |
| CN110161078A (en) | A kind of detection and evaluation method of the infra-red inspection for Modified Bitumen Pavement | |
| Mayer | Determination of dynamic fracture toughness at high loading rates | |
| Nichols et al. | Experimental determination of the dynamic Modulus of Elasticity of masonry units | |
| Huang et al. | Mechanical responses of granite under confined direct tensile testing: fracture, strength, energy conversion and mechanism | |
| CN105651441A (en) | Sleeper bearing reaction test method | |
| CN208076079U (en) | Track fixing bolt forces testing sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180525 Termination date: 20191031 |