CN100429106C - Force detector and detection method for stress generated by defferent temp of long rail - Google Patents
Force detector and detection method for stress generated by defferent temp of long rail Download PDFInfo
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- CN100429106C CN100429106C CNB2005100098208A CN200510009820A CN100429106C CN 100429106 C CN100429106 C CN 100429106C CN B2005100098208 A CNB2005100098208 A CN B2005100098208A CN 200510009820 A CN200510009820 A CN 200510009820A CN 100429106 C CN100429106 C CN 100429106C
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- long rail
- measuring
- displacement
- rail
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Abstract
The present invention discloses a force detecting device and a detecting method for stress generated by the different temperature of long steel rails. The fixing special force detecting device is arranged in the measured position of a long steel rail 3 and provided with a measuring rod 4 which is made of the same materials with measured long steel rail, one end of the measuring rod 4 is fixedly connected to a measuring point of the long steel rail 3, the other end of the measuring rod 4 is connected to the dynamic end 5 of a displacement sensor, the static end 6 of the displacement sensor is connected to the other measuring point of the long steel rail 3, and the displacement sensor is connected with a displacement detecting recorder through a data output line 9. In an unlockeing free state of the long steel rail, a measuring number value is calibrated with zero, an output value of the displacement sensor is measured by the displacement detection recorder after the long steel rail is locked, and the stress which is also temperature stress generated by the different temperature of railway long steel rails is detected. Besides, the present invention can realize the continuous measurement of the temperature stress of long steel rails in the operation of railways.
Description
Technical field
The present invention relates to a kind of rail stress device for measuring force and method of inspection, especially a kind of under railway line utilization condition long rail produce the device for measuring force and the method for inspection of stress because of temperature traverse.
Background technology
Production has earth shaking meaning for railway transportation in the detection of long rail stress, and along with improving constantly of railroad train running velocity, railway welds seamless long rail length constantly to be increased.Be increased to several kms by original hundreds of rice, tens kms, the continuously welded rail track of hundreds of km occurs now, and drops into and use.Increase along with continuously welded rail track length, long rail can not freely stretch with variation of ambient temperature again, the stress that is produced by temperature traverse is that temperature stress is also increasing to the influence of the long steel rail line of railway, and the disconnected rail, the rail accident that expands that are caused by temperature stress happen occasionally.So, when temperature stress is excessive, report to the police, become the problem that the routine of railway department presses for solution to the detection of long rail temperature force.All fail to solve well this detection difficult problem at present both at home and abroad.Existing measurement technique has: horizontal afterburning mensuration, steel ruler mensuration, vibration survey method etc., measurer have TS-2 shaped steel rail tension gauge, long rail stress chi etc.
China's utility model patent 91205496.4 discloses a kind of long rail stress chi, measures the temperature stress of long rail by the long rail stress chi of customized design manufacturing.This is a kind of manual metering system, is difficult to realize that automation detects.
Chinese invention patent 02104896.7 discloses the method for inspection of the long rail temperature force of a kind of continuously welded rail track, this patent is a kind of method of inspection that the transverse horizontal application force is measured long rail temperature force that applies on long rail, need cut off traffic during detection, remove long rail fastening, operate very inconvenient.
Above measurement means all has a common shortcoming, each exactly measurement all will be done complicated dead work, to measure apparatus and bring up to railway, the method of measurement that has need be blocked circuit, and can only detect at that time data, can not under circuit utilization state, detect the temperature stress data of the long rail of railway whenever and wherever possible, more can not obtain the continuous change procedure of temperature stress.At present railway department is commonly used measures long rail temperature and calculates the temperature stress of long rail indirectly with the empirical equation Calculation Method, thus since variation of ambient temperature, long rail internal and external temperature the data that obtain of factor are more coarse on an equal basis.
Summary of the invention
The objective of the invention is deficiency, a kind of device for measuring force and method of inspection that can detect the long rail temperature force of railway whenever and wherever possible is provided at existing detection technique scheme.For realizing purpose of the present invention, the present invention adopts the identical principle of identical material material deformation in same temperature variation field, uses displacement sensor tested long rail and the temperature stress of measuring long rail under unlock state with the method for the same material members of long rail deflection difference in same temperature variation field under lock-out state.At the tested position of long rail device for measuring force is installed, device for measuring force is provided with the sounding rod made from the identical material material of tested long rail 4, sounding rod 4 one ends are by nut 1 and preceding fixed block 2 and long fastening connection of rail 3 one measuring points, and the other end connects displacement pickup moved end 5.Another measuring point is fastening connects by dead ring 7, back fixed block 8 and long rail 3 for the quiet end of displacement pickup 6, and distance is the measurement length L between two fixed blocks.
The method of inspection of long rail temperature force of the present invention is by tested long rail 3 of the displacement sensor in the device for measuring force and sounding rod 4 breathing amount differences, and then elastic modulus E and the measurement length L according to long rail material just can calculate instant long rail temperature force P.Because displacement pickup output is continuous, after installing, device for measuring force can detect and write down the temperature stress of the long rail of railway whenever and wherever possible.Method of inspection may further comprise the steps:
(a) install and fix device for measuring force in long rail measured point.
(b) measure and recording unit with 15 conducts of displacement detecting recording instrument, link to each other with displacement pickup by data line 9.
(c) be under the free state of non-locking at long rail, the numerical value demarcation that the displacement detecting recording instrument is detected is zero.
(d) during railway line locking back utilization, with the output valve of 15 measurements of displacement detecting recording instrument and recorded bit displacement sensor.
(e) calculate the real-time temperature power of tested long rail according to following formula:
P＝E·i/L
The real-time temperature power (MPa) of the tested long rail of P-in the formula; The tested long rail material modulus of elasticity of E-(MPa); The output valve of the measured displacement pickup of i-(m); The L-device for measuring force is measured length (m).
The present invention after the tested position of long rail installs, can measure the temperature stress of long rail with device for measuring force for a long time, whenever and wherever possible.If equipped again data processing system and data transmission network can be realized multidrop networkization, the automatic monitoring of long rail temperature force easily.Relevant department can use a computer by network and monitor the long rail temperature force situation of circuit in its administration at any time, real automation, the networking that realizes that long rail temperature force detects.And can obtain being convenient to retrieving the continuous chart of the long rail temperature force of research, can also realize the excessive auto alarm of long rail temperature force, avoid, improve railway safety in production reliability because of the excessive generation that causes accident of long rail temperature force.
Description of drawings
Fig. 1 is that device for measuring force is at the tested position of long rail scheme of installation;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is the B-B cutaway view of Fig. 1;
The specific embodiment
Below in conjunction with the detailed description the specific embodiment of the present invention of accompanying drawing.
Install and fix device for measuring force at the tested position of long rail as shown in Figure 1, device for measuring force is provided with sounding rod 4, the tested long rail identical materials of sounding rod 4 usefulness is made, and its cross-sectional plane is circular, also can make the member of square or other shape of cross section of cross-sectional plane on demand.Sounding rod 4 one ends connect by nut 1 and preceding fixed block 2, and the other end connects displacement pickup moved end 5.Binding bolt 11 and preceding compact heap 12 were fixedly connected with long rail 3 one measuring points before preceding as shown in Figure 2 fixed block 2 utilized.The quiet end 6 of displacement pickup connects with back fixed block 8 by dead ring 7 and screw 10 as shown in Figure 3, and back fixed block 8 utilizes back binding bolt 13 and back compact heap 14 to be fixedly connected with long rail 3 another measuring points.Distance is for measuring length L between two fixed blocks, with and the supporting displacement detecting recording instrument 15 of displacement pickup as measurement and recording units, link to each other with displacement pickup by data line 9, do not hinder train to pass through after the installation.
Be at long rail under the free state of non-locking, it is zero that the numerical value that the displacement detecting recording instrument is detected is demarcated, and the displacement that produces when expanding of setting measurement bar 4 be on the occasion of, the displacement that produces during contraction is a negative value.During railway line utilization behind the long rail fastening down, the output valve with measurement of displacement detecting recording instrument and recorded bit displacement sensor just can obtain long rail temperature force.The output valve of establishing a period of time displacement pickup behind the long rail fastening down in this embodiment is on the occasion of 0.05 millimeter, distortion difference i=5 * 10 of promptly long rail 3 and sounding rod 4
-5M establishes measurement length L=1m, the elastic modulus E of long rail material=2.1 * 10
5MPa.Then calculate the real-time temperature power P of tested long rail according to formula
P＝E·i/L＝2.1×10
5×5×10
-5/1×＝10.5MPa
P be on the occasion of, tested long rail is stressed.
Computing formula is imported the real-time temperature power numerical value that computing machine can directly obtain long rail.
Displacement pickup in the device for measuring force of the present invention can be selected the satisfactory appearance grid of survey precision, magnetic grid, grating or other displacement pickup for use and not depart from the scope of the present invention.
Sounding rod 4 in the device for measuring force of the present invention is members made from identical material material with tested long rail, and its cross-sectional plane can be made the member of any shape of cross section on demand, and does not depart from the scope of the present invention.For example, the rail section of use and the same model of tested long rail is considered with tested long rail temperature to change synchronously as sounding rod 4, and is more desirable.
Claims (5)
1, a kind of device for measuring force of stress generated by defferent temp of long rail, device for measuring force is provided with the member sounding rod (4) of usefulness and the manufacturing of long rail same material, sounding rod (4) one ends connect by nut (1) and preceding fixed block (2), and the other end connects displacement pickup moved end (5); Binding bolt (11) and preceding compact heap (12) were fixedly connected with long rail (3) one measuring points before preceding fixed block (2) utilized; The quiet end of displacement pickup (6) connects with back fixed block (8) by dead ring (7) and screw (10); Back fixed block (8) utilizes back binding bolt (13) and back compact heap (14) to be fixedly connected with another measuring point of long rail (3); Distance as measuring and recording unit, links to each other with displacement pickup by data line (9) with displacement detecting recording instrument (15) for measuring length L between two fixed blocks.
2, device for measuring force according to claim 1 is characterized in that: the cross-sectional area of sounding rod (4) is made circular or square.
3, device for measuring force according to claim 1 is characterized in that: sounding rod (4) is used and the rail section of tested long rail same model is made.
4, device for measuring force according to claim 1 is characterized in that: the displacement pickup in the device for measuring force is for holding grid, magnetic grid or grating.
5, a kind of method of inspection of stress generated by defferent temp of long rail, use displacement sensor under lock-out state tested long rail and identical material members under free state with long rail in same transformation temperature environment, the method of same measurement length deformation amount difference detects long rail temperature force, and this method may further comprise the steps:
(a) at the tested position of long rail device for measuring force is installed, this device for measuring force is provided with the member sounding rod (4) of usefulness and the manufacturing of long rail same material, sounding rod (4) one ends connect by nut (1) and preceding fixed block (2), and the other end connects displacement pickup moved end (5); Binding bolt (11) and preceding compact heap (12) were fixedly connected with long rail (3) one measuring points before preceding fixed block (2) utilized; The quiet end of displacement pickup (6) connects with back fixed block (8) by dead ring (7) and screw (10); Back fixed block (8) utilizes back binding bolt (13) and back compact heap (14) to be fixedly connected with another measuring point of long rail (3); Distance is for measuring length L between two fixed blocks;
(b) measure and recording unit with displacement detecting recording instrument (15) conduct, link to each other with displacement pickup by data line (9);
(c) be under the free state of non-locking at long rail, the numerical value demarcation that displacement detecting recording instrument (15) is detected is zero;
(d) during railway line utilization behind the long rail fastening down, measure and recorded bit displacement sensor output valve with displacement detecting recording instrument (15);
(e) be calculated as follows the real-time temperature power of tested long rail;
P＝E·i/L
The real-time temperature power (MPa) of the tested long rail of P-in the formula; The tested long rail material modulus of elasticity of E-(MPa); The output valve of the measured displacement pickup of i-(m); The L-device for measuring force is measured length (m).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100098208A CN100429106C (en) | 2005-03-15 | 2005-03-15 | Force detector and detection method for stress generated by defferent temp of long rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100098208A CN100429106C (en) | 2005-03-15 | 2005-03-15 | Force detector and detection method for stress generated by defferent temp of long rail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1833938A CN1833938A (en) | 2006-09-20 |
| CN100429106C true CN100429106C (en) | 2008-10-29 |
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| CNB2005100098208A Expired - Fee Related CN100429106C (en) | 2005-03-15 | 2005-03-15 | Force detector and detection method for stress generated by defferent temp of long rail |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7869909B2 (en) * | 2004-07-26 | 2011-01-11 | Harold Harrison | Stress monitoring system for railways |
| WO2010142073A1 (en) * | 2009-06-08 | 2010-12-16 | 中国铁道科学研究院机车车辆研究所 | Wheel-rail vertical force continuous measuring method and device based on rail strain |
| CN103115562B (en) * | 2013-01-21 | 2016-06-01 | 北京工业大学 | High ferro non-fragment orbit displacement monitor |
| CN103335589B (en) * | 2013-06-25 | 2016-04-06 | 大连理工大学 | The scaling method of welded rail temperature stress sensing node |
| CN104034458B (en) * | 2014-06-25 | 2016-04-06 | 西南交通大学 | Based on the seamless turnout on bridge rail integrated test facility of fiber-optic grating sensor |
| CN112721995B (en) * | 2020-12-02 | 2022-12-02 | 桂林理工大学 | Railway jointless track crawling monitoring device and method |
| CN112729098B (en) * | 2020-12-02 | 2023-10-10 | 桂林理工大学 | Low-power consumption railway seamless line crawling monitoring device and method |
| CN114152170A (en) * | 2021-11-17 | 2022-03-08 | 中铁五局集团路桥工程有限责任公司 | Tramcar steel rail tensile displacement measurement method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1518359A (en) * | 1977-02-02 | 1978-07-19 | Strainstall Ltd | Force measurement |
| US5161891A (en) * | 1991-02-12 | 1992-11-10 | Practical Transportation, Inc. | Process for determining and controlling railroad rail's neutral temperature to prevent track buckling and rail fractures |
| CN2274757Y (en) * | 1996-12-24 | 1998-02-18 | 北方交通大学 | Apparatus for measuring deformation of rails effected by temperature |
| CN2475641Y (en) * | 2001-06-04 | 2002-02-06 | 北方交通大学 | Steel rail dynamic deformation measuring device |
-
2005
- 2005-03-15 CN CNB2005100098208A patent/CN100429106C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1518359A (en) * | 1977-02-02 | 1978-07-19 | Strainstall Ltd | Force measurement |
| US5161891A (en) * | 1991-02-12 | 1992-11-10 | Practical Transportation, Inc. | Process for determining and controlling railroad rail's neutral temperature to prevent track buckling and rail fractures |
| CN2274757Y (en) * | 1996-12-24 | 1998-02-18 | 北方交通大学 | Apparatus for measuring deformation of rails effected by temperature |
| CN2475641Y (en) * | 2001-06-04 | 2002-02-06 | 北方交通大学 | Steel rail dynamic deformation measuring device |
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| CN1833938A (en) | 2006-09-20 |
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Granted publication date: 20081029 Termination date: 20110315 |