CN211477917U - Test device and system for measuring longitudinal resistance of steel rail - Google Patents
Test device and system for measuring longitudinal resistance of steel rail Download PDFInfo
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- CN211477917U CN211477917U CN201921840092.9U CN201921840092U CN211477917U CN 211477917 U CN211477917 U CN 211477917U CN 201921840092 U CN201921840092 U CN 201921840092U CN 211477917 U CN211477917 U CN 211477917U
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 36
- 239000010959 steel Substances 0.000 title claims abstract description 36
- 238000009864 tensile test Methods 0.000 claims abstract description 24
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 241001669679 Eleotris Species 0.000 claims abstract description 12
- 238000007405 data analysis Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model relates to a test device and system for rail longitudinal resistance survey, the device includes: a base; the ratchet guide rail is fixed on the base; the box body spans the ratchet guide rail; the pawl assembly penetrates through the box body and comprises a driving rotary rod, a left driving pawl and a right driving pawl which are respectively arranged on two sides of the driving rotary rod along the extension direction of the ratchet guide rail, one of the left driving pawl and the right driving pawl can slide in the corresponding direction when lifted, and the other one falls on the ratchet guide rail to form a locking state of sliding towards the corresponding direction; the horizontal plate is arranged at the top of the box body, and the sleeper and the steel rail to be detected are sequentially fixed on the horizontal plate; and the displacement sensor is arranged on one side of the box body through a support and is connected with the opposite end of the stretched end of the steel rail to be detected. Compared with the prior art, the utility model is used for cooperating vertical tensile testing machine, not only can play the guard action to indulging the machine of drawing, and have the self-protection mechanism, have simple structure, use advantage such as simple and convenient, with low costs.
Description
Technical Field
The utility model belongs to the technical field of railway test equipment technique and specifically relates to a test device and system for rail longitudinal resistance survey is related to.
Background
The longitudinal resistance measurement test of the steel rail adopts the Chinese railway industry standard, and the principle is as follows: assembling the short steel rail on the rail bearing surface of the fixed sleeper by using a fastener, applying longitudinal tension to the steel rail, recording the load and the longitudinal displacement of the steel rail relative to the sleeper, unloading when the steel rail slides, and obtaining the longitudinal resistance of the steel rail from a load-displacement curve.
The longitudinal tensile testing machine (hereinafter referred to as longitudinal drawing machine) is widely applied equipment in a plurality of testing instruments and is mainly used for tensile mechanical property tests of metal and non-metal materials.
When a rail longitudinal resistance measuring test is carried out, a longitudinal pull testing machine is used for pulling a rail leftwards until the rail slipping stops testing to measure the tensile force required by the rail slipping, but due to uncertain factors (such as software instability), sometimes a machine pushes the rail rightwards, because a longitudinal tensile test is mainly used for measuring the tensile mechanical property of a material, the main function of the longitudinal tensile test is pulling instead of pressing, and the testing machine and the rail are fixed (the prior test directly fixes a sleeper and the rail on a test table), when the machine pushes the rail rightwards, the machine is subjected to a leftward counter force, and when the force reaches a certain degree, the machine is likely to be damaged. Therefore, the longitudinal tension testing machine needs to be protected when a steel rail longitudinal resistance measurement experiment is carried out.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a test device and system for rail longitudinal resistance survey just in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a test device for rail longitudinal resistance survey, includes the base of setting on the test bench, still includes:
the ratchet guide rail is fixed on the base;
the box body spans the ratchet guide rail;
the pawl assembly penetrates through the box body and comprises a driving rotary rod, a left driving pawl and a right driving pawl which are respectively arranged on two sides of the driving rotary rod along the extension direction of the ratchet guide rail, one of the left driving pawl and the right driving pawl can slide in the corresponding direction when lifted, and the other one falls on the ratchet guide rail to form a locking state of sliding towards the corresponding direction;
the horizontal plate is arranged at the top of the box body, and a sleeper and a steel rail to be detected are sequentially fixed on the horizontal plate;
and the displacement sensor is arranged on one side of the box body through a support and is connected with the opposite end of the stretched end of the steel rail to be detected.
Preferably, the ratchet guide rail is provided with two parallel ratchet guide rails.
Preferably, the bottom of the ratchet guide rail is provided with a pressure sensor.
Preferably, the box body comprises an outer box and an inner box sleeved in the outer box and connected with the outer box, and the ratchet guide rail is arranged between the inner side of the outer box and the outer side of the inner box.
Preferably, one end of the driving rotary rod extends out of one side of the box body and is provided with a power-assisted rod.
Preferably, a level device is arranged on the horizontal plate.
Preferably, the number of the levelers is four, and the levelers are distributed around the horizontal plate.
Preferably, the top of the inner side of the box body is respectively provided with a fixing patch corresponding to the left driving pawl and the right driving pawl, and the upper side of the left driving pawl, the upper side of the right driving pawl and the lower side of the fixing patches are respectively provided with a strong magnet.
Preferably, the base is provided with a T-shaped groove, and the ratchet guide rail is fixed in the T-shaped groove.
The utility model provides an adopt above-mentioned test system who is used for test device of rail longitudinal resistance survey, still includes vertical tensile test machine, data analysis device, be equipped with the tensiometer on the vertical tensile test machine, vertical tensile test machine is connected by the tensile end with the rail that awaits measuring, data analysis device is connected with the control end of vertical tensile test machine, the output of tensiometer, pressure sensor's output, displacement sensor's output respectively.
Compared with the prior art, the utility model has the advantages of it is following:
1. this testing device is used for coordinating vertical tensile test machine, not only can play the guard action to indulging the machine of drawing, and have the self-protection mechanism, this device utilizes the high strength bolt to fix two ratchet guide rails to the laboratory bench, come control slip direction through rotatory initiative swing arm, for example anticlockwise rotation initiative swing arm, then sleeper and rail are the locking state left, but the right side is the slip state, when the machine pushes away the rail right, then can not receive the counter-force left, thereby protect the machine, the machine damage risk has greatly been reduced, and the installation is simple, low cost.
2. The upper part of the outer box is provided with a horizontal plate, four sides of the horizontal plate are respectively provided with a level, the level is adjusted by rotating bolts arranged around the horizontal plate, so that bubbles are positioned in the middle of the level, the horizontal plate is ensured to be in a horizontal state, the test precision is improved, and the test error caused by the inclination of the pulled steel rail is greatly reduced.
3. The device has a self-protection mechanism, the device can measure the pull-slip performance of steel rails of different types and the tensile performance of other materials, due to factors such as uncertainty of the tensile strength of the materials, when the acting force born by the device is greater than the ultimate bearing capacity, the device and a test bed can generate relative displacement and even damage of parts, so that a pressure sensor is embedded at the lower part of the ratchet guide rail and connected with computer software, and when the pressure reaches a certain value, the longitudinal tensile testing machine can be stopped through a data analysis device to protect the test device.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the top view of the present invention;
FIG. 3 is a view showing a split structure of the utility model;
FIG. 4 is a schematic view of the working process of the present invention;
fig. 5 is a load-displacement curve obtained by the present invention in the example.
The figure is marked with: 1. the device comprises a fixed angle code, 2, a horizontal plate, 3, a level device, 4, a bolt, 5, an active rotary rod, 6, a booster rod, 7, a displacement sensor, 8, a displacement sensor output line, 9, a support, 10, a fastening bolt, 11, a T-shaped strip, 12, a pressure sensor, 13, a fixing bolt, 14, an outer box, 15, an inner box, 16, a fixing patch, 17, a left active pawl, 18, a right active pawl, 19, a ratchet guide rail, 20, a strong magnet, 21, a base, 22, a T-shaped groove, 23, a cylinder, 24, a longitudinal tensile testing machine, 25, a steel rail, 26, a fastener, 27, a sleeper, 28, a test bed, 29, a tension meter, 30, a data analysis device, 31 and a transmission line.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
As shown in FIGS. 1-3, the present application provides a test device for rail longitudinal resistance measurement, which is used for cooperating with a longitudinal tensile testing machine 24, and comprises: the base 21 is arranged on the test bed 28, and the base 21 is provided with a T-shaped groove 22; the ratchet guide rail 19 is fixed in a T-shaped groove 22 of the base 21; a box body, which spans the ratchet guide rail 19; the pawl assembly penetrates through the box body and comprises a driving rotary rod 5, and a left driving pawl 17 and a right driving pawl 18 which are respectively arranged on two sides of the driving rotary rod 5 along the extension direction of the ratchet guide rail 19, wherein the left driving pawl 17 and the right driving pawl 18 are both positioned above the ratchet guide rail 19, one of the left driving pawl 17 and the right driving pawl 18 can slide in the corresponding direction when lifted, and the other one falls on the ratchet guide rail 19 to form a locking state of sliding towards the corresponding direction; the horizontal plate 2 is arranged at the top of the box body, and a sleeper 27 and a steel rail 25 to be detected are sequentially fixed on the horizontal plate; the displacement sensor 7 is arranged on one side of the box body through a support 9 and is connected with the opposite end of the stretched end of the steel rail 25 to be measured, the bottom of the support 9 can be inserted into the T-shaped groove 22 of the base 21, and the position of the support 9 is adjusted through a fastening bolt 10 on the base 21.
The box body comprises an outer box 14 and an inner box 15 which is sleeved in the outer box 14 and connected with the outer box 14, in the embodiment, the inner box 15 and the outer box 14 are connected by a bolt 4 to form a whole, wherein the connection part of the bolt 4 with the inner box 15 and the outer box 14 is rigidly connected.
In this embodiment, two ratchet guide rails 19 are arranged in parallel, the ratchet guide rails 19 are located between the inner side of the outer box 14 and the outer side of the inner box 15, and two left active pawls 17 and two right active pawls 18 are respectively arranged. The bottom of the ratchet guide 19 is provided with a pressure sensor 12.
The horizontal plate 2 is rectangular, four sides of the horizontal plate 2 are respectively provided with a level 3, the level 3 is adjusted by adjusting bolts arranged on the periphery of the horizontal plate 2, so that bubbles are all positioned in the middle of the level 3, and the horizontal plate 2 is ensured to be in a horizontal state.
In the embodiment, the top of the inner side of the outer case 14 is provided with the fixing patches 16 at the positions corresponding to the left active pawl 17 and the right active pawl 18, and the upper side of the left active pawl 17, the upper side of the right active pawl 18 and the lower side of the fixing patches 16 are provided with the strong magnets 20. When the driving rotary rod 5 rotates counterclockwise, due to the action of the powerful magnet 20, the magnetic attraction between the right driving pawl 18 and the right fixed patch 16 is always greater than the magnetic attraction between the left driving pawl 17 and the left fixed patch 16, and the right driving pawl is separated from the right fixed patch, so that the left driving pawl 17 is always kept in contact with the ratchet guide rail 19, and therefore, the left locking state is achieved, and the right sliding state is achieved. When the active lever 5 is rotated clockwise, the opposite is true.
One end of the driving rotary rod 5 extends out of one side of the box body, and is provided with a power-assisted rod 6, so that the acting force between a hand and the driving rotary rod 5 can be effectively increased.
The top of horizontal plate 2 has the fixed angle sign indicating number 1 that is equipped with and is used for fixed sleeper 27, still is equipped with a plurality of bolt holes for the position of fixed angle sign indicating number 1 of adjustment.
The application provides a test system using the test device, and the test system further comprises a longitudinal tensile test machine 24 and a data analysis device 30, wherein in the embodiment, the data analysis device 30 is a computer. The cylinder 23 of the longitudinal tensile testing machine 24 is provided with a tension meter 29, and the longitudinal tensile testing machine 24 is connected with the stretched end of the steel rail 25 to be tested through the cylinder 23. The data analysis device 30 is respectively connected with the control end of the longitudinal tensile testing machine 24, the output end of the tension meter 29, the output end of the pressure sensor 12 and the output end of the displacement sensor 7 through a data acquisition unit. The pressure sensor 12 and the displacement sensor 7 are both externally connected with a power supply module for supplying power. The pressure sensor 12 transmits data to the data analysis device 30, and when the pressure reaches a set threshold value, the data analysis device 30 sends a signal to stop the longitudinal tensile testing machine 24 to work, so that the testing device is protected.
The installation process of the test system comprises the following steps: firstly, placing a base 21 on a test bed 28, aligning a T-shaped groove 22 of the base 21 with the T-shaped groove of the test bed 28, then installing an upper structure and a sensor on the base 21, penetrating an output line out of a wire outlet hole of the base, inserting a T-shaped strip 11 into the T-shaped groove 22 of the base 21 and fixing the T-shaped strip by using a fixing bolt 13; fixing a sleeper 27 on the horizontal plate 2 by using the fixed corner brace 1, fixing a steel rail 25 on the sleeper 27 by using a fastener 26, and adjusting bolts on the periphery of the horizontal plate 2 to enable air bubbles of the four levels 3 to be in the middle; a longitudinal tensile testing machine 24 is arranged on an experiment table, one end of a steel rail 25 is connected with a cylinder 23 of the longitudinal tensile testing machine 24, in the embodiment, the longitudinal tensile testing machine 24 is arranged on the left side of the testing device, and the driving rotary rod 5 rotates anticlockwise; the displacement sensor 7 is mounted on the bracket 9 and is arranged on the right side of the test device, the position is adjusted to enable the thimble of the displacement sensor 7 to be in close contact with the steel rail 25, and the bracket 9 is fixed by screwing the fastening bolt 10.
As shown in fig. 4, the testing process of the testing system includes:
first, setting experimental parameters (loading rate, sampling frequency, etc.) in the data analysis device 30;
secondly, loading the acquired data, wherein the data comprises a plurality of data such as the tension applied to the steel rail 25, the displacement generated by the steel rail, and the pressure applied to the pressure sensor 12 positioned in the base 21;
thirdly, establishing a database for the collected experimental data;
and fourthly, selecting corresponding experimental data in the database according to experimental requirements, analyzing the data by the existing software, automatically drawing, and outputting experimental results.
In this embodiment, the test loading requirements are: tension is applied to one end of the rail 25 at a constant loading rate of 9kN/min to 11kN/min, and from the start of the loading cycle, the load and the relative longitudinal displacement of the rail 25 are automatically measured. When the rail 25 slips or the load exceeds 4 times the performance requirements of the clip 26, the load should be quickly unloaded to zero and the rail 25 displacement measured continuously for 2 minutes. In the test, the fastener 26 should not be disassembled or adjusted in any way, the loading/unloading process is repeated for 3 times, the load is continued after 3min after each unloading, and the load-displacement curve of each loading/unloading cycle is drawn as shown in fig. 5.
In fig. 5, the abscissa is displacement and the ordinate is longitudinal force, and the displacements D1 and D2 are determined from the graph, and then D3 is calculated as follows: d3 ═ D1-D2.
In each curve, the F value is determined by the force required to cause the initial elastic displacement D3. If the loading cycle is stopped at a load greater than or equal to 4 times the performance requirement of fastener 26, the value of F is the maximum value tested. The F value of the first loading cycle is discarded and the average value obtained from the F values of the last 3 loading cycles is used as the longitudinal resistance value of the rail 25.
Claims (10)
1. The utility model provides a test device for rail longitudinal resistance survey, is including setting up the base on the test bench, its characterized in that still includes:
the ratchet guide rail is fixed on the base;
the box body spans the ratchet guide rail;
the pawl assembly penetrates through the box body and comprises a driving rotary rod, a left driving pawl and a right driving pawl which are respectively arranged on two sides of the driving rotary rod along the extension direction of the ratchet guide rail, one of the left driving pawl and the right driving pawl can slide in the corresponding direction when lifted, and the other one falls on the ratchet guide rail to form a locking state of sliding towards the corresponding direction;
the horizontal plate is arranged at the top of the box body, and a sleeper and a steel rail to be detected are sequentially fixed on the horizontal plate;
and the displacement sensor is arranged on one side of the box body through a support and is connected with the opposite end of the stretched end of the steel rail to be detected.
2. A test device for the measurement of the longitudinal resistance of a steel rail according to claim 1, characterized in that the ratchet guide is provided with two parallel arranged strips.
3. A test device for the measurement of the longitudinal resistance of a steel rail according to claim 1, characterized in that the bottom of the ratchet guide rail is provided with a pressure sensor.
4. The test device for measuring the longitudinal resistance of the steel rail as claimed in claim 1, wherein the box body comprises an outer box and an inner box sleeved in the outer box and connected with the outer box, and the ratchet guide rail is arranged between the inner side of the outer box and the outer side of the inner box.
5. The test device for measuring the longitudinal resistance of the steel rail as claimed in claim 1, wherein one end of the driving rotary rod extends out of one side of the box body and is provided with a boosting rod.
6. A test device for the measurement of the longitudinal resistance of a steel rail according to claim 1, characterized in that the horizontal plate is provided with a level.
7. A test device for the longitudinal resistance of a steel rail in claim 6, wherein four levelers are arranged and distributed on the periphery of the horizontal plate.
8. The test device for steel rail longitudinal resistance measurement according to claim 1, wherein the top inside the box body is provided with fixing patches corresponding to the left active pawl and the right active pawl, and the upper side of the left active pawl, the upper side of the right active pawl and the lower side of the fixing patches are provided with strong magnets.
9. The test device for the longitudinal resistance measurement of the steel rail according to claim 1, wherein the base is provided with a T-shaped groove, and the ratchet guide rail is fixed in the T-shaped groove.
10. A system adopting the test device for the longitudinal resistance measurement of the steel rail according to any one of claims 1 to 9, characterized by further comprising a longitudinal tensile test machine and a data analysis device, wherein the longitudinal tensile test machine is provided with a tension meter, the longitudinal tensile test machine is connected with the stretched end of the steel rail to be measured, and the data analysis device is respectively connected with the control end of the longitudinal tensile test machine, the output end of the tension meter, the output end of the pressure sensor and the output end of the displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921840092.9U CN211477917U (en) | 2019-10-30 | 2019-10-30 | Test device and system for measuring longitudinal resistance of steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921840092.9U CN211477917U (en) | 2019-10-30 | 2019-10-30 | Test device and system for measuring longitudinal resistance of steel rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211477917U true CN211477917U (en) | 2020-09-11 |
Family
ID=72361001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921840092.9U Expired - Fee Related CN211477917U (en) | 2019-10-30 | 2019-10-30 | Test device and system for measuring longitudinal resistance of steel rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211477917U (en) |
-
2019
- 2019-10-30 CN CN201921840092.9U patent/CN211477917U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 |