CN217717332U - Steel rail static bending testing machine - Google Patents
Steel rail static bending testing machine Download PDFInfo
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- CN217717332U CN217717332U CN202221406457.9U CN202221406457U CN217717332U CN 217717332 U CN217717332 U CN 217717332U CN 202221406457 U CN202221406457 U CN 202221406457U CN 217717332 U CN217717332 U CN 217717332U
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Abstract
The utility model discloses a quiet curved testing machine of rail. The steel rail static bending testing machine is provided with a pressure head, a support for supporting a steel rail static bending test sample and a transverse centering device arranged on two sides of the support, wherein the transverse centering device has the following structure: the sliding block is used for transversely moving the steel rail static bending sample and is sleeved on the slide way and the positive and negative screw rods; and the bottom of the steel rail static bending sample is provided with a laser range finder. The steel rail static bending testing machine basically overcomes the defect of system error of the conventional similar testing machine, and improves the testing precision, accuracy and safety.
Description
Technical Field
The utility model relates to a detection apparatus for article mechanical properties, specifically speaking, the utility model relates to a quiet curved testing machine of rail.
Background
The steel rail static bending test is a mechanical property test in which a steel rail static bending sample is placed on two supports, and a concentrated load is applied to the middle points of the two supports, so that the steel rail static bending sample generates bending stress and deformation.
The existing steel rail static bending testing machine has a partial structure shown in fig. 8, and mainly comprises a pressure head 1, a displacement meter stay wire 7, a displacement meter 8, a connecting rod 9, an oil cylinder sleeve fixing plate 10, an oil cylinder 11 and a load sensor 12. The deflection measuring device, namely the displacement meter 8 in fig. 8 is mostly arranged at the oil cylinder 11 for loading the pressure head, and assembly gaps exist among the pressure head 1, the load sensor 12 and the oil cylinder 11. In the static bending test process, the deflection data measured by the displacement meter 8 is the sum of the gaps among the pressure head 1, the load sensor 12 and the oil cylinder 11 and the real deflection of the sample, so that the measured deflection data is inaccurate and has system errors.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect of the system error, the utility model aims to provide a quiet bending test machine of rail. The steel rail static bending testing machine can accurately measure the deflection data of a steel rail static bending sample, and the problems of inaccurate deflection measurement and system errors caused by installation gaps of various parts are avoided, so that the testing precision is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a steel rail static bending testing machine is provided with a pressure head, a support for supporting a steel rail static bending test sample and transverse centering devices arranged on two sides of the support, wherein the transverse centering devices have the following structures: the sliding block is used for transversely moving the steel rail static bending sample and is sleeved on the slide way and the positive and negative screw rods; and the bottom of the steel rail static bending sample is provided with a laser range finder.
Furthermore, a base for flexibility testing is further arranged, a placing hole is formed in the base, and the laser range finder is placed in the placing hole.
Furthermore, a slide way hole which is connected with the slide way in a sliding way is arranged on the slide block. The "slide connection" refers to a state in which the slider is restricted by the slide rail and can only slide along a predetermined path of the slide rail.
Furthermore, the slide block is provided with a screw hole with positive and negative teeth matched with the screw with positive and negative teeth.
Therefore, the aforementioned "sleeving" means that the slider is sleeved on the slide way and the positive and negative lead screws through the slide way hole and the positive and negative lead screw holes, and the slider can move along the slide way.
Furthermore, a cylindrical roller is arranged on the inner side of the sliding block. The cylindrical roller is used for longitudinal sliding.
Furthermore, the transverse centering device is also provided with fixed ends which are respectively connected with the positive and negative tooth lead screws and the slide way.
Furthermore, the fixed end is also connected with a bracket. Therefore, the fixed end is connected with the positive and negative screw rod, the slideway and the bracket.
Furthermore, two ends of the screw rod with the positive and negative teeth are respectively provided with a crank.
The functions of the components are as follows:
(1) A pressure head: for applying static bending test loads.
(2) Welding seams: butt welding of rails joined by welding.
(3) Base for deflection test: the laser range finder is placed in the laser range finder placing hole and used for measuring the steel rail deflection in the static bending test process. In addition, the light spot emitted by the laser range finder can be used for longitudinal centering after being aligned with the welding seam.
(4) Steel rail static bending sample: the rail butt joints connected by the welding method bear bending load in a static bending test.
(5) The transverse centering device comprises: and the steel rail static bending test piece is placed on two sides outside the support and used for transversely centering the steel rail static bending test piece.
(51) A slide block: the device is used for transversely moving the steel rail static bending test sample to transversely center the steel rail static bending test sample.
(52) Cylindrical roller: the sliding block is assembled in the sliding block, so that the sliding block can conveniently longitudinally slide after propping against a steel rail sample.
(53) Screw rod with positive and negative teeth: the two sliding blocks can move towards the middle or both ends simultaneously after the crank is rotated by matching with the screw holes of the positive and negative teeth on the sliding blocks.
(54) A slideway: the slider runs on a track. The overall strength of the transverse centering device is improved.
(55) Fixing end: the screw rod with the positive and negative teeth, the slide way and the bracket are connected.
(56) A crank: the crank rotates to drive the two sliding blocks to move towards the middle or both ends simultaneously.
(57) A support: the transverse centering device supports.
(58) Positive and negative tooth screw holes: is connected with the screw rod with positive and negative teeth by screw thread.
(59) A slide way hole: is connected with the slideway in a sliding way.
(6) A support: the steel rail static bending test sample is supported in the static bending test process, the arc radius of the support is 100mm +/-5 mm, and the center distance between the two supports is 1000mm +/-5 mm.
The utility model has the advantages that:
1. the system error is basically eliminated: the laser range finder placed at the bottom of the steel rail can accurately measure deflection data of a sample, avoid inaccurate deflection measurement caused by installation gaps of various parts and components and improve test precision.
2. The transverse centering device can simplify the transverse centering process in the static bending test process, and is more accurate and efficient compared with manual adjustment. When transverse centering is finished, the rail static bending test sample is pushed by longitudinal hand to slide, so that transverse sliding of the test sample in the longitudinal hand pushing process is avoided, and the test accuracy is improved.
3. During the railhead downward static bending test, the transverse centering device can provide an auxiliary supporting effect, so that the side turning of the sample is avoided, and the safety of the sample in the centering process is improved.
4. When quiet curved sample fracture, the design of base step form design and laser range finder place the hole is used in the test of amount of deflection for the sample is placed in a certain step department to one side after the fracture, and the sample direct impact laser range finder that has avoided the fracture back causes the damage.
Drawings
Fig. 1 is a schematic view of the steel rail static bending tester of the present invention.
Fig. 2 is a schematic side view (railhead up) of the steel rail static bending tester of the present invention.
Fig. 3 is a schematic side view (railhead down) of the steel rail static bending tester of the present invention.
Fig. 4 is a schematic side view of the lateral centering device of the present invention.
Fig. 5 is a schematic top view of the lateral centering device of the present invention.
Fig. 6 is a schematic view of the slider of the present invention.
Fig. 7 is a schematic top view of the deflection testing base of the present invention.
Fig. 8 is a schematic structural diagram of the upper part of a pressure head of a conventional steel rail static bending tester.
Description of reference numerals: 1-a pressure head; 2-welding seams; 3-base for testing deflection; 4-steel rail static bending sample; 5, a transverse centering device; 6, a support; 7-displacement meter pull wire; 8-a displacement meter; 9-connecting rod; 10-oil cylinder sleeve fixing plate; 11-oil cylinder; 12-a load cell;
31-a base step; 32-laser range finder placing hole;
51-a slide block; 52-cylindrical roller; 53-positive and negative tooth lead screw; 54-a slide; 55-fixed end; 56-a crank; 57-a support; 58, screw holes for positive and negative teeth; 59-slideway hole.
Detailed Description
Example 1
As shown in fig. 1 to 7, the steel rail static bending testing machine of the present invention has a pressure head 1 and a support 6 for supporting the steel rail static bending test sample 4, and further has a horizontal centering device 5 disposed on both sides of the support 6, wherein the horizontal centering device 5 has the following structure: the sliding block 51 is used for transversely moving the steel rail static bending sample 4, and the sliding block 51 is sleeved on the slideway 54 and the positive and negative screw rod 53; and a laser range finder is arranged at the bottom of the steel rail static bending sample 4.
The base 3 for the deflection test is arranged at the bottom of the steel rail static bending sample 4, the base 3 is provided with a laser range finder placing hole 32, and the laser range finder is arranged in the placing hole 32. The base 3 for the deflection test is further provided with base steps 31 for people to go up and down, as shown in fig. 7.
As shown in fig. 6, the slider 51 is provided with a slide hole 59 slidably connected to the slide 54. The slide block 51 is provided with a front and back thread screw hole 58 matched with the front and back thread screw 53. The inner side of the slide block 51 is provided with a cylindrical roller 52.
As shown in fig. 4 and 5, the transverse centering device 5 further has a fixing end 55 connecting the front and back lead screws 53 and the slide 54, respectively. The fixed end 55 is also connected to a bracket 57.
Two ends of the screw 53 with the positive and negative teeth are respectively provided with a crank 56.
The basic operating procedure for using the steel rail static bending tester described in example 1 was as follows, divided into two test cases:
1. testing process (railhead up)
1.1 the rail head of the rail static bending sample 4 is placed upwards on the two supports 6, the two crank handles 56 are rotated simultaneously, so that the two sliding blocks 51 on each transverse centering device 5 move towards the middle simultaneously until the cylindrical rolling shafts 52 on the two sliding blocks 51 are contacted with the two sides of the rail bottom of the rail static bending sample 4, and at the moment, the rail static bending sample 4 is in a transverse centering state.
1.2 open the laser range finder in laser range finder places the hole 32, the quiet curved sample 4 of hand push longitudinal sliding rail, when photometry distancer's facula and rail foot welding seam 2 aligned, the quiet curved sample 4 of rail had been in vertical centering state.
1.3 simultaneously rotating the two rockers 56, the two sliders 51 of each transverse centering device move towards both ends simultaneously.
1.4 operating the steel rail static bending test, wherein a pressure head 1 slowly contacts a steel rail welding seam 2, and the loading speed is 40 kN/s-80 kN/s or 0.7 mm/s-1.2 mm/s (appendix C of China railway industry standard TB/T1632.1-2014). And loading to a specified load, recording a load-deflection curve by using a testing machine, and taking down a steel rail static bending sample after the test is finished.
2. Test procedure (railhead down):
2.1 the rail head of the rail static bending sample 4 is placed downwards on the two supports 6, and the two cranks 56 are rotated simultaneously, so that the two sliders 51 on each transverse centering device move towards the middle simultaneously until the cylindrical rollers 52 on the two sliders 51 are contacted with the two sides of the rail head of the rail static bending sample 4, and at the moment, the rail static bending sample 4 is in a transverse centering state.
2.2 open the laser range finder in the laser range finder placing hole 32, the hand push vertically slides rail static bending sample 4, when photometry range finder's facula and railhead welding seam 2 align, rail static bending sample 4 has been in vertical centering state.
2.3 slowly lowering the ram until the ram 1 contacts the rail foot, and rotating the two rockers 56 to move the two blocks 51 of each transverse centring device 5 towards both ends simultaneously.
2.4 running the rail static bending test, the pressure head 1 slowly contacts the rail welding seam 2, the loading speed is 40 kN/s-80 kN/s or 0.7 mm/s-1.2 mm/s (China railway industry standard TB/T1632.1-2014 appendix C). And loading to a specified load, recording a load-deflection curve by using a testing machine, and taking down a steel rail static bending sample after the test is finished.
It is right above the utility model relates to a quiet curved testing machine of rail has carried out detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and embodiment have been elucidated, and the explanation of above embodiment is only used for helping understanding the utility model discloses a scheme and core thought thereof. It should be noted that the present invention is not limited to the above-described exemplary embodiments, and those skilled in the art can make various changes and modifications without departing from the scope or spirit of the present invention. Meanwhile, for the general technical personnel in the field, according to the idea of the utility model, the specific implementation mode and the application range can be changed; therefore, in view of the above, the present disclosure should not be construed as limiting the present invention.
Claims (8)
1. A steel rail static bending testing machine is provided with a pressure head and a support for supporting a steel rail static bending test sample, and is characterized by further comprising transverse centering devices arranged on two sides of the support, wherein the transverse centering devices have the following structures: the sliding block is used for transversely moving the steel rail static bending sample and is sleeved on the slide way and the positive and negative screw rods; and the bottom of the steel rail static bending sample is provided with a laser range finder.
2. A steel rail static bending tester according to claim 1, further comprising a base for flexibility testing, wherein the base is provided with a placing hole, and the laser range finder is placed in the placing hole.
3. The steel rail static bending tester according to claim 1, wherein the sliding block is provided with a sliding track hole which is connected with the sliding track in a sliding way.
4. The steel rail static bending tester according to claim 1, wherein the slider is provided with a screw hole with positive and negative teeth matched with the screw with positive and negative teeth.
5. A steel rail static bending tester according to claim 1, wherein the inside of the slider is provided with a cylindrical roller.
6. The steel rail static bending tester according to claim 1, wherein the transverse centering device is further provided with fixed ends respectively connected with the positive and negative tooth lead screws and the slide way.
7. The steel rail static bending tester according to claim 6, wherein the fixed end is further connected with a bracket.
8. The steel rail static bending tester according to claim 1, wherein the two ends of the screw rod with the positive and negative teeth are respectively provided with a crank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221406457.9U CN217717332U (en) | 2022-06-07 | 2022-06-07 | Steel rail static bending testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221406457.9U CN217717332U (en) | 2022-06-07 | 2022-06-07 | Steel rail static bending testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217717332U true CN217717332U (en) | 2022-11-01 |
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ID=83799147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221406457.9U Active CN217717332U (en) | 2022-06-07 | 2022-06-07 | Steel rail static bending testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217717332U (en) |
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2022
- 2022-06-07 CN CN202221406457.9U patent/CN217717332U/en active Active
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