• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    System for testing tensile and compressive fatigue loads on the fastening elements of a railway track within the same load cycle, comprising: - a rail section (21, 31) with an opening along the longitudinal axis of its head (22, 32), which in turn has a cut portion (23); - sleepers and fasteners characteristic of a railway track: - a cylindrical bar (24. 44) located across the opening of the head (22. 32), of such a length that the ends of the cylindrical bar (24. 44) are located outside the opening, and such that part of the the cylindrical bar (24. 44) is visible due to the cut portion (23); - a fork (25, 45) comprising a hole, such that the cylindrical bar (24. 44) is placed through said hole: the system being configured to be coupled to a testing machine, by means of an applicator (26) thus allowing the application of tensile and compression forces with different degrees of inclination on the cylindrical bar (24, 44). and therefore, on the rail (21. 31), the sleepers and the fastening elements of the railway track. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2665577A1
    申请号:ES201700509
    申请日:2017-03-31
    公开日:2018-04-26
    发明作者:Jose Antonio Casado Del Prado；Isidro Alfonso Carrascal Vaquero；Soraya DIEGO CAVIA；Borja ARROYO MARTÍNEZ
    申请人:Universidad de Cantabria；
    IPC主号:
    专利说明:

     DESCRIPTIONIn addition, the head 22 of the rail 21 has a cut portion 23, preferably in its central part, whose dimensions do not change the behavior of the rail 21 appreciably. In a specific embodiment of the invention, the rail section 21 has dimensions of 50 millimeters, although one skilled in the art will understand that there are no minimum and maximum values of rail section dimensions 21. The characteristics of the rail section 21 (material, thickness, etc ...) are the same as those of a lane in use. Figure 3 shows a detailed drawing of the machining of the head 22 of the rail 21. In addition, sleepers and fasteners characteristic of a railway track, are connected to each other and to the rail 21 according to the existing regulations, for a correct realization of the test. The system of the invention further comprises a cylindrical bar 24 located through the opening of the head 22 of the rail 21, and of a length such that the ends of the bar 24 are located outside the opening of the head 22 of the rail 21. The thickness of the bar 24 must be such that it is possible to enter it through the opening of the head 22 of the rail 21, in addition to not being able to break during the test. Part of the bar 24 located within the opening is visible due to the cut portion 23 of the head 22 of the rail 21. Preferably, the material of the bar 24 is high strength steel and of a hardness greater than 55HRC, to avoid degradation of said bar 24 with use. In addition, the system comprises a fork 25 that has a hole and is configured to grab the bar 24 in its visible part within the opening of the head 22 of the rail 21. The bar 24 is positioned through the hole of the fork 25, which allows a relative turn between them during the performance of the test. Preferably, the fork material 25 is high strength steel with a hardness greater than 55HRC, to avoid the degradation of the fork 25 with use. Figure 4 shows a detail of the fork 25 and the bar 24 of the invention.The system is configured to be coupled to a testing machine by means of an applicator 26 belonging to said machine, thus allowing the application of tensile and compressive forces with different degrees of inclination on the cylindrical bar 24, and therefore, on rail 21, the sleepers and the fasteners of the railway track. One skilled in the art will understand that the connection between the applicator 26 and the fork 25 is carried out by any means of fastening used in the metal-mechanical industry, such as by means of threading, screws, welding, etc. The testing machine is outside the present invention, although it should be mentioned that it must meet a series of requirements such as being able to apply alternative dynamic tensile-compression loads, that is, it must be a dynamic testing machine. The system of the invention is configured to allow relative rotation between the applicator 26 of the test machine and the longitudinal axis of the rail 21, with the aim of fixing an appropriate angle between them for each type of test, thanks to the ball joint effect between the bar 24, 44 the rail 21 and the fork 25. The system of the invention has, in front of the system described in the prior art, the advantage of adapting to any range of load variation, this range being dependent on the type of subject to be evaluated, and using only applicator 26 (also called actuator) of the testing machine. The system also provides greater stability of the tools during the repeated load test, which translates into greater safety for the technician and the equipment. On the other hand, in the absence of a spring in the system of the invention, the accessory elements susceptible to failure are not necessary, replacing all this with a bar system 24, and fork 25, of great robustness. In addition, the system of the invention simplifies the conception, since by directly anchoring the applicator 26 by means of a bar 24 and a fork 25, the effects of the spring do not have to be counteracted. In this way the programming of the applicator 26 is done directly between the maximum compression and minimum tensile loads indicated by the manual for the case.5 10 concrete as desired. Finally, the system of the invention is economical due to its adaptability to any type of testing machine, applicator 26 and variant of the rail fasteners to be evaluated, without having to include a spring of peculiar characteristics in each case. . 
    权利要求:
    Claims (4)
    [1]
    5 10 15 20 25 30 CLAIMS 1. System for testing tensile and compression fatigue loads on the fastening elements of a railway track within the same load cycle, characterized in that it comprises: -a rail section (21) with an opening along the longitudinal axis of its head (22), such that said head (22) in turn has a cut portion (23); -a plurality of sleepers and fastening elements linked to each other and to the rail (21); -a cylindrical bar (24) transverse to the opening of the head (22) of the rail (21) and of a length such that the ends of the bar (24) are located outside the opening, and with a thickness such that it allows its introduction through the opening of the head (22) and such that part of the bar (24) located within the opening is visible through the cut portion (23) of the head (22) of the rail (21 ), and - a fork (25) which in turn has a hole, the fork (25) being linked to the cylindrical bar (24) in its visible portion within the opening of the head (22) of the rail (21) , such that the bar (24) is placed through the hole in the fork (25), to allow the development of a relative rotation between the bar (24) and the fork (25) during the performance of the test; the system being configured to be coupled to a testing machine, configured in turn to exert a force on the system, by means of an applicator (26) belonging to said machine.
    [2]
    2. The system of the preceding claim, wherein the cut portion (23) is located in the central part of the head (22) of the rail (21).
    [3]
    3. The system of any of the preceding claims, wherein the material of the bar (24) is high-strength steel with a hardness greater than 55HRC.
    [4]
    4. The system of any of the preceding claims, wherein the material of theFork (25) is high strength steel with a hardness greater than 55HRC.
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    同族专利:
    公开号 | 公开日
    ES2665577B2|2018-08-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN104111194A|2014-06-20|2014-10-22|天津大学|Clamp for connecting fatigue testing machine and welding guide rail test piece|
    CN204286930U|2014-12-19|2015-04-22|上海振华重工股份有限公司|For the loading fixture of track testing fatigue|
    法律状态:
    2018-08-21| FG2A| Definitive protection|Ref document number: 2665577 Country of ref document: ES Kind code of ref document: B2 Effective date: 20180821 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201700509A|ES2665577B2|2017-03-31|2017-03-31|System for testing tensile and compressive fatigue loads on the fasteners of a railway track within the same load cycle|ES201700509A| ES2665577B2|2017-03-31|2017-03-31|System for testing tensile and compressive fatigue loads on the fasteners of a railway track within the same load cycle|
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