A rail tilting performance detection device applied to a railway site

Abstract

The application discloses a rail tilting performance detection device applied to a railway site, which comprises a vertical loading mechanism arranged across rails and capable of providing vertical load to the rails and a horizontal loading mechanism arranged between two parallel rails and capable of providing horizontal load to the rails. The rail tilting performance detection device can reflect the installation state of the rails when fasteners are buckled in a continuous line.

Description

Technical Field

[0001] This invention relates to the field of track inspection, and more specifically, to a rail tilting performance testing device applied in railway sites. Background Technology

[0002] When a train travels at high speed on the track, the rails are the track components that directly bear the load. The wheels exert not only vertical eccentric forces on the rails but also horizontal forces. Under the action of lateral loads or eccentric vertical loads, the rails will undergo torsional deformation, resulting in a dynamic increase in track gauge and reducing train safety. Therefore, research on the on-site detection of rail tilting performance in railway tracks is very important.

[0003] Existing research on rail overturning behavior is limited to the laboratory and cannot accurately reflect the real-time status and overturning behavior of rails during on-site installation. Therefore, it is particularly important to design a rail overturning performance testing device applicable to railway sites. Summary of the Invention

[0004] The purpose of this invention is to provide a rail tilting performance testing device for use in railway sites. This rail tilting performance testing device can reflect the installation status of the rail when fasteners are clamped in a continuous line.

[0005] To achieve the above objectives, the present invention provides a rail overturning performance testing device for use in railway sites. The rail overturning performance testing device includes a vertical loading mechanism that spans across the rail and is capable of providing vertical loads to the rail, and a horizontal loading mechanism that is disposed between two parallel rails and is capable of providing horizontal loads to the rail.

[0006] Preferably, the vertical loading mechanism includes a reaction frame detachably fixed to the sleeper, on which a first loading unit is mounted for vertical loading toward the rail.

[0007] Preferably, the reaction frame includes a top plate, connecting rods, and a connecting plate. The connecting plate is fixed to the sleeper by fasteners and existing spiral spikes. The top plate and the connecting plate are connected by multiple connecting rods. The first loading unit is installed on the top plate.

[0008] Preferably, the first loading unit includes a vertical loading base, a first pressure sensor, and a first hydraulic jack, which are connected sequentially from bottom to top.

[0009] Preferably, the first pressure sensor is a hollow pressure sensor, the first hydraulic jack is a hollow hydraulic jack, and the vertical loading iron base is provided with an upper push rod that passes through the hollow pressure sensor, the hollow hydraulic jack and the top plate in sequence. The upper end of the upper push rod is locked to the top plate by a nut.

[0010] Preferably, the bottom of the vertical loading base is provided with a U-shaped groove that cooperates with the loading end of the horizontal loading mechanism.

[0011] Preferably, the horizontal loading mechanism includes a horizontal loading beam and a second loading unit mounted on the horizontal loading beam, wherein the two ends of the second loading unit act on the sides of the corresponding rails.

[0012] Preferably, the second loading unit includes a second hydraulic jack, and the two ends of the second hydraulic jack are respectively connected to horizontal jacks through A jack sleeve and B jack sleeve. The end of the horizontal jack away from the second hydraulic jack is connected to a rail head iron.

[0013] Preferably, the end of the rail head top iron is provided with a notch or groove that fits against the side of the rail head top.

[0014] Preferably, a second pressure sensor is provided in the A top rod sleeve and / or the B top rod sleeve.

[0015] According to the above technical solution, the rail tilting performance detection device of the present invention can reflect the installation status of the rail when the fasteners are clamped in a continuous line.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the rail tilting performance testing device being assembled on a railway site.

[0019] Figure 2 This is a schematic diagram of the vertical loading mechanism being assembled on a railway site.

[0020] Figure 3 This is a schematic diagram of the horizontal loading mechanism being assembled on a railway site.

[0021] Figure 4 It is a diagram of rail torsion.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Vertical loading mechanism; 2-Horizontal loading mechanism; 3-Continuous track on railway site; 4-Top plate; 5-Nut; 6-Connecting rod; 7-Connecting plate; 8-Spiral spike; 9-Sleeve; 10-Hollow hydraulic jack; 11-Hollow pressure sensor; 12-Vertical loading base; 13-Rail; 14-Rail head top iron; 15-Horizontal loading beam; 16-Horizontal top rod; 17-A top rod sleeve; 18-Second hydraulic jack; 19-B top rod sleeve; 20-Support plate. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0025] In this invention, unless otherwise stated, directional terms such as "up, down, left, right, front, back, inside, outside" in the terminology only represent the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as a limitation on the term.

[0026] See Figure 1 The rail tilting performance testing device shown is applied to railway sites. The rail tilting performance testing device includes a vertical loading mechanism 1 that is installed across the rail 13 and can provide vertical load to the rail 13, and a horizontal loading mechanism 2 that is installed between two parallel rails 13 and can provide horizontal load to the rail 13.

[0027] The purpose of this invention is achieved as follows: by installing two vertical loading mechanisms 1 on the continuous track 3 at the railway site to vertically load the rail 13, and at the same time by using a horizontal loading mechanism 2 to horizontally load the rail 13, the overturning performance of the rail 13 at the railway site is simulated when a train passes by.

[0028] By implementing the above technical solution, compared with the prior art, the advantages of this invention are that it provides a convenient and simple device for detecting the overturning performance of rails 13 in continuous railway tracks on-site, with the error of the test results within a controllable range. This rail overturning performance detection device applied to railway sites compensates for the shortcomings of laboratory testing and reflects the overturning pattern of rails 13 in real time.

[0029] like Figure 2 As shown, in this embodiment, the vertical loading mechanism 1 includes a reaction frame detachably fixed to the sleeper 9, on which a first loading unit is mounted for vertical loading toward the rail 13. By installing the reaction frame on the sleeper 9 on-site, the problem of not being able to provide reaction force on-site is overcome. When the first loading unit applies a vertical force toward the rail 13, the reaction frame provides support.

[0030] In this embodiment, to further provide a reaction frame, the reaction frame includes a top plate 4, connecting rods 6, and a connecting plate 7. The connecting plate 7 is fixed to the sleeper 9 by fasteners and existing spiral spikes 8. The top plate 4 and the connecting plate 7 are connected by multiple connecting rods 6. The first loading unit is installed on the top plate 4. This further provides a method for on-site installation of the reaction frame: symmetrical holes are drilled on the sleepers 9 at both ends of the rail 13, and pre-embedded sleeves are installed. Then, spiral spikes 8 are used to lock the connecting plate 7 to the pre-embedded sleeves, fixing the connecting plate 7 to the sleeper 9. Four connecting rods 6 are connected to the connecting plate 7 by threads, and the top plate 4 is installed using nuts 5 to transmit the reaction force of the vertical loading force. An elongated slot is cut at the center of the top plate 4 for fine-tuning of the loading position.

[0031] In this embodiment, the first loading unit includes a vertical loading base 12, a first pressure sensor, and a first hydraulic jack, which are connected sequentially from bottom to top. The shape of the vertical loading base 12 is as follows: Figure 2 As shown, the overall shape is V-shaped. The purpose of making the top wider is to facilitate the support of the first pressure sensor, and the purpose of making the bottom narrower is to concentrate the force and transmit it to the rail 13, simulating the stress situation of the rail 13.

[0032] In this embodiment, the first pressure sensor is a hollow pressure sensor 11, the first hydraulic jack is a hollow hydraulic jack 10, and the vertical loading base 12 is provided with an upper push rod that passes sequentially through the hollow pressure sensor 11, the hollow hydraulic jack 10, and the top plate 4. The upper end of the upper push rod is locked to the top plate 4 by a nut 5. One end of the vertical loading base 12 presses against the rail 13, and the other end passes through the hollow pressure sensor 11, the hollow hydraulic jack 10, and the reaction frame top plate 4. When the hollow hydraulic jack 10 applies vertical load to the rail 13 via a hydraulic pump, the pressure value can be detected in real time by the hollow pressure sensor 11, and the reaction force can be supported by the vertical loading mechanism 1.

[0033] In this embodiment, the bottom of the vertical loading iron base 12 is provided with a U-shaped groove that cooperates with the loading end of the horizontal loading mechanism 2.

[0034] In one embodiment, the U-shaped groove is used in conjunction with the rail head top iron 14, that is, the upper part of the rail head top iron 14 can be inserted into the U-shaped groove for left and right position limitation, thereby ensuring that the horizontal loading mechanism 2 and the vertical loading mechanism 1 can be located on the same straight line during online assembly, that is, arranged in the direction parallel to the sleeper 9. This can avoid data errors caused by position deviation. In addition, it can also avoid the generation of torsional force along the length direction of the rail 13 due to the non-intersection of the force points.

[0035] like Figure 3 As shown, in this embodiment, the horizontal loading mechanism 2 includes a horizontal loading beam 15 and a second loading unit mounted on the horizontal loading beam 15. The two ends of the second loading unit act on the sides of the corresponding rails 13. Using the horizontal loading beam 15 as the bearing mechanism for mounting the second loading unit improves the stability of horizontal force application. Furthermore, the side of the horizontal loading beam 15 can be provided with side wings, each with an elongated hole through which a connecting rod 6 passes. This allows for quick positioning of the horizontal loading beam 15, and combined with the positioning effect of the U-shaped groove, further improves the accuracy of the assembly position and the accuracy of the measurement data.

[0036] In this embodiment, the second loading unit includes a second hydraulic jack 18. Both ends of the second hydraulic jack 18 are connected to horizontal jacks 16 via A-jack sleeve 17 and B-jack sleeve 19, respectively. The end of the horizontal jack 16 furthest from the second hydraulic jack 18 is connected to a rail head iron 14. The horizontal loading mechanism 2 provides lateral loading force through the second hydraulic jack 18, with one end connected to A-jack sleeve 17 and the other end connected to B-jack sleeve 19. The other ends of the two jack sleeves are connected to the horizontal jacks 16 for transmitting lateral loads. The rail head iron 14 is threadedly connected to the horizontal jacks 16 and pressed onto the rail 13. Simultaneously, the horizontal loading mechanism 2 is positioned and supported by a horizontal loading beam 15 and a support plate 20. When the horizontally placed jack is loaded, the loading force is transmitted through the jack sleeves and the horizontal jacks 16 to the rail head iron 14, laterally loading the rail 13.

[0037] In this embodiment, the end of the rail head top iron 14 is provided with a notch or groove that fits against the side of the rail head 13. The notch or groove restricts its longitudinal and lateral displacement, such as... Figure 4 As shown, the upper surface of the notch is set as a plane, and the side surface is provided with a circular arc loading protrusion, so that the loading force is concentrated on a horizontal line, which facilitates the calculation of the force and reduces the error caused by the large force surface.

[0038] In this embodiment, a second pressure sensor is provided in the A top rod sleeve 17 and / or the B top rod sleeve 19. The second pressure sensor is used to measure the lateral loading force.

[0039] In this embodiment, a support plate 20 for supporting the second hydraulic jack 18 is provided at the bottom of the horizontal loading beam 15. The second hydraulic jack 18 is a double-shaft solid jack.

[0040] like Figure 4 As shown, rail 13 is subjected to a lateral load F h and vertical eccentric load F v When both forces act together, according to the torque balance equation, the torsional torque T = F h (h-16)-F v e.

[0041] As a further optimization of the present invention, the hollow hydraulic jack 10 and the second hydraulic jack 18 are externally connected to a hydraulic manual pump or a portable rechargeable hydraulic pump for driving their operation. The hydraulic pump is connected to the hollow hydraulic jack 10 and the second hydraulic jack 18 through a high-pressure oil pipe to provide oil pressure respectively.

[0042] As a further optimization of the present invention, the drilling position on the sleeper 9 is adjusted according to the track type and fastener model of the railway site to meet different structural requirements.

[0043] As a further optimization of the present invention, the pressure sensor used can be selected from different structures and models, as long as it can meet the requirements of measuring the pressure of the jack on the rail 13.

[0044] As a further optimization of the present invention, the acquisition component connected to the pressure sensor and the online detection and analysis component connected to the acquisition component are connected to a portable adjustable voltage mobile power supply via a data cable to power both of them in order to complete the acquisition of load and displacement in the overturning performance test of rail 13.

[0045] Of course, when necessary, displacement sensors should also be installed to measure the lateral displacement of rail 13.

[0046] Taking ballastless track as an example, the WJ-8 type fastener presses the rail 13 onto the sleeper 9. The standard installation and filling is 0-0.5mm between the lower jaw of the front end of the fastener's elastic clip and the gauge baffle. The rail 13 has a model of 60kg / m. The two vertical loading mechanisms 1 and one horizontal loading mechanism 2 of the railway site rail tilting performance testing device simultaneously load the rail 13 to simulate the tilting performance test of the rail 13 when a train passes by.

[0047] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0049] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A device for detecting the tilting performance of a steel rail applied to a railway site, characterized in that, The rail overturning performance testing device includes a vertical loading mechanism (1) that spans across the rail (13) and is capable of providing a vertical load to the rail (13), and a horizontal loading mechanism (2) that is set between two parallel rails (13) and is capable of providing a horizontal load to the rail (13). The vertical loading mechanism (1) includes a reaction frame that is detachably fixed to the sleeper (9), and a first loading unit that is vertically loaded toward the rail (13) is installed on the reaction frame. The first loading unit includes a vertical loading iron base (12), a first pressure sensor and a first hydraulic jack, which are connected sequentially from bottom to top. The bottom of the vertical loading iron base (12) is provided with a U-shaped groove that cooperates with the loading end of the horizontal loading mechanism (2); The horizontal loading mechanism (2) includes a horizontal loading beam (15) and a second loading unit installed on the horizontal loading beam (15), with the two ends of the second loading unit acting on the sides of the corresponding rails (13); The second loading unit includes a second hydraulic jack (18), and the two ends of the second hydraulic jack (18) are respectively connected to a horizontal jack (16) through an A jack sleeve (17) and a B jack sleeve (19). The end of the horizontal jack (16) away from the second hydraulic jack (18) is connected to a rail head iron (14). The end of the rail head top iron (14) is provided with a notch groove that fits against the side of the top of the rail (13); The U-shaped groove is used in conjunction with the rail head top iron (14). The upper part of the rail head top iron (14) can be inserted into the U-shaped groove for left and right position limitation, so as to ensure that the horizontal loading mechanism (2) and the vertical loading mechanism (1) can be located on the same plane during online assembly.

2. The rail tilting performance detection device applied to a railway site according to claim 1, characterized in that, The reaction frame includes a top plate (4), connecting rods (6) and a connecting plate (7). The connecting plate (7) is fixed to the sleeper (9) by fasteners and original spiral spikes (8). The top plate (4) and the connecting plate (7) are connected by multiple connecting rods (6). The first loading unit is installed on the top plate (4).

3. The rail tilting performance detection device applied to a railway site according to claim 1, characterized in that, The first pressure sensor is a hollow pressure sensor (11), the first hydraulic jack is a hollow hydraulic jack (10), and the vertical loading iron base (12) is provided with an upper push rod that passes through the hollow pressure sensor (11), the hollow hydraulic jack (10) and the top plate (4) in sequence. The upper end of the upper push rod is locked to the top plate (4) by a nut (5).

4. The rail tilting performance detection device applied to a railway site according to claim 1, characterized in that, A second pressure sensor is provided in the A top rod sleeve (17) and / or the B top rod sleeve (19).

Images