Embedded rail steel rail longitudinal resistance testing device and testing method

Abstract

The invention discloses an embedded rail steel rail longitudinal resistance testing device and method. The embedded rail steel rail longitudinal resistance testing device comprises a base, and a vertical force applying assembly and a transverse force applying assembly are arranged on the base; a steel rail is installed on the inner side of the concrete base, limiting components are arranged on the concrete base and the base, and each limiting component comprises a limiting plate arranged at the bottom of the concrete base and a limiting groove formed in the top of the base and allowing the limiting plate to be inserted therein; the device has the beneficial effects that the limitation of splicing of the concrete base and the base is increased through the designed limiting part, so that the problem that the installation of the concrete base is difficult to limit in the prior art is effectively solved, the installation efficiency and precision of the concrete base are improved, and the overall stability of the testing device is ensured; through the designed protection part, the protection performance is improved, falling objects are effectively prevented from smashing downwards, the safety in the testing process is greatly improved, and normal operation of testing equipment is protected.

Description

Technical Field

[0001] The invention belongs to the technical field of rail longitudinal resistance testing, and in particular relates to an embedded track rail longitudinal resistance testing device and a testing method. Background Art

[0002] In the longitudinal resistance test of rails, magnetic loading technology has gradually attracted attention due to its unique advantages. Magnetic loading can accurately adjust the magnitude of the loading force by precisely controlling the magnetic field strength. Compared with some traditional mechanical loading methods, such as loading with weights or springs, magnetic loading can provide more continuous and finer force adjustment, thereby more accurately simulating the longitudinal forces of different sizes that the rails are subjected to in actual use, which helps to obtain more accurate test data. At the same time, magnetic loading is a non-contact loading method, which means that no mechanical damage or wear will be caused to the rail surface during the loading process. As a key component of railway tracks, the surface quality of rails is crucial to the safety and stability of train operation. The use of magnetic loading can avoid scratches, deformation and other problems that may be caused by contact loading, ensuring that the surface state of the rails before and after the test is basically consistent, thereby improving the reliability and repeatability of the test results, and also helping to protect the rail specimens so that they can be used for testing multiple times. However, the existing rail longitudinal resistance testing device still has many problems. During the rail installation process, the rail is embedded in the concrete seat, which is not conducive to increasing the installation limit of the concrete seat. The position of the concrete seat needs to be adjusted multiple times, resulting in low test efficiency and difficulty in ensuring installation accuracy. In addition, when applying lateral force, the existing device is not conducive to increasing protection and there is a safety hazard of falling objects, which seriously threatens the normal operation of the testing equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide an embedded track rail longitudinal resistance testing device and testing method, which increases the limitation of concrete seat installation through designed limiting components and improves installation efficiency and accuracy; and increases protection performance through designed protective components and improves the safety and reliability of the testing process.

[0004] To achieve the above object, the present invention provides the following technical solutions: an embedded track rail longitudinal resistance testing device, comprising a base, on which a vertical force applying component and a lateral force applying component are provided; A concrete seat, wherein a steel rail is mounted on the inner side of the concrete seat, and a limiting component is provided on the concrete seat and the base, wherein the limiting component includes a limiting plate provided at the bottom of the concrete seat, a limiting groove provided at the top of the base for inserting the limiting plate, and ribs symmetrically provided on the inner side of the limiting groove and capable of pressing against the limiting plate; The protective component includes a protective box installed on the top of the base and capable of protecting the lateral force applying component, and the rear end of the protective box is open.

[0005] As a preferred technical solution of the present invention, it also includes fasteners symmetrically arranged on the side surfaces of the concrete seat, and the fasteners are installed on the top of the base.

[0006] As a preferred technical solution of the present invention, it also includes installing a displacement sensor on the rear surface of the rail, and the fastener is an "L"-shaped structure.

[0007] As a preferred technical solution of the present invention, the vertical force applying assembly includes a plurality of support rods installed on the top of the base, a top plate arranged on the top of the plurality of support rods, a first movable plate movably arranged on the plurality of support rods, a lower electromagnet installed on the top of the first movable plate, an upper electromagnet that can be adsorbed and connected to the lower electromagnet, a plurality of first springs arranged between the lower electromagnet and the upper electromagnet, a first pressure rod arranged at the bottom of the upper electromagnet and passing through the first movable plate, a first pressure plate arranged at the bottom of the first pressure rod, a first axle seat arranged on the first pressure plate and can be pressed on the top of the rail, and a first force sensor is arranged between the first axle seat and the first pressure plate.

[0008] As a preferred technical solution of the present invention, it also includes a first cylinder symmetrically arranged on the top of the base, and the output end of the first cylinder is connected to the first movable plate.

[0009] As a preferred technical solution of the present invention, the lateral force applying assembly includes a first fastening plate and a second fastening plate installed inside the protective box, a plurality of horizontal rods arranged between the first fastening plate and the second fastening plate, a second movable plate movably arranged on the horizontal rod, a right electromagnet installed on the side surface of the second movable plate, a left electromagnet that can be adsorbed and connected to the right electromagnet, a plurality of second springs arranged between the right electromagnet and the left electromagnet, a second pressure rod arranged on the side surface of the left electromagnet and passing through the second movable plate, a second pressure plate arranged at one end of the second pressure rod, a second axle seat arranged on the second pressure plate and can be pressed on the front surface of the rail, and a second force sensor is arranged between the second axle seat and the second pressure plate.

[0010] As a preferred technical solution of the present invention, the side surface of the second fastening plate is provided with symmetrically distributed second cylinders, and the output ends of the second cylinders are connected to the second movable plate.

[0011] As a preferred technical solution of the present invention, it also includes a slide bar arranged on the right electromagnet and the left electromagnet, and a slide seat installed on the horizontal rod for the slide bar to slide.

[0012] As a preferred technical solution of the present invention, the side surface of the protective box is hinged with a box door, and a handle is provided on the box door. A fixed block is installed on the side surface of the protective box, and a threaded rod is threadedly connected to the fixed block. The handle is provided with a threaded groove for the threaded rod to be screwed in.

[0013] The present invention also discloses a method for testing an embedded track rail longitudinal resistance testing device, comprising the following steps: The steel rail is installed on the inner side of the concrete base. The concrete base is lifted and the steel rail is inserted into the inner part of the limited groove along the rib plate. The concrete base is fixed with fasteners. The first cylinder is started to drive the first movable plate to the required height and lock the first movable plate. The lower electromagnet and the upper electromagnet generate suction. The upper electromagnet approaches the lower electromagnet and drives the first pressure rod to move downward. The downward movement of the first pressure rod drives the first pressure plate to move downward. The downward movement of the first pressure plate drives the first shaft seat to press on the rail. The load is recorded by the first force sensor. Start the second cylinder to move the second movable plate to the desired position and lock the second movable plate. The right electromagnet and the left electromagnet generate suction. The left electromagnet approaches the right electromagnet and drives the second pressure rod to move. The movement of the second pressure rod drives the second pressure plate to move. The movement of the second pressure plate drives the second axle seat to move and press on the rail. The second force sensor is used to record the load.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The design of the limiting components increases the limitation of the splicing of the concrete seat and the base, effectively solving the problem of the difficulty in limiting the installation of the concrete seat in the existing technology, improving the efficiency and accuracy of the concrete seat installation, and ensuring the overall stability of the test device; Through the designed protective components, the protection performance is increased, which effectively prevents falling objects, greatly improves the safety of the test process and protects the normal operation of the test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of a partial cross-sectional structure of a side view of the protection box of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure of the F region; Figure 4 It is a schematic diagram of the slide structure of the present invention; Figure 5 For the present invention Figure 1 Schematic diagram of the enlarged structure of the E region; Figure 6 This is a schematic diagram of the splicing structure of the concrete seat and base of the present invention; In the figure: 1, base; 11, support rod; 12, protective box; 120, box door; 1201, plug handle; 121, fixing block; 1210, threaded rod; 13, concrete seat; 130, rail; 131, displacement sensor; 132, limiting plate; 14, limiting groove; 140, rib plate; 15, first cylinder; 2, top plate; 3, first movable plate; 41, lower electromagnet; 42, upper electromagnet; 420, first pressure rod; 4 3. First pressure plate; 430. First shaft seat; 51. First fastening plate; 52. Second fastening plate; 520. Second cylinder; 521. Horizontal rod; 53. Second movable plate; 61. Right electromagnet; 62. Left electromagnet; 620. Second pressure rod; 6201. Second pressure plate; 62010. Second shaft seat; 81. Iron core; 82. Excitation coil; 83. Outer magnetic ring of hollow cylinder; 84. Sliding bar; 85. Sliding seat; 9. Fasteners. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figures 1-6 The present invention provides an embedded track rail longitudinal resistance testing device, comprising A base 1 is provided with a vertical force applying component and a lateral force applying component; The concrete seat 13 has a steel rail 130 installed on its inner side. The concrete seat 13 increases the limitation and stability of the steel rail 130, and the concrete seat 13 and the base 1 are provided with a limiting component. The limiting component includes a limiting plate 132 arranged at the bottom of the concrete seat 13, which realizes the addition of the limiting plate 132, and a limiting groove 14 provided on the top of the base 1 for the limiting plate 132 to be inserted, which realizes the opening of the limiting groove 14, and ribs 140 symmetrically provided on the inner side of the limiting groove 14 and capable of being tightly pressed against the limiting plate 132. When the concrete seat 13 and the base 1 are spliced together, the limiting plate 132 is inserted into the inside of the limiting groove 14 along the ribs 140, thereby increasing the limitation of the splicing of the concrete seat 13 and the base 1, effectively solving the problem of the difficulty in limiting the installation of the concrete seat 13 in the prior art, improving the efficiency and accuracy of the installation of the concrete seat 13, and ensuring the overall stability of the testing device. The protective component includes a protective box 12 installed on the top of the base 1 and capable of protecting the lateral force application component. The protective box 12 increases the protective performance, effectively prevents falling objects, greatly improves the safety of the test process, and protects the normal operation of the test equipment. The rear end of the protective box 12 is open.

[0018] In this embodiment, preferably, fasteners 9 are further provided symmetrically on the side surfaces of the concrete seat 13 , and the fasteners 9 are mounted on the top of the base 1 by bolts, so as to increase the stability of the installation of the concrete seat 13 .

[0019] In this embodiment, preferably, a displacement sensor 131 is installed on the rear surface of the rail 130 to measure the longitudinal displacement of the rail 130 , and the fastener 9 is an “L”-shaped structure.

[0020] In this embodiment, preferably, the vertical force applying component includes a plurality of support rods 11 installed on the top of the base 1, realizing the addition of the support rods 11, a top plate 2 arranged on the top of the plurality of support rods 11, increasing the support for the top plate 2 by the support rods 11, a first movable plate 3 movably arranged on the plurality of support rods 11, the first movable plate 3 can move up and down along the support rods 11, a lower electromagnet 41 installed on the top of the first movable plate 3, realizing the addition of the lower electromagnet 41, an upper electromagnet 42 which can be adsorbed and connected to the lower electromagnet 41, the structures of the lower electromagnet 41 and the upper electromagnet 42 are symmetrical, and are arranged on the lower electromagnet 41. Multiple first springs between the upper electromagnet 42, the first spring supports the upper electromagnet 42, and can drive the upper electromagnet 42 to reset when the suction force disappears, a first pressure rod 420 is arranged at the bottom of the upper electromagnet 42 and passes through the first movable plate 3, when the upper electromagnet 42 moves, it drives the first pressure rod 420 to move, a first pressure plate 43 is arranged at the bottom of the first pressure rod 420, when the first pressure rod 420 moves, it drives the first pressure plate 43 to move, a first shaft seat 430 is arranged on the first pressure plate 43 and can press on the top of the rail 130, and a first force sensor is arranged between the first shaft seat 430 and the first pressure plate 43.

[0021] In this embodiment, preferably, a first cylinder 15 is further provided symmetrically on the top of the base 1 , and an output end of the first cylinder 15 is connected to the first movable plate 3 . Activating the first cylinder 15 can drive the first movable plate 3 to move up and down.

[0022] In this embodiment, preferably, the lateral force applying component includes a first fastening plate 51 and a second fastening plate 52 installed inside the protective box 12, which realizes the addition of the first fastening plate 51 and the second fastening plate 52, a plurality of horizontal rods 521 arranged between the first fastening plate 51 and the second fastening plate 52, which realizes the addition of the horizontal rod 521, a second movable plate 53 movably arranged on the horizontal rod 521, which realizes the addition of the second movable plate 53, a right electromagnet 61 installed on the side surface of the second movable plate 53, a left electromagnet 62 which can be adsorbed and connected to the right electromagnet 61, and is arranged between the right electromagnet 61 and the left electromagnet 62. Multiple second springs are provided between the left electromagnet 62, and the second spring supports the left electromagnet 62, and can drive the left electromagnet 62 to reset when the suction force disappears, a second pressure rod 620 is provided on the side surface of the left electromagnet 62 and passes through the second movable plate 53, when the left electromagnet 62 moves, it drives the second pressure rod 620 to move, a second pressure plate 6201 is provided at one end of the second pressure rod 620, when the second pressure rod 620 moves, it drives the second pressure plate 6201 to move, a second axle seat 62010 is provided on the second pressure plate 6201 and can be pressed on the front surface of the rail 130, and a second force sensor is provided between the second axle seat 62010 and the second pressure plate 6201.

[0023] The left electromagnet 62 includes an iron core 81, an excitation coil 82, and a hollow cylindrical outer magnetic ring 83. The iron core 81 is located inside the excitation coil 82, and the hollow cylindrical outer magnetic ring 83 establishes a magnetic circuit for the electromagnet. The bottom plate is located on one side of the hollow cylindrical outer magnetic ring 83, the iron core 81 and the excitation coil 82. When direct current is passed into the excitation coil 82, a magnetic flux can be generated. The excitation coil 82 is made of enameled flat copper wire to ensure good electrical conductivity. At the same time, in order to meet the heat dissipation effect, epoxy glass cloth rods are placed between several turns of the coil, and gaps are reserved for heat dissipation. Finally, it is tied with yarn tape and dipped in paint and dried to ensure that the coil does not spread out. The iron core is made of magnetic material with high magnetic conductivity to concentrate the magnetic flux and form a strong magnetic field. The pressure plate is made of aluminum alloy material with extremely low magnetic permeability to fix the excitation coil 82. The upper electromagnet 42 and the left electromagnet 62 have the same structure.

[0024] In this embodiment, preferably, the side surface of the second fastening plate 52 is provided with symmetrically distributed second cylinders 520, and the output end of the second cylinder 520 is connected to the second movable plate 53. Starting the second cylinder 520 can drive the second movable plate 53 to rise and fall.

[0025] In this embodiment, preferably, it also includes a slide bar 84 set on the right electromagnet 61 and the left electromagnet 62, and a slide seat 85 installed on the horizontal rod 521 for the slide bar 84 to slide. The cooperation of the slide bar 84 and the slide seat 85 is used to increase the guidance of the movement of the left electromagnet 62.

[0026] In this embodiment, preferably, the side surface of the protective box 12 is hinged with a box door 120, and the box door 120 can be opened and closed, which increases the convenience of maintenance and use. The box door 120 is provided with a handle 1201, which realizes the addition of the handle 1201. The side surface of the protective box 12 is installed with a fixed block 121, which realizes the addition of the fixed block 121. The fixed block 121 is threadedly connected with a threaded rod 1210, and the handle 1201 is provided with a threaded groove for the threaded rod 1210 to be screwed into. The threaded rod 1210 is rotated. When the threaded rod 1210 is tightened in the threaded groove, the closing of the box door 120 is increased.

[0027] Electromagnetic force loading achieves contactless loading, avoiding the friction caused by mechanical contact and significantly improving the accuracy of longitudinal resistance testing. Electromagnetic force loading can quickly change the load size by adjusting the current to adapt to different test conditions. The electromagnetic loading system has a fast response speed and can realize dynamic loading testing to simulate the dynamic load during train operation.

[0028] It should be noted that the specific structure and working principle of the right electromagnet 61, the left electromagnet 62, the lower electromagnet 41 and the upper electromagnet 42 in this application have been disclosed in a magnetic loading device and loading method with patent publication number CN111896380B.

[0029] A testing method for an embedded track rail longitudinal resistance testing device comprises the following steps: The steel rail 130 is installed on the inner side of the concrete base 13. The concrete base 13 is lifted and the steel rail 130 is inserted into the inner side of the limiting groove 14 along the rib 140. The concrete base 13 is fixed with the fastener 9. The first cylinder 15 is activated to drive the first movable plate 3 to the desired height and lock the first movable plate 3. The lower electromagnet 41 and the upper electromagnet 42 generate suction, and the upper electromagnet 42 approaches the lower electromagnet 41, driving the first pressure rod 420 to move downward. The downward movement of the first pressure rod 420 drives the first pressure plate 43 to move downward. The downward movement of the first pressure plate 43 drives the first shaft seat 430 to press on the rail 130, and the load is recorded by the first force sensor. Start the second cylinder 520 to move the second movable plate 53 to the desired position and lock the second movable plate 53. The right electromagnet 61 and the left electromagnet 62 generate suction. The left electromagnet 62 approaches the right electromagnet 61 and drives the second pressure rod 620 to move. The movement of the second pressure rod 620 drives the second pressure plate 6201 to move. The movement of the second pressure plate 6201 drives the second axle seat 62010 to move and press on the rail 130. The load is recorded by the second force sensor.

[0030] Although the embodiments of the present invention have been shown and described, as detailed above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An embedded track rail longitudinal resistance testing device, characterized by: include A base (1), wherein a vertical force applying component and a lateral force applying component are provided on the base (1); A concrete seat (13), wherein a steel rail (130) is installed on the inner side of the concrete seat (13), and a limiting component is provided on the concrete seat (13) and the base (1), wherein the limiting component includes a limiting plate (132) provided at the bottom of the concrete seat (13), a limiting groove (14) provided at the top of the base (1) for inserting the limiting plate (132), and a rib (140) symmetrically provided on the inner side of the limiting groove (14) and capable of pressing against the limiting plate (132); A protective component comprises a protective box (12) installed on the top of the base (1) and capable of protecting the lateral force application component, and the rear end of the protective box (12) is open.

2. The embedded track rail longitudinal resistance testing device according to claim 1, characterized in that: It also includes fasteners (9) symmetrically arranged on the side surface of the concrete seat (13), and the fasteners (9) are installed on the top of the base (1).

3. The embedded track rail longitudinal resistance testing device according to claim 2, characterized in that: It also includes a displacement sensor (131) mounted on the rear surface of the rail (130), and the fastener (9) is an "L"-shaped structure.

4. The embedded track rail longitudinal resistance testing device according to claim 1, characterized in that: The vertical force applying assembly comprises a plurality of support rods (11) mounted on the top of the base (1), a top plate (2) arranged on the top of the plurality of support rods (11), a first movable plate (3) movably arranged on the plurality of support rods (11), a lower electromagnet (41) mounted on the top of the first movable plate (3), an upper electromagnet (42) adsorbably connected to the lower electromagnet (41), a plurality of first springs arranged between the lower electromagnet (41) and the upper electromagnet (42), a first pressure rod (420) arranged at the bottom of the upper electromagnet (42) and passing through the first movable plate (3), a first pressure plate (43) arranged at the bottom of the first pressure rod (420), a first axle seat (430) arranged on the first pressure plate (43) and capable of pressing on the top of the rail (130), and a first force sensor arranged between the first axle seat (430) and the first pressure plate (43).

5. The embedded track rail longitudinal resistance testing device according to claim 4, characterized in that: It also includes a first cylinder (15) symmetrically arranged on the top of the base (1), and the output end of the first cylinder (15) is connected to the first movable plate (3).

6. The embedded track rail longitudinal resistance testing device according to claim 1, characterized in that: The lateral force applying assembly comprises a first fastening plate (51) and a second fastening plate (52) installed inside the protective box (12), a plurality of horizontal rods (521) arranged between the first fastening plate (51) and the second fastening plate (52), a second movable plate (53) movably arranged on the horizontal rod (521), a right electromagnet (61) installed on the side surface of the second movable plate (53), a left electromagnet (62) capable of being adsorbed and connected to the right electromagnet (61), a plurality of second springs arranged between the right electromagnet (61) and the left electromagnet (62), a second pressure rod (620) arranged on the side surface of the left electromagnet (62) and passing through the second movable plate (53), a second pressure plate (6201) arranged at one end of the second pressure rod (620), a second axle seat (62010) arranged on the second pressure plate (6201) and capable of pressing on the front surface of the rail (130), and a second force sensor arranged between the second axle seat (62010) and the second pressure plate (6201).

7. The embedded track rail longitudinal resistance testing device according to claim 6, characterized in that: The side surface of the second fastening plate (52) is provided with symmetrically distributed second cylinders (520), and the output ends of the second cylinders (520) are connected to the second movable plate (53).

8. The embedded track rail longitudinal resistance testing device according to claim 6, characterized in that: It also includes a slide bar (84) arranged on the right electromagnet (61) and the left electromagnet (62), and a slide seat (85) installed on the horizontal rod (521) for the slide bar (84) to slide.

9. The embedded track rail longitudinal resistance testing device according to claim 1, characterized in that: A box door (120) is hingedly connected to the side surface of the protection box (12), and a handle (1201) is provided on the box door (120). A fixing block (121) is installed on the side surface of the protection box (12), and a threaded rod (1210) is threadedly connected to the fixing block (121). A threaded groove for screwing the threaded rod (1210) is provided on the handle (1201).

10. A method for testing an embedded track rail longitudinal resistance testing device according to any one of claims 1 to 9, characterized in that: The steps include: The steel rail (130) is installed on the inner side of the concrete seat (13), the concrete seat (13) is picked up, and the steel rail (130) is inserted into the interior of the limiting groove (14) along the rib (140), and the concrete seat (13) is fixed using a fastener (9); The first cylinder (15) is started to drive the first movable plate (3) to move up and down to a desired height, and the first movable plate (3) is locked, the lower electromagnet (41) and the upper electromagnet (42) generate suction, the upper electromagnet (42) approaches the lower electromagnet (41), and drives the first pressure rod (420) to move downward, the first pressure rod (420) moves downward and drives the first pressure plate (43) to move downward, the first pressure plate (43) moves downward and drives the first shaft seat (430) to press on the rail (130), and the load is recorded by the first force sensor; The second cylinder (520) is started to drive the second movable plate (53) to move to the desired position, and the second movable plate (53) is locked. The right electromagnet (61) and the left electromagnet (62) generate suction force. The left electromagnet (62) approaches the right electromagnet (61) and drives the second pressure rod (620) to move. The movement of the second pressure rod (620) drives the second pressure plate (6201) to move. The movement of the second pressure plate (6201) drives the second shaft seat (62010) to move and press on the rail (130). The load is recorded by the second force sensor.

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