A tie anti-torsion test tool and test method

Abstract

The application provides a sleeper anti-torsion test tool and a test method, which comprise a fixing device and a torsion device; the fixing device comprises a top plate, a pressing plate and a heightening plate arranged in sequence from top to bottom, the pressing plate and a foundation platform are fixed together through a double-end screw rod, and the top plate and the heightening plate are fixed together through a double-end pull rod; a hydraulic oil cylinder is arranged between the top plate and the pressing plate, the hydraulic oil cylinder is used for adjusting the distance between the pressing plate and the heightening plate, and the pressing plate and the heightening plate are used in cooperation for fixing a front sleeper; the torsion device comprises a rotating clamp seat and a torque wrench, the rotating clamp seat is used for fixing a rear sleeper, the torque wrench is used for driving the rotating clamp seat to rotate and testing the anti-torsion of the sleeper, and the torque wrench is fixed together with the foundation platform through a supporting seat; the sleeper anti-torsion test tool of the application has a simple overall structure, low cost, is convenient for mounting and dismounting the sleeper, is convenient to operate and can greatly improve the test efficiency.

Description

Technical Field

[0001] This invention relates to the field of railway sleeper testing technology, and more specifically, to a railway sleeper torsional resistance testing fixture and testing method. Background Technology

[0002] The railway sleepers commonly used on railways are mostly concrete sleepers. A single concrete sleeper is typically 2.5 meters long and weighs over 300 kg. Due to their large size and heavy weight, testing the torsional resistance of a single concrete sleeper is very difficult. It usually requires large equipment exceeding 3 meters in height. Some equipment even requires the concrete sleeper to be erected for testing. This testing method not only involves expensive testing equipment and inconvenient operation, but also increases the risk of safety accidents. Summary of the Invention

[0003] In view of this, the present invention aims to provide a sleeper torsion test fixture and test method to solve the problems of difficulty in torsion testing of cement sleepers, high cost of test equipment and inconvenience in operation in the prior art.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A sleeper torsion resistance testing fixture includes a fixing device and a torsion device, both of which are fixed to a foundation platform.

[0006] The fixing device includes a top plate, a pressure plate, and a raised plate arranged sequentially from top to bottom. The pressure plate and the foundation platform are fixed together by double-ended threaded rods, and the top plate and the raised plate are fixed together by double-ended tie rods.

[0007] A hydraulic cylinder is provided between the top plate and the pressure plate. The upper end of the hydraulic cylinder is fixed to the top plate and the lower end is fixed to the pressure plate. The hydraulic cylinder is used to adjust the distance between the pressure plate and the raised plate. The pressure plate and the raised plate cooperate to fix the front sleeper.

[0008] The torsion device includes a rotating clamp and a torque wrench. The rotating clamp is used to fix the rear sleeper, and the torque wrench is used to drive the rotating clamp to rotate and perform a torsion test on the sleeper. The torque wrench is fixed to the foundation platform by a support base.

[0009] The sleeper torsion test fixture described in this application has a simple overall structure, low cost, facilitates the installation and disassembly of sleepers, is easy to operate, and can significantly improve testing efficiency.

[0010] Furthermore, the rotary clamping seat includes an L-shaped plate and a rotary clamping plate, the L-shaped plate includes a horizontal plate and a vertical plate, and the lower end of the vertical plate is perpendicularly connected to the rear end of the horizontal plate.

[0011] The vertical plate is provided with a limiting slot. Bolts are used to fix the rotating clamping plate to the vertical plate through the limiting slot. The bolts can move up and down along the limiting slot, so that the rotating clamping plate can move up and down relative to the horizontal plate. The rotating clamping plate and the horizontal plate work together to fix the rear sleeper.

[0012] This design is simple, easy to install and disassemble, and securely fixes the rear sleeper, preventing it from slipping or falling off.

[0013] Furthermore, a support plate is provided on the lower side of the raised plate, and the support plate is fixed to the foundation platform by anchor bolts to support the raised plate.

[0014] An arc-shaped plate is provided on the lower side of the horizontal plate. The arc-shaped plate is fixed to the foundation platform by anchor bolts to support the horizontal plate. The rotating clamp can rotate along the arc surface of the arc-shaped plate.

[0015] This configuration improves the stability of the fixing and torsion devices and prevents the sleepers from interfering with the foundation platform when rotating.

[0016] Furthermore, the top plate is provided with a notch for avoiding the double-ended lead screw, and the pad plate has the same structure as the top plate; the pressure plate is provided with a clearance hole for avoiding the double-ended tie rod.

[0017] This design facilitates the installation and removal of the fixing device.

[0018] Furthermore, the double-ended lead screw is provided with a first fixing nut, a second fixing nut, a third fixing nut and a fourth fixing nut. The first fixing nut and the second fixing nut are located on the upper side of the pressure plate, and the third fixing nut and the fourth fixing nut are located on the lower side of the pressure plate. The first fixing nut, the second fixing nut, the third fixing nut and the fourth fixing nut cooperate to fix the pressure plate.

[0019] The double-ended tie rod is equipped with a first adjusting nut and a second adjusting nut. The first adjusting nut is located on the upper side of the top plate, and the second adjusting nut is located on the lower side of the top plate. The first adjusting nut and the second adjusting nut are used together to adjust the distance between the pressure plate and the shim plate.

[0020] This setup not only securely fixes the fixing device and the foundation platform together, but also facilitates the adjustment of the distance between the top plate and the pressure plate relative to the raised plate, improving the flexibility and adaptability of the test and making it easier to operate.

[0021] Furthermore, it also includes a hydraulic device for driving a hydraulic cylinder and a torque wrench.

[0022] This setup is simple in structure, has high power output, and facilitates precise control of the hydraulic cylinder and torque wrench.

[0023] Furthermore, the torque wrench is equipped with a torque dial for displaying torque values.

[0024] The torque gauge can intuitively display the torque value, making it easy for operators to understand the current torque situation and ensuring the accuracy and reliability of the test results.

[0025] Furthermore, the rotary clamp is equipped with an angle gauge, which is used to detect the rotation angle of the rotary clamp.

[0026] The angle gauge can accurately measure the rotation angle of the rotating clamp, providing precise angle values ​​and ensuring the accuracy and reliability of the test results.

[0027] This invention also provides a method for testing the torsional resistance of railway sleepers, using the aforementioned railway sleeper torsional resistance testing fixture, comprising the following steps:

[0028] Step 1: Start the hydraulic device, adjust the first and second fixing nuts on the double-ended screw to move upward, and control the hydraulic cylinder to drive the pressure plate to move upward to the set position;

[0029] Step 2: Use an overhead crane to lift the sleeper and insert the front sleeper between the pressure plate and the slab.

[0030] Step 3: Install the torsion device and insert the rear sleeper between the turning clamp and the cross plate;

[0031] Step 4: Adjust the distance between the rotating clamp and the horizontal plate to fix the rear sleeper. Control the hydraulic cylinder to drive the pressure plate to move downward and press the front sleeper. Adjust the first and second fixing nuts on the double-ended screw to fix the pressure plate. At the same time, adjust the rotating clamp to make the horizontal plate parallel to the foundation platform and return the angle gauge value to zero.

[0032] Step 5: Connect the torque wrench to the hydraulic device and adjust the torque gauge to zero.

[0033] Step 6: Control the torque wrench to drive the rotating clamp to rotate and perform a torsion test on the sleeper. When the rotation angle of the rotating clamp reaches the set angle, control the rotating clamp to stop rotating and record the value of the torque dial.

[0034] Step 7: Control the rotating clamp to rotate in the opposite direction to the starting position and fix the sleeper to the overhead crane's hoisting rope;

[0035] Step 8: Move the rotating clamp upward to release the fixation of the rear sleeper, remove the torsion device, adjust the first and second fixing nuts on the double-ended screw to move upward, control the hydraulic cylinder to drive the pressure plate to move upward to the set position, and use the overhead crane to remove the front sleeper from between the pressure plate and the pad plate. The test is now complete.

[0036] This method facilitates the installation and removal of sleepers and ensures a secure fixation, significantly improving testing efficiency. During the testing process, the angle of torsion and stress can be monitored in real time, ensuring the accuracy and controllability of the testing process.

[0037] Furthermore, in step 1, the model of the support plate and the arc plate are selected according to the specifications of the sleeper to be tested. By adjusting the first and second adjusting nuts, the shim plate is moved upward, the support plate of the corresponding specifications is replaced, the shim plate is moved to the corresponding position and fixed, and finally the arc plate is replaced.

[0038] This setup facilitates testing of sleepers of different specifications, expanding the applicability of sleeper torsional resistance testing fixtures.

[0039] Compared with existing technologies, the sleeper torsional resistance testing fixture and method described in this invention have the following advantages:

[0040] 1) The overall structure is simple, the cost is low, the sleepers are easy to install and disassemble, the operation is convenient, and the testing efficiency can be greatly improved.

[0041] 2) The angle of sleeper torsion and stress can be monitored in real time during the test, ensuring the accuracy and controllability of the test process. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the sleeper torsion resistance testing fixture described in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the sleeper torsion resistance testing fixture from a second perspective according to an embodiment of the present invention;

[0044] Figure 3 This is a third-view structural schematic diagram of the sleeper torsion test fixture described in an embodiment of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Fixing device; 11. Top plate; 12. Pressure plate; 13. Elevation plate; 14. Hydraulic cylinder; 2. Torque device; 21. Turning clamp; 211. Horizontal plate; 212. Vertical plate; 2120. Limiting slot; 213. Turning clamp; 22. Torque wrench; 221. Torque dial; 23. Support base; 3. Foundation platform; 40. Double-ended lead screw; 41. First double-ended lead screw; 411. First fixing nut; 412. Second fixing nut; 413. Third fixing nut; 414. Fourth fixing nut 42. Set nut; 43. Second double-ended lead screw; 44. Third double-ended lead screw; 55. Fourth double-ended lead screw; 56. Double-ended tie rod; 57. First double-ended tie rod; 58. First adjusting nut; 59. Second adjusting nut; 50. Second double-ended tie rod; 51. Third double-ended tie rod; 52. Fourth double-ended tie rod; 63. Notch; 64. First notch; 65. Second notch; 66. Third notch; 67. Fourth notch; 100. Sleeper; 101. Front sleeper; 102. Torsion bar; 103. Rear sleeper. Detailed Implementation

[0047] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] like Figure 1-3 As shown, a sleeper torsion resistance testing fixture includes a fixing device 1 and a torsion device 2, both of which are fixed together with a foundation platform 3.

[0050] The fixing device 1 includes a top plate 11, a pressure plate 12 and a raised plate 13 arranged sequentially from top to bottom. The pressure plate 12 and the foundation platform 3 are fixed together by a double-ended threaded rod 40, and the top plate 11 and the raised plate 13 are fixed together by a double-ended tie rod 50.

[0051] A hydraulic cylinder 14 is provided between the top plate 11 and the pressure plate 12. The upper end of the hydraulic cylinder 14 is fixed to the top plate 11 and the lower end is fixed to the pressure plate 12. The hydraulic cylinder 14 is used to adjust the distance between the pressure plate 12 and the shim plate 13. The pressure plate 12 and the shim plate 13 cooperate to fix the front sleeper 101.

[0052] The torsion device 2 includes a rotating clamp 21 and a torque wrench 22. The rotating clamp 21 is used to fix the rear sleeper 103, and the torque wrench 22 is used to drive the rotating clamp 21 to rotate and perform a torsion test on the sleeper 100. The torque wrench 22 is fixed to the foundation platform 3 by a support 23.

[0053] The sleeper torsion test fixture described in this application has a simple overall structure and low cost. The distance between the pressure plate 12 and the pad plate 13 can be adjusted by the hydraulic cylinder 14, which facilitates the installation and disassembly of the sleeper 100. It is easy to operate and can greatly improve the testing efficiency.

[0054] Preferably, the foundation platform 3 is provided with a pre-embedded sleeve, and the lower end of the double-ended threaded rod 40 is connected and fixed together with the pre-embedded sleeve.

[0055] Preferably, the sleeper 100 includes a front sleeper 101, a torsion bar 102, and a rear sleeper 103 connected together in sequence.

[0056] Preferably, the top plate 11, pressure plate 12, and raised plate 13 are all configured as cuboids. The double-ended lead screw 40 includes a first double-ended lead screw 41, a second double-ended lead screw 42, a third double-ended lead screw 43, and a fourth double-ended lead screw 44. The first double-ended lead screw 41 is located at the left front corner of the pressure plate 12, the second double-ended lead screw 42 is located at the right front corner of the pressure plate 12, the third double-ended lead screw 43 is located at the right rear corner of the pressure plate 12, and the fourth double-ended lead screw 44 is located at the left rear corner of the pressure plate 12.

[0057] The top plate 11 is provided with a notch 60, which is used to avoid the double-ended lead screw 40. The notch 60 includes a first notch 61, a second notch 62, a third notch 63, and a fourth notch 64. The first notch 61 is located at the front left corner of the top plate 11 to avoid the first double-ended lead screw 41. The second notch 62 is located at the front right corner of the top plate 11 to avoid the second double-ended lead screw 42. The third notch 63 is located at the rear right corner of the top plate 11 to avoid the third double-ended lead screw 43. The fourth notch 64 is located at the rear left corner of the top plate 11 to avoid the fourth double-ended lead screw 44. The raised plate 13 has the same structure as the top plate 11.

[0058] The double-ended pull rod 50 includes a first double-ended pull rod 51, a second double-ended pull rod 52, a third double-ended pull rod 53, and a fourth double-ended pull rod 54. The first double-ended pull rod 51 and the fourth double-ended pull rod 54 are located between the first notch 61 and the fourth notch 64, and the second double-ended pull rod 52 and the third double-ended pull rod 53 are located between the second notch 62 and the third notch 63.

[0059] The pressure plate 12 is provided with clearance holes, which are used to avoid the double-ended tie rod 50. The clearance holes include a first clearance hole, a second clearance hole, a third clearance hole and a fourth clearance hole. The first clearance hole and the fourth clearance hole are located between the first double-ended lead screw 41 and the fourth double-ended lead screw 44. The second clearance hole and the third clearance hole are located between the second double-ended lead screw 42 and the third double-ended lead screw 43. The first clearance hole is used to avoid the first double-ended tie rod 51, the second clearance hole is used to avoid the second double-ended tie rod 52, the third clearance hole is used to avoid the third double-ended tie rod 53, and the fourth clearance hole is used to avoid the fourth double-ended tie rod 54.

[0060] As a preferred example of this application, the double-ended lead screw 40 is provided with a first fixing nut 411, a second fixing nut 412, a third fixing nut 413, and a fourth fixing nut 414. The first fixing nut 411 and the second fixing nut 412 are located on the upper side of the pressure plate 12, and the third fixing nut 413 and the fourth fixing nut 414 are located on the lower side of the pressure plate 12. The first fixing nut 411, the second fixing nut 412, the third fixing nut 413, and the fourth fixing nut 414 cooperate to fix the pressure plate 12. The fixing method of the second double-ended lead screw 42, the third double-ended lead screw 43, and the fourth double-ended lead screw 44 is the same as that of the first double-ended lead screw 41.

[0061] The double-ended tie rod 50 is provided with a first adjusting nut 511 and a second adjusting nut 512. The first adjusting nut 511 is located on the upper side of the top plate 11, and the second adjusting nut 512 is located on the lower side of the top plate 11. The first adjusting nut 511 and the second adjusting nut 512 are used to adjust the distance between the pressure plate 12 and the pad plate 13.

[0062] Specifically, when installing the front sleeper 101, loosening the nut on the double-ended screw 40 causes the pressure plate 12 to move upward. After the front sleeper 101 is inserted between the pressure plate 12 and the raised plate 13, the hydraulic cylinder 14 drives the pressure plate 12 to move downward to press the front sleeper 101. Then, the nut on the double-ended screw 40 is adjusted to fix the pressure plate 12. When the sleepers being tested are of the same model, there is no need to adjust the adjusting nut on the double-ended tie rod 50. When testing sleepers of different models, it is necessary to adjust the distance between the top plate 11 and the raised plate 13. This setting can not only firmly fix the fixing device 1 and the foundation platform 3 together, but also facilitate the adjustment of the distance between the top plate 11, the pressure plate 12 and the raised plate 13, improving the flexibility and adaptability of the test and making it easier to operate.

[0063] Preferably, a flat washer is provided between the top plate 11 and the first adjusting nut 511 and the second adjusting nut 512.

[0064] As a preferred example of this application, the rotary clamp 21 includes an L-shaped plate and a rotary clamp 213. The L-shaped plate includes a horizontal plate 211 and a vertical plate 212. The lower end of the vertical plate 212 is vertically connected to the rear end of the horizontal plate 211.

[0065] The vertical plate 212 is provided with a limiting slot 2120. The bolts fix the rotating clamp 213 to the vertical plate 212 together through the limiting slot 2120. The bolts can move in the vertical direction along the limiting slot 2120, so that the rotating clamp 213 can move up and down relative to the horizontal plate 211. The rotating clamp 213 and the horizontal plate 211 cooperate to fix the rear sleeper 103.

[0066] Specifically, when installing the rear sleeper 103, first move the rotating clamp 213 upward to maximize the distance between the rotating clamp 213 and the horizontal plate 211. Then, insert the rear sleeper 103 between the rotating clamp 213 and the horizontal plate 211. Next, move the rotating clamp 213 downward so that the rotating clamp 213 and the horizontal plate 211 work together to fix the rear sleeper 103. This setup is simple, easy to install and disassemble, and securely fixes the rear sleeper 103, preventing it from slipping or falling off.

[0067] Preferably, a flat washer is provided between the bolt and the vertical plate 212 to ensure the firmness of the fixation between the rotating clamp 213 and the horizontal plate 211.

[0068] Preferably, the vertical plate 212 is provided with two limiting slots 2120 from left to right, which are respectively used to fix the left and right sides of the rotating clamp 213 with bolts.

[0069] Preferably, the upper end of the rotating clamp 213 is provided with a first support plate and a second support plate. The lower end of the first support plate is vertically connected to the rear end of the rotating clamp 213. One end of the second support plate is connected to the rotating clamp 213, and the other end is connected to the first support plate. This arrangement can improve the stability of the rotating clamp 213 and enhance the clamping force of the rotating clamp 213 and the horizontal plate 211 on the rear sleeper 103.

[0070] As a preferred example of this application, a support plate is provided on the lower side of the raised plate 13. The support plate is fixed to the foundation platform 3 by anchor bolts to support the raised plate 13.

[0071] An arc-shaped plate is provided on the lower side of the horizontal plate 211. The arc-shaped plate is fixed to the foundation platform 3 by anchor bolts to support the horizontal plate 211. The rotating clamp 21 can rotate along the arc surface of the arc-shaped plate 24.

[0072] Specifically, the support plate and the arc plate are at the same height. When testing the sleeper, this setting can improve the stability of the fixing device 1 and the torsion device 2, and also prevent the sleeper 100 from interfering with the foundation platform 3 when rotating.

[0073] As a preferred example of this application, a hydraulic device is also included for driving the hydraulic cylinder 14 and the torque wrench 22.

[0074] Specifically, this setup has a simple structure, high power output, and facilitates precise control of the hydraulic cylinder 14 and torque wrench 22.

[0075] As a preferred example of this application, the torque wrench 22 is provided with a torque dial 221, which is used to display the torque value.

[0076] Specifically, the torque dial 221 can intuitively display the torque value, making it easy for operators to understand the current torque situation, facilitating real-time monitoring and control, and ensuring the accuracy and reliability of test results.

[0077] Preferably, the torque dial 221 is equipped with a torque recorder, which is used to record torque values ​​for convenient subsequent data analysis and recording.

[0078] Preferably, the rotary clamp 21 is provided with a signal transmitter, which is used to transmit the test results to an external user terminal.

[0079] Preferably, the rotary clamp 21 is provided with a data transmission interface, which is used to connect to an external device and transmit test data to the external device.

[0080] As a preferred example of this application, the rotary clamp 21 is provided with an angle meter, which is used to detect the rotation angle of the rotary clamp 21.

[0081] Specifically, the angle gauge can accurately measure the rotation angle of the rotating clamp 21, providing precise angle values ​​to ensure the accuracy and reliability of the test results.

[0082] This invention also provides a method for testing the torsional resistance of railway sleepers, using the aforementioned railway sleeper torsional resistance testing fixture, comprising the following steps:

[0083] Step 1: Start the hydraulic device, adjust the first fixing nut 411 and the second fixing nut 412 on the double-ended lead screw 40 to move upward, and control the hydraulic cylinder 14 to drive the pressure plate 12 to move upward to the set position;

[0084] Step 2: Use an overhead crane to lift the sleeper 100 and insert the front sleeper 101 between the pressure plate 12 and the shim plate 13;

[0085] Step 3: Install the torsion device 2 and insert the rear sleeper 103 between the turning clamp 213 and the horizontal plate 211;

[0086] Step 4: Adjust the distance between the rotating clamp 213 and the horizontal plate 211 to fix the rear sleeper 103. Control the hydraulic cylinder 14 to drive the pressure plate 12 to move downward and press the front sleeper 101. Adjust the first fixing nut 411 and the second fixing nut 412 on the double-headed screw 40 to fix the pressure plate 12. At the same time, adjust the rotating clamp 21 to make the horizontal plate 211 parallel to the foundation platform 3 and the angle instrument value is returned to zero.

[0087] Step 5: Connect the torque wrench 22 to the hydraulic device and adjust the value of the torque dial 221 to zero;

[0088] Step 6: Control the torque wrench 22 to drive the rotating clamp 21 to rotate and perform a torsion test on the sleeper 100. When the rotation angle of the rotating clamp 21 reaches the set angle, control the rotating clamp 21 to stop rotating and record the value of the torque dial 221.

[0089] Step 7: Control the rotating clamp 21 to rotate in the opposite direction to the starting position, and fix the sleeper 100 to the hoisting rope of the overhead crane;

[0090] Step 8: Move the rotating clamp 213 upward to release the fixation of the rear sleeper 103, remove the torsion device 2, adjust the first fixing nut 411 and the second fixing nut 412 on the double-ended screw 40 to move upward, control the hydraulic cylinder 14 to drive the pressure plate 12 to move upward to the set position, and use the overhead crane to remove the front sleeper 101 from between the pressure plate 12 and the pad plate 13. The test is over.

[0091] Specifically, this method facilitates the installation and removal of the sleeper 100, and ensures a secure fixation, significantly improving testing efficiency. During the testing process, the angle of torsion and stress can be monitored in real time, ensuring the accuracy and controllability of the testing process.

[0092] As a preferred example of this application, in step 1, the model of the support plate and the arc plate are selected according to the specifications of the sleeper 100 to be tested. By adjusting the first adjusting nut 511 and the second adjusting nut 512, the shim plate 13 is moved upward. The support plate 14 of the corresponding specifications is replaced. The shim plate 13 is then moved to the corresponding position and fixed. Finally, the arc plate 24 is replaced.

[0093] Specifically, when testing sleepers 100 of different specifications, it is necessary to select the model of the support plate and the arc plate according to the specifications of the sleeper 100 to be tested, and at the same time adjust the distance between the top plate 11 and the pad plate 13. This setting facilitates the testing of sleepers of different specifications and expands the applicability of the sleeper torsion test fixture.

[0094] The sleeper torsion test fixture and test method described in this application have the following advantages: 1) The overall structure is simple and the cost is low. It is convenient to install and disassemble the sleeper 100, and the operation is convenient, which can greatly improve the test efficiency; 2) During the test, the torsion angle and stress of the sleeper 100 can be monitored in real time to ensure that the test process is accurate and controllable.

[0095] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A testing fixture for the torsional resistance of railway sleepers, characterized in that, The system includes a fixing device (1) and a torsion device (2), both of which are fixed together with the foundation platform (3). The fixing device (1) includes a top plate (11), a pressure plate (12), and a raised plate (13) arranged sequentially from top to bottom. The pressure plate (12) and the foundation platform (3) are fixed together by a double-ended screw rod (40), and the top plate (11) and the raised plate (13) are fixed together by a double-ended tie rod (50). A hydraulic cylinder (14) is provided between the top plate (11) and the pressure plate (12), and the upper end of the hydraulic cylinder (14) is fixed together with the top plate (11). The lower end is fixed together with the pressure plate (12). The hydraulic cylinder (14) is used to adjust the distance between the pressure plate (12) and the pad plate (13). The pressure plate (12) and the pad plate (13) cooperate to fix the front sleeper (101). The torsion device (2) includes a rotating clamp (21) and a torque wrench (22). The rotating clamp (21) is used to fix the rear sleeper (103). The torque wrench (22) is used to drive the rotating clamp (21) to rotate and perform a torsion test on the sleeper (100). The torque wrench (22) is fixed together with the foundation platform (3) through the support seat (23).

2. The sleeper torsional resistance testing fixture according to claim 1, characterized in that, The rotating clamp (21) includes an L-shaped plate and a rotating clamp (213). The L-shaped plate includes a horizontal plate (211) and a vertical plate (212). The lower end of the vertical plate (212) is vertically connected to the rear end of the horizontal plate (211). The vertical plate (212) is provided with a limiting slot (2120). Bolts fix the rotating clamp (213) and the vertical plate (212) together through the limiting slot (2120). The bolts can move in the vertical direction along the limiting slot (2120), so that the rotating clamp (213) moves up and down relative to the horizontal plate (211). The rotating clamp (213) and the horizontal plate (211) cooperate to fix the rear sleeper (103).

3. The sleeper torsional resistance testing fixture according to claim 2, characterized in that, A support plate is provided on the lower side of the raised plate (13), and the support plate is fixed together with the foundation platform (3) by anchor bolts to support the raised plate (13); an arc plate is provided on the lower side of the horizontal plate (211), and the arc plate is fixed together with the foundation platform (3) by anchor bolts to support the horizontal plate (211); the rotating clamp (21) can rotate along the arc surface of the arc plate (24).

4. The sleeper torsional resistance testing fixture according to claim 3, characterized in that, The top plate (11) is provided with a notch (60) for avoiding the double-ended lead screw (40). The raised plate (13) has the same structure as the top plate (11). The pressure plate (12) is provided with a clearance hole for avoiding the double-ended tie rod (50).

5. The sleeper torsional resistance testing fixture according to claim 4, characterized in that, The double-ended lead screw (40) is provided with a first fixing nut (411), a second fixing nut (412), a third fixing nut (413), and a fourth fixing nut (414). The first fixing nut (411) and the second fixing nut (412) are located on the upper side of the pressure plate (12), and the third fixing nut (413) and the fourth fixing nut (414) are located on the lower side of the pressure plate (12). 413) and the fourth fixing nut (414) are used to fix the pressure plate (12); the double-headed tie rod (50) is provided with a first adjusting nut (511) and a second adjusting nut (512). The first adjusting nut (511) is located on the upper side of the top plate (11), and the second adjusting nut (512) is located on the lower side of the top plate (11). The first adjusting nut (511) and the second adjusting nut (512) are used to adjust the distance between the pressure plate (12) and the pad plate (13).

6. The sleeper torsional resistance testing fixture according to claim 5, characterized in that, It also includes a hydraulic device for driving a hydraulic cylinder (14) and a torque wrench (22).

7. The sleeper torsional resistance testing fixture according to claim 6, characterized in that, The torque wrench (22) is equipped with a torque dial (221) for displaying torque values.

8. The sleeper torsion resistance testing fixture according to claim 7, characterized in that, The rotary clamp (21) is equipped with an angle gauge, which is used to detect the rotation angle of the rotary clamp (21).

9. A method for testing the torsional resistance of railway sleepers, using the torsional resistance testing fixture described in claim 8, characterized in that, The steps include: Step 1: Start the hydraulic device, adjust the first fixing nut (411) and the second fixing nut (412) on the double-ended screw (40) to move upward, and control the hydraulic cylinder (14) to drive the pressure plate (12) to move upward to the set position; Step 2: Use the overhead crane to lift the sleeper (100) and insert the front sleeper (101) between the pressure plate (12) and the pad plate (13); Step 3: Install the torsion device (2) and insert the rear sleeper (103) into the turning clamp (213) and the cross plate. (211) between; Step 4: Adjust the distance between the rotating clamp (213) and the horizontal plate (211), fix the rear sleeper (103), control the hydraulic cylinder (14) to drive the pressure plate (12) to move downward to press the front sleeper (101), adjust the first fixing nut (411) and the second fixing nut (412) on the double-headed screw (40) to fix the pressure plate (12), and at the same time adjust the rotating clamp (21) so that the horizontal plate (211) is parallel to the foundation platform (3), and the angle instrument Step 5: Connect the torque wrench (22) to the hydraulic device and adjust the torque dial (221) to zero; Step 6: Control the torque wrench (22) to drive the rotating clamp (21) to rotate and perform a torsion test on the sleeper (100). When the rotation angle of the rotating clamp (21) reaches the set angle, control the rotating clamp (21) to stop rotating and record the value of the torque dial (221); Step 7: Control the rotating clamp (21) to rotate in the opposite direction to the starting position and place the sleeper (100) in the center. The sleeper (100) is fixed on the hoisting rope of the overhead crane; Step 8: Move the rotating clamp (213) upward to release the fixation of the rear sleeper (103), remove the torsion device (2), adjust the first fixing nut (411) and the second fixing nut (412) on the double-headed screw (40) to move upward, control the hydraulic cylinder (14) to drive the pressure plate (12) to move upward to the set position, and use the overhead crane to remove the front sleeper (101) from between the pressure plate (12) and the pad plate (13). The test ends.

10. The sleeper torsional resistance testing method according to claim 9, characterized in that, In step 1, select the model of the support plate and the arc plate according to the specifications of the sleeper (100) to be tested. By adjusting the first adjusting nut (511) and the second adjusting nut (512), the shim plate (13) is moved upward. Replace the support plate of the corresponding specifications, move the shim plate (13) to the corresponding position and fix it. Finally, replace the arc plate (24).

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