A prestressed steel strand performance detection equipment

Abstract

The present application relates to the field of steel strand detection, disclose a kind of prestressed steel strand performance detection equipment, including cabinet, the cabinet top is set by overturning inclined structure overturning plate, four corners of the overturning plate top are connected with fixed strip, the top end of the fixed strip of left and right sides is respectively connected with two longitudinal plates, two the longitudinal plate is set switching plate by switching structure, three first transverse grooves are formed in the left side of the switching plate top, three second transverse grooves are formed in the right side of the switching plate top, the second moving plate is slidably arranged in the first transverse groove, three steel strands can be directly clamped before detection by first clamping structure, in the detection process of different states of steel strand by pulling detection structure and overturning inclined structure, switching structure is matched, can automatically switch the steel strand to be detected to detection position, carry out detection, such operation is more labor-saving, convenient, improve detection efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of steel strand testing, and in particular to a device for testing the performance of prestressed steel strands. Background Technology

[0002] Stressed steel strand is a special type of steel strand with high strength and high toughness. It is mainly used in infrastructure projects such as long-span bridges, high-rise buildings, and dams. After production, in order to ensure the quality of the steel strand, performance testing equipment is required to perform performance testing on the steel strand.

[0003] A search revealed that patent CN119935742B discloses a prestressed steel strand performance testing device. This device can perform tensile strength and fatigue strength tests on steel strands in both horizontal and inclined states. This simulates the inclined state of steel strands in actual engineering applications (such as bridges and cranes), assesses the impact of multi-directional forces on the performance of steel strands, and effectively increases the diversity of testing through multi-state and multi-mode testing. This makes the device more closely reflect the actual use of steel strands, improves the accuracy of test results, and makes the test results more realistic and representative.

[0004] However, in the actual testing process, the performance of the steel strand needs to be tested three times. The first time, the steel strand is pulled directly until it breaks. The second time, after the steel strand is straightened, it is impacted by an impact unit to support the breakage of the steel strand. The third time, when the steel strand is in a tilted and straightened state, it is impacted by an impact unit until it breaks. This is how the performance of the steel strand is tested. However, in actual operation, if one of the steel strands breaks and testing continues, the broken steel strand needs to be loosened again and replaced with a new one to continue testing. This repeated operation is time-consuming, labor-intensive, and reduces work efficiency. Therefore, there is room for improvement. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a prestressed steel strand performance testing device.

[0006] The prestressed steel strand performance testing equipment provided by this invention adopts the following technical solution:

[0007] A prestressed steel strand performance testing device includes a chassis. A flip plate is mounted on the chassis via a tilting structure. Fixing strips are connected to the four corners of the flip plate. Two longitudinal plates are connected to the tops of the fixing strips on the left and right sides, respectively. A switching plate is mounted on the two longitudinal plates via a switching structure. Three first horizontal grooves are formed on the left side of the switching plate, and three second horizontal grooves are formed on the right side. A second movable plate is slidably mounted in the first horizontal groove. A tensile testing structure is provided between the second movable plate and the left longitudinal plate. A first movable plate is slidably mounted in the second horizontal groove. A first U-shaped plate is mounted at the top of the first movable plate, and a second U-shaped plate is mounted at the top of the second movable plate. Discs are fixedly mounted at both ends of the inner wall of the first U-shaped plate, and discs are rotatably mounted at both ends of the inner wall of the second U-shaped plate. A first clamping structure is provided between each pair of discs.

[0008] The switching structure includes a transmission plate disposed below the switching plate. Three straight grooves are formed below the transmission plate, and two "V"-shaped switching grooves are formed below the transmission plate. The two switching grooves are interconnected, and the switching grooves are connected to the straight grooves. A first fixing block is disposed on the left edge of the upper part of the flip plate. A first electric telescopic rod is installed on the first fixing block. One end of the output shaft of the first electric telescopic rod is connected to a push-pull rod, and one end of the push-pull rod is connected to a first moving block. A through-hole rod is fixedly inserted on the first moving block. The top end of the through-hole rod is movably inserted into one of the straight grooves. A through-frame is movably inserted through each of the longitudinal plates. The two ends of the through-frame are respectively connected to the switching plate.

[0009] A protective cover is set on the longitudinal plate on the left side by a flip structure. A second hydraulic cylinder is installed in the middle of the outside of one side of the protective cover. An impact block is installed at one end of the output shaft of the second hydraulic cylinder inserted into the protective cover.

[0010] Preferably, the first clamping structure includes two radial grooves formed on the disc, and a second moving block is slidably disposed in the radial groove. A clamping plate is connected between each group of two second moving blocks. A winding groove is formed in the middle of the outer side of the clamping plate, and a clamping groove is formed in the middle of the inner side of the clamping plate. A first driving groove is formed on both sides of the clamping plate. A second electric telescopic rod is installed on each disc. One end of the output shaft of the second electric telescopic rod is connected to a first end block. A fixed rod is fixedly passed through the first end block. A driving ring is installed on the fixed rod. The driving ring moves through the first driving groove. A movable winding structure is provided between the disc and the flipping plate on the first moving plate.

[0011] Preferably, the movable winding structure includes a first flipping shaft fixedly connected to the center of the disk above the first movable plate. The first flipping shaft rotates through the first U-shaped plate. A first gear is fixedly sleeved on one end of the first flipping shaft. A drive frame is connected to the top of the flipping plate below each first gear. The drive frame is provided with teeth that mesh with the first gear. A through groove is opened on the flipping plate. The through groove communicates with a second transverse groove. A through rod moves through the through groove. Multiple connecting rods are connected to the through rod. One end of each connecting rod is connected to a corresponding first movable plate. A positioning structure is provided between the through rod and the flipping plate.

[0012] Preferably, the positioning structure includes a square rod that is movably inserted into both ends of the through rod. A positioning cylinder is installed at one end of the square rod, and a first spring is sleeved on the square rod. The two ends of the first spring are respectively connected to the positioning cylinder and the through rod. A handle is provided at one end of the positioning cylinder, and a fixing cylinder is provided on the side of the flip plate near the through groove.

[0013] Preferably, the tensile detection structure includes an L-shaped plate that moves through the second movable plate, a second clamping structure between the L-shaped plate and the second movable plate, a second fixing block connected to one side of the upper part of the L-shaped plate, a second spring connected between the second fixing block and the second U-shaped plate, a third fixing block connected to the upper part of the longitudinal plate on the left side, a first hydraulic cylinder mounted on the third fixing block, one end of the output shaft of the first hydraulic cylinder connected to a second end block, and a pull block mounted on the second end block.

[0014] Preferably, the flipping structure includes a U-shaped strip disposed on the left longitudinal plate, the top end of the U-shaped strip rotatably passing through a second flipping shaft, two flipping strips fixedly sleeved at both ends of the second flipping shaft, the top ends of the flipping strips being connected to a protective cover, and a driving structure being disposed between the second flipping shaft and the push-pull rod.

[0015] Preferably, the driving structure includes a lifting frame that moves through the left longitudinal plate, a pressure plate connected to the lower side of one side of the lifting frame, one end face of the pressure plate being inclined, a fixed frame fixedly passing through the middle of the push-pull rod, a fixed shaft fixedly passing through the top of the fixed frame, a compression cylinder rotatably sleeved on the fixed shaft, a second gear fixedly sleeved in the middle of the second flip shaft, a pulling plate connected to the lifting frame, and teeth on the pulling plate meshing with the second gear.

[0016] Preferably, the second clamping structure includes a guide groove formed on the L-shaped plate, two third moving blocks slidably arranged in the guide groove, each of the third moving blocks having a clamping block installed on it, and a driving rod connected to the bottom of each third moving block. A limiting strip is provided on the bottom of the L-shaped plate near the middle. A driving block is connected to the upper side of one side of the second moving plate, and two second driving grooves are formed on the driving block. The bottom ends of the two driving rods are respectively movably inserted into the two second driving grooves.

[0017] Preferably, the tilting structure includes a groove in the middle of the top of the chassis, a third movable plate slidably disposed in the groove, a screw rotatably inserted into the groove, a motor mounted on the upper right side of the chassis, one end of the motor output shaft connected to the screw, the screw passing through a threaded groove in the third movable plate, cranks rotatably connected to both sides of the third movable plate, one end of the cranks rotatably connected to the tilting plate, one end of the tilting plate movably passing through the third tilting rod, and a U-shaped seat fixedly sleeved on the third tilting rod, the U-shaped seat being fixedly mounted on the chassis.

[0018] In summary, the present invention has the following beneficial technical effects:

[0019] 1. This invention, by setting up a flipping and tilting structure, a pulling detection structure, a switching structure, and a first clamping structure, allows the three steel strands to be clamped directly before testing. During the testing process of the steel strands in different states by the pulling detection structure and the flipping and tilting structure, the switching structure can automatically switch the steel strand to be tested to the testing position for testing. This operation is more labor-saving and convenient, and improves the efficiency of the testing work.

[0020] 2. By setting up a movable winding structure and a positioning structure, the present invention can improve the clamping firmness by winding the steel strand after clamping and fixing one end of the steel strand, and then positioning it by the positioning structure after winding.

[0021] 3. The present invention uses a second clamping structure to automatically clamp the other end of the steel strand during the tensile testing process, thereby improving the clamping firmness of the steel strand and reducing the problem of the steel strand falling off during the testing process.

[0022] 4. By setting up a flipping structure and a driving structure, the present invention can automatically move the protective cover to the corresponding steel strand for protection while the pull detection structure detects the pull of the steel strand, thus avoiding safety accidents caused by the steel strand breaking during pull. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the structure of a prestressed steel strand performance testing device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the flip plate in an embodiment of the present invention;

[0025] Figure 3 This is an embodiment of the present invention. Figure 2 Enlarged view of the structure at point A;

[0026] Figure 4 This is an embodiment of the present invention. Figure 2 Enlarged view of the structure at point B;

[0027] Figure 5 This is a schematic diagram of the structure at the second movable plate in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the second moving plate located on one side of the driving block in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure below the switching plate in an embodiment of the present invention;

[0030] Figure 8 This is an embodiment of the present invention. Figure 7 Enlarged view of the structure at point C;

[0031] Figure 9 This is an embodiment of the present invention. Figure 7 Enlarged view of the structure at point D;

[0032] Figure 10 This is a structural schematic diagram of one of the longitudinal plates in an embodiment of the present invention;

[0033] Figure 11 This is an embodiment of the present invention. Figure 10 Enlarged view of the structure at point E.

[0034] Explanation of reference numerals in the attached drawings: 1. Chassis; 2. Flip plate; 3. Switching plate; 4. First moving plate; 5. First transverse groove; 6. Second moving plate; 7. First U-shaped plate; 8. Second U-shaped plate; 9. Disc; 10. First fixing block; 11. First electric telescopic rod; 12. Transmission plate; 13. Straight groove; 14. Switching groove; 15. First moving block; 16. Insert rod; 17. Push-pull rod; 18. Fixing strip; 19. Second electric telescopic rod; 20. First end block; 21. Fixing rod; 22. Drive ring; 23. Radial groove; 24. Second moving block; 25. Clamping plate; 26. First drive groove; 27. Winding groove; 28. Clamping groove; 29. ​​First flipping shaft; 30. First gear; 31. Drive frame; 32. Second transverse groove; 33. Through rod; 34. Through groove; 35. Connecting rod; 36. Positioning cylinder; 37. Handle 38. Hand; 39. First spring; 40. Fixed cylinder; 41. L-shaped plate; 42. Second fixed block; 43. Second spring; 44. Third fixed block; 45. First hydraulic cylinder; 46. Second end block; 47. Pull block; 48. Longitudinal plate; 49. Through frame; 50. U-shaped strip; 51. Protective cover; 52. Second hydraulic cylinder; 53. Impact block; 54. Second flipping shaft; 55. Flipping strip; 56. Lifting frame; 57. Second gear; 58. Pressure plate; 59. Fixed frame; 60. Fixed shaft; 61. Extrusion cylinder; 62. Driving block; 63. Second driving groove; 64. Driving rod; 65. Third moving block; 66. Guide groove; 67. Clamping block; 68. Limiting strip; 69. Motor; 70. Groove; 71. Third moving plate; 72. Curved rod; 73. Third flipping rod; 74. U-shaped seat; 75. Pulling plate. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-11 The present invention will be described in further detail below.

[0036] This invention discloses a device for testing the performance of prestressed steel strands. (Refer to...) Figures 1-11 A prestressed steel strand performance testing device includes a chassis 1. A flip plate 2 is installed on the chassis 1 via a flipping and tilting structure. Fixing strips 18 are connected to the four corners of the flip plate 2. The tops of the fixing strips 18 on the left and right sides are respectively connected to two longitudinal plates 47. A switching plate 3 is installed on the two longitudinal plates 47 via a switching structure. Three first transverse grooves 5 are opened on the left side of the switching plate 3, and three second transverse grooves 32 are opened on the right side of the switching plate 3. A second moving plate 6 is slidably installed in the first transverse groove 5. A tension detection structure is set between the second moving plate 6 and the left longitudinal plate 47. A first moving plate 4 is slidably installed in the second transverse groove 32. A first U-shaped plate 7 is set at the top of the first moving plate 4, and a second U-shaped plate 8 is set at the top of the second moving plate 6. A disc 9 is fixed at both ends of the inner wall of the first U-shaped plate 7, and a disc 9 is rotatably installed at both ends of the inner wall of the second U-shaped plate 8. A first clamping structure is set between each pair of discs 9.

[0037] The switching structure includes a transmission plate 12 located below the switching plate 3. Three straight grooves 13 are opened below the transmission plate 12. Two "V"-shaped switching grooves 14 are opened below the transmission plate 12. The two switching grooves 14 are interconnected and are connected to the straight grooves 13. A first fixing block 10 is set on the left edge of the flip plate 2. A first electric telescopic rod 11 is installed on the first fixing block 10. One end of the output shaft of the first electric telescopic rod 11 is connected to a push-pull rod 17. One end of the push-pull rod 17 is connected to a first moving block 15. A through rod 16 is fixed on the first moving block 15. The top end of the through rod 16 is movably inserted into one of the straight grooves 13. A through frame 48 is movably passed through each longitudinal plate 47. The two ends of the through frame 48 are respectively connected to the switching plate 3.

[0038] A protective cover 50 is set on the left longitudinal plate 47 by a flip structure. A second hydraulic cylinder 51 is installed in the middle of the outside of one side of the protective cover 50. The output shaft of the second hydraulic cylinder 51 is inserted into the protective cover 50 and an impact block 52 is installed at one end.

[0039] The first clamping structure includes two radial grooves 23 on the disc 9. A second moving block 24 is slidably arranged in the radial grooves 23. A clamping plate 25 is connected between each pair of second moving blocks 24. A winding groove 27 is opened in the middle of the outer side of the clamping plate 25. A clamping groove 28 is opened in the middle of the inner side of the clamping plate 25. A first driving groove 26 is opened on both sides of the clamping plate 25. A second electric telescopic rod 19 is installed on each disc 9. One end of the output shaft of the second electric telescopic rod 19 is connected to a first end block 20. A fixed rod 21 is fixedly passed through the first end block 20. A driving ring 22 is installed on the fixed rod 21. The driving ring 22 moves through the first driving groove 26. A moving winding structure is provided between the disc 9 on the first moving plate 4 and the flipping plate 2.

[0040] The movable winding structure includes a first flipping shaft 29 fixedly connected to the center of the disk 9 above the first movable plate 4. The first flipping shaft 29 rotates through the first U-shaped plate 7. A first gear 30 is fixedly sleeved at one end of the first flipping shaft 29. A drive frame 31 is connected to each first gear 30 below the flipping plate 2. The drive frame 31 is provided with teeth that mesh with the first gear 30. A through groove 34 is opened on the flipping plate 2. The through groove 34 communicates with the second transverse groove 32. A through rod 33 moves through the through groove 34. Multiple connecting rods 35 are connected to the through rod 33. One end of each connecting rod 35 is connected to the corresponding first movable plate 4. A positioning structure is provided between the through rod 33 and the flipping plate 2.

[0041] The positioning structure includes a square rod that is movably inserted into both ends of the through rod 33. A positioning cylinder 36 is installed at one end of the square rod. A first spring 38 is sleeved on the square rod. The two ends of the first spring 38 are respectively connected to the positioning cylinder 36 and the through rod 33. A handle 37 is provided at one end of the positioning cylinder 36. A fixing cylinder 39 is provided at one end of the side of the flip plate 2 near the through groove 34.

[0042] The tensile testing structure includes an L-shaped plate 40 that moves through the second movable plate 6, a second clamping structure between the L-shaped plate 40 and the second movable plate 6, a second fixing block 41 connected to one side of the upper part of the L-shaped plate 40, a second spring 42 connected between the second fixing block 41 and the second U-shaped plate 8, a third fixing block 43 connected to the upper part of the left longitudinal plate 47, a first hydraulic cylinder 44 mounted on the third fixing block 43, one end of the output shaft of the first hydraulic cylinder 44 connected to a second end block 45, and a pull block 46 mounted on the second end block 45;

[0043] The tilting structure includes a groove 69 in the middle of the top of the chassis 1. A third movable plate 70 is slidably disposed in the groove 69. A screw is rotatably inserted into the groove 69. A motor 68 is installed on the upper right side of the chassis 1. One end of the output shaft of the motor 68 is connected to the screw. The screw passes through a threaded groove on the third movable plate 70. Both sides of the third movable plate 70 are rotatably connected to crank rods 71. One end of the crank rod 71 is rotatably connected to a tilting plate 2. One end of the tilting plate 2 moves through a third tilting rod 72. A U-shaped seat 73 is fixedly sleeved on the third tilting rod 72. The U-shaped seat 73 is fixedly installed on the chassis 1. First, the two sets of clamping plates 25 in the first U-shaped plate 7 and the second U-shaped plate 8 at both ends of the three steel strands are respectively connected. The second electric telescopic rod 19 in the start disc 9 drives the first end... As block 20 moves, the first end block 20 drives the driving ring 22 on the fixed rod 21 to slide in the first driving groove 26 of the clamping plate 25. The driving ring 22, by pressing against the groove wall of the first driving groove 26, pushes the two first clamping plates 25 to move synchronously towards the center on the disc 9, clamping the end of the steel strand in the clamping groove 28. Next, the handle 37 pulls the positioning cylinder 36, causing the square rod to move on the through rod 33. The handle 37 also drives the through rod 33 to move in the through groove 34. The connecting rod 35 pulls the first moving plate 4 to move in the second transverse groove 32. The first moving plate 4 drives the first gear 30 to roll on the driving frame 31, automatically rotating the first flipping shaft 29 and the corresponding clamping plate 25 as a whole, winding part of the steel strand onto the clamping plate 25. In groove 27, the clamping firmness of the steel strand is improved, and the positioning cylinder 36 is fitted onto the fixing cylinder 39 to position the first moving plate 4. After both ends of the steel strand are clamped and fixed, the first hydraulic cylinder 44 on the third fixing block 43 is activated to drive the pull block 46 to move. The pull block 46 pulls the corresponding L-shaped plate 40 to move on the second moving plate 6. The L-shaped plate 40 drives the driving rod 63 under the third moving block 64 to slide in the second driving groove 62, thereby driving the two clamping blocks 66 to move towards the middle, clamping the steel strand, and performing a secondary clamping operation on one end of the steel strand, thereby increasing the clamping force of the steel strand. Then the pull block 46 continues to pull the L-shaped plate 40 to move, and the upper limit bar 67 of the L-shaped plate 40 moves and sticks to the second moving plate 6. As the pull block 46 continues to move... The movement of the second moving plate 6 within the first transverse groove 5 directly pulls the steel strand until it breaks. A tension sensor on the second moving plate 6 detects the tensile strength of the steel strand in a horizontal state. After detection, the first electric telescopic rod 11 on the first fixed block 10 is activated. The first electric telescopic rod 11 drives the top end of the insertion rod 16 on the first moving block 15, one end of the push-pull rod 17, to slide towards the switching groove 14 in one of the straight grooves 13. When one end of the insertion rod 16 slides in the switching groove 14, the pressure exerted by the insertion rod 16 on the groove wall of the switching groove 14 pushes the switching plate 3 and the through frame 48 to move together on the longitudinal plate 47. Then, the first electric telescopic rod 11 drives one end of the insertion rod 16 to move towards the side closer to the first fixed block 10 within the switching groove 14.The insertion rod 16 moves to press the inner inclined surface of the switching groove 14, allowing one end of the insertion rod 16 to slide smoothly into the adjacent straight groove 13. During this process, as one end of the insertion rod 16 continues to press against the groove wall of the switching groove 14, it pushes the switching plate 3 to continue moving, thereby automatically switching the next clamped steel strand to the detection position. The second hydraulic cylinder 51 of the protective cover 50 is activated. The second hydraulic cylinder 51 drives the impact block 52 to continuously impact the steel strand in the taut state until the steel strand breaks. The pressure sensor on the impact block 52 is used to monitor the force on the steel strand in different directions. The system can perform testing. After testing, the first electric telescopic rod 11 is activated to move the insertion rod 16, switching the next steel strand to the testing position. Simultaneously, the motor 68 is activated to move the screw. Using the movement of the third moving plate 70 on the screw, the rotating plate 2 is rotated on the U-shaped seat 73 via the curved rod 71, causing the steel strand to be in an inclined state. Then, the impact block 52 impacts the steel strand. By testing the steel strand's performance while it is in an inclined state, this operation is more labor-saving, convenient, and accurate, while also improving testing efficiency.

[0044] See Figures 4-11 The flipping structure includes a U-shaped strip 49 set on the left longitudinal plate 47. The top end of the U-shaped strip 49 rotates through the second flipping shaft 53. Two flipping strips 54 are fixedly sleeved on both ends of the second flipping shaft 53. The top ends of the flipping strips 54 are connected to the protective cover 50. A driving structure is set between the second flipping shaft 53 and the push-pull rod 17.

[0045] The driving structure includes a lifting frame 55 that moves through the left longitudinal plate 47. A pressure plate 57 is connected to the lower side of one side of the lifting frame 55. One end face of the pressure plate 57 is inclined. A fixed frame 58 is fixedly passed through the middle of the push-pull rod 17. A fixed shaft 59 is fixedly passed through the top of the fixed frame 58. A compression cylinder 60 is rotatably sleeved on the fixed shaft 59. A second gear 56 is fixedly sleeved in the middle of the second flip shaft 53. A pulling plate 74 is connected to the lifting frame 55. Teeth that mesh with the second gear 56 are provided on the pulling plate 74. A third spring is connected between the pressure plate 57 and the longitudinal plate 47.

[0046] The second clamping structure includes a guide groove 65 on the L-shaped plate 40, two third moving blocks 64 slidably disposed in the guide groove 65, each third moving block 64 having a clamping block 66 mounted on it, and a driving rod 63 connected to the bottom of each third moving block 64. A limiting strip 67 is disposed near the middle of the bottom of the L-shaped plate 40. A driving block 61 is connected to the upper side of one side of the second moving plate 6, and two second driving grooves 62 are formed on the driving block 61. The bottom ends of the two driving rods 63 are respectively movably inserted into the two second driving grooves 62. When the push-pull rod 17 drives one end of the insertion rod 16 to move in the straight groove 13 toward the direction closer to the first fixed block 10, the push-pull rod 17 drives the fixed block 10. The pressing cylinder 60 on frame 58 moves to press the inclined surface of the pressure plate 57, pushing the pressure plate 57 to drive the lifting frame 55 to move up and down on the longitudinal plate 47. Through the pulling plate 74 and the second gear 56, the second flip shaft 53 is driven to rotate, thereby driving the protective cover 50 to rotate down and cover the outside of the steel strand to be tested, which plays a safety protection role and avoids safety problems caused by the breakage of the steel strand during testing, thus improving the safety of the testing work. When the pressing cylinder 60 moves out of the pressure plate 57, the elastic force of the third spring drives the lifting frame 55 to move up and reset, thereby automatically rotating the protective cover 50 on the longitudinal plate 47, so as to prevent the protective cover 50 from hindering the switching work of the steel strand.

[0047] The implementation principle of a prestressed steel strand performance testing device according to an embodiment of the present invention is as follows: First, the two sets of clamping plates 25 in the first U-shaped plate 7 and the second U-shaped plate 8 at both ends of the three steel strands are respectively moved. The second electric telescopic rod 19 in the disc 9 is activated to drive the first end block 20 to move. The first end block 20 drives the driving ring 22 on the fixed rod 21 to slide in the first driving groove 26 of the clamping plate 25. By using the compression of the groove wall of the first driving groove 26 by the driving ring 22, the two first clamping plates 25 are pushed to move synchronously towards the middle on the disc 9, clamping the ends of the steel strands in the clamping groove 28. Then, the handle 37 is used to pull the positioning cylinder 36 to drive the square rod to move on the through rod 33, and the handle 37 is used to drive the through rod 33 to move in the through groove 34. The first moving plate 4 is moved in the second transverse groove 32 by the connecting rod 35. The first moving plate 4 drives the first gear 30 to roll on the drive frame 31, which automatically drives the first flip shaft 29 and the corresponding clamping plate 25 to rotate as a whole. Part of the steel strand is wound into the winding groove 27 on the clamping plate 25 to improve the clamping firmness of the steel strand. The positioning cylinder 36 is put on the fixing cylinder 39 to position the first moving plate 4. After both ends of the steel strand are clamped and fixed, the first hydraulic cylinder 44 on the third fixing block 43 is activated to drive the pulling block 46 to move. The pulling block 46 pulls the corresponding L-shaped plate 40 to move on the second moving plate 6. The L-shaped plate 40 drives the drive rod 63 under the third moving block 64 to slide in the second drive groove 62, thereby driving the two clamping plates. Block 66 moves towards the center, clamping the steel strand and performing a secondary clamping operation on one end of the steel strand, thereby increasing the clamping force on the steel strand. Then, pull block 46 continues to pull the L-shaped plate 40 to move. The upper limit bar 67 of the L-shaped plate 40 moves and adheres to the second moving plate 6. As pull block 46 continues to move, it pulls the second moving plate 6 to move in the first transverse groove 5, thus directly pulling the steel strand until it breaks. The tensile strength of the steel strand in the horizontal state is detected by the tension sensor on the second moving plate 6. After detection, the first electric telescopic rod 11 on the first fixed block 10 is activated. The first electric telescopic rod 11 drives the top of the insertion rod 16 on the first moving block 15 at one end of the push-pull rod 17 to slide towards the switching groove 14 in one of the straight grooves 13. When one end of the insertion rod 16 slides in the switching groove 14, the pressure exerted by the insertion rod 16 on the wall of the switching groove 14 pushes the switching plate 3 and the through frame 48 to move together on the longitudinal plate 47. Then, the first electric telescopic rod 11 drives one end of the insertion rod 16 to move towards the side closer to the first fixed block 10 in the switching groove 14, causing the insertion rod 16 to move and press against the inner inclined surface of one side of the switching groove 14, so that one end of the insertion rod 16 can smoothly slide into the adjacent straight groove 13. During this process, as one end of the insertion rod 16 continues to press against the wall of the switching groove 14, it pushes the switching plate 3 to continue moving, thereby automatically switching the next clamped steel strand to the detection position, and continuing to activate the first electric telescopic rod 11 to drive one end of the insertion rod 16 to slide in the straight groove 13.The pressing cylinder 60 on the fixed frame 58 of the push-pull rod 17 moves to press the inclined surface of the pressure plate 57, pushing the pressure plate 57 to move the lifting frame 55 up and down on the longitudinal plate 47. Through the pulling plate 74 and the second gear 56, the second flip shaft 53 is rotated, thereby driving the protective cover 50 to rotate and cover the outside of the steel strand to be tested, which plays a safety protection role and avoids safety problems caused by the steel strand breaking during testing, thus improving the safety of the testing work. Then, the second hydraulic cylinder 51 of the protective cover 50 is activated. The second hydraulic cylinder 51 drives the impact block 52 to continuously impact the steel strand in the straightened state until the steel strand breaks. The pressure sensor on the impact block 52 is used to detect the breakage. The device tests the stress performance of the steel strand in different directions. After testing, the first electric telescopic rod 11 is activated to move the insertion rod 16, and the protective cover 50 rotates and resets, thus smoothly switching to the next steel strand for testing. The motor 68 is then activated to move the screw. Using the movement of the third moving plate 70 on the screw, the rotating plate 2 on the U-shaped seat 73 is rotated via the curved rod 71, causing the steel strand to be in an inclined state. Then, the impact block 52 impacts the steel strand, and the performance of the steel strand is tested while it is in an inclined state. This operation is more labor-saving and convenient, with higher testing accuracy and improved testing efficiency.

[0048] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A prestressed steel strand performance testing device, comprising a chassis (1), characterized in that: The chassis (1) is equipped with a flip plate (2) via a flip tilting structure. Each of the four corners of the flip plate (2) is connected to a fixing strip (18). The tops of the fixing strips (18) on the left and right sides are respectively connected to two longitudinal plates (47). A switching plate (3) is provided on the two longitudinal plates (47) via a switching structure. Three first horizontal slots (5) are opened on the left side of the switching plate (3), and three second horizontal slots (32) are opened on the right side of the switching plate (3). A second moving plate is slidably arranged in the first horizontal slots (5). (6) A tension detection structure is provided between the second movable plate (6) and the left longitudinal plate (47). The first movable plate (4) is slidably arranged in the second transverse groove (32). The top of the first movable plate (4) is provided with a first U-shaped plate (7). The top of the second movable plate (6) is provided with a second U-shaped plate (8). Both ends of the inner wall of the first U-shaped plate (7) are fixedly provided with discs (9). Both ends of the inner wall of the second U-shaped plate (8) are rotatably provided with discs (9). A first clamping structure is provided between each pair of discs (9). The switching structure includes a transmission plate (12) set below the switching plate (3), three straight grooves (13) are opened below the transmission plate (12), and two "V" shaped switching grooves (14) are opened below the transmission plate (12). The two switching grooves (14) are connected to each other, and the switching grooves (14) are connected to the straight grooves (13). A first fixing block (10) is set on the left side edge of the flip plate (2). A first electric telescopic rod (11) is installed on the first fixing block (10). One end of the output shaft of the first electric telescopic rod (11) is connected to a push-pull rod (17). One end of the push-pull rod (17) is connected to a first moving block (15). A through rod (16) is fixed on the first moving block (15). The top end of the through rod (16) is movably inserted into one of the straight grooves (13). A through frame (48) is movably passed through each of the longitudinal plates (47). The two ends of the through frame (48) are respectively connected to the switching plate (3). A protective cover (50) is provided on the longitudinal plate (47) on the left side by a flip structure. A second hydraulic cylinder (51) is installed in the middle of the outside of one side of the protective cover (50). An impact block (52) is installed at one end of the output shaft of the second hydraulic cylinder (51) inserted into the protective cover (50).

2. The prestressed steel strand performance testing equipment according to claim 1, characterized in that: The first clamping structure includes two radial grooves (23) on the disc (9). A second moving block (24) is slidably arranged in the radial groove (23). A clamping plate (25) is connected between each pair of the second moving blocks (24). A winding groove (27) is opened in the middle of the outer side of the clamping plate (25). A clamping groove (28) is opened in the middle of the inner side of the clamping plate (25). A first driving groove (26) is opened on both sides of the clamping plate (25). A second electric telescopic rod (19) is installed on each disc (9). The output shaft of the second electric telescopic rod (19) is connected to a first end block (20). A fixed rod (21) is fixedly passed through the first end block (20). A driving ring (22) is installed on the fixed rod (21). The driving ring (22) moves through the first driving groove (26). A moving winding structure is provided between the disc (9) and the flipping plate (2) on the first moving plate (4).

3. The prestressed steel strand performance testing equipment according to claim 2, characterized in that: The movable winding structure includes a first flipping shaft (29) fixedly connected to the center of the disk (9) above the first movable plate (4). The first flipping shaft (29) rotates through the first U-shaped plate (7). A first gear (30) is fixedly sleeved at one end of the first flipping shaft (29). A drive frame (31) is connected to each first gear (30) on the flipping plate (2). The drive frame (31) is provided with teeth that mesh with the first gear (30). A through groove (34) is opened on the flipping plate (2). The through groove (34) is connected to the second transverse groove (32). A through rod (33) moves through the through groove (34). Multiple connecting rods (35) are connected to the through rod (33). One end of each connecting rod (35) is connected to the corresponding first movable plate (4). A positioning structure is provided between the through rod (33) and the flipping plate (2).

4. The prestressed steel strand performance testing equipment according to claim 3, characterized in that: The positioning structure includes a square rod that can be inserted into both ends of the through rod (33). A positioning cylinder (36) is installed at one end of the square rod. A first spring (38) is sleeved on the square rod. The two ends of the first spring (38) are respectively connected to the positioning cylinder (36) and the through rod (33). A handle (37) is provided at one end of the positioning cylinder (36). A fixing cylinder (39) is provided at one end of the side of the flip plate (2) near the through groove (34).

5. The prestressed steel strand performance testing equipment according to claim 1, characterized in that: The tensile testing structure includes an L-shaped plate (40) that moves through the second movable plate (6). A second clamping structure is provided between the L-shaped plate (40) and the second movable plate (6). A second fixing block (41) is connected to one side of the upper part of the L-shaped plate (40). A second spring (42) is connected between the second fixing block (41) and the second U-shaped plate (8). A third fixing block (43) is connected to the upper part of the longitudinal plate (47) on the left side. A first hydraulic cylinder (44) is installed on the third fixing block (43). One end of the output shaft of the first hydraulic cylinder (44) is connected to a second end block (45). A pull block (46) is installed on the second end block (45).

6. The prestressed steel strand performance testing equipment according to claim 1, characterized in that: The flipping structure includes a U-shaped strip (49) set on the left longitudinal plate (47). The top end of the U-shaped strip (49) rotates through the second flipping shaft (53). Two flipping strips (54) are fixedly sleeved on both ends of the second flipping shaft (53). The top end of the flipping strips (54) is connected to the protective cover (50). A driving structure is set between the second flipping shaft (53) and the push-pull rod (17).

7. The prestressed steel strand performance testing equipment according to claim 6, characterized in that: The driving structure includes a lifting frame (55) that moves through the left longitudinal plate (47). A pressure plate (57) is connected to the lower side of one side of the lifting frame (55). One end face of the pressure plate (57) is inclined. A fixed frame (58) is fixedly passed through the middle of the push-pull rod (17). A fixed shaft (59) is fixedly passed through the top of the fixed frame (58). A compression cylinder (60) is rotatably sleeved on the fixed shaft (59). A second gear (56) is fixedly sleeved in the middle of the second flip shaft (53). A pulling plate (74) is connected to the lifting frame (55). Teeth that mesh with the second gear (56) are provided on the pulling plate (74).

8. The prestressed steel strand performance testing equipment according to claim 5, characterized in that: The second clamping structure includes a guide groove (65) on an L-shaped plate (40), two third moving blocks (64) are slidably arranged in the guide groove (65), each of the third moving blocks (64) is equipped with a clamping block (66), and each of the third moving blocks (64) is connected to a driving rod (63) below. A limiting strip (67) is provided near the middle of the L-shaped plate (40), and a driving block (61) is connected above one side of the second moving plate (6). Two second driving grooves (62) are opened on the driving block (61), and the bottom ends of the two driving rods (63) are respectively movably inserted into the two second driving grooves (62).

9. The prestressed steel strand performance testing equipment according to claim 1, characterized in that: The tilting structure includes a groove (69) in the middle of the top of the chassis (1), a third moving plate (70) is slidably arranged in the groove (69), a screw is rotatably inserted into the groove (69), a motor (68) is installed on the upper right side of the chassis (1), one end of the output shaft of the motor (68) is connected to the screw, the screw passes through the threaded groove on the third moving plate (70), both sides of the third moving plate (70) are rotatably connected to crank rods (71), one end of the crank rod (71) is rotatably connected to the tilting plate (2), one end of the tilting plate (2) moves through the third tilting rod (72), a U-shaped seat (73) is fixedly sleeved on the third tilting rod (72), and the U-shaped seat (73) is fixedly installed on the chassis (1).

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