A detection system for the curvature of NPR anchor cables

Abstract

The present invention relates to the technical field of detection devices, in particular to a detection system for the bending degree of NPR anchor cables. Aiming at the problems that the existing NPR anchor cable bending degree detection device is inconvenient to detect the force under different bending degrees and the blanking is difficult after the detection, the following scheme is proposed. It includes a hollow processing table, a force application mechanism and a detector installed on the top of the processing table, and a PLC controller installed on the outer wall of the processing table and connected to the detector. An opening is provided at the top of the processing table, and a wire winding mechanism is installed inside the processing table; the wire winding mechanism includes a base fixed on the inner wall of the bottom of the processing table, a fixed shaft rotatably connected to the top of the base, and a turntable fixed on the top of the fixed shaft. The present invention can conveniently test the force limit of the anchor cable under different bending degrees, and at the same time, it can conveniently remove the anchor cable from the wire winding column after the detection, and can also effectively avoid the anchor cable falling off the wire winding column during the detection process.

Description

Technical Field

[0001] The present invention relates to the field of detection devices, and particularly to a detection system for the bending degree of NPR anchor cables. Background Art

[0002] Currently, in the protection and monitoring of deep foundation pits, deep mining, and high slopes, anchor cables are very frequently and commonly used. Among them, NPR anchor cables are a type of anchor cable with relatively excellent performance and a wide range of applications at present. In order to ensure that the performance indicators of NPR anchor cables can meet the actual use requirements, it is necessary to detect their various performances during design and production. Among them, the bending resistance performance of NPR anchor cables is an important performance indicator.

[0003] When testing the bending performance of NPR anchor cables, it is necessary to test the limit of the external force that the anchor cable can withstand at different degrees of completion. Therefore, multiple groups of experiments need to be carried out during the test. And how to conveniently and effectively detect different bending degrees is an urgent problem to be solved at present. For this reason, this solution proposes a detection system for the bending degree of NPR anchor cables. Summary of the Invention

[0004] A detection system for the bending degree of NPR anchor cables proposed by the present invention solves the problems that the existing NPR anchor cable bending degree detection device is inconvenient to detect the force under different bending degrees and the difficulty of blanking after detection.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A detection system for the bending degree of NPR anchor cables includes a hollow processing table, a force application mechanism and a detector installed on the top of the processing table, and a PLC controller installed on the outer wall of the processing table and connected to the detector. An opening is provided at the top of the processing table, and a wire winding mechanism is installed inside the processing table;

[0007] The wire winding mechanism includes a base fixed on the inner wall of the bottom of the processing table, a fixed shaft rotatably connected to the top of the base, and a turntable fixed on the top of the fixed shaft. The turntable is located above the top of the processing table. A plurality of wire winding columns with different diameters perpendicular to its top surface are movably connected to the turntable. The bottom of the wire winding column extends below the turntable. The area above the processing table is divided into a test station and a non-test station. A lifting mechanism and a wire retracting mechanism are installed on the base;

[0008] The lifting mechanism includes a screw rod rotatably connected to the top of the base and a lifting plate threadedly sleeved outside the screw rod. A motor one for driving the screw rod to rotate is installed on the base. A limiting rod is fixed on the top of the base. The limiting rod penetrates through the lifting plate and is movably connected to it. When the wire winding column is at the wire winding station, the lifting plate rises to jack up the wire winding column upward;

[0009] The wire withdrawing mechanism includes a plurality of lifting columns movably connected to the turntable, a pushing rod fixed to the top of the lifting columns, and a movable rack movably arranged on the top of the base through a mounting member. The plurality of lifting columns are respectively located on one side of the plurality of winding columns, and one end of the pushing rod abuts against the outer circumference of the winding column. The bottom of the pushing rod extends below the turntable. The movable rack is located at the winding station and is used to jack up the lifting column located at the winding station after winding. A linkage assembly is installed between the lifting plate and the base to drive the rack to move while the lifting plate moves.

[0010] Through the above technical solution, it is convenient to test the force limit of the anchor cable under different bending degrees. At the same time, it is also convenient to remove the anchor cable from the winding column after the detection, and it can effectively avoid the anchor cable falling off the winding column during the detection process.

[0011] As a further improvement of the above solution, the force applying mechanism includes two telescopic members installed on the top of the processing table and two fixed sleeves respectively fixed to the movable ends of the two telescopic members. Three-jaw chucks are installed at one ends of the two fixed sleeves, and the movable ends of the two telescopic members are away from each other.

[0012] Through the above technical solution, the anchor cable can be stretched during the test.

[0013] As a further improvement of the above solution, a first spring is sleeved outside the winding column, and a first spring block located below the turntable is sleeved outside the winding column. The top of the first spring is fixedly connected to the bottom surface of the turntable, and the bottom of the first spring is fixedly connected to the top of the first spring block.

[0014] Through the above technical solution, after the external force on the winding column is lost, the winding column can automatically maintain the pressed state, so that the length of the winding column on the top surface of the turntable is too long.

[0015] As a further improvement of the above solution, the mounting member includes a limiting column fixed to the top of the base and a movable sleeve movably sleeved outside the limiting column. The movable rack is fixed to the outer wall of the movable sleeve.

[0016] Through the above technical solution, the purpose of installing the movable rack is achieved, and at the same time, the movable rack can move along the length direction of the limiting column.

[0017] As a further improvement of the above solution, the linkage assembly includes a support plate fixed to the top of the base, a rotating shaft rotatably connected to the support plate, a ratchet wheel and a linkage gear sleeved outside the rotating shaft, and a toothed plate fixed to the bottom surface of the lifting plate. A plurality of ratchet teeth engaged with the ratchet wheel are installed on one outer wall of the toothed plate and are used to drive the ratchet wheel to rotate when the toothed plate descends. The linkage gear is engaged with the movable rack. A second spring is sleeved outside the lifting column, and a second spring block is sleeved outside the lifting column and located below the turntable. The top of the second spring is fixedly connected to the bottom surface of the turntable, and the bottom of the second spring is fixedly connected to the top surface of the second spring block.

[0018] Through the above technical solution, the downward movement of the toothed plate can be used to drive the upward movement of the movable rack.

[0019] As a further improvement of the above solution, a positioning mechanism is installed on the top of the base to lock the fixed shaft during detection. The positioning mechanism includes a fixing plate fixed to the top of the base, a positioning column movably connected to the fixing plate, a mounting plate fixed to the bottom surface of the lifting plate, and an abutting plate fixed to the mounting plate. The abutting plate is of a right-angled triangle structure, and the hypotenuse of the abutting plate faces the fixing plate. The positioning column penetrates through the fixing plate, and a second spring block is sleeved outside the positioning column. A third spring is also movably arranged outside the positioning column. One end of the third spring is fixedly connected to the outer wall of the fixing plate, and the other end of the spring is fixedly connected to the second spring block. A plurality of positioning holes matching the positioning column are formed on the outer circumference of the fixed shaft, and the end of the positioning column away from the fixed shaft abuts against the inclined surface of the abutting plate.

[0020] Through the above technical solution, the fixed shaft can be locked while lifting the winding column located at the detection station, thereby preventing the turntable from rotating during detection.

[0021] As a further improvement of the above solution, a plurality of receiving grooves are formed on the outer circumference of the winding column along its axial direction, and a buffer hole is formed at the bottom of the winding column. A wire blocking mechanism is installed on the winding column.

[0022] Through the above technical solution, it is possible to prevent the cable wound around the winding column from falling off the winding column during detection.

[0023] As a further improvement of the above solution, the wire blocking mechanism includes a mounting shaft rotatably connected in the receiving groove, a transmission gear sleeved on the mounting shaft, a material blocking column fixed to the outer circumference of the mounting shaft, a movable block movably arranged in the buffer hole, a plurality of transmission racks fixed to the top of the movable block, and a movable column fixed to the bottom of the movable block. The tops of the plurality of transmission racks respectively extend into the plurality of receiving grooves and are engaged with the transmission gear. A fourth spring is fixed to the top of the movable block, and the top of the fourth spring is fixedly connected to the top of the buffer hole.

[0024] Through the above technical solution, the setting of the storage groove serves to store the material blocking column, enabling the material blocking column to be stored therein after contraction, while when the material blocking column is opened, it can effectively prevent the anchor cable from falling off the winding column.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. Through the cooperation between the winding mechanism and the lifting mechanism, the winding column on the test station can be conveniently lifted upwards, facilitating the winding of the anchor cable around the winding column during detection. Then, by means of the force application mechanism, both ends of the anchor cable are stretched to test the tensile resistance of the anchor cable at this bending degree. The setting of multiple winding columns can be used to test the tensile resistance at different bending degrees, and the setting of the first spring can ensure that the other winding columns in non-test stations are in a downward pressure state, preventing them from affecting the winding of the anchor cable around the winding column at the test station.

[0027] 2. Through the setting of the wire retreating mechanism, the anchor cable wound around the winding column can be conveniently removed from the winding column after the test.

[0028] 3. Through the setting of the wire blocking mechanism, multiple material blocking columns can be automatically opened when the winding column is lifted upwards, enabling one end of the material blocking column to extend outside the storage groove, thereby preventing the anchor cable from slipping off the winding column during detection. At the same time, the material blocking column can be automatically retracted into the storage groove during the downward movement of the winding column. Description of the Drawings

[0029] Figure 1 It is a top view of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the winding mechanism of the present invention;

[0031] Figure 3 is Figure 2 an enlarged structural schematic diagram of part A in

[0032] Figure 4 is Figure 2 a cross-sectional view of the winding column in

[0033] Figure 5 is Figure 4 an enlarged view of part B in

[0034] Main Symbol Explanation:

[0035] 1. Processing table; 2. Turntable; 3. Wire winding post; 4. Protective plate; 5. Telescopic member; 6. Fixed sleeve; 7. Chuck; 8. Detector; 9. PLC controller; 10. Material stop post; 11. Pusher rod; 12. Ratchet; 13. Limit post; 14. Movable rack; 15. Movable sleeve; 16. Base; 17. Motor 1; 18. Screw; 19. Fixed plate; 20. Contact plate; 21. Fixed shaft; 22. Positioning post; 23. Mounting plate; 24. Lifting plate; 25. Tooth plate; 26. Lifting post; 27. Linkage gear; 28. Storage groove; 29. Transmission gear; 30. Transmission rack; 31. Movable block; 32. Movable post. Detailed implementation manners

[0036] Next, in combination with the accompanying drawings and specific implementation manners, the present invention will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0037] Embodiment 1:

[0038] Please refer to Figures 1 - 5 , a detection system for the bending degree of NPR anchor cables in this embodiment includes a hollow processing table 1, a force application mechanism and a detector 8 installed on the top of the processing table 1, and a PLC controller 9 installed on the outer wall of the processing table 1 and connected to the detector 8. The force application mechanism includes two telescopic members 5 installed on the top of the processing table 1 and two fixed sleeves 6 respectively fixed to the movable ends of the two telescopic members 5. One end of each of the two fixed sleeves 6 is provided with a three-jaw chuck 7. The movable ends of the two telescopic members 5 are away from each other. The telescopic member 5 is a hydraulic cylinder. A transparent protective plate 4 is provided between the detector 8 and the two telescopic members 5. The setting of the protective plate 4 can prevent the anchor cable from damaging the detector 8 after breaking.

[0039] An opening is provided at the top of the processing table 1. A wire winding mechanism is installed inside the processing table 1. The wire winding mechanism includes a base 16 fixed on the inner wall of the bottom of the processing table 1, a fixed shaft 21 rotatably connected to the top of the base 16, and a turntable 2 fixed on the top of the fixed shaft 21. A second motor is installed at the bottom of the base 16. The output shaft of the second motor is drivingly connected to the fixed shaft 21. The input end of the second motor is electrically connected to the output end of the PLC controller 9. The turntable 2 is located above the top of the processing table 1. A plurality of wire winding columns 3 perpendicular to its top surface with different diameters are movably connected to the turntable 2. The bottom of the wire winding column 3 extends below the turntable 2. The area above the processing table 1 is divided into a test station and a non-test station. A lifting mechanism and a wire withdrawing mechanism are installed on the base 16. A first spring is sleeved outside the wire winding column 3, and a first spring block located below the turntable 2 is sleeved outside the wire winding column 3. The top of the first spring is fixedly connected to the bottom surface of the turntable 2, and the bottom of the first spring is fixedly connected to the top of the first spring block. The setting of the first spring can enable the wire winding column 3 to automatically maintain a downward pressing state when leaving the detection station, avoiding the part of the wire winding column 3 extending above the turntable 2 from being too long. When detecting, the cable anchor is wound around the wire winding column 3. Wire winding columns with different diameters can detect the bearing capacity of the cable anchor under different bending degrees.

[0040] The lifting mechanism includes a screw rod 18 rotatably connected to the top of the base 16 and a lifting plate 24 threadedly sleeved outside the screw rod 18. A first motor 17 for driving the screw rod 18 to rotate is installed on the base 16. One end of the output shaft of the first motor 17 is fixed with a driving gear. A driven gear meshing with the driving gear is sleeved outside the screw rod 18. A limiting rod is fixed on the top of the base 16. The limiting rod penetrates through the lifting plate 24 and is movably connected to it. When the wire winding column 3 is located at the wire winding station, the lifting plate 24 rises to jack up the wire winding column 3 upward.

[0041] The wire retreating mechanism includes a plurality of lifting columns 26 movably connected to the turntable 2, a pushing rod 11 fixed to the top of the lifting column 26, and a movable rack 14 movably arranged on the top of the base 16 through a mounting member. A fixing block is fixed to the top of the movable rack 14. The plurality of lifting columns 26 are respectively located on one side of the plurality of wire winding columns 3, and one end of the pushing rod 11 abuts against the outer periphery of the wire winding column 3. The bottom of the pushing rod 11 extends below the turntable 2. The movable rack 14 is located at the wire winding station and is used to jack up the lifting column 26 located at the wire winding station after the wire winding is completed. A linkage assembly is installed between the lifting plate 24 and the base 16 to drive the rack 14 to move while the lifting plate 24 moves. The mounting member includes a limiting column 13 fixed to the top of the base 16 and a movable sleeve 15 movably sleeved outside the limiting column 13. The movable rack 14 is fixed to the outer wall of the movable sleeve 15. The linkage assembly includes a support plate fixed to the top of the base 16, a rotating shaft rotatably connected to the support plate, a ratchet 12 sleeved outside the rotating shaft, a linkage gear 27, and a toothed plate 25 fixed to the bottom surface of the lifting plate 24. A plurality of ratchet teeth engaged with the ratchet 12 are installed on one outer wall of the toothed plate 25 and are used to drive the ratchet 12 to rotate when the toothed plate 25 descends. The linkage gear 27 is engaged with the movable rack 14. A second spring is sleeved outside the lifting column 26, and a second spring block is sleeved outside the lifting column 26 and is located below the turntable 2. The top of the second spring is fixedly connected to the bottom surface of the turntable 2, and the bottom of the second spring is fixedly connected to the top surface of the second spring block. When the lifting column 26 is located at the detection station, the lifting column 26 is directly above the movable rack 14. When the toothed plate 25 descends, it drives the ratchet 12 to rotate clockwise, so that the linkage gear 27 rotates clockwise, so that the movable rack 14 moves upward. When the fixing block contacts the bottom of the lifting column 26, it will drive the lifting column 26 to move upward synchronously, so that the pushing rod 11 can be used to remove the cable stuck outside the wire winding column 3.

[0042] A positioning mechanism is installed on the top of the base 16 for locking the fixed shaft 21 during detection. The positioning mechanism includes a fixing plate 19 fixed on the top of the base 16, a positioning post 22 movably connected to the fixing plate 19, a mounting plate 23 fixed on the bottom surface of the lifting plate 24, and an abutting plate 20 fixed on the mounting plate 23. The abutting plate 20 is of a right-angled triangle structure, and the hypotenuse of the abutting plate 20 faces the fixing plate 19. The positioning post 22 penetrates through the fixing plate 19, and a second spring clip is sleeved outside the positioning post 22. A third spring is also movably arranged outside the positioning post 22. One end of the third spring is fixedly connected to the outer wall of the fixing plate 19, and the other end of the spring is fixedly connected to the second spring clip. A plurality of positioning holes matching the positioning post 22 are formed on the outer circumference of the fixed shaft 21. One end of the positioning post 22 away from the fixed shaft 21 abuts against the inclined surface of the abutting plate 20. After the abutting plate 20 rises following the lifting plate 24, one end of the positioning post 22 slides along the inclined surface of the abutting plate 20, so that the positioning post 22 moves towards the side close to the fixed shaft 21. After one end of the positioning post 22 is stuck into the positioning hole, the turntable 2 can be prevented from rotating during the test.

[0043] The implementation principle of this embodiment is as follows: During detection, the motor two is started to rotate through the PLC controller. The rotation of the motor two drives the fixed shaft 21 to rotate, so as to rotate the selected winding post to the detection station. Then the motor two stops. Subsequently, the motor one is started. The forward rotation of the motor one drives the screw rod 18 to rotate forward, so that the lifting plate 24 moves upward. After the lifting plate 24 contacts the winding post 3, the winding post will be jacked up, so that the length of the winding post 3 above the top surface of the turntable 2 increases. At the same time, the upward movement of the lifting plate 24 will also drive the mounting plate 23 to rise, so that the abutting plate 20 moves upward synchronously. When the abutting plate 20 moves upward, it can squeeze the positioning post 22 towards the side close to the fixed shaft 21, so that one end of the positioning post 22 is inserted into a positioning hole on the fixed shaft 21, thus locking the fixed shaft 21. At this time, the third spring is in a compressed state. After the winding post 3 rises to the set height, the motor one 17 is stopped. Then the cable to be detected can be wound around the winding post 3. Then the two ends of the cable are respectively inserted into the two fixed sleeves 6, and after being tightened, the two ends of the cable are clamped by the chuck 7. Then the detector 8 and the two telescopic members 5 are opened through the PLC controller 9. The two telescopic members 5 extend to pull the cable, so as to test the stress condition of the cable under this bending degree.

[0044] After the test, the two ends of the anchor cable are loosened, and then the motor 17 is started to reverse, thereby driving the lifting plate 24 to descend. As the lifting plate 24 descends, the toothed plate 25 and the abutment plate 20 descend synchronously, and the ratchet teeth on the toothed plate 25 begin to drive the ratchet 12 to rotate as the toothed plate 25 descends, so that the linkage gear 27 rotates synchronously with it. After the linkage gear 27 rotates, it drives the movable rack 14 to move upward. After the movable rack 14 moves upward and contacts the lifting column 26, it can drive the lifting column 26 to move upward synchronously, so that the push rod 11 moves upward at the same time, so that the anchor cable stuck on the winding column 3 can be removed by using the push rod 11;

[0045] At the same time, after the abutment plate 20 descends, the positioning column 22 is gradually withdrawn to the outside of the positioning hole under the action of the spring 3, so that the fixed shaft 21 is unlocked.

[0046] Embodiment 2:

[0047] Combination Figures 1 - 2 and Figure 4 On the basis of Example 1, the present embodiment is further improved in that: a plurality of receiving grooves 28 arranged along the axial direction thereof are provided on the outer periphery of the winding post 3, and a buffer hole is provided at the bottom of the winding post 3, and a wire blocking mechanism is installed on the winding post 3, the wire blocking mechanism includes a mounting shaft rotatably connected in the receiving groove 28, a transmission gear 29 sleeved on the mounting shaft, a material blocking column 10 fixed on the outer periphery of the mounting shaft, a movable block 31 movably arranged in the buffer hole, a plurality of transmission racks 30 fixed on the top of the movable block 31, and a movable column 32 fixed on the bottom of the movable block 31, the tops of the plurality of transmission racks 30 respectively extend into the plurality of receiving grooves 28 and mesh with the transmission gear 29, a spring four is fixed on the top of the movable block 31, the top of the spring four is fixed to the top of the buffer hole, the outer ring of the movable block 31 coincides with the inner ring of the buffer hole, and the bottom of the movable column 32 extends to below the bottom of the winding post 3.

[0048] The implementation principle of this embodiment is as follows: after the lifting plate 24 rises, it will first contact the movable column 32, and then during the rising process of the lifting plate 24, the movable column 32 will be lifted upward first, so that the movable block 31 in the winding column 3 located directly above the lifting plate 24 moves upward, thereby driving multiple transmission racks 30 to move upward, and the transmission rack 30 then drives the transmission gear 29 to rotate, thereby opening the material blocking column 10 from the storage groove, so that one end of the material blocking column 10 rotates to the outside of the storage groove 28 until the top of the lifting plate 24 abuts against the top of the winding column 3. At this time, the spring four is in a compressed state, and then, as the lifting plate 24 continues to move upward, the material blocking column 10 always remains in an open state and moves up synchronously with the winding column 3;

[0049] After the lifting plate 24 descends and disengages from the bottom of the wire winding column 3, as the lifting plate 24 descends, the movable column 32 moves downward relative to the wire winding column 3 under the action of the fourth spring, thereby driving the plurality of material blocking columns 10 to rotate and retract back into the storage groove 28 again.

[0050] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of protection required by the present invention.

Claims

1. A detection system for the curvature of NPR anchor cables, comprising a hollow processing table, a force application mechanism and a detector installed on the top of the processing table, and a PLC controller installed on the outer wall of the processing table and connected to the detector, characterized in that, An opening is formed at the top of the processing table, and a wire winding mechanism is installed inside the processing table; The wire winding mechanism includes a base fixed on the inner wall of the bottom of the processing table, a fixed shaft rotatably connected to the top of the base, and a turntable fixed on the top of the fixed shaft. The turntable is located above the top of the processing table. A plurality of wire winding columns with different diameters perpendicular to its top surface are movably connected to the turntable. The bottom of the wire winding column extends below the turntable. The upper part of the processing table is divided into a test station and a non-test station. A lifting mechanism and a wire withdrawing mechanism are installed on the base; The lifting mechanism includes a screw rod rotatably connected to the top of the base and a lifting plate threadedly sleeved outside the screw rod. A motor I for driving the screw rod to rotate is installed on the base. A limiting rod is fixed on the top of the base. The limiting rod penetrates through the lifting plate and is movably connected to it. When the wire winding column is at the wire winding station, the lifting plate rises to jack up the wire winding column upward; The wire withdrawing mechanism includes a plurality of lifting columns movably connected to the turntable, a pushing rod fixed on the top of the lifting column, and a movable rack movably arranged on the top of the base through a mounting member. The plurality of lifting columns are respectively located on one side of the plurality of wire winding columns, and one end of the pushing rod abuts against the outer circumference of the wire winding column. The bottom of the pushing rod extends below the turntable. The movable rack is located at the wire winding station and is used to jack up the lifting column located at the wire winding station upward after wire winding. A linkage component is installed between the lifting plate and the base to drive the rack to move while the lifting plate moves.

2. The detection system for the bending degree of NPR anchor cables according to claim 1, characterized in that, The force applying mechanism includes two telescopic members installed on the top of the processing table and two fixed sleeves respectively fixed on the movable ends of the two telescopic members. Three-jaw chucks are installed at one ends of the two fixed sleeves, and the movable ends of the two telescopic members are away from each other.

3. The detection system for the bending degree of NPR anchor cables according to claim 1, wherein, A first spring is sleeved outside the wire winding column, and a first spring block located below the turntable is sleeved outside the wire winding column. The top of the first spring is fixedly connected to the bottom surface of the turntable, and the bottom of the first spring is fixedly connected to the top of the first spring block.

4. The detection system for the bending degree of NPR anchor cables according to claim 1, characterized in that, The mounting member includes a limiting column fixed on the top of the base and a movable sleeve movably sleeved outside the limiting column. The movable rack is fixed on the outer wall of the movable sleeve.

5. A detection system for the bending degree of NPR anchor cables according to claim 1, characterized in that, The linkage component includes a support plate fixed on the top of the base, a rotating shaft rotatably connected to the support plate, a ratchet and a linkage gear sleeved outside the rotating shaft, and a tooth plate fixed on the bottom surface of the lifting plate. A plurality of ratchet teeth engaged with the ratchet are installed on one side outer wall of the tooth plate and are used to drive the ratchet to rotate when the tooth plate descends. The linkage gear is engaged with the movable rack. A second spring is sleeved outside the lifting column, and a second spring block located below the turntable is sleeved outside the lifting column. The top of the second spring is fixedly connected to the bottom surface of the turntable, and the bottom of the second spring is fixedly connected to the top surface of the second spring block.

6. The detection system for the bending degree of NPR anchor cables according to claim 1, wherein A positioning mechanism is installed on the top of the base for locking the fixed shaft during detection. The positioning mechanism includes a fixing plate fixed on the top of the base, a positioning column movably connected to the fixing plate, a mounting plate fixed on the bottom surface of the lifting plate, and an abutting plate fixed on the mounting plate. The abutting plate is of a right-angled triangle structure, and the hypotenuse of the abutting plate faces the fixing plate. The positioning column penetrates through the fixing plate, and a spring block two is sleeved outside the positioning column. A spring three is also movably arranged outside the positioning column. One end of the spring three is fixedly connected to the outer wall of the fixing plate, and the other end of the spring is fixedly connected to the spring block two. A plurality of positioning holes matching the positioning column are provided on the outer circumference of the fixed shaft, and the end of the positioning column away from the fixed shaft abuts against the inclined surface of the abutting plate.

7. The detection system for the bending degree of NPR anchor cables according to claim 1, characterized in that, A plurality of receiving grooves are provided on the outer circumference of the winding column along its axial direction, and a buffer hole is provided at the bottom of the winding column. A wire blocking mechanism is installed on the winding column.

8. The detection system for the bending degree of NPR anchor cables according to claim 7, wherein The wire blocking mechanism includes a mounting shaft rotatably connected in the receiving groove, a transmission gear sleeved on the mounting shaft, a material blocking column fixed on the outer circumference of the mounting shaft, a movable block movably arranged in the buffer hole, a plurality of transmission racks fixed on the top of the movable block, and a movable column fixed on the bottom of the movable block. The tops of the plurality of transmission racks respectively extend into the plurality of receiving grooves and mesh with the transmission gear. A spring four is fixed on the top of the movable block, and the top of the spring four is fixedly connected to the top of the buffer hole.

Images