Intelligent detection device for effective prestress of prestressed tendon and use method thereof

Abstract

This invention provides an intelligent detection device for effective prestress in prestressed tendons and its usage method, belonging to the field of engineering testing and measurement technology. The detection device includes a load-bearing stabilization module and a stabilizing seat placed inside the lower side of the load-bearing stabilization module, as well as a prestress testing module slidably connected to the upper part of the load-bearing stabilization module. This invention can achieve automatic and accurate positioning through the linkage of the load-bearing stabilization module and the guide stabilization module. The centering module ensures stable centering of the prestressed tendons. Combined with the synchronous acquisition of force sensors and displacement sensors and the algorithm analysis of the intelligent detection host, it realizes rapid and high-precision intelligent detection of prestress values. At the same time, the anti-slip rod module provides active safety protection. The modular design of the overall device significantly improves the adaptability, safety and efficiency of on-site testing.

Description

Technical Field

[0001] This invention belongs to the field of engineering testing and measurement technology, specifically relating to an intelligent detection device for effective prestress of prestressed tendons and its usage method. Background Technology

[0002] In the construction and long-term health monitoring of prestressed concrete structures (such as bridges, building beams and slabs, railway sleepers, pipe piles, and slope anchorages), the effective prestress of the prestressing tendons is a core parameter determining the structure's bearing capacity, crack resistance, and long-term deformation performance. Accurately detecting the actual effective prestress of the prestressing tendons within constructed structures is crucial for assessing construction quality, verifying design assumptions, and ensuring structural safety. However, current on-site testing technologies in this field face a series of significant bottlenecks.

[0003] Traditional testing methods primarily rely on the manual hydraulic jack counter-tensioning method. This method requires operators to manually align, install, and fix the jacks to the exposed prestressing tendons in the concrete. The process is cumbersome and highly dependent on experience. Manual alignment is prone to deviations, and these initial deviations directly lead to significant measurement errors. Furthermore, the tension force and tendon elongation during the counter-tensioning process are usually read and recorded manually using separate pressure gauges and displacement gauges. Data synchronization is difficult to guarantee, and real-time analysis and feedback are impossible, resulting in unsatisfactory reliability and efficiency of the measurement results.

[0004] Another type of method is based on resistance strain gauge measurement technology, which requires attaching strain gauges to the prestressing tendons and carrying out complex wire connections and moisture-proofing treatment. The on-site preparation work is extensive, the environmental requirements are high, and most of them are for single use, resulting in high costs. It is not suitable for rapid, large-scale engineering site surveys.

[0005] Even more serious is the safety issue. During the anti-tension test, if the clamping device slips or fails, the stretched prestressed tendons may rebound instantly, forming a "slippery bar" or "collapsing spring," posing a serious safety threat to on-site personnel and equipment. Existing technologies generally lack proactive and rapid emergency protection mechanisms.

[0006] Furthermore, on-site testing conditions are complex and varied, with the end positions (height and planar orientation) of prestressed tendons differing. Existing equipment often lacks flexible and efficient positioning and stable support mechanisms, requiring the erection of temporary supports or extensive manual adjustments, resulting in time-consuming and labor-intensive testing preparation work and low overall operational efficiency.

[0007] Therefore, the field of engineering testing urgently needs an intelligent testing device that can automatically, quickly, and accurately locate prestressed tendons and accurately measure their prestress values ​​in real time. Summary of the Invention

[0008] This invention provides an intelligent detection device for effective prestress in prestressed tendons and its usage method. The invention utilizes a load-bearing stabilization module and a guide stabilization module to automatically, quickly, and accurately position the prestressed tendon, solving the problem of rapid and accurate alignment and fixation between the on-site detection device and the prestressed tendon. The alignment module ensures the prestressed tendon remains stable in the required alignment position for testing, effectively eliminating manual alignment deviations and improving the consistency and accuracy of the testing benchmark. It also solves the problems of inaccurate measurement benchmarks, data asynchrony, and low precision caused by manual operation. Based on the automatic, rapid, and accurate positioning and stable alignment of the prestressed tendon, this invention employs force sensors and displacement sensors for synchronous and real-time acquisition of force-displacement signals. Combined with the intelligent detection host, it can accurately measure the prestress value of the prestressed tendon in real time, effectively avoiding the errors and efficiency bottlenecks caused by asynchronous manual readings and data processing lag in traditional methods.

[0009] In a first aspect, the present invention provides an intelligent detection device for effective prestress of prestressed tendons, comprising:

[0010] The guiding and stabilizing module includes a main positioning pipe for mounting on the exposed prestressing tendons of the box girder under test;

[0011] The load-bearing stabilization module includes a load-bearing base, a support seat located on top of the load-bearing base, and an adjustment mechanism capable of driving the support seat to adjust its position relative to the load-bearing base;

[0012] The prestressed test module includes a sliding base slidably mounted on a support, a test frame mounted on the sliding base, and a connection port at the end of the test frame. After the position of the support is adjusted by the adjustment mechanism so that the connection port is coaxially aligned with the main positioning pipe, the prestressed tendons fitted on the main positioning pipe can be inserted into the test frame through the connection port.

[0013] The test fixture is equipped with:

[0014] The centering module includes centering grippers for fixing the prestressed tendons inserted into the test fixture at the centering position;

[0015] The anti-tension module includes a clamping module for clamping a prestressed tendon fixed at the centering position, and an anti-tension drive mechanism for driving the clamping module to move along the axial direction of the prestressed tendon after the clamping module clamps the prestressed tendon.

[0016] Force sensors and displacement sensors are used to detect the counter-tension force of the counter-tension drive mechanism and the axial movement distance of the clamping module when the clamping module grips the prestressed tendon and moves along the prestressed tendon axially.

[0017] Optionally, the guiding stabilization module further includes:

[0018] The auxiliary positioning pipe is connected to the adjustment ring on the outer wall of the main positioning pipe via a telescopic bracket.

[0019] The adjusting ring can rotate relative to the outer wall of the main positioning pipe, and the telescopic frame is equipped with a reset spring. By stretching or compressing the reset spring, the distance between the auxiliary positioning pipe and the main positioning pipe can be adjusted.

[0020] By rotating and adjusting the swivel and adjusting the length of the reset spring, the auxiliary positioning pipe can be sleeved on the prestressed rib on the side of the main positioning pipe, so that the main positioning pipe and the auxiliary positioning pipe together form a stabilizing mechanism.

[0021] Optionally, the load-bearing stabilizing module is mounted on a stabilizing base;

[0022] The supporting base includes a chassis base, on which an adjustment groove is provided;

[0023] The adjustment mechanism includes a stabilizer and a lifting adjustment unit;

[0024] The stabilizer includes an adjustment box, an adjustment slide at the bottom of the adjustment box, the adjustment slide being slidably disposed within the adjustment groove, a first drive motor being disposed on the side wall of the adjustment groove, the output shaft of the first drive motor being connected to a first lead screw, and the adjustment slide being sleeved on the first lead screw; a lifting groove is provided on the inner side wall of the adjustment box;

[0025] The lifting adjustment unit includes a lifting slide, and the support base is fixedly connected to the lifting slide; the top of the support base is provided with a positioning groove that slides with the sliding base; the lifting slide is slidably disposed in the lifting groove, and a second drive motor is provided on the bottom wall of the lifting groove. The output shaft of the second drive motor is connected to a second lead screw, and the lifting slide is sleeved on the second lead screw.

[0026] The extending directions of the adjusting slide and the positioning slide seat intersect.

[0027] Optionally, the main positioning pipe is equipped with a positioning sensor on the side that is aligned with the connection port. The positioning sensor is used to detect the real-time relative position of the connection port and the main positioning pipe to guide the adjustment mechanism to adjust the position of the support until the connection port is coaxially aligned with the main positioning pipe.

[0028] The outer side of the connection port is provided with a fixed slot. After the positioning sensor detects that the connection port and the main positioning pipe are coaxially aligned, the sliding base can slide along the support base to fix the fixed slot to the main positioning pipe.

[0029] After the fixed slot is fixedly connected to the main positioning pipe, the sliding base is kept fixed relative to the support base, and the support base is kept fixed relative to the bearing base. Moving the bearing base can move the main positioning pipe and the prestressed test module along the axial direction of the prestressed tendon until the prestressed tendon is inserted into the test frame through the connection port.

[0030] Optionally, the test fixture is also provided with a handle on top, which allows the sliding base to slide along the support base.

[0031] Optionally, the alignment module is located inside the test fixture on one side near the connection port, and the alignment module is symmetrically arranged on the inner top wall and inner bottom wall of the test fixture; the alignment module further includes:

[0032] A first hydraulic pump is located on the inner wall of the test frame. The first hydraulic pump is connected to a first telescopic shaft, and the centering gripper is located at the end of the first telescopic shaft. The first hydraulic pump can drive the centering gripper through the first telescopic shaft to fix the prestressed tendon inserted into the test frame in the centering position.

[0033] Optionally, the anti-pull modules are symmetrically arranged on the inner sidewalls of both sides of the test frame; the anti-pull modules further include:

[0034] A counter-pull frame is installed on the inner side wall of the test frame;

[0035] A slide rail is provided on the inner bottom wall of the anti-pull frame, and an anti-pull slide block is slidably arranged on the slide rail. The clamping module is arranged on the anti-pull slide block.

[0036] The anti-pull drive mechanism includes a second hydraulic pump located on the inner wall of the anti-pull frame, the second hydraulic pump being connected to a second telescopic shaft, and the end of the second telescopic shaft being connected to the anti-pull slide.

[0037] The second hydraulic pump can drive the clamping module to move axially along the prestressed tendon via the second telescopic shaft; the force sensor is located on the second hydraulic pump.

[0038] Optionally, the clamping module includes:

[0039] A third hydraulic pump is mounted on the anti-pull slide. The third hydraulic pump is connected to a third telescopic shaft. The end of the third telescopic shaft is connected to a clamping mechanism. The displacement sensor is mounted on the clamping mechanism.

[0040] The third hydraulic pump, via the third telescopic shaft, can drive the clamping mechanism to grip the prestressed tendon.

[0041] Optionally, the test fixture may also include:

[0042] The anti-slip bar module includes a fourth hydraulic pump located on the inner wall of the test frame away from the connection port. The fourth hydraulic pump is connected to a fourth telescopic shaft. The end of the fourth telescopic shaft is provided with a slide bar stop. A pressure sensor is provided on the side of the slide bar stop near the clamping module.

[0043] When the axial movement distance detected by the displacement sensor is greater than a preset threshold, the fourth hydraulic pump drives the slide bar stop to move toward the clamping module and contact the clamping module through the fourth telescopic shaft, so that the clamping module stops moving.

[0044] Secondly, the present invention provides a method for using the aforementioned intelligent detection device for effective prestress of prestressed tendons, comprising:

[0045] The main positioning pipe is fitted onto the exposed prestressing tendons of the box girder to be tested;

[0046] After adjusting the position of the support base by adjusting the mechanism to make the connection port coaxially aligned with the main positioning pipe, the prestressed tendons fitted on the main positioning pipe are inserted into the test frame through the connection port.

[0047] The prestressing tendons inserted into the test frame are fixed in the centering position using the centering module;

[0048] The clamping module holds the prestressed tendon fixed at the center position. After the clamping module holds the prestressed tendon, the reverse pull drive mechanism drives the clamping module to move along the axial direction of the prestressed tendon.

[0049] When the clamping module holds the prestressed tendon and moves along the axial direction of the prestressed tendon, the force sensor and displacement sensor respectively detect the counter-tension value of the counter-tension drive mechanism and the axial movement distance of the clamping module. The prestress value of the prestressed tendon can be calculated based on the counter-tension value of the counter-tension drive mechanism and the axial movement distance of the clamping module.

[0050] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0051] 1. This invention first places the main positioning pipe of the guiding and stabilizing module onto the exposed prestressing tendons of the box girder to be tested; then, the position of the support seat is adjusted by the adjustment mechanism to align the connection port with the main positioning pipe coaxially, so that the prestressing tendon placed on the main positioning pipe is inserted into the test frame through the connection port; this invention can automatically complete the rapid coarse adjustment and precise positioning of the intelligent detection device for effective prestressing tendons in three-dimensional space relative to the exposed prestressing tendons; this invention then uses the centering module to fix the prestressing tendon inserted into the test frame at the centering position; this invention utilizes the centering module to ensure that the prestressing tendon is stable in the centering position required for testing, effectively eliminating manual centering deviation and improving the consistency and accuracy of the test benchmark. In this invention, the prestressing tendon is finally clamped and fixed at the center position by a clamping module. After the clamping module clamps the prestressing tendon, a counter-tensioning drive mechanism drives the clamping module to move along the axial direction of the prestressing tendon. While the clamping module is clamping the prestressing tendon and moving along its axial direction, force sensors and displacement sensors detect the counter-tensioning force of the counter-tensioning drive mechanism and the axial movement distance of the clamping module, respectively. Based on the counter-tensioning force and the axial movement distance of the clamping module, the effective prestressing value of the prestressing tendon can be calculated. This invention uses force sensors and displacement sensors for synchronous real-time acquisition of force-displacement signals. Combined with an intelligent detection host, it can achieve rapid automatic calculation of the prestressing value, effectively avoiding errors caused by asynchronous manual readings and data processing lag in traditional methods.

[0052] 2. This invention also incorporates a built-in active safety protection mechanism, enhancing system reliability. Based on micro-displacement sensor signals, this invention monitors the status in real time, quickly identifying "slip bar" risks and immediately triggering hydraulic braking protection. Through the synergistic action of the anti-slip bar module's slip bar stop and pressure sensor, it effectively intercepts potential rib rebound due to clamping failure, preventing equipment impact and personnel safety accidents caused by this, and ensuring the inherent safety of the testing operation.

[0053] 3. This invention, through modular and adaptive design, greatly improves on-site adaptability and operational efficiency: The guiding and stabilizing module adopts a rotatable and adjustable rotating ring and a telescopic fixing frame structure with a return spring, which can quickly adapt to and firmly anchor to the prestressing tendons to form a stable support structure. The prestressing testing module and the load-bearing stabilizing module adopt a sliding nested modular connection method, with a compact overall design and convenient assembly and disassembly, significantly reducing the difficulty and time of on-site handling, installation and commissioning, and improving the testing efficiency and applicability in various complex engineering environments. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0055] Figure 2This is a right view of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0056] Figure 3 This is an assembly diagram of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0057] Figure 4 This is a schematic diagram of the guiding and stabilizing module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0058] Figure 5 This is a cross-sectional view of the guide and stabilization module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0059] Figure 6 This is a schematic diagram of the load-bearing stability module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0060] Figure 7 This is a front view of the load-bearing stability module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0061] Figure 8 This is a right view of the load-bearing stability module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0062] Figure 9 This is an assembly diagram of the load-bearing stability module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0063] Figure 10 This is a schematic diagram of the prestress testing module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0064] Figure 11 This is a front view of the prestress testing module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0065] Figure 12 This is a schematic diagram showing the opening of the prestress testing module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0066] Figure 13 This is an open top view of the prestress testing module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0067] Figure 14 This is a schematic diagram of the centering and anti-tension module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention;

[0068] Figure 15This is a schematic diagram of the connection between the prestress testing and guiding stability module of the intelligent detection device for effective prestress of prestressed tendons according to an embodiment of the present invention.

[0069] Numbering on the map:

[0070] 1. Stabilizer; 2. Load-bearing stabilization module; 3. Prestress testing module; 4. Guide stabilization module; 5. Test object; 6. Prestressing tendon; 21. Stabilizer body; 22. Load-bearing base; 23. Lifting adjustment unit; 24. Adjustment controller; 211. Adjustment box; 212. Lifting slide; 213. Adjustment slide; 214. First drive motor; 215. First lead screw; 221. Chassis base; 222. Adjustment slide; 231. Support base; 232. Positioning slide base; 233. Lifting slide; 234. Second drive motor; 235. Second lead screw; 31. Test frame; 32. Sliding base; 33. Handle; 34. Connection port; 35. Centering module; 36. Reverse pull module; 37. Clamping module 38. Anti-slip bar module; 39. Intelligent detection host; 341. Fixed slot; 351. First hydraulic pump; 352. First telescopic shaft; 353. Centering gripper; 361. Second hydraulic pump; 362. Force sensor; 363. Second telescopic shaft; 364. Reverse pull slide; 365. Reverse pull frame; 366. Slide rail; 371. Third hydraulic pump; 372. Third telescopic shaft; 373. Clamping mechanism; 374. Displacement sensor; 381. Fourth hydraulic pump; 382. Fourth telescopic shaft; 383. Slide bar stop; 384. Pressure sensor; 41. Main positioning pipe; 42. Positioning sensor; 43. Adjusting ring; 44. Telescopic bracket; 45. Auxiliary positioning pipe; 441. Reset fixing spring. Detailed Implementation

[0071] The present invention will be further described below with reference to the accompanying drawings.

[0072] Example 1

[0073] Combination Figure 1 , Figure 2 and Figure 3 This embodiment provides an intelligent detection device for effective prestress of prestressed tendons, which includes a stabilizing seat 1, a guiding stabilizing module 4, a bearing stabilizing module 2, and a prestress testing module 3; the bearing stabilizing module 2 is installed on the stabilizing seat 1; the guiding stabilizing module 4 includes a main positioning pipe 41 for being sleeved on the exposed prestressed tendons 6 of the box girder to be tested 5.

[0074] Combination Figure 4 and Figure 5In this embodiment, the guiding and stabilizing module 4 further includes an auxiliary positioning pipe 45, which is connected to an adjusting ring 43 on the outer wall of the main positioning pipe 41 via a telescopic bracket 44. The adjusting ring 43 can rotate relative to the outer wall of the main positioning pipe 41. A reset spring 441 is provided inside the telescopic bracket 44. By stretching or compressing the reset spring 441, the distance between the auxiliary positioning pipe 45 and the main positioning pipe 41 can be adjusted. By rotating the adjusting ring 43 and adjusting the length of the reset spring 441, the auxiliary positioning pipe 45 can be sleeved on the prestressed tendon 6 on the side of the main positioning pipe 41, so that the main positioning pipe 41 and the auxiliary positioning pipe 45 together form a stabilizing mechanism. In this embodiment, two auxiliary positioning pipes 45 are provided, and the two auxiliary positioning pipes 45 can work together with the main positioning pipe 41 to form a triangular stabilizing mechanism.

[0075] Combination Figures 6 to 9 The load-bearing stabilization module 2 includes a load-bearing base 22, a support seat 231 disposed on the top of the load-bearing base 22, and an adjustment mechanism capable of driving the support seat 231 to adjust its position relative to the load-bearing base 22; the load-bearing base 22 includes a chassis 221, and an adjustment groove 222 is provided on the chassis 221; the adjustment mechanism includes a stabilizer 21 and a lifting adjustment unit 23.

[0076] Combination Figure 9 The stabilizer 21 includes an adjustment housing 211, with an adjustment slide 213 at the bottom of the adjustment housing 211. The adjustment slide 213 is slidably disposed within the adjustment groove 222. A first drive motor 214 is provided on the side wall of the adjustment groove 222, and the output shaft of the first drive motor 214 is connected to a first lead screw 215. The adjustment slide 213 is sleeved on the first lead screw 215. A lifting groove 212 is provided on the inner side wall of the adjustment housing 211. The lifting adjustment unit 23 includes a lifting slide 233. The support base 231 is fixedly connected to the lifting slide 233; the top of the support base 231 is provided with a positioning slide groove 232 that slides with the sliding base 32; the lifting slide 233 is slidably disposed in the lifting slide groove 212, the bottom wall of the lifting slide groove 212 is provided with a second drive motor 234, the output shaft of the second drive motor 234 is connected to a second lead screw 235, and the lifting slide 233 is sleeved on the second lead screw 235; the extending directions of the adjusting slide groove 222 and the positioning slide groove 232 intersect.

[0077] Combination Figure 10 and Figure 11The prestressed testing module 3 includes a sliding base 32 slidably mounted on a support base 231, a test frame 31 mounted on the sliding base 32, and a connection port 34 at the end of the test frame 31. The test frame 31 also has a handle 33 on its top, which allows the sliding base 32 to slide along the support base 231. After adjusting the position of the support base 231 using an adjustment mechanism to align the connection port 34 coaxially with the main positioning pipe 41, the prestressed tendon 6 fitted onto the main positioning pipe 41 can be inserted into the test frame 31 through the connection port 34.

[0078] Combination Figure 12 and Figure 13 The test frame 31 is equipped with a centering module 35, a pull-back module 36, a force sensor 362, and a displacement sensor 374.

[0079] Combination Figure 12 The centering module 35 includes a centering gripper 353 for fixing the prestressed tendon 6 inserted into the test frame 31 at the centering position; the centering module 35 is located inside the test frame 31 on the side near the connection port 34, and the centering module 35 is symmetrically arranged on the inner top wall and inner bottom wall of the test frame 31; the centering module 35 also includes a first hydraulic pump 351, which is located on the inner wall of the test frame 31, and is connected to a first telescopic shaft 352, with the centering gripper 353 located at the end of the first telescopic shaft 352; the first hydraulic pump 351 can drive the centering gripper 353 through the first telescopic shaft 352 to fix the prestressed tendon 6 inserted into the test frame 31 at the centering position.

[0080] Combination Figures 12 to 14The anti-tension module 36 includes a clamping module 37 for clamping the prestressed tendon 6 fixed at the centering position, and an anti-tension drive mechanism for driving the clamping module 37 to move along the axial direction of the prestressed tendon 6 after clamping the prestressed tendon 6. The force sensor 362 and displacement sensor 374 are used to detect the anti-tension force value of the anti-tension drive mechanism and the axial movement distance of the clamping module 37 when the clamping module 37 clamps the prestressed tendon 6 and moves along the axial direction of the prestressed tendon 6. The axial movement distance of the clamping module 37 corresponds to the elongation of the prestressed tendon 6. As the anti-tension is performed, the elongation of the prestressed tendon 6 will change. By detecting the anti-tension force value of the anti-tension drive mechanism and the axial movement distance of the clamping module 37 in real time, the effective prestress value of the prestressed tendon 6 can be calculated. The anti-pull module 36 is symmetrically arranged on the inner sidewalls of both sides of the test frame 31; the anti-pull module 36 also includes an anti-pull frame 365, which is arranged on the inner sidewall of the test frame 31; a slide rail 366 is provided on the inner bottom wall of the anti-pull frame 365, and an anti-pull slide 364 is slidably arranged on the slide rail 366, and the clamping module 37 is arranged on the anti-pull slide 364; the anti-pull driving mechanism includes a second hydraulic pump 361 arranged on the inner sidewall of the anti-pull frame 365, the second hydraulic pump 361 is connected to a second telescopic shaft 363, and the end of the second telescopic shaft 363 is connected to the anti-pull slide 364; the second hydraulic pump 361 can drive the clamping module 37 to move axially along the prestressed tendon 6 through the second telescopic shaft 363; the force sensor 362 is arranged on the second hydraulic pump 361.

[0081] Combination Figure 14 The clamping module 37 includes a third hydraulic pump 371, which is mounted on the anti-pull slide 364. The third hydraulic pump 371 is connected to a third telescopic shaft 372, and the end of the third telescopic shaft 372 is connected to a clamping mechanism 373. The displacement sensor 374 is mounted on the clamping mechanism 373. The third hydraulic pump 371 can drive the clamping mechanism 373 to clamp the prestressed tendon 6 through the third telescopic shaft 372.

[0082] Combination Figure 12 and Figure 13The test frame 31 is also equipped with an anti-slip bar module 38. The anti-slip bar module 38 includes a fourth hydraulic pump 381 located on the inner wall of the test frame 31 away from the connection port 34. The fourth hydraulic pump 381 is connected to a fourth telescopic shaft 382. The end of the fourth telescopic shaft 382 is provided with a slide bar stop 383. Both the fourth hydraulic pump 381 and the fourth telescopic shaft 382 are provided with multiple slide bars circumferentially distributed relative to the axis of the prestressing tendon 6. A pressure sensor 384 is provided on the side of the slide bar stop 383 near the clamping module 37. When the axial movement distance detected by the displacement sensor 374 is greater than a preset threshold, the fourth hydraulic pump 381 drives the slide bar stop 383 to move toward the clamping module 37 and contact the clamping module 37 through the fourth telescopic shaft 382, ​​so that the clamping module 37 stops moving.

[0083] In addition, combined Figure 5 and Figure 15 The main positioning pipe 41 is equipped with a positioning sensor 42 on the side aligned with the connection port 34. The positioning sensor 42 is used to detect the real-time relative position of the connection port 34 and the main positioning pipe 41 to guide the adjustment mechanism to adjust the position of the support base 231 until the connection port 34 and the main positioning pipe 41 are coaxially aligned. A fixing slot 341 is provided on the outside of the connection port 34. After the positioning sensor 42 detects that the connection port 34 and the main positioning pipe 41 are coaxially aligned, the sliding base 32 slides along the support base 231 to fix the fixing slot 341 to the main positioning pipe 41. After the fixing slot 341 is fixedly connected to the main positioning pipe 41, the sliding base 32 is fixed relative to the support base 231, and the support base 231 is fixed relative to the bearing base 22. Moving the bearing base 22 can move the main positioning pipe 41 and the prestressed test module 3 along the axial direction of the prestressed tendon 6 until the prestressed tendon 6 is inserted into the test frame 31 through the connection port 34.

[0084] Example 2

[0085] This embodiment provides a method for using the intelligent detection device for effective prestress of prestressed tendons according to Embodiment 1. It utilizes the intelligent detection host 39 and the adjustment controller 24 for coordinated control to achieve automated operation. Specifically, it includes the following steps: Step S1: First, the main positioning pipe 41 is fitted onto the exposed prestressed tendons 6 of the box girder to be tested 5; then, two auxiliary positioning pipes 45, under the action of the reset and fixing spring 441, are fitted onto the prestressed tendons 6 on the side of the main positioning pipe 41. The entire guide stabilization module 4 is fixed together with the prestressed tendons 6, forming a stable triangular support structure. The operator slides the prestress testing module 3 along the positioning slide seat 232 onto the bearing stabilization module 2 using the handle 33, and pushes the bearing stabilization module 2 to a position close to the guide stabilization module 4.

[0086] Step S2: After adjusting the position of the support 231 through the adjustment mechanism to align the connection port 34 coaxially with the main positioning pipe 41, the prestressed tendon 6 fitted onto the main positioning pipe 41 is inserted into the test frame 31 through the connection port 34. Specifically, the positioning sensor 42 at the front end of the guide stabilization module 4 transmits the position signal to the adjustment controller 24. The adjustment controller 24 then drives the first drive motor 214 of the stabilizer 21 to rotate the first lead screw 215, causing the adjustment slide 213 to move laterally along the adjustment groove 222. At the same time, it drives the second drive motor 234 of the lifting adjustment unit 23 to rotate the second lead screw 235, causing the adjustment slide 213 to move laterally along the adjustment groove 222. The lifting slide 233 drives the support base 231 and the prestress test module 3 above to perform vertical adjustment, thereby completing the rapid and accurate positioning of the prestress test module 3 and the prestress tendon 6 to be tested; then the bearing stabilizing module 2 is moved forward as a whole, so that the main positioning pipe 41 of the guide stabilizing module 4 is inserted into and fixed in the fixing slot 341 of the connection port 34 at the front end of the test frame 31, and the bearing base 22 is moved so that the main positioning pipe 41 and the prestress test module 3 move along the axial direction of the prestress tendon 6 until the prestress tendon 6 is inserted into the test frame 31 through the connection port 34. Then the stabilizing seat 1 is placed at the bottom of the bearing base 22 to enhance the overall stability.

[0087] Step S3: Then, the prestressed tendon 6 inserted into the test frame 31 is fixed in the centering position by the centering module 35; specifically, the first hydraulic pump 351 drives the first telescopic shaft 352 to move toward the prestressed tendon 6, which drives the centering gripper 353 to move, so as to accurately correct and fix the prestressed tendon 6 on the test center line.

[0088] Step S4: The prestressing tendon 6, which is fixed at the center position, is clamped by the clamping module 37. After the clamping module 37 clamps the prestressing tendon 6, the clamping module 37 is driven to move along the axial direction of the prestressing tendon 6 by the anti-pull drive mechanism. When the clamping module 37 clamps the prestressing tendon 6 and moves along the axial direction of the prestressing tendon 6, the anti-pull force value of the anti-pull drive mechanism and the axial movement distance of the clamping module 37 are detected by the force sensor 362 and the displacement sensor 374, respectively. The prestress value can be calculated based on the anti-pull force value of the anti-pull drive mechanism and the axial movement distance of the clamping module 37.

[0089] Specifically, the second hydraulic pump 361 pushes the anti-tension slide 364 forward along the slide rail 366 via the second telescopic shaft 363, causing the clamping module 37 on it to reach the front end of the prestressing tendon 6. The third hydraulic pump 371 of the clamping module 37 then activates, driving the clamping mechanism 373 to grip the prestressing tendon 6 via the third telescopic shaft 372. Next, the second hydraulic pump 361 reverses its operation, causing the anti-tension slide 364 to move backward, thereby applying a reverse tension force to the prestressing tendon 6 through the clamping mechanism 373. During this process, the force sensor 362, connected in series on the loading path of the second hydraulic pump 361, monitors the reverse tension force value in real time, while the displacement sensor 374 installed on the clamping mechanism 373 monitors the axial movement distance of the clamping mechanism 373 in real time. The intelligent detection host 39 simultaneously collects force and displacement signals and calculates and outputs the effective prestress value of the prestressing tendon 6 in real time using a built-in intelligent algorithm.

[0090] In terms of safety protection, if the displacement sensor 374 detects an abnormally sudden increase in axial movement distance that exceeds a preset threshold, it indicates that the clamping mechanism 373 may be slipping, causing a "slip bar". The intelligent detection host 39 immediately triggers the anti-slip bar module 38. The fourth hydraulic pump 381 quickly drives the fourth telescopic shaft 382 to push the slide bar stop 383 forward. When the pressure sensor 384 at the front end of the slide bar stop 383 detects a pressure signal in contact with the slipping clamping mechanism 373, the system determines that emergency braking and protection have been completed, and the entire workflow can be automated.

[0091] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0092] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart detection device for effective prestress in prestressed tendons, characterized in that, include: The guide stabilization module (4) includes a main positioning pipe (41) for mounting on the exposed prestressed tendons (6) of the box girder to be tested (5). The load-bearing stabilizing module (2) includes a load-bearing base (22), a support seat (231) disposed on the top of the load-bearing base (22), and an adjustment mechanism capable of driving the support seat (231) to adjust its position relative to the load-bearing base; The prestressed test module (3) includes a sliding base (32) slidably mounted on a support base (231), a test frame (31) mounted on the sliding base (32), and a connection port (34) located at the end of the test frame (31). After the position of the support base (231) is adjusted by the adjustment mechanism so that the connection port (34) is coaxially aligned with the main positioning pipe (41), the prestressed tendon (6) fitted on the main positioning pipe (41) can be inserted into the test frame (31) through the connection port (34). The test fixture (31) is internally equipped with: The centering module (35) includes a centering gripper (353) for fixing the prestressed tendon (6) inside the insertion test frame (31) to the centering position. The anti-pull module (36) includes a clamping module (37) for clamping the prestressed tendon (6) fixed in the centering position, and an anti-pull drive mechanism for driving the clamping module (37) to move along the axial direction of the prestressed tendon (6). Force sensor (362) and displacement sensor (374) are used to detect the counter-tension force value of the counter-tension drive mechanism and the axial movement distance of the clamping module (37) when the clamping module (37) clamps the prestressed tendon (6) and moves along the axial direction of the prestressed tendon (6); The guiding stabilization module (4) also includes: The auxiliary positioning pipe (45) is connected to the adjustment ring (43) on the outer wall of the main positioning pipe (41) through the telescopic bracket (44); The adjusting ring (43) can rotate relative to the outer wall of the main positioning pipe (41). The telescopic frame (44) is provided with a reset fixing spring (441). By stretching or compressing the reset fixing spring (441), the distance between the auxiliary positioning pipe (45) and the main positioning pipe (41) can be adjusted. The main positioning pipe (41) is equipped with a positioning sensor (42) on the side that is aligned with the connection port (34). The positioning sensor (42) is used to detect the real-time relative position of the connection port (34) and the main positioning pipe (41) to guide the adjustment mechanism to adjust the position of the support base (231) until the connection port (34) is coaxially aligned with the main positioning pipe (41). The connection port (34) is provided with a fixed slot (341) on the outside. After the positioning sensor (42) detects that the connection port (34) and the main positioning pipe (41) are coaxially aligned, the sliding base (32) slides along the support base (231) so that the fixed slot (341) can be fixedly connected to the main positioning pipe (41). After the fixed slot (341) is fixedly connected to the main positioning pipe (41), the sliding seat (32) is fixed relative to the support seat (231), and the support seat (231) is fixed relative to the bearing base (22). Moving the bearing base (22) can make the main positioning pipe (41) and the prestressed test module (3) move along the axial direction of the prestressed tendon (6) until the prestressed tendon (6) is inserted into the test frame (31) through the connection port (34).

2. The intelligent detection device for effective prestress of prestressed tendons according to claim 1, characterized in that, The load-bearing stabilizing module (2) is installed on the stabilizing base (1); The support base (22) includes a chassis base (221), and an adjustment groove (222) is provided on the chassis base (221). The adjustment mechanism includes a stabilizer (21) and a lifting adjustment unit (23); The stabilizer (21) includes an adjustment box (211), the bottom of which is provided with an adjustment slide (213), which is slidably disposed in the adjustment groove (222). A first drive motor (214) is provided on the side wall of the adjustment groove (222), and the output shaft of the first drive motor (214) is connected to a first lead screw (215). The adjustment slide (213) is sleeved on the first lead screw (215). A lifting groove (212) is provided on the inner side wall of the adjustment box (211). The lifting adjustment unit (23) includes a lifting slide (233), and the support base (231) is fixedly connected to the lifting slide (233). The top of the support base (231) is provided with a positioning slide groove (232) that slides with the sliding base (32). The lifting slide (233) is slidably disposed in the lifting slide groove (212). A second drive motor (234) is provided on the bottom wall of the lifting slide groove (212). The output shaft of the second drive motor (234) is connected to a second lead screw (235). The lifting slide (233) is sleeved on the second lead screw (235). The extending directions of the adjusting slide (222) and the positioning slide seat (232) intersect.

3. The intelligent detection device for effective prestress of prestressed tendons according to claim 1, characterized in that, The test fixture (31) is also provided with a handle (33) on top.

4. The intelligent detection device for effective prestress of prestressed tendons according to claim 1, characterized in that, The alignment module (35) is located inside the test frame (31) on one side near the connection port (34), and the alignment module (35) is symmetrically arranged on the inner top wall and inner bottom wall of the test frame (31); the alignment module (35) further includes: The first hydraulic pump (351) is located on the inner wall of the test frame (31). The first hydraulic pump (351) is connected to the first telescopic shaft (352). The centering gripper (353) is located at the end of the first telescopic shaft (352). The first hydraulic pump (351) can drive the centering gripper (353) through the first telescopic shaft (352) to fix the prestressed tendon (6) inserted into the test frame (31) in the centering position.

5. The intelligent detection device for effective prestress of prestressed tendons according to claim 1, characterized in that, The anti-pull module (36) is symmetrically arranged on the inner sidewalls of both sides of the test frame (31); The reverse pull module (36) also includes: A reverse tension bracket (365) is provided on the inner side wall of the test frame (31); A slide rail (366) is provided on the inner bottom wall of the anti-pull frame (365), and an anti-pull slide block (364) is slidably arranged on the slide rail (366). The clamping module (37) is arranged on the anti-pull slide block (364). The reverse pull drive mechanism includes a second hydraulic pump (361) disposed on the inner side wall of the reverse pull frame (365), the second hydraulic pump (361) is connected to a second telescopic shaft (363), and the end of the second telescopic shaft (363) is connected to the reverse pull slide (364). The second hydraulic pump (361) can drive the clamping module (37) to move axially along the prestressed tendon (6) via the second telescopic shaft (363); the force sensor (362) is located on the second hydraulic pump (361).

6. The intelligent detection device for effective prestress of prestressed tendons according to claim 5, characterized in that, The clamping module (37) includes: The third hydraulic pump (371) is located on the anti-pull slide (364). The third hydraulic pump (371) is connected to the third telescopic shaft (372). The end of the third telescopic shaft (372) is connected to the clamping mechanism (373). The displacement sensor (374) is located on the clamping mechanism (373). The third hydraulic pump (371) can drive the clamping mechanism (373) to hold the prestressed tendon (6) through the third telescopic shaft (372).

7. The intelligent detection device for effective prestress of prestressed tendons according to claim 1, characterized in that, The test fixture (31) also contains: The anti-slip bar module (38) includes a fourth hydraulic pump (381) located on the inner wall of the test frame (31) away from the connection port (34). The fourth hydraulic pump (381) is connected to a fourth telescopic shaft (382). The end of the fourth telescopic shaft (382) is provided with a slide bar stop (383). A pressure sensor (384) is provided on the side of the slide bar stop (383) near the clamping module (37). When the axial movement distance detected by the displacement sensor (374) is greater than the preset threshold, the fourth hydraulic pump (381) drives the slide bar stop (383) to move toward the clamping module (37) and contact the clamping module (37) through the fourth telescopic shaft (382) so that the clamping module (37) stops moving.

8. A method of using the intelligent detection device for effective prestress of prestressed tendons as described in any one of claims 1-7, characterized in that, include: The main positioning pipe (41) is fitted onto the exposed prestressed tendons (6) of the box girder to be tested (5); The position of the support base (231) is adjusted by adjusting the mechanism so that the connection port (34) is coaxially aligned with the main positioning pipe (41), and then the prestressed tendon (6) fitted on the main positioning pipe (41) is inserted into the test frame (31) through the connection port (34); The prestressed tendons (6) inserted into the test frame (31) are fixed in the centering position by the centering module (35); The clamping module (37) holds the prestressed tendon (6) fixed at the center position. After the clamping module (37) holds the prestressed tendon (6), the clamping module (37) is driven to move along the axial direction of the prestressed tendon (6) by the reverse pull drive mechanism. When the clamping module (37) holds the prestressed tendon (6) and moves along the axial direction of the prestressed tendon (6), the force sensor (362) and the displacement sensor (374) respectively detect the counter-pull force value of the counter-pull drive mechanism and the axial movement distance of the clamping module (37). Based on the counter-pull force value of the counter-pull drive mechanism and the axial movement distance of the clamping module (37), the effective prestress value of the prestressed tendon (6) can be calculated.

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