Auxiliary guiding device and method for on-site concrete large-range quality detection

Abstract

The invention discloses an auxiliary guiding device and method for on-site concrete large-scale quality detection, and belongs to the technical field of concrete detection, the auxiliary guiding device comprises two groups of steel wire erecting parts and an auxiliary guiding part capable of moving back and forth between the two groups of steel wire erecting parts; the steel wire erecting part comprises a vertical pipe sleeve detachably installed on a vertically-poured steel bar in reinforced concrete, a steel wire tensioning assembly installed on the vertical pipe sleeve and two steel wire ropes which are tightened above the reinforced concrete in parallel through the steel wire tensioning assembly. The auxiliary guiding part comprises a guiding wheel set capable of moving back and forth on the steel wire rope, a lower straight arm connected to the bottom of the guiding wheel set, a traction rope connected to the side face of the lower straight arm and a mounting flange connected to the bottom end of the lower straight arm. According to the device, through a composite structure of a steel wire frame and a guide wheel set, detection equipment can move in a large range along a preset datum line to cover all concrete areas on the way of a steel wire rope, and meanwhile detection errors are reduced through accurate leveling and positioning.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, specifically to an auxiliary guiding device and method for large-scale on-site concrete quality testing. Background Technology

[0002] In concrete engineering (such as highway bridges and tunnel concrete), quality inspection is a crucial step in ensuring structural safety. Traditional inspection methods often rely on single-point testing equipment (such as rheometers, infrared thermal imagers, and ultrasonic probes), requiring manual placement of each testing point, which has the following drawbacks: Limited detection range: A single device can only cover a local area. Large-scale detection requires frequent relocation of equipment, which is inefficient and prone to missing key areas. Error accumulation: Positional deviations of manually located detection points (such as height and horizontal distance) can lead to large data dispersion, affecting the overall accuracy of the assessment; Poor adaptability: Different equipment needs to be changed for different testing needs (such as rheological testing that penetrates into concrete and infrared testing of surface defects), making the operation cumbersome. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an auxiliary guiding device and method for large-scale on-site concrete quality testing. Through a composite structure of "steel wire rope erection + guide wheel group", the testing equipment can move along a preset baseline over a large area, covering all concrete areas along the steel wire rope, while reducing the testing error through precise leveling and positioning.

[0004] The technical solution of this invention is implemented as follows: An auxiliary guiding device for large-scale on-site concrete quality testing includes two sets of steel wire support sections and an auxiliary guiding section, the specific structure of which is as follows: I. Steel Wire Erection Section The wire rope support section serves as the support benchmark for the device, used to erect two parallel, taut wire ropes above the concrete structure, acting as the moving track for the auxiliary guiding section. Each wire rope support section includes: 1. Vertical pipe sleeve: Made of metal pipe, with at least two top screws arranged in an array on the bottom side. The top of the top screw can press against the side wall of the vertically poured steel reinforcement in the concrete, so as to realize the detachable fixation of the vertical pipe sleeve.

[0005] 2. Wire tensioning assembly: Installed at the top of the vertical pipe sleeve, including a T-shaped bracket, a wire reel, a lead wire helium, a tensioning spool, and a tensioning block. Among them: A T-shaped bracket is fixed to the top of the vertical pipe sleeve, and wire pull plates are symmetrically installed on both sides of the top. The outer wall of the pull reel is provided with a lead wire solenoid. The end of the wire rope passes through the lead wire groove one of the pull reel (the width of which is slightly larger than the diameter of the wire rope), and then through the lead wire groove two of the lead wire solenoid (the width of which is also slightly larger than the diameter of the wire rope). The lead wire groove one and the lead wire groove two are oriented in the same direction. Then it passes through the lead wire groove three of the tensioning sleeve (the width of which is also slightly larger than the diameter of the wire rope), and finally connects to the tensioning block. The tensioning sleeve is screwed onto the lead wire tube by threads, and the tensioning nut is fixed at the end facing the pull reel. After the tensioning sleeve is finally fixed, the lead wire groove three should be oriented in the opposite direction to the lead wire groove one and lead wire groove two to prevent the wire rope from coming off. 3. Wire rope: By rotating the tension nut, the tension sleeve can be pulled to keep the wire rope taut and parallel.

[0006] II. Auxiliary Guidance Section The auxiliary guidance section serves as the carrier for the testing equipment, allowing it to move back and forth along the wire rope for wide-range testing. Its structure includes: 1. Guide wheel assembly: Installed on the top of the lower straight arm, it consists of three sets of horizontally arranged T-shaped brackets and rotatably mounted guide wheels. Among them: The middle section is the main T-shaped frame 2, which is concentrically set with the lower straight arm (to ensure a stable center of gravity during movement). The two sides are auxiliary T-shaped frames, which are symmetrically arranged about the main T-shaped frame (to balance the lateral force during movement and prevent displacement). Each T-shaped frame has guide wheels mounted at both ends (to contact the surface of the wire rope and reduce frictional resistance).

[0007] 2. Lower Straight Arm: Connects the guide wheel assembly to the mounting flange. It has a traction rope hook on its side (moved by pulling with the traction rope), and a sliding adjustable sleeve on top. A second set screw (fixing the sleeve position) passes through the side of the adjustable sleeve, and the traction rope is connected via the hook.

[0008] 3. Installation flange: Fixed to the bottom end of the lower straight arm, with a concrete testing device adapted for installation at the bottom. The testing device is divided into two types: Insertion-type instruments (such as rheometers and rebar detectors): These require insertion into the concrete for testing. Non-penetrating types (such as infrared thermal imagers and ultrasonic detectors): only require contact with the surface for detection.

[0009] An auxiliary guidance method for large-scale on-site concrete quality testing, the specific implementation steps of which are as follows: Step S1: Installation and fixing of the steel wire rope support. Based on the dimensions (e.g., length) of the concrete structure to be inspected, select two vertically cast steel bars and fit two sets of vertical sleeves onto the sidewalls of the steel bars. Rotate the first set of screws at the bottom of the vertical sleeves (at least two, arranged vertically) until one end of the screw firmly contacts the sidewall of the steel bar (control the tightening torque with a torque wrench to avoid excessive compression that could deform the steel bar). Check the verticality of the vertical sleeves (error ≤ 1°) to ensure that the baseline is parallel after the steel wire rope is tensioned.

[0010] Step S2: Tensioning and leveling the wire ropes. Install a pull reel on the T-shaped frame at the top of each set of vertical pipe sleeves. Pass the two wire ropes through the lead groove one of the pull reel respectively; the wire ropes continue to pass through the lead groove two of the lead solenoid (the width is the same as the lead groove one), and their ends are fixedly connected to the tensioning block (the tensioning block has a built-in anti-slip rubber pad to prevent the wire ropes from slipping); rotate the tensioning nut (in conjunction with a ratchet wrench), and pull the wire ropes through the limiting action of the tensioning nut until the two wire ropes are parallel and taut; use a laser rangefinder to check the parallelism and deflection of the two wire ropes. If they do not meet the standards, fine-tune the tensioning nut until the requirements are met.

[0011] Step S3: Assembly and debugging of the auxiliary guide section. Weld three sets of T-shaped frames 2 horizontally side by side to the top of the lower straight arm (the main T-shaped frame 2 is located in the middle, and the auxiliary T-shaped frames 2 are symmetrically distributed on both sides); install guide wheels (bearings are made of stainless steel with chrome plating to reduce the coefficient of friction with the wire rope) at both ends of each set of T-shaped frames 2, ensuring that the guide wheels are in close contact with the wire rope surface; connect the lower straight arm to the mounting flange through the adjusting sleeve (the adjusting sleeve slides with the lower straight arm, and the contact surface is lubricated with grease), and check the sliding flexibility of the sleeve.

[0012] Step S4: Positioning and Adjustment of the Detection Location. Holding the traction rope, pull the lower straight arm along the wire rope to the target detection area (such as a mid-span position); rotate the second set screw (at least one) on the side of the adjusting sleeve to fix the sleeve at the target height of the lower straight arm (for example: if using an insertion type detection device, adjust the sleeve down to 1 / 3 of the way down the lower straight arm so that the detection probe at the bottom of the mounting flange is inserted into the concrete 50-200mm; if using a non-insertion type detection device, adjust the sleeve up to 1 / 3 of the way up the lower straight arm so that the probe contacts the concrete surface); calibrate the level of the mounting flange using a laser level to ensure that the detection device is perpendicular to the concrete surface or detection point.

[0013] Step S5: Concrete Quality Inspection and Data Acquisition. If using an insertable testing device (e.g., a rheometer): Start the equipment, apply static / dynamic shear stress according to the set parameters, and simultaneously acquire rheological parameters such as yield stress and plastic viscosity of the concrete; during movement, pull the lower straight arm at a constant speed using a traction rope to ensure continuous data collection. If using a non-insertive testing device (e.g., an infrared thermal imager): Adjust the distance between the probe and the concrete surface, start the thermal imager to acquire the surface temperature distribution, and identify internal defects (e.g., voids, leaks) through image analysis; maintain a constant speed during movement to avoid image blurring. Simultaneously record parameters such as testing time, ambient temperature, and concrete age, and upload them to the cloud platform via a wireless transmission module (e.g., 4G / Bluetooth) to generate a test report in real time.

[0014] Step S6: Inspection complete. The area above the reinforced concrete through which the wire rope passes constitutes the inspection area. Repeat steps S1-S5 until all inspection points in this inspection area have been inspected.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: 1. Baseline stability: The two sets of steel wires are fixed to the reinforcing bars through vertical pipe sleeves. After the steel wire ropes are tensioned, they form a parallel baseline. The coverage range is determined by the spacing of the reinforcing bars (it can cover a length of 10-50 meters). The detection equipment can complete the continuous detection of all areas along the way by moving along the steel wire rope, avoiding the omissions of traditional single-point detection.

[0016] 2. Precision of movement: The symmetrical design of the guide wheel assembly (main T-shaped frame 2 + auxiliary T-shaped frame 2) ensures the balance of the center of gravity during movement and reduces lateral offset; the adjustable sliding sleeve can adjust the height of the mounting flange to ensure that the distance between the detection device and the concrete surface or internal detection point is consistent, reducing errors caused by position deviation.

[0017] 3. Multi-scenario adaptability: The mounting flange allows for quick switching between insertion and non-insertion detection devices. Combined with the position adjustment of the resistance sliding sleeve (lowering the sleeve for insertion and raising it for non-insertion), it achieves "one device for multiple uses" and improves detection efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of an auxiliary guiding device for large-scale on-site concrete quality testing, showing the installation of an insertion-type testing device (such as a rheometer). Figure 2A three-dimensional structural diagram of an auxiliary guiding device for large-scale on-site concrete quality testing, showing the installation of non-penetrating testing devices (such as infrared thermal imagers); Figure 3 A three-dimensional structural diagram of the steel wire frame section; Figure 4 This is a three-dimensional structural diagram of the wire tensioning assembly; Figure 5 This is a diagram showing the internal structure of the wire tensioning assembly; Figure 6 for Figure 2 A magnified view of a section at point A in the middle; Figure 7 A three-dimensional structural diagram to aid in the guidance section.

[0020] The markings in the diagram are: 1-Vertical sleeve; 2-Setting screw one; 3-T-shaped frame one; 4-Pull reel; 5-Lead threaded tube; 6-Tensioning screw sleeve; 7-Tensioning block; 8-Wire rope; 9-Lead threaded groove one; 10-Lead threaded groove two; 11-Lead threaded groove three; 12-Tensioning nut; 13-Main T-shaped frame two; 14-Auxiliary T-shaped frame two; 15-Guide wheel; 16-Lower straight arm; 17-Adjustable sliding sleeve; 18-Setting screw two; 19-Hanging ring; 20-Mounting flange; 21-Traction rope; 22-Reinforced concrete; 23-Vertical cast-in-place steel reinforcement. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1 to 2 As shown, an auxiliary guiding device for large-scale on-site concrete quality testing is used for auxiliary testing of concrete quality in highway bridges. The device establishes a parallel baseline using two sets of steel wire supports, and the auxiliary guiding part moves along the baseline to achieve large-scale continuous testing. The device consists of three main parts: the steel wire support (supporting baseline), the auxiliary guiding part (moving platform), and the testing device (omitted in the figure).

[0023] I. Steel wire erection section (support benchmark), such as Figures 3 to 6 As shown The wire rope support section acts as the "track" of the device, used to erect two parallel, taut wire ropes 8 above the concrete structure, serving as a reference line for the movement of the auxiliary guiding section. Each set of wire rope support sections includes: 1. Vertical pipe sleeve 1: Made of Q235B steel pipe (outer diameter 80mm, wall thickness 4mm), with a length of 200-300mm. Two to three M10×50mm stainless steel bolts (50mm spacing) are arranged in an array on the bottom side. The top of each M10×50mm stainless steel bolt is fitted with a rubber gasket (5mm thickness, Shore hardness 70HA), which firmly contacts the side wall of the vertically cast steel reinforcement 23 (diameter ≥12mm) within the concrete, enabling the vertical pipe sleeve 1 to be detachably fixed.

[0024] 2. Wire tensioning assembly: Installed at the top of the vertical sleeve 1 (300mm high), including T-shaped bracket 3, wire reel 4, lead wire solenoid 5, tensioning sleeving 6, and tensioning block 7. Specific dimensions are as follows: T-shaped frame 3: It is made of angle steel (L50×50×5mm) welded together. The top horizontal section is 200mm long and the vertical section is welded to the top of the vertical pipe sleeve 1 (weld height 6mm). Pulling plate 4: A 200mm diameter disc (Q235B steel plate) with a 10mm diameter wire hole in the center and four M8 bolt holes evenly distributed around the edge (for fixing the lead wire solenoid 5). Lead wire solenoid 5: M12×100mm screw (galvanized surface), one end is welded to the pull wire disc 4 (weld height 5mm), and a lead wire groove 2 10 is opened on the outer wall (width 6mm, depth 3mm, groove opening rounded corner R1mm). Tensioning sleeve 6: M16×80mm screw (galvanized surface), with an internal thread (2mm pitch) on the inner wall that matches the lead wire solenoid 5, and a lead wire groove 311 (6mm width, 3mm depth) on the outer wall. Tensioning block 7: U-shaped clamp (Q235B steel plate), with a V-shaped groove (60° angle, 5.5mm width) at the bottom for clamping the wire rope 8 (φ4mm in diameter), and welded to the tensioning sleeving 6 at the top.

[0025] The steel wire rope 8 (φ4mm, tensile strength 1860MPa, breaking strength ≥10kN) passes sequentially through the lead wire groove 9 (6mm wide) of the pull reel 4, the lead wire groove 10 (6mm wide) of the lead wire solenoid 5, and the lead wire groove 11 (6mm wide) of the tensioning sleeve 6, and is finally connected to the tensioning block 7. By rotating the tensioning sleeve 6 (with a ratchet wrench), the steel wire rope 8 can be pulled tight. The tension force is limited by the tensioning nut 12 (M16 nut, 10mm thick) to ensure that the two steel wire ropes 8 are parallel and tight. After the tensioning sleeve 6 is finally fixed, the lead wire groove 11 should be oriented in the opposite direction to the lead wire groove 9 and the lead wire groove 10 to prevent the steel wire rope 8 from detaching.

[0026] II. Auxiliary guidance section (mobile platform), such as Figure 7 As shown The auxiliary guidance section serves as the "carrier" of the testing equipment, moving back and forth along the steel wire rope 8 to achieve wide-range testing. Its structure includes: 1. Guide wheel assembly: Installed on the top of the lower straight arm 16, it consists of three sets of horizontally arranged T-shaped brackets and rotatably mounted guide wheels. The specific design is as follows: T-shaped frame 2: Made of aluminum alloy (6061-T6) profile (section 50×50×3mm), length 150mm, with the main T-shaped frame 2 13 in the middle (aligned with the center of the lower straight arm 16), and auxiliary T-shaped frames 2 14 on both sides (100mm apart, symmetrically distributed). Guide wheel 15: It adopts stainless steel deep groove ball bearing (model 608ZZ, inner diameter 8mm, outer diameter 22mm, thickness 7mm), and is fixed to both ends of T-shaped frame 2 by bushing (φ8×20mm stainless steel tube) (2 bearings are installed at each end, a total of 4 bearings / set of T-shaped frame 2). The bearing is in contact with the surface of the wire rope 8 (gap ≤0.2mm), and the rolling friction coefficient ≤0.05, ensuring flexible movement.

[0027] Lower straight arm 16: Made of Q235B rectangular steel pipe (section 80×40×3mm), length 1500-2000mm, the top is welded to the T-shaped frame of the guide wheel assembly (weld height 5mm), and the side is provided with traction rope 21 hanging ring 19 mounting holes (φ10mm). Adjustable sliding sleeve 17: Made of Q235B steel plate (8mm thick), stamped and formed, it slides with the lower straight arm 16 (a dovetail groove is opened on the inner side of the lower straight arm 16, and a matching dovetail boss is machined on the outer side of the sliding sleeve), and can slide up and down along the lower straight arm 16 (stroke 200mm). Two set screws 18 (M8×30mm stainless steel bolts) are installed through the side of the sliding sleeve, and the head of the set screws 18 abuts against the surface of the lower straight arm 16 (the contact surface is padded with copper sheet for anti-slip), which is used to fix the position of the sliding sleeve (claim 8). A hanging ring 19 (φ8mm stainless steel ring) is welded to the side of the sliding sleeve for connecting the traction rope 21 (φ8mm diameter nylon rope, breaking strength ≥5kN).

[0028] Mounting flange 20: Made of Q235B steel plate (15mm thick), 200mm in diameter, with a φ50mm through hole in the center (for inserting the detection device probe), and four M10 bolt holes evenly distributed along the bottom edge (for fixing the detection device). The bottom of the flange is adapted to install a concrete detection device (omitted in the diagram). The detection devices are divided into two types: Insertion probes (such as rheometer probes and rebar detectors): need to be inserted into the concrete (depth 50-200mm), probe diameter φ30-50mm, length 100-300mm; Non-penetrating probes (such as infrared thermal imager probes and ultrasonic detectors): only need to contact the concrete surface, with a probe diameter of φ50-100mm and a length of 50-100mm.

[0029] Taking the on-site construction quality inspection of a bridge concrete structure (50m long, 10m wide, 1.5m thick, concrete strength grade C50) as an example, the specific steps for implementing an auxiliary guidance method for large-scale on-site concrete quality inspection are as follows: Step S1: Installation and fixing of the wire mesh support section Positioning reinforcement: According to the design drawings of the base slab, select a vertical structural reinforcement (16mm in diameter, 2m spacing) and mark its top elevation (0.5m above the top surface of the base slab).

[0030] Install vertical pipe sleeve 1: Place two sets of vertical pipe sleeve 1 on the side walls of the two reinforcing bars respectively, and adjust the verticality of the pipe sleeve (use a level to calibrate, error ≤1°) to ensure that the pipe sleeve is perpendicular to the axis of the reinforcing bar.

[0031] Fixing the vertical pipe sleeve 1: Rotate the bottom set screw 2 (2 screws, 30mm apart) of the vertical pipe sleeve 1 until the head of set screw 2 is tightly against the side wall of the steel bar through the rubber gasket (control the tightening torque with a torque wrench, M10 bolt torque ≥30N·m).

[0032] Check stability: Gently shake the vertical pipe sleeve 1 to confirm that there is no looseness (shaking amount ≤1mm), and the installation of the steel wire frame is completed.

[0033] Step S2: Tensioning and leveling of wire rope 8 Threading the steel wire rope 8: Thread the two φ4mm steel wire ropes 8 through the pull plate 4 (lead wire groove 1 9), lead wire solenoid 5 (lead wire groove 2 10), and tensioning solenoid 6 (lead wire groove 3 11) at the top of the two sets of vertical pipe sleeves 1 respectively. Connect the ends of the steel wire ropes 8 to the tensioning block 7 (clamped with U-shaped clamps to ensure no slippage).

[0034] Initial tensioning: Use a ratchet wrench to rotate the tensioning sleeve 6 (one tensioning sleeve 6 corresponds to each group of wire ropes 8), and pull the wire rope 8 to a preliminary tensioned state (without obvious looseness). After the tensioning sleeve 6 is finally fixed, the direction of the lead wire groove 3 11 should be exactly opposite to that of the lead wire groove 1 9 and the lead wire groove 2 10 to prevent the wire rope 8 from coming off.

[0035] Precise leveling: Use a laser rangefinder to check the parallelism of the two steel wire ropes 8 (measure once every 2m along the span direction, error ≤1mm / m) and the mid-span deflection (measured with a level, error ≤5mm). If the requirements are not met, fine-tune the tensioning sleeve 6 (rotate 1 / 4 turn each time) until the requirements are met.

[0036] Locking tension: After tensioning, rotate tension nut 12 (M16) to lock tension sleeve 6 to prevent loosening (final tension F=8kN, verified by tension gauge).

[0037] Step S3: Assembly and debugging of the auxiliary guidance section Assemble the guide wheel assembly: Weld three sets of T-shaped frames 2 horizontally side by side to the top of the lower straight arm 16 (main T-shaped frame 2 13 in the center, auxiliary T-shaped frame 2 14 spaced 100mm apart), and use an angle grinder to grind the weld seam until it is smooth (without burrs).

[0038] Install guide wheel 15: Fix the stainless steel bearing (608ZZ) to both ends of the T-shaped frame 2 (2 bearings at each end) through the bushing. Use a feeler gauge to measure the gap between the bearing and the wire rope 8 (adjust the bushing position to ensure the gap is ≤0.2mm).

[0039] Connect the lower straight arm 16 to the resistance adjusting sleeve 17: fit the resistance adjusting sleeve 17 into the lower straight arm 16 (dovetail groove and dovetail boss fit together), slide it up and down along the lower straight arm 16 to test the flexibility (resistance ≤ 5N), and after confirming that there is no jamming, install the set screw 2 18 (M8×30mm) on the side of the sleeve.

[0040] Install flange 20: Fix flange 20 to the bottom of lower straight arm 16 with 4 M10 bolts (bolt torque ≥ 40 N·m), and check the flange levelness (use a level, error ≤ 0.5°).

[0041] Step S4: Detection and adjustment of position Move to the target area: Hold the traction rope 21 (φ8mm nylon rope) and pull the lower straight arm 16 along the steel wire rope 8 to move to the center area of ​​the base plate (target detection point).

[0042] Adjust the height of the adjusting sleeve 17: If using an insertion-type rheometer (probe diameter φ40mm, requires insertion 100mm into concrete): Rotate the set screw 18 (one screw) on the side of the adjusting sleeve 17 to lower the sleeve to 100mm below the lower straight arm 16 (as marked on the scale), aligning the rheometer probe at the bottom of the mounting flange 20 with the detection point (100mm depth). This will make pulling the traction rope 21 easier. Figure 1 As shown.

[0043] If using a non-insertive infrared thermal imager (the probe needs to contact the surface): Adjust the sliding sleeve upwards to 50mm above the lower straight arm 16, so that the probe contacts the base plate surface (distance ≤5mm). This will make pulling the traction rope 21 easier. Figure 2 As shown.

[0044] Verticality calibration: Use a laser plumb line to project a vertical reference line from the top surface of the base plate and check the deviation between the center of the mounting flange 20 and the reference line (≤2mm). If it does not meet the standard, fine-tune the position of the lower straight arm 16 (moving along the wire rope 8).

[0045] Step S5: Concrete quality inspection and data acquisition Penetration testing (rheometer): Start the rheometer (parameter settings: shear rate 0.1-10s⁻¹, sampling frequency 10Hz), and slowly insert it into the concrete (speed ≤5mm / s) until the probe reaches the predetermined depth (100mm).

[0046] Keep the probe stable (shaking amount ≤1mm) and record parameters such as static yield stress (τ0), dynamic yield stress (τ_d) and plastic viscosity (μ) (continuously collect data for 30 seconds and take the average value).

[0047] When moving, pull the traction rope 21 at a constant speed (0.3m / min) to ensure that the distance between adjacent detection points is ≤0.5m (marked by the scale line on the lower straight arm 16).

[0048] Non-penetrating detection (infrared thermal imager): Turn on the thermal imager (640×480 resolution, 30Hz frame rate), adjust the probe angle (perpendicular to the surface), and maintain a distance of 20-30mm.

[0049] Scan the base plate surface (speed 0.5m / min) to acquire temperature distribution images (temperature resolution 0.1℃), and use software to analyze and identify internal defects (such as abnormal temperature in the hollow area, temperature difference ≥5℃).

[0050] The system simultaneously records parameters such as ambient temperature (25℃) and concrete age (7 days), and uploads them to the cloud platform via a wireless module.

[0051] Step S6: Detection complete The area above the reinforced concrete 22 through which the wire rope 8 passes constitutes the detection area. Steps S1-S5 are repeated until all detection points in the detection area are detected.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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. An auxiliary guiding device for large-scale on-site concrete quality testing, comprising two sets of steel wire support sections and an auxiliary guiding section capable of moving back and forth between the two sets of steel wire support sections; Its features are: The steel wire support section includes a vertical pipe sleeve that is detachably installed on the vertically cast steel bars in the reinforced concrete, a steel wire tensioning assembly installed on the vertical pipe sleeve, and two steel wire ropes that are stretched parallel to each other above the reinforced concrete through the steel wire tensioning assembly. The auxiliary guiding part includes a guide wheel assembly that can move back and forth on a wire rope, a lower straight arm connected to the bottom of the guide wheel assembly, a traction rope connected to the side of the lower straight arm, and a mounting flange connected to the bottom of the lower straight arm.

2. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 1, characterized in that: The bottom side of the vertical pipe sleeve is fitted with at least two top screws arranged in an array, and the top of the top screw can firmly abut against the side wall of the vertically cast steel reinforcement.

3. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 2, characterized in that: The wire tensioning assembly includes a T-shaped frame fixedly installed at the top of the vertical tube sleeve, two wire pull reels fixed at the top of the T-shaped frame, a lead wire helium fixed to the outer wall of the wire pull reel, a tensioning sleeve threaded onto the lead wire helium, and a tensioning block connected to the end of the wire rope; the wire rope passes through the wire pull reel and the lead wire helium in sequence and is then pulled to a taut state by the tensioning block.

4. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 3, characterized in that: The pull reel and the lead wire solenoid are provided with lead wire groove one and lead wire groove two in sequence, and the tensioning screw sleeve is provided with lead wire groove three; the width of the opening of lead wire groove one, lead wire groove two and lead wire groove three is greater than the diameter of the steel wire rope.

5. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 4, characterized in that: A tensioning nut is also fixed to one end of the tensioning sleeve facing the cable reel.

6. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 5, characterized in that: The vertical tube sleeve has a groove through which a guide rope is drawn.

7. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 6, characterized in that: The guide wheel assembly includes three sets of T-shaped frames connected laterally to the top of the lower straight arm, and guide wheels rotatably mounted at both ends of the T-shaped frames. The second T-shaped frame, located in the middle of the three groups, is the main T-shaped frame. The main T-shaped frame and the lower support arm are set concentrically. The two T-shaped frames located on either side of the main T-shaped frame are auxiliary T-shaped frames, and the two sets of auxiliary T-shaped frames are symmetrically arranged about the main T-shaped frame.

8. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 7, characterized in that: The lower straight arm is fitted with an adjustable sliding sleeve that can slide up and down; at least one set screw 2 is installed through the side of the adjustable sliding sleeve, and the top of the set screw 2 can firmly abut against the side wall of the adjustable sliding sleeve; the side of the adjustable sliding sleeve is also connected to a hanging ring that is connected to the traction rope.

9. The auxiliary guiding device for large-scale on-site concrete quality testing according to claim 8, characterized in that: A concrete testing device is installed at the bottom of the mounting flange. The concrete testing device is classified according to whether it extends into the reinforced concrete, and is divided into testing instruments that extend into the reinforced concrete and testing instruments that do not extend into the reinforced concrete.

10. An auxiliary guidance method for large-scale on-site concrete quality testing, characterized in that: This method is implemented using the handheld concrete rheological property testing device according to claim 9, and the implementation steps are as follows: S1: Installation and fixing of the steel wire frame: The two sets of vertical pipe sleeves are disassembled and installed on the side walls of the two vertical cast steel bars in the concrete structure to be tested. The vertical pipe sleeves are fixed by pressing them against the side walls of the steel bars through at least two top screws on the bottom side of the vertical pipe sleeve. S2: Wire rope tensioning and leveling: Install a puller plate on the T-shaped frame at the top of each set of vertical pipe sleeves. Pass the two wire ropes through the lead groove one of the puller plate, then through the lead groove two of the lead solenoid, and finally tighten the wire ropes through the tensioning block of the tensioning sleeving. Rotate the tensioning sleeving to adjust the tension force so that the two wire ropes are parallel and taut above the concrete structure to form the test baseline. S3: Assembly and debugging of auxiliary guide parts: Connect the three sets of T-shaped frames 2 of the guide wheel assembly horizontally side by side to the top of the lower straight arm. The main T-shaped frame 2 is set concentrically with the lower straight arm, and the auxiliary T-shaped frames 2 are symmetrically distributed on both sides of the main T-shaped frame 2. Rotate the guide wheels to both ends of the T-shaped frame 2 to ensure that the guide wheel assembly can move back and forth along the wire rope. S4: Positioning and adjustment of the detection location: Connect the hanging ring on the side of the lower straight arm with the traction rope, hold the traction rope and pull the lower straight arm along the wire rope to move to the target detection area; S5: Concrete Quality Inspection and Data Acquisition: Inspection is conducted using the concrete inspection device installed at the bottom of the flange, and inspection data is recorded simultaneously. If the concrete inspection device is an instrument that extends into the reinforced concrete, the adjusting sleeve should be adjusted to below the lower straight arm. In this case, it is easier to move the lower straight arm by pulling it with the traction rope. If the concrete inspection device is an instrument that does not extend into the reinforced concrete, the adjusting sleeve should be adjusted to above the lower straight arm. In this case, it is easier to move the lower straight arm by pulling it with the traction rope. S6: Inspection complete: The area above the reinforced concrete through which the wire rope passes constitutes the inspection area. Repeat steps S1-S5 until all inspection points in the inspection area are inspected.

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