A non-destructive testing device for the effective anchoring length of an anchor rod

Abstract

This invention relates to the field of anchor bolt testing technology and discloses a non-destructive testing device for the effective anchorage length of anchor bolts. The device includes a sleeve and a testing unit. A sliding base is slidably disposed inside the sleeve. The sliding base has an arc-shaped mounting groove. One end of the sliding base is provided with a polishing structure. The polishing structure includes a pre-treatment structure, a positioning structure, a baffle, and a grinding disc. The anchor bolt to be tested passes through the positioning structure. After the positioning structure positions the anchor bolt, it contacts the outer surface of the grinding disc. The rotating grinding disc polishes the testing end of the anchor bolt. This invention, by setting a sliding base and a grinding disc, can pre-treat the testing end of the anchor bolt, improving the accuracy of anchor bolt testing.

Description

Technical Field

[0001] This invention relates to the field of anchor bolt testing technology, specifically a non-destructive testing device for the effective anchorage length of anchor bolts. Background Technology

[0002] With the widespread use of anchor bolts in engineering, the pull-out force test of anchor bolts is clearly no longer sufficient to meet the requirements for inspecting the anchor bolt anchoring quality. For full-length bonded anchor bolts, the length of qualified anchor bolts should meet the design value, and the grouting density should not be less than 75%. The effective anchoring length and grouting density of anchor bolts are the main parameters reflecting the anchoring quality of anchor bolts. Non-destructive testing of anchor bolts refers to testing methods that do not damage or alter the performance of anchor bolts. Currently, the most widely used and mature method is the acoustic reflection method, which has the characteristics of being non-destructive, convenient, and accurate. It has been widely used in non-destructive testing of anchor bolts. This method evaluates the construction quality of anchor bolts by studying the propagation of ultrasonic waves in the anchor bolt mortar-surrounding rock system, extracting reflection information, and quantitatively analyzing the average amplitude of the reflected superimposed waveforms.

[0003] Patent publication number CN118857180A discloses a non-destructive testing device and method for the effective anchorage length of an anchor bolt, including a support component, a testing component, and a cleaning component. The testing component includes a base; a testing instrument is fixedly connected to one side of the base; the cleaning component includes an outer cylinder; an inner cylinder is rotatably connected inside the outer cylinder; a mounting shell is fixedly connected to the surface of the outer cylinder; a rotating shaft is rotatably connected inside the mounting shell; a gear is fixedly connected to the surface of the rotating shaft; a gear ring is fixedly connected to the outer side of the inner cylinder; and a set of brush strips are evenly distributed on the inner side of the inner cylinder. During the gradual insertion of the anchor bolt into the inner cylinder, the rotating inner cylinder scrapes the surface of the anchor bolt through the friction of the brush strips, thereby removing laitance and improving the smoothness of the exposed section of the anchor bolt to prevent subsequent interference with the excitation and reception of sound waves. This eliminates the need for manual laitance treatment, reducing labor intensity. While the support and testing components effectively remove laitance, the device still has the following drawbacks during use: First, traditional testing devices require that the axis of the super magnetic vibration source be parallel to the axis of the anchor rod under test before testing the anchor rod. Therefore, it is necessary to ensure that the test end face of the anchor rod is flat. However, the existing anchor rod end face is usually bent or has protruding burrs due to factors such as processing or external damage, which affects the fit of the sensor and the accuracy of the test.

[0004] Secondly, when using non-destructive testing equipment, if there is laitance generated during construction on the surface of the exposed end of the anchor rod, the laitance will seriously affect the excitation and reception of the detection signal. It is necessary to manually remove the laitance to improve the detection accuracy of the anchor rod. This process is quite tedious, and the hardened laitance can easily cause injury to the workers.

[0005] Finally, the high-speed grinding of the anchor rod end by the grinding disc and the continuous friction of the brush against the slurry generate a large amount of high-temperature heat. The high temperature softens and hardens the slurry, forming a sticky gel that firmly adheres to the anchor rod body. The brush is difficult to remove it, and the high temperature interferes with the stable output of the magnetic resonance signal, further reducing the overall accuracy of the non-destructive testing of the anchor rod anchorage length. Summary of the Invention

[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a non-destructive testing device for the effective anchorage length of anchor bolts. It features end flatness testing, self-cleaning, anchor bolt bending detection, and automatic obstacle avoidance. This solves the problems of bent or burred anchor bolt test rods affecting sensor fit tightness, and excessively high anchor bolt surface temperature affecting testing accuracy.

[0007] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A non-destructive testing device for the effective anchorage length of an anchor bolt includes a sleeve and a testing device. A sliding base is slidably disposed inside the sleeve, and a polishing structure is provided at one end of the sliding base. The polishing structure includes: The pre-processed structure is rotatably mounted on the outer surface of the sliding base; A positioning structure is fixedly installed at one end of the sleeve; A baffle is fixedly installed at one end of the sliding base and has a mounting cavity; The grinding disc is rotatably mounted inside the mounting cavity; In this process, the anchor rod to be tested passes through the positioning structure. After the positioning structure positions the anchor rod, it makes contact with the outer surface of the grinding disc. The rotating grinding disc polishes the testing end of the anchor rod.

[0008] Preferably, the preprocessing structure includes: A brush plate is rotatably mounted inside a sliding base, and the outer surface of the brush plate has multiple brushes. A limiting groove is formed on the outer surface of the sliding base; The guide ring is fixedly installed on the outer surface of the brush plate and is slidably connected with the limiting groove; One end of the brush plate is provided with a linkage structure, which is connected to the grinding disc through the linkage structure. When the grinding disc rotates, it can drive the brush plate to rotate through the linkage structure. When the brush plate rotates, it scrapes the outer surface of the anchor rod.

[0009] Preferably, the positioning structure includes: The positioning shell is fixedly installed at one end of the sleeve. It has an annular hole for the anchor rod to pass through the positioning shell and enter the interior of the sleeve. The mounting block is fixedly installed on the inner wall of the positioning shell, and multiple limiting grooves are provided on the outer surface of the mounting block; The clamping blocks are slidably installed inside the limiting groove, and the outer surfaces of multiple clamping blocks are equipped with drive rollers; The drive disc is rotatably mounted inside the sleeve, and the outer surface of the drive disc has multiple arc-shaped grooves, which are slidably connected to multiple drive rollers respectively. The outer surface of the drive disk is provided with a drive structure, which can drive the drive disk to rotate. When the drive disk rotates, it can drive multiple drive rollers to move synchronously through the arc-shaped sliding groove, so that the multiple drive rollers respectively drive the clamping block to slide towards the center of the annular hole.

[0010] Preferably, the positioning shell has a cooling structure inside, the cooling structure comprising: A ring-shaped water delivery pipe is fixedly installed inside the positioning shell, and the inside of the ring-shaped water delivery pipe has a water storage chamber; The telescopic pipe is fixedly installed on the inner wall of the annular water delivery pipe, and one end of the telescopic pipe is connected to the water storage chamber. A water pump is fixedly installed on the outer surface of the sleeve, and a connecting pipe is provided at one end of the water pump, the connecting pipe being connected to the water storage chamber; The other end of the telescopic pipe is fixedly connected to the clamping block. The outer surface of the clamping block is provided with a water outlet, which is connected to the telescopic pipe. When the anchor rod to be tested passes through the positioning structure, the water pump is started to deliver external water to the inside of the clamping block and spray it onto the outer surface of the anchor rod through the water outlet.

[0011] Preferably, the inner wall of the sleeve is provided with a dust removal structure, the dust removal structure comprising: A fixed sleeve is fixedly installed on the inner wall of the sleeve and has a dust suction chamber; A through hole is formed on the outer surface of the fixed sleeve and communicates with the dust suction chamber; The outer surface of the fixed sleeve is provided with a dust suction pipe, and a vacuum cleaner is provided at one end of the dust suction pipe. By activating the vacuum cleaner, a negative pressure can be formed inside the dust suction chamber, and impurities scraped off inside the sleeve can be adsorbed through the through hole.

[0012] Preferably, the fixed sleeve has a reverse groove inside that corresponds to the limiting slide groove, the reverse groove has multiple protrusions inside, and the outer surface of the guide ring has multiple elastic particles, which slide and abut against the protrusions. When the brush plate rotates, it drives the guide ring to rotate, causing the guide ring to slide into the interior of the reverse groove. When the elastic particles come into contact with the protrusions, the elastic particles undergo elastic deformation. As the guide ring continues to rotate, it repeatedly squeezes the elastic particles, and under the action of elastic potential energy, the elastic particles push the guide ring in the opposite direction, causing the guide ring to shake and shake off the dust adhering to the brush surface.

[0013] Preferably, the bottom end face of the sliding base is provided with a clearance structure, the clearance structure including: It avoids the mounting block and is fixedly installed on the bottom end face of the sliding base; A sliding plate is slidably installed inside the clearance mounting block, and has slots at both ends, which are slidably connected to the inner wall of the clearance mounting block; An elastic plate is fixedly installed on the top of the inner wall of the clearance mounting block, and the outer surface of the elastic plate abuts against the sliding plate; The drive rod is slidably mounted between the sliding plate and the clearance mounting block; A connecting rod is rotatably mounted inside the sleeve, and the connecting rod is fixedly connected to the drive rod; The connecting rod is equipped with a first motor on one side. When the anchor rod is pre-treated, the first motor drives the connecting rod to rotate, which in turn drives the drive rod to rotate. During the rotation, the drive rod pushes the clearance mounting block to move upward, thereby causing the sliding base to slide upward and engage with the fixed sleeve. After the pre-treatment is completed, the connecting rod is rotated in the opposite direction, causing the sliding base to slide in the opposite direction and causing the baffle on one side to descend, thereby exposing the polished anchor rod.

[0014] Preferably, the guide ring is arc-shaped as a whole, and both ends of the guide ring are provided with conical protrusions. A limit ring is slidably provided inside the reverse groove, and both ends of the limit ring are provided with positioning grooves that can cooperate with the conical protrusions. The conical protrusion precisely aligns with the positioning groove. When the sliding base slides upward, the guide ring and the limiting ring precisely align, thereby guiding the rotation direction of the guide ring through the limiting ring. Furthermore, the limiting ring is set to shield the inner wall of the reverse groove to prevent mud and dirt from clogging the reverse groove.

[0015] Preferably, the sleeve is provided with an elastic telescopic rod inside, the telescopic end of the elastic telescopic rod is fixedly connected to the bottom end face of the sliding base, and the sleeve is provided with a distance sensor inside, the laser detection end of the distance sensor is correspondingly arranged to the bottom end face of the sliding base. When the anchor rod enters the sleeve, if the anchor rod is bent, it will squeeze and push the sliding base downward. When the position of the sliding base changes, it will be monitored by the distance sensor and an alarm will be issued.

[0016] Preferably, the linkage structure includes: A connecting ring is rotatably mounted on the outer surface of the baffle, and the connecting ring is located between the baffle and the grinding disc. The connecting ring is fixedly connected to the brush plate. The second gear is fixedly installed on the outer surface of the grinding disc; An idler wheel is rotatably mounted on the inner wall of the baffle, and the idler wheel is meshed with the second gear for transmission. The second toothed ring is fixedly installed on the outer surface of the connecting ring and meshes with the idler gear for transmission. When the grinding disc rotates, it drives the second gear to rotate synchronously, which in turn drives the idler wheel to rotate. The idler wheel then drives the second gear ring to rotate, and the rotating second gear ring drives the brush plate to rotate through the connecting ring, thereby driving the pretreatment structure to work.

[0017] (III) Beneficial Effects Compared with the prior art, the present invention provides a non-destructive testing device for the effective anchorage length of anchor bolts, which has the following advantages: 1. This non-destructive testing device for the effective anchorage length of anchor bolts features a sliding polishing structure inside the sleeve. Before testing the anchor bolt, a rotating grinding disc polishes and trims the bolt head, resolving issues caused by burrs or cuts on the anchor bolt surface leading to tip tilt. It effectively removes oxide layers, rust layers, and surface defects at the anchor bolt end, creating a smooth and clean acoustic testing reference surface. This ensures stable incident and accurate reflection of ultrasonic and other testing signals, eliminating interference from poor end-face quality on the effective anchorage length testing results and improving the accuracy of the testing data. Furthermore, after polishing the end, the device automatically avoids obstacles, eliminating the need to dismantle or separately relocate the polishing structure, thus improving the efficiency of end-point testing. 2. This non-destructive testing device for the effective anchorage length of anchor bolts uses a brush plate that can rotate in conjunction with the polishing structure to perform brush-type pretreatment on the anchor bolts. While polishing the end face, it rotates and scrapes away the loose rust, mortar deposits, and dust on the outer periphery of the anchor bolts, preventing dirt from entering the polishing area and affecting the polishing effect. Furthermore, the pretreatment structure and the polishing structure adopt a transmission linkage design and share the same power source, eliminating the need for additional drive devices and reducing energy consumption. This design can shorten the preparation time before testing. 3. This non-destructive testing device for the effective anchorage length of anchor rods has a positioning structure at one end of the sleeve, which can fix the position of the anchor rod during the pretreatment of the anchor rod. By having multiple clamping blocks synchronously retract towards the center, it can automatically center and clamp anchor rods of different diameters. This setting not only ensures the coaxiality of the anchor rod and the polishing mechanism, avoiding uneven polishing and detection benchmark offset caused by eccentricity, but also adapts to the detection of various specifications of anchor rods, improving the versatility of the device and the consistency of the test results.

[0018] 4. The non-destructive testing device for the effective anchorage length of anchor rods has a water outlet and a water distribution groove inside the clamping block. When the anchor rod passes through the positioning structure, cooling water is sprayed onto the outer surface of the anchor rod through the water outlet. This cooling water can not only reduce the temperature of the anchor rod itself and the temperature generated by friction during pretreatment, but also soften the hardened laitance on the surface of the anchor rod, making it easier for the brush to scrape off the hardened impurities, thus improving the effect and efficiency of pretreatment. 5. The non-destructive testing device for the effective anchorage length of anchor rods has a distance sensor and a corresponding clearance structure installed on the bottom end face of the sliding base. When the test end of the anchor rod enters between the sliding base and the fixed sleeve, the bent test rod head will squeeze the closed sliding base and fixed sleeve, causing the sliding base to slide downward. This sliding distance is detected by the distance sensor. By measuring the sliding distance of the sliding base, it can be determined whether the straightness of the test rod head meets the testing standard. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a side view of the present invention.

[0021] Figure 3 for Figure 2 Planar sectional view at point AA.

[0022] Figure 4 This is a schematic diagram of the positioning structure of the present invention.

[0023] Figure 5 This is an exploded structural diagram of the positioning structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the clamping block.

[0025] Figure 7 A structural diagram to avoid the structure.

[0026] Figure 8 This is a schematic diagram of the sliding base.

[0027] Figure 9 This is a schematic diagram of the brush plate structure.

[0028] Figure 10 This is a schematic diagram of the fixed sleeve structure.

[0029] Figure 11 This is a schematic diagram of a linkage structure.

[0030] Figure 12 This is a schematic diagram of the internal structure of the sleeve. In the diagram: Sleeve 10, Positioning shell 11, Mounting block 12, Annular water supply pipe 13, Clamping block 14, Drive roller 15, Telescopic pipe 16, Drive disc 17, First toothed ring 18, Arc-shaped slide groove 19, First gear 20, Elastic telescopic rod 21, Distance sensor 22, Sliding base 23, Fixed sleeve 24, Water outlet 25, Brush plate 26, Limiting slide groove 27, Guide ring 28, Dust suction port 29, Elastic particle 30, Reverse groove 31, Protrusion 32, Through hole 33, Avoidance mounting block 34, Elastic plate 35, Sliding plate 36, Drive rod 37, Connecting rod 38, Connecting ring 39, Grinding disc 40, Second gear 41, Idler wheel 42, Baffle 43, Detection device 44, Sealing protrusion 45, Limiting ring 46, Water pump 47, Second toothed ring 48, Connecting pipe 49, Sealing ring 50. Detailed Implementation

[0031] 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.

[0032] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "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.

[0033] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Example 1: This embodiment provides a non-destructive testing device for the effective anchorage length of anchor bolts, which has the following technical features.

[0036] Please see Figures 7-11 This non-destructive testing device for the effective anchorage length of anchor bolts includes a sleeve 10 and a testing device 44. The testing device 44 is installed at one end of the sleeve 10. The testing device 44 uses conventional technology, and the specific testing method and usage will not be elaborated in detail here. It is mainly used to test the density of the anchor bolts. A sliding base 23 with an arc-shaped mounting groove is slidably arranged inside the sleeve 10. A polishing structure is provided at one end of the sliding base 23. The polishing structure includes a pretreatment structure and a positioning structure. The pretreatment structure is rotatably installed on the outer surface of the sliding base 23, and the positioning structure is fixedly installed at one end of the sleeve 10. A grinding structure is provided at one end of the sliding base 23. The grinding structure includes a baffle 43. The baffle 43 has a mounting cavity inside. A grinding disc 40 is rotatably mounted, and a drive motor is mounted on one side of the baffle 43. The output end of the drive motor is fixedly connected to the grinding disc 40. A fixed sleeve 24 is provided inside the sleeve 10. The fixed sleeve 24 can close with the sliding base 23 to form a circular sleeve. Before testing the anchor rod, it is necessary to ensure that the test rod head of the anchor rod has a flat end face to ensure the accuracy of the test data. Therefore, the surface of the anchor rod needs to be cleaned and polished by the pretreatment structure. When the anchor rod to be tested passes through the positioning structure, the anchor rod is first positioned by the positioning structure so that the test end of the anchor rod contacts the outer surface of the grinding disc 40. Then, the drive motor is started, and the output end of the drive motor drives the rotating grinding disc 40 to polish the test end of the anchor rod.

[0037] Further, see Figures 7-11The exposed surface of the anchor bolt has laitance generated during construction, which severely affects the excitation and reception of detection signals. Therefore, it is necessary to remove the laitance to improve the detection accuracy of the anchor bolt. Thus, a pretreatment structure is installed in the arc-shaped mounting groove of the sliding base 23. This pretreatment structure is used to remove laitance and impurities from the exposed surface of the anchor bolt before polishing. The pretreatment structure includes limiting grooves 27 formed on the outer surface of the arc-shaped mounting groove of the sliding base 23. Guide rings 28 are slidably arranged inside the multiple limiting grooves 27. A brush plate 26 is commonly provided on the outer surface of the multiple guide rings 28. Multiple brushes are arranged on the brush plate 26 facing the outer surface of the fixed sleeve 24, and a linkage structure is provided at one end of the brush plate 26. This linkage structure transmits the power of the drive motor to the brush plate 26, so that while the grinding disc 40 polishes the anchor bolt head, it simultaneously drives the brush plate 26 to rotate synchronously, thereby scraping and cleaning the laitance and impurities from the exposed end of the anchor bolt.

[0038] Specifically, see Figures 7-11The linkage structure includes a connecting ring 39. The connecting ring 39 is rotatably mounted between the baffle 43 and the grinding disc 40, and is fixedly connected to the brush plate 26. A second gear 41 is fixedly mounted on the outer surface of the grinding disc 40. An idler gear 42 is meshed and driven on one side of the second gear 41. The idler gear 42 is rotatably mounted on the inner wall of the baffle 43. A second toothed ring 48 is meshed and driven below the idler gear 42, and is fixedly connected to the connecting ring 39. When the drive motor drives the grinding disc 40 to rotate through its output shaft, the rotating grinding disc 40 drives the second gear 41 to rotate synchronously, thereby causing the second gear 41 to drive the idler gear 42 to mesh and rotate, and the idler gear 42 to drive the second toothed ring 48 to rotate. After the second toothed ring 48 rotates, it drives the brush plate 26 to rotate through the connecting ring 39, thereby driving the pretreatment structure to work, achieving synchronous cleaning of the laitance and impurities at the exposed end of the anchor bolt, ensuring the cleanliness of the base surface for subsequent polishing. The inner wall of the fixed sleeve 24 is provided with a reverse groove 31, which corresponds to the limiting slide groove 27. During the rotation of the brush plate 26, the brush plate 26 drives the guide ring 28 to rotate, causing the guide ring 28 to slide along the trajectory of the limiting slide groove 27 into the interior of the reverse groove 31. The reverse groove 31 and the limiting slide groove 27 limit the guide ring 28 and the brush plate 26, preventing radial displacement of the brush plate 26 during rotation and thus improving its stability. Furthermore, the inner wall of the connecting ring 39 is provided with a sealing protrusion 45, and the circumferential surface of the grinding disc 40 is provided with a slide groove that slides in conjunction with the sealing protrusion 45. When the grinding disc 40 rotates, the sealing protrusion 45 can slide along the slide groove, thereby axially limiting the grinding disc 40 and preventing axial movement during high-speed rotation, ensuring the stability of the polishing process. This design also prevents debris generated during polishing by the grinding disc 40 from entering the gap between the grinding disc 40 and the baffle 43, thus avoiding debris accumulation that could affect the normal operation of the transmission components.

[0039] Further, see Figures 7-11To promptly remove debris and dust generated during polishing and scraping, and to prevent their accumulation from affecting detection accuracy or damaging the equipment, a dust removal structure is provided inside the fixed sleeve 24. The dust removal structure includes the fixed sleeve 24 and a suction chamber inside it. Multiple through holes 33 are provided on the outer surface of the fixed sleeve 24, communicating with the suction chamber. A suction pipe is provided on the outer surface of the fixed sleeve 24, with a vacuum cleaner at one end. By activating the vacuum cleaner, a negative pressure is created inside the suction chamber, adsorbing impurities scraped from inside the sleeve 10 through the through holes 33. However, some impurities scraped by the brush plate 26 adhere to the outer surface of the brush and are difficult to clean. Therefore, a protrusion 32 is provided inside the reverse groove 31, and multiple elastic particles 30 are provided on the outer surface of the guide ring 28. The elastic particles 30 slide against the protrusion 32, and are made of elastic material. When the brush plate 26 rotates, it drives the guide ring 28 to rotate, causing the guide ring 28 to slide into the interior of the reverse groove 31. When the elastic particles 30 come into contact with the protrusions 32, the elastic particles 30 undergo elastic deformation. As the guide ring 28 continues to rotate, it repeatedly squeezes the elastic particles 30, and under the action of elastic potential energy, the elastic particles 30 push the guide ring 28 in the opposite direction, causing the guide ring 28 to vibrate and shake off the dust adhering to the surface of the brush plate 26. At the same time, in conjunction with the negative pressure adsorption of the vacuum cleaner, the detached debris is sucked into the suction chamber and discharged. Meanwhile, on the outer surface of the brush plate 26, between the multiple layers of brushes, there are suction ports 29. By setting the suction ports 29, the shaken-off dust and scraped-off dust will be concentrated between the brush plates, and through the suction ports 29 and the adsorption effect of the through holes 33, dust and impurities can pass through the brush plate 26 and enter the interior of the through holes 33, thereby achieving continuous cleaning of the inside of the equipment.

[0040] For details, please refer to Figures 7-11 The guide ring 28 is arc-shaped, and both ends of the guide ring 28 are provided with conical protrusions. The inside of the reverse groove 31 is provided with a limit ring 46. Both ends of the limit ring 46 are provided with positioning grooves that can cooperate with the conical protrusions. The conical protrusions and positioning grooves are precisely aligned. When the sliding base 23 slides upward, the guide ring 28 and the limit ring 46 are precisely aligned, thereby guiding the rotation direction of the guide ring 28 through the limit ring 46. Furthermore, by setting the limit ring 46 to block the inner wall of the reverse groove 31, the reverse groove 31 is prevented from being blocked by mud and dirt, thus improving the stability of the device operation.

[0041] Further, see Figures 1-6To accurately position and clamp the anchor rod before polishing inspection, and to prevent the device from shaking during grinding and pretreatment, a positioning structure is provided inside the sleeve 10. The positioning structure includes a positioning shell 11, which is fixedly installed at one end of the sleeve 10. The positioning shell 11 has an annular hole for the anchor rod to pass through the positioning shell 11 and enter the interior of the sleeve 10. An installation block 12 is fixedly installed on the inner wall of the positioning shell 11, and multiple limiting grooves are formed on the outer surface of the installation block 12. A clamping block 14 is slidably disposed inside the limiting groove, and a drive roller 15 is provided on the outer surface of each clamping block 14. A drive disk 17 is provided on the outer surface of each drive roller 15, and the drive disk 17 is rotatably installed inside the sleeve 10. Multiple arc-shaped sliding grooves 19 are provided on the outer surface of the drive disk 17, and these arc-shaped sliding grooves 19 are slidably connected to the multiple drive rollers 15. The multiple arc-shaped sliding grooves 19 are arc-shaped, and one end of each arc-shaped sliding groove extends towards the center of the drive disk 17. Furthermore, a driving structure is provided on the outer surface of the drive disk 17 for driving the drive disk 17 to rotate. The driving structure includes a first gear ring 18 mounted on the circumferential surface of the drive disk 17. A second motor is provided below the first gear ring 18 inside the sleeve 10. A first gear 20 is provided on the output shaft of the second motor, and the first gear 20 is meshed and connected to the first gear ring 18. When positioning the anchor rod, the second motor is started, and the second motor drives the first gear 20 to rotate. The first gear 20 drives the first gear ring 18 to rotate through meshing transmission, thereby driving the drive disk 17 to rotate. When the drive disk 17 rotates, it drives multiple arc-shaped sliding grooves 19 to rotate synchronously. Since the arc-shaped sliding grooves 19 are slidably connected to the drive roller 15, and one end of the arc-shaped sliding groove 19 extends towards the center, it pushes the drive roller 15 to slide along the limiting groove towards the center, thereby driving the clamping block 14 to move towards the center of the annular hole, thereby clamping and fixing the anchor rod passing through the annular hole.

[0042] Further, see Figures 1-6The surface temperature of the anchor rod affects the polishing effect and the accuracy of the test data. Furthermore, if the heat generated during high-speed friction cannot be dissipated in time, it may cause thermal deformation or damage to the anchor rod surface material. Therefore, to effectively cool the anchor rod, a cooling structure is installed inside the sleeve 10. The cooling structure includes an annular water supply pipe 13 fixedly installed inside the positioning shell 11, with a water storage chamber inside the annular water supply pipe 13. A telescopic pipe 16 is fixedly installed on the inner wall of the annular water supply pipe 13, and one end of the telescopic pipe 16 is connected to the water storage chamber. A water pump 47 is fixedly installed on the outer surface of the sleeve 10, and one end of the water pump 47 is connected to a connecting pipe 49, which is connected to the water storage chamber. An inlet is located on one side of the water pump 47, allowing external water to enter the pump 47 through the inlet and be transported to the water storage chamber of the annular water supply pipe 13 via the connecting pipe 49. The other end of the telescopic pipe 16 is fixedly connected to the clamping block 14, and the outer surface of the clamping block 14 is provided with a water outlet 25, which is connected to the telescopic pipe 16. When the anchor rod to be tested passes through the positioning structure, the water pump 47 is activated to deliver external water to the inside of the clamping block 14 and spray it onto the outer surface of the anchor rod through the outlet 25. This cools the anchor rod surface, removes the heat generated by friction, and washes away the debris and dust generated during the grinding and pretreatment process. It also softens stubborn stains adhering to the anchor rod surface, facilitating subsequent polishing and surface quality inspection. It should be noted that multiple water outlets are provided on the inner wall of the limiting groove. When the clamping block 14 is not extended from the limiting groove, to prevent the clamping block 14 from sticking to the outer surface of the limiting groove and causing the outlet 25 to become blocked, water outlets are provided to allow the water to spray out smoothly through the outlets. The outlets are inclined, with the inclined openings facing the inside of the sleeve 10. This design increases the contact area between the cooling water and the anchor rod, improving the heat dissipation effect.

[0043] Further, see Figures 1-12The detection device 44 is located at one end of the sleeve 10. The polishing structure is located between the detection device 44 and the anchor rod detection end. In order to avoid the dust generated during polishing and pretreatment from affecting the detection device 44, a sealing ring 50 is provided on the inner wall of the sleeve 10. The baffle 43 is slidably connected to the sealing ring 50. The baffle 43 is slidably connected to one side of the sealing ring 50 to form a sealed space between the sleeve 10 and the detection device 44, so as to prevent the dust generated during polishing from affecting the detection device 44. After pretreatment, to prevent the baffle 43 from obstructing the detection device 44 and hindering its detection, a clearance structure is provided on the bottom end face of the sliding base 23. This clearance structure includes a clearance mounting block 34 installed on the bottom end face of the sliding base 23. A sliding plate 36 is slidably mounted inside the clearance mounting block 34. Both ends of the sliding plate 36 have slots that slide and engage with the interior of the clearance mounting block 34. An elastic plate 35 is provided on the top of the inner wall of the clearance mounting block 34, and the outer surface of the elastic plate 35 abuts against the sliding plate 36. A drive rod 37 is slidably mounted inside the clearance mounting block 34, and the drive rod 37 is located between the sliding plate 36 and the clearance mounting block 34. A connecting rod 38 is provided at one end of the sleeve 7. A first motor is provided inside the sleeve 10. The output shaft of the first motor is fixedly connected to the connecting rod 38 and is used to drive the connecting rod 38 to rotate. When the anchor rod is pre-treated, the first motor drives the connecting rod 38 to rotate, which causes the connecting rod 38 to drive the driving rod 37 to rotate. During the rotation, the driving rod 37 pushes the clearance mounting block 34 to move upward, thereby causing the sliding base 23 to slide upward, so that the sliding base 23 is engaged with the fixed sleeve 24. After the pre-treatment is completed, the connecting rod 38 is rotated in the opposite direction, causing the sliding base 23 to slide in the opposite direction and causing the baffle 43 on one side to descend, thereby exposing the polished anchor rod inspection end, so that the inspection device 44 can inspect the inspection end.

[0044] Further, see Figures 2-3The straightness of the anchor bolt has a significant impact on the detection accuracy. If the anchor bolt is bent or has a straightness deviation, local stress concentration occurs at the bend, increasing the propagation path. The instrument defaults to using a fixed longitudinal wave velocity for calculation, and the system calculates the straight-line distance. The measured propagation time does not match the theoretical value, directly causing the effective anchorage length to be calculated too high or too low, resulting in inaccurate detection values ​​and affecting the accuracy of the detection results. To address this, the device integrates a straightness monitoring structure. An elastic telescopic rod 21 is installed inside the sleeve 10, and the telescopic end of the elastic telescopic rod 21 is fixedly connected to the bottom end face of the sliding base 23. A distance sensor 22 is installed inside the sleeve 10, and the laser detection end of the distance sensor 22 is correspondingly set to the bottom end face of the sliding base 23. When the anchor bolt enters the sleeve 10, the sliding base 23 and the fixed sleeve 24 are in a closed state, forming a straight sleeve shape. If the anchor bolt is bent, it will squeeze and push the sliding base 23 downward. When the position of the sliding base 23 changes, it will be monitored by the distance sensor 22 and an alarm will be issued. The straightness of the anchor rod can be judged by the sliding distance of the sliding base 23.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-destructive testing device for the effective anchorage length of an anchor bolt, comprising a sleeve (10) and a testing device (44), characterized in that, The sleeve (10) is slidably provided with a sliding base (23), and one end of the sliding base (23) is provided with a polishing structure, the polishing structure including: The pre-processed structure is rotatably mounted on the outer surface of the sliding base (23); The positioning structure is fixedly installed at one end of the sleeve (10); A baffle (43) is fixedly installed at one end of the sliding base (23) and has a mounting cavity; The grinding disc (40) is rotatably installed inside the mounting cavity; In this process, the anchor rod to be tested passes through the positioning structure. After the positioning structure positions the anchor rod, it makes the anchor rod contact the outer surface of the polishing disc (40). The rotating polishing disc (40) polishes the test end of the anchor rod.

2. The non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 1, characterized in that, The preprocessing structure includes: The brush plate (26) is rotatably mounted inside the sliding base (23), and the outer surface of the brush plate (26) has a plurality of brushes; A limiting groove (27) is formed on the outer surface of the sliding base (23); The guide ring (28) is fixedly installed on the outer surface of the brush plate (26) and is slidably connected to the limiting groove (27); One end of the brush plate (26) is provided with a linkage structure, which is connected to the grinding disc (40) through the linkage structure. When the grinding disc (40) rotates, the brush plate (26) can be driven to rotate through the linkage structure. When the brush plate (26) rotates, it scrapes the outer surface of the anchor rod.

3. The non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 1, characterized in that, The positioning structure includes: The positioning shell (11) is fixedly installed at one end of the sleeve (10) and has an annular hole for the anchor rod to pass through the positioning shell (11) and enter the interior of the sleeve (10); The mounting block (12) is fixedly installed on the inner wall of the positioning shell (11), and multiple limiting grooves are provided on the outer surface of the mounting block (12); Clamping blocks (14) are slidably installed inside the limiting groove, and the outer surfaces of multiple clamping blocks (14) are all equipped with drive rollers (15). The drive disk (17) is rotatably mounted inside the sleeve (10), and the outer surface of the drive disk (17) has a plurality of arc-shaped grooves (19), which are slidably connected to a plurality of drive rollers (15); The outer surface of the drive disk (17) is provided with a drive structure, which can drive the drive disk (17) to rotate. When the drive disk (17) rotates, it can drive multiple drive rollers (15) to move synchronously through the arc-shaped slide groove (19), so that the multiple drive rollers (15) respectively drive the clamping block (14) to slide towards the center of the annular hole.

4. The non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 3, characterized in that, The positioning shell (11) is provided with a cooling structure inside, the cooling structure including: The annular water supply pipe (13) is fixedly installed inside the positioning shell (11), and the annular water supply pipe (13) has a water storage cavity inside; The telescopic pipe (16) is fixedly installed on the inner wall of the annular water supply pipe (13), and one end of the telescopic pipe (16) is connected to the water storage chamber; A water pump (47) is fixedly installed on the outer surface of the sleeve (10), and a connecting pipe (49) is provided at one end of the water pump (47), which is connected to the water storage chamber; The other end of the telescopic pipe (16) is fixedly connected to the clamping block (14). The outer surface of the clamping block (14) is provided with a water outlet (25). The water outlet (25) is connected to the telescopic pipe (16). When the anchor rod to be tested passes through the positioning structure, the water pump (47) is started to deliver external water to the inside of the clamping block (14) and spray it on the outer surface of the anchor rod through the water outlet (25).

5. A non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 2, characterized in that, The inner wall of the sleeve (10) is provided with a dust removal structure, the dust removal structure including: A fixed sleeve (24) is fixedly installed on the inner wall of the sleeve (10) and has a dust suction chamber; A through hole (33) is formed on the outer surface of the fixed sleeve (24) and communicates with the dust suction chamber; The outer surface of the fixed sleeve (24) is provided with a dust suction pipe, and a vacuum cleaner is provided at one end of the dust suction pipe. By starting the vacuum cleaner, a negative pressure can be formed inside the dust suction chamber, and the impurities scraped off inside the sleeve (10) can be adsorbed through the through hole (33).

6. A non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 5, characterized in that, The fixed sleeve (24) has a reverse groove (31) inside that corresponds to the limiting slide groove (27). The reverse groove (31) has multiple protrusions (32) inside. The outer surface of the guide ring (28) has multiple elastic particles (30). The elastic particles (30) slide against the protrusions (32). When the brush plate (26) rotates, it can drive the guide ring (28) to rotate, so that the guide ring (28) slides into the interior of the reverse groove (31). When the elastic particle (30) comes into contact with the protrusion (32), the elastic particle (30) will undergo elastic deformation. As the guide ring (28) continues to rotate and repeatedly squeezes the elastic particle (30), the elastic particle (30) pushes the guide ring (28) in the opposite direction under the action of elastic potential energy, so that the guide ring (28) shakes and shakes off the dust adhering to the surface of the brush plate (26).

7. A non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 1, characterized in that, The bottom end face of the sliding base (23) is provided with a clearance structure, the clearance structure including: The mounting block (34) is avoided and fixedly installed on the bottom end face of the sliding base (23); The sliding plate (36) is slidably installed inside the clearance mounting block (34) and has slots at both ends, which are slidably connected to the inner wall of the clearance mounting block (34); An elastic plate (35) is fixedly installed on the top of the inner wall of the clearance mounting block (34), and the outer surface of the elastic plate (35) abuts against the sliding plate (36); The drive rod (37) is slidably mounted between the sliding plate (36) and the clearance mounting block (34); The connecting rod (38) is rotatably mounted inside the sleeve (10), and the connecting rod (38) is fixedly connected to the drive rod (37); The first motor is provided on one side of the connecting rod (38). When the anchor rod is pre-treated, the first motor drives the connecting rod (38) to rotate, so that the connecting rod (38) drives the driving rod (37) to rotate. During the rotation, the driving rod (37) pushes the avoidance mounting block (34) to move upward, thereby driving the sliding base (23) to slide upward, so that the sliding base (23) is engaged with the fixed sleeve (24). After the pre-treatment is completed, the connecting rod (38) is rotated in the opposite direction, so that the sliding base (23) slides in the opposite direction and drives the baffle (43) on one side to descend, thereby exposing the polished anchor rod.

8. A non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 6, characterized in that, The guide ring (28) is arc-shaped in general, and both ends of the guide ring (28) are provided with conical protrusions. The reverse groove (31) is slidably provided with a limiting ring (46), and both ends of the limiting ring (46) are provided with positioning grooves that can cooperate with the conical protrusions. The conical protrusion precisely engages with the positioning groove. When the sliding base (23) slides upward, the guide ring (28) and the limiting ring (46) precisely engage. The limiting ring (46) guides the rotation direction of the guide ring (28). The limiting ring (46) also blocks the inner wall of the reverse groove (31) to prevent mud and dirt from clogging the reverse groove (31).

9. A non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 1, characterized in that, The sleeve (10) is provided with an elastic telescopic rod (21) inside. The telescopic end of the elastic telescopic rod (21) is fixedly connected to the bottom end face of the sliding base (23). The sleeve (10) is provided with a distance sensor (22) inside. The laser detection end of the distance sensor (22) is correspondingly set to the bottom end face of the sliding base (23). When the anchor rod enters the sleeve (10), if the anchor rod is bent, it will squeeze and push the sliding base (23) to slide downward. When the position of the sliding base (23) changes, it will be monitored by the distance sensor (22) and an alarm will be issued.

10. A non-destructive testing device for the effective anchorage length of an anchor bolt according to claim 2, characterized in that, The linkage structure includes: A connecting ring (39) is rotatably mounted on the outer surface of the baffle (43), and the connecting ring (39) is located between the baffle (43) and the grinding disc (40). The connecting ring (39) is fixedly connected to the brush plate (26). The second gear (41) is fixedly installed on the outer surface of the grinding disc (40); An idler wheel (42) is rotatably mounted on the inner wall of a baffle (43), and the idler wheel (42) is meshed with a second gear (41) for transmission. The second toothed ring (48) is fixedly installed on the outer surface of the connecting ring (39) and meshes with the idler wheel (42) for transmission. When the grinding disc (40) rotates, it can drive the second gear (41) to rotate synchronously, so that the second gear (41) drives the idler wheel (42) to mesh and rotate, and drives the second gear ring (48) to rotate through the idler wheel (42). After the second gear ring (48) rotates, it drives the brush plate (26) to rotate through the connecting ring (39), thereby driving the pretreatment structure to work.

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