Ultrasonic testing device for pile foundations

Abstract

This utility model discloses an ultrasonic testing device for pile foundations, including a positioning component and a fixing plate. The fixing plate is fixedly connected to the top surface of the ultrasonic testing instrument, and its outer periphery protrudes beyond the outer periphery of the ultrasonic testing instrument. The outer periphery of the fixing plate is smaller than the inner diameter of the sonic logging tube. The positioning component includes an integrally formed sleeve and a collar. The central axes of the sleeve and the collar coincide with the central axis of the sonic logging tube. The sleeve is inserted tightly into the sonic logging tube, and the collar rests on the top of the sonic logging tube. A mounting plate is also provided on the collar, on which a positioning wheel is mounted. The traction connection line of the ultrasonic testing instrument is guided upward from the inside of the sonic logging tube through the positioning wheel. The positioning wheel has a concave guide arc surface, and its surface tangent coincides with the central axis of the sonic logging tube. This utility model achieves stability and reliability of the ultrasonic testing instrument during lowering and raising, while maintaining as much overlap as possible with the pile foundation axis, thereby ensuring the accuracy of the test results.

Description

Technical Field

[0001] This utility model relates to the field of pile foundation testing technology. More specifically, this utility model relates to an ultrasonic testing device for pile foundations. Background Technology

[0002] The principle of ultrasonic testing for pile foundations is based on the propagation characteristics of ultrasonic waves in concrete. Multiple acoustic logging tubes are pre-embedded in the pile foundation to form a testing channel. During testing, the acoustic logging tubes are filled with water as a coupling agent, and the ultrasonic testing instrument is placed inside. Typically, transmitting and receiving probes (collectively referred to as ultrasonic testing instruments) are placed in multiple acoustic logging tubes to the bottom of the tubes. The transmitting and receiving probes move synchronously upwards within the tubes to detect defects in the pile foundation. The ultrasonic instrument excites the transmitting transducer to generate high-frequency elastic pulse waves. When these waves propagate in the concrete, if they encounter internal defects (such as voids, cracks, segregation, etc.), they will be reflected, transmitted, diffracted, and scattered, causing changes in parameters such as the acoustic time, amplitude, frequency, and waveform of the received signal. By analyzing these anomalies, the integrity of the pile concrete, the location and nature of defects can be determined.

[0003] The main problems encountered in testing pile foundation performance using ultrasonic waves are as follows: 1) The stability and reliability of the ultrasonic testing instrument during the lowering process. The ultrasonic testing instrument needs to be stably lowered into the pile foundation to avoid problems such as shaking or collision with the pile foundation that could cause damage; 2) The ultrasonic testing instrument needs to be kept as close as possible to the pile foundation axis during the lowering and raising process to ensure the accuracy of the test results; 3) The traction connection lines corresponding to the ultrasonic testing instruments in multiple sonic logging tubes need to be lowered or raised stably and synchronously to ensure accurate detection of defects in the pile foundation. Utility Model Content

[0004] One objective of this invention is to provide an ultrasonic testing device for pile foundations, which achieves stability and reliability of the ultrasonic testing instrument during lowering and raising, while maintaining as much overlap as possible with the pile foundation axis, thereby ensuring the accuracy of the testing results.

[0005] To solve the above-mentioned technical problems, this utility model provides an ultrasonic testing device for pile foundations, including a positioning component and a fixing plate. The fixing plate is fixedly connected to the top surface of the ultrasonic testing instrument, and the outer periphery of the fixing plate protrudes beyond the outer periphery of the ultrasonic testing instrument. The outer periphery of the fixing plate is smaller than the inner diameter of the sonic logging tube. The positioning component includes an integrally formed sleeve and a collar. The central axes of the sleeve and the collar coincide with the central axis of the sonic logging tube. The sleeve is inserted tightly into the sonic logging tube, and the collar rests on the top of the sonic logging tube. An mounting plate is also provided on the collar, on which a positioning wheel is mounted. The traction connection line of the ultrasonic testing instrument is guided upward from the inside of the sonic logging tube through the positioning wheel. The positioning wheel has a concave guide arc surface, and its surface tangent is arranged to coincide with the central axis of the sonic logging tube.

[0006] Preferably, the lower end of the sleeve is also detachably connected to a guide rod, which has a channel through which the traction connecting line passes.

[0007] Preferably, multiple sonic logging tubes corresponding to the same pile foundation have multiple connecting columns fixedly connected to multiple collars. All connecting columns are connected to a fixed block. A large gear is set at the center of the fixed block, which is driven to rotate by a motor. Multiple small gears are meshed around the outer periphery of the large gear. The center of the small gear is fixedly sleeved on a drive shaft that is rotatably connected to the fixed block. Multiple traction connecting lines leading out from the multiple sonic logging tubes are wound around the corresponding drive shafts one by one. The drive shaft is a winding shaft. Initially, the lengths of the multiple traction connecting lines leading out from the multiple sonic logging tubes from the ultrasonic detector to the winding shaft are equal. The rotation of the large gear drives the multiple small gears to rotate synchronously, thereby driving the ultrasonic detector to rise or fall synchronously.

[0008] Preferably, the fixing block is fixed at the center of the pile foundation by a fixing frame on the ground outside the pile foundation.

[0009] Preferably, the outer periphery of the fixing block is circular and has a concave annular slide, and the connecting column is slidably disposed in the annular slide and detachably connected by bolts.

[0010] Preferably, the positioning wheel is provided with a limit plate, which forms a space between itself and the guide arc surface that does not interfere with the traction connection line.

[0011] Preferably, the outer periphery of the fixing plate is provided with a rubber layer, the outer diameter of which is equal to the inner diameter of the acoustic tube.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. This utility model avoids damage caused by collision between the ultrasonic detector and the pile foundation by setting a fixing plate, and ensures the stability and reliability of the ultrasonic detector during the lowering and rising process by setting positioning parts and guide rods.

[0014] 2. This utility model ensures, on the one hand, that the ultrasonic detector maintains as close as possible to the pile foundation axis as possible during the lowering and raising process by installing positioning wheels; on the other hand, the guide rod further guides the traction connection line, thereby ensuring as close as possible to the pile foundation axis and thus guaranteeing the accuracy of the test results.

[0015] 3. This utility model, through the fixing block and its structural design, ensures that the traction connection lines corresponding to the ultrasonic detectors in multiple sonic logging tubes are synchronously and stably lowered or raised, thus ensuring accurate detection of defects in the pile foundation.

[0016] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of one of the acoustic logging tubes of this utility model;

[0018] Figure 2 This is a top view of the overall structure of this utility model;

[0019] Figure 3 This is an enlarged view of the positioning wheel of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Pile foundation; 2. Acoustic logging tube; 3. Ultrasonic testing instrument; 4. Fixing plate; 5. Traction connecting line; 6. Guide rod; 7. Sleeve; 8. Collar; 9. Positioning wheel; 10. Fixing block; 11. Large gear; 12. Small gear; 13. Connecting column; 14. Drive shaft; 15. Limiting plate. Detailed Implementation

[0022] To better understand the purpose, structure, and function of this utility model, the following detailed description is provided in conjunction with the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0023] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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 utility model 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 utility model.

[0024] like Figures 1 to 3 As shown, this utility model provides an ultrasonic testing device for a pile foundation 1, including a positioning component and a fixing plate 4. The fixing plate 4 is fixedly connected to the top surface of the ultrasonic testing instrument 3. The outer periphery of the fixing plate 4 protrudes beyond the outer periphery of the ultrasonic testing instrument 3. The outer periphery of the fixing plate 4 is smaller than the inner diameter of the acoustic logging tube 2. The positioning component includes an integrally formed sleeve 7 and a collar 8. The central axes of the sleeve 7 and the collar 8 coincide with the central axis of the acoustic logging tube 2. The sleeve 7 is inserted tightly into the acoustic logging tube 2. The collar 8 rests on the top of the acoustic logging tube 2. The collar 8 is also provided with a mounting plate, on which a positioning wheel 9 is mounted. The traction connecting line 5 on the ultrasonic testing instrument 3 is guided upward from the inside of the acoustic logging tube 2 through the positioning wheel 9. The positioning wheel 9 has a concave guide arc surface, and its surface tangent is set to coincide with the central axis of the acoustic logging tube 2.

[0025] In the above technical solution, the fixing plate 4 ensures that the ultrasonic detector 3 will not be damaged even if it accidentally hits the inner wall of the acoustic tube 2, thus protecting the ultrasonic detector 3. The outer diameter of the sleeve 7 is exactly equal to the inner diameter of the acoustic tube 2, allowing the sleeve 7 to be stably inserted and fixed to the top of the acoustic tube 2. The length of the sleeve 7 should not be too short to ensure stable support for the collar 8 and its positioning wheel 9. The collar 8 has a mounting plate facing the center of the acoustic tube 2, on which the positioning wheel 9 is fixed. The tangent of its concave guide arc surface coincides with the central axis of the acoustic tube 2, ensuring that the corresponding traction connecting line 5 connected to the ultrasonic detector 3 is led out from the central axis of the acoustic tube 2, avoiding misalignment during lead-out. The lower connection point of the traction connecting line 5 is located at the center of the ultrasonic detector 3 and the fixing plate 4.

[0026] In another technical solution, a guide rod 6 is detachably connected to the lower end of the sleeve 7, and its interior has a channel through which the traction connecting line 5 passes. The guide rod 6 further guides the traction connecting line 5 to be positioned at the central axis of the acoustic tube 2.

[0027] In another technical solution, multiple connecting columns 13 are fixedly connected to multiple collars 8 corresponding to multiple sonic logging tubes 2 of the same pile foundation 1. The multiple connecting columns 13 are all connected to a fixed block 10. A large gear 11 is set at the center of the fixed block 10, which is driven to rotate by a motor. Multiple small gears 12 are meshed on the outer periphery of the large gear 11. The center of the small gear 12 is fixedly sleeved on a drive shaft 14 that is rotatably connected to the fixed block 10. Multiple traction connecting lines 5 corresponding to the multiple sonic logging tubes 2 are wound around the corresponding drive shaft 14. The drive shaft 14 is a winding shaft. Initially, the lengths of the multiple traction connecting lines 5 corresponding to the multiple sonic logging tubes 2 from the ultrasonic detector 3 to the winding shaft are equal. The rotation of the large gear 11 drives the multiple small gears 12 to rotate synchronously, thereby driving the ultrasonic detector 3 to rise or fall synchronously.

[0028] In the above technical solution, multiple sonic logging tubes 2 are generally evenly spaced along the circumference of the pile foundation 1. This application uses three sonic logging tubes 2 as an example for illustration. The fixing block 10 is located at the center of the pile foundation 1, with the centers of the two coinciding. The fixing block 10 is circular, and multiple connecting columns 13 are evenly spaced along the outer circumference of the fixing block 10, respectively connecting to the corresponding collars 8. The center of the large gear 11 coincides with the center of the fixing block 10 and is driven to rotate by a motor located on the fixing block 10. When the large gear 11 rotates, it drives multiple small gears 12 on the outer circumference to rotate synchronously. The small gears 12 are all the same size, and the drive shaft 14 at the center of the small gears 12 is also the same size. The drive shaft 14 is rotatably connected to the fixing block 10 and is vertically arranged. The drive shaft 14 is a winding shaft used to wind the traction connecting line 5. The winding direction is such that when the large gear 11 drives the multiple small gears 12 to rotate synchronously, the multiple traction connecting lines 5 can be raised or lowered synchronously.

[0029] In another technical solution, the fixing block 10 is fixed at the center of the pile foundation 1 by a fixing frame on the ground outside the pile foundation 1. The fixing block 10 is only fixed by multiple collars 8 and connecting columns 13, which may not be secure. Therefore, a fixing rod is extended from the fixing frame on the ground outside the pile foundation 1 to further fix the fixing block 10.

[0030] In another technical solution, the outer periphery of the fixing block 10 is circular and has a concave annular slide. The connecting column 13 is slidably disposed within the annular slide and is detachably connected by bolts. A pulley can be provided at the inner end of the connecting column 13, which is slidably disposed within the annular slide on the outer periphery of the fixing block 10. The outer end is fixedly connected to the collar 8. The connection position of the connecting column 13 on the fixing block 10 can be adjusted according to the specific position of the sonic logging tube 2 to accommodate different locations of the sonic logging tube 2.

[0031] In another technical solution, a limiting plate 15 is provided on the positioning wheel 9, which forms a space between itself and the guide arc surface that does not interfere with the traction connection line 5.

[0032] In another technical solution, a rubber layer is provided around the outer periphery of the fixing plate 4, and its outer diameter is equal to the inner diameter of the acoustic tube 2.

[0033] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model, and other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. An ultrasonic testing apparatus for a pile foundation, characterized by, The device includes a positioning component and a fixing plate. The fixing plate is fixedly connected to the top surface of the ultrasonic detector. The outer periphery of the fixing plate protrudes beyond the outer periphery of the ultrasonic detector. The outer periphery of the fixing plate is smaller than the inner diameter of the acoustic tube. The positioning component includes an integrally formed sleeve and a collar. The central axes of the sleeve and the collar coincide with the central axis of the acoustic tube. The sleeve is inserted tightly into the acoustic tube. The collar rests on the top of the acoustic tube. A mounting plate is also provided on the collar, on which a positioning wheel is mounted. The traction connection line of the ultrasonic detector is guided upward from the inside of the acoustic tube through the positioning wheel. The positioning wheel has a concave guide arc surface, and its surface tangent coincides with the central axis of the acoustic tube.

2. Apparatus for ultrasonic testing of a pile foundation according to claim 1, characterised in that The lower end of the sleeve is also detachably connected to a guide rod, which has a channel through which the traction connecting line passes.

3. The apparatus for ultrasonic testing of pile foundations according to claim 1, characterized in that, Multiple sonic logging tubes corresponding to the same pile foundation have connecting columns fixedly connected to multiple collars. All connecting columns are connected to a fixed block. A large gear is set at the center of the fixed block, which is driven to rotate by a motor. Multiple small gears are meshed around the outer circumference of the large gear. The center of the small gear is fixedly sleeved on a drive shaft that is rotatably connected to the fixed block. Multiple traction connecting lines leading out from the multiple sonic logging tubes are wound around the corresponding drive shafts. The drive shaft is a winding shaft. Initially, the lengths of the multiple traction connecting lines leading out from the multiple sonic logging tubes from the ultrasonic detector to the winding shaft are equal. The rotation of the large gear drives the multiple small gears to rotate synchronously, thereby driving the ultrasonic detector to rise or fall synchronously.

4. Apparatus for ultrasonic testing of a pile according to claim 3, characterised in that, The fixing block is fixed at the center of the pile foundation by a fixing frame on the ground outside the pile foundation.

5. The ultrasonic testing device for pile foundations as described in claim 3, characterized in that, The fixing block has a circular outer periphery and is provided with a concave annular slide. The connecting column is slidably disposed in the annular slide and is detachably connected by bolts.

6. The ultrasonic testing device for pile foundations as described in claim 1, characterized in that, The positioning wheel is provided with a limit plate, which forms a space between itself and the guide arc surface that does not interfere with the traction connection line.

7. The ultrasonic testing device for pile foundations as described in claim 1, characterized in that, A rubber layer is provided around the outer periphery of the fixing plate, and its outer diameter is equal to the inner diameter of the acoustic tube.

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