Accurate step pitch measuring device for ultrasonic detection of foundation cast-in-place pile

Abstract

The invention discloses an accurate step pitch measuring device for ultrasonic detection of a foundation cast-in-place pile, and belongs to the technical field of building detection. The cast-in-place pile body is installed in a foundation, and two sounding pipes are installed in the cast-in-place pile body; the hoisting mechanism is arranged on the rack; and the moving mechanism is arranged on the rack. According to the accurate step pitch measurement device for ultrasonic detection of the foundation cast-in-place pile, through the use of the supporting and positioning mechanism, the measurement precision and reliability are improved, automatic centering and shake prevention are achieved, the problem of measurement errors caused by shake and eccentricity of a probe in a sounding pipe in a traditional method is fundamentally solved, and a driving motor, a synchronous gear ring, a supporting rod and an anti-skid arc block are matched to achieve accurate step pitch measurement. The multiple supporting rods synchronously and radially abut against the inner wall of the sounding pipe at the same speed, the detection installation block is forced to automatically stay in the center of the pipe, swing of the probe in the testing process is restrained, and the stability of an ultrasonic wave propagation path is ensured.

Description

Technical Field

[0001] This invention belongs to the field of building inspection technology, specifically an accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles. Background Technology

[0002] In building construction, bridge construction, and large-scale infrastructure construction, cast-in-place piles are the main form of deep foundations. The reliability of their pile formation quality is directly related to the safety and stability of the overall structure. Ultrasonic transmission method has become the core method for detecting the integrity of cast-in-place piles due to its comprehensive detection range and intuitive and reliable results. This method requires pre-embedding several acoustic tubes in the pile. During the test, the transmitting and receiving transducers are placed in two parallel acoustic tubes respectively. The presence of defects in the pile body is determined by measuring the acoustic parameters of the ultrasonic waves propagating in the pile concrete.

[0003] Currently, the main method for obtaining pipe spacing on-site is to manually measure the distance between the outer walls of two sonic logging pipes at the pipe opening at the top of the pile using a measuring tape, then calculate the inner wall spacing based on the pipe diameter, and use this value as a constant spacing value throughout the entire pile depth range for calculations. However, this method has significant inherent drawbacks:

[0004] 1. Currently, there is no such pipe spacing measuring device. During on-site testing, traditional tape measures are usually used. Due to the influence of tape bending and reading parallax, the error is large and two people are required to work together, stopping and pulling the tape at each point, which is inefficient. The data quality is also prone to errors due to human recording, and the data is scattered.

[0005] 2. During the construction process such as binding and fixing the pile reinforcement cage and concrete pouring and vibration, the sonic logging tube is prone to local bending, tilting or displacement. Therefore, the distance at the top of the pipe cannot represent the inside of the pile body, especially the actual pipe spacing at different depths. Using the single measurement result at the top for the calculation of the whole pile depth introduces a systematic benchmark error.

[0006] 3. At different depths within the pile, the spacing between pipes may change non-linearly due to factors such as construction disturbance and uneven earth pressure. Existing methods cannot obtain this dynamic distance data that varies with depth, leading to inaccurate defect depth location.

[0007] 4. To ensure signal quality, the transducer must be centered in the acoustic tube during testing. Traditional methods often rely on the probe's own centering device or simple spring support, which is unstable and easily affected by rough tube walls, mud adhesion, or probe sway. Probe eccentricity will change the actual propagation path of the ultrasonic wave, introducing additional acoustic time measurement error. Moreover, this error is coupled with the tube spacing error, further reducing the accuracy of the test. Summary of the Invention

[0008] The purpose of this invention is to improve measurement accuracy and reliability through the use of a support and positioning mechanism, achieving automatic centering and anti-swaying, fundamentally solving the measurement error problems caused by probe swaying and eccentricity within the sonic logging tube in traditional methods. The drive motor, synchronous gear ring, support rods, and anti-slip arc blocks work together to ensure that multiple support rods synchronously and at the same speed radially press against the inner wall of the sonic logging tube, forcing the detection mounting block to automatically center itself within the tube, suppressing probe swaying during testing, and ensuring the stability of the ultrasonic wave propagation path. The use of a grating ruler eliminates the indirect method of relying on pre-measurement or theoretical values ​​to calculate the tube distance, achieving real-time, in-situ, and direct accurate measurement of the tube distance. The grating ruler directly measures the extension displacement of the support rods, and the displacement data of two relative support rods are added to obtain the precise net distance between the inner walls of the two tubes at that depth section. Direct measurement significantly improves the accuracy of pile integrity determination. The use of a hoisting mechanism improves detection efficiency and automation, enabling one-time lowering and multi-point automatic measurement, reducing manual intervention, and improving operation speed and consistency. Two independent winches and fixed pulley systems, under the coordination of the control system, enable the two probes to rise and fall synchronously and at the same speed within their respective sonic logging tubes, ensuring that the two probes are always on the same test level. Combined with a depth encoder, the device can automatically pause, support, measure, retract, and lower itself according to a preset step distance, forming an automated measurement cycle. By driving the slider with an adjustment motor, the horizontal position of one probe can be quickly adjusted on the ground, easily adapting to changes in the spacing of sonic logging tubes caused by different pile diameters, without the need to replace or modify the main structure. The use of a protective mechanism prevents mud and debris from entering the detection mounting block and contaminating the transmission mechanism and grating ruler, ensuring the long-term reliable operation of precision components. The overall platform design facilitates rapid installation and positioning on the ground above the foundation, adapting to different construction site environments.

[0009] The technical solution adopted in this invention is as follows: An accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles, comprising:

[0010] A foundation with a platform on top;

[0011] The cast-in-place pile body is installed in the foundation, and two sonic logging tubes are installed inside the cast-in-place pile body.

[0012] The hoisting mechanism is mounted on a platform;

[0013] A moving mechanism is mounted on a platform. The moving mechanism includes a control component, a slide groove, and a slider. The slide groove is located at the top of the platform, and the slider is slidably connected to the slide groove. The control component is mounted on the platform and connected to the slider.

[0014] The testing mechanism consists of two sets, both of which are mounted on a hoisting mechanism and each set is located inside a sonic logging tube. Each set of testing mechanisms includes a testing mounting block and an ultrasonic transmitter and receiver. The testing mounting block is mounted on the hoisting mechanism and the ultrasonic transmitter and receiver is located inside the testing mounting block.

[0015] The support positioning mechanism is provided in two sets. Each set of the support positioning mechanism is located in each detection mounting block. Each set of the support positioning mechanism includes an adjustment component and a support rod. The adjustment component is located in the detection mounting block. There are multiple support rods. The multiple support rods are equidistantly slidably connected in the detection mounting block. The multiple support rods are connected to the adjustment component. One end of each support rod is fixedly connected to an anti-slip arc block.

[0016] The grating ruler is provided in multiple units, and all of the grating rulers are fixedly connected at equal intervals within the detection mounting block, and each grating ruler is connected to each support rod.

[0017] The hoisting mechanism includes:

[0018] The first hoisting component is mounted on the platform and is connected to one of the detection mounting blocks;

[0019] The second lifting component is mounted on the platform and is connected to another testing and mounting block.

[0020] The first hoisting component includes a first winch, a first fixed pulley, and a first steering pulley. The first winch is fixedly connected to the bottom of one side of the outer surface of the platform, the first fixed pulley is rotatably connected to the top side of the platform, and the first steering pulley is installed at the bottom of the slider.

[0021] The second hoisting component includes a second winch, a second fixed pulley, and a second steering pulley. The second winch is fixedly connected to the bottom of one side of the outer surface of the platform, the second fixed pulley is rotatably connected to the top side of the platform, and the second steering pulley is installed at the edge of the top side of the platform.

[0022] The control component includes a positioning motor and a threaded rod. The positioning motor is fixedly connected to the top side of the frame, and the threaded rod is rotatably connected to the slide groove. One end of the threaded rod is fixedly connected to the output end of the positioning motor, and the threaded rod is threadedly connected to the slider.

[0023] The adjusting component includes:

[0024] The power unit is located within the testing and mounting block;

[0025] A synchronization component is located within the detection mounting block. The synchronization component is connected to the power component and also to multiple support rods.

[0026] The power assembly includes a drive motor and a drive gear. The drive motor is fixedly connected inside the detection mounting block, and the drive gear is fixedly connected to the output end of the drive motor.

[0027] The synchronization component includes a synchronization gear ring, a transmission gear, and a driven rack. The synchronization gear ring is rotatably connected to the detection mounting block and meshes with the drive gear. Multiple transmission gears are provided, and each of the multiple transmission gears is rotatably connected to the detection mounting block at equal intervals and meshes with the synchronization gear ring. Multiple driven racks are provided, and each driven rack is fixedly connected to each support rod and meshes with each transmission gear.

[0028] It also includes a protective mechanism, which is provided in two sets. Each set of the protective mechanism is provided on each detection mounting block. Each set of the protective mechanism includes a lifting rod and a protective cover. There are multiple lifting rods, and the multiple lifting rods are fixedly connected to the top of the detection mounting block at equal intervals. The protective cover is movably sleeved on the detection mounting block and is fixedly connected to the output end of the multiple lifting rods.

[0029] A battery is fixedly connected to the detection mounting block near the bottom.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0031] (1) In this invention, the measurement accuracy and reliability are improved by using a support positioning mechanism, and automatic centering and anti-swaying are achieved. This fundamentally solves the measurement error problem caused by the probe shaking and eccentricity inside the acoustic tube in the traditional method. The drive motor, synchronous gear ring, support rod and anti-slip arc block work together to make multiple support rods synchronously and at the same speed radially press against the inner wall of the acoustic tube, forcing the detection mounting block to automatically be in the center of the tube, suppressing the swaying of the probe during the test, and ensuring the stability of the ultrasonic wave propagation path.

[0032] (2) In this invention, by using a grating ruler, the indirect method of relying on pre-measurement or theoretical value to calculate the pipe distance is abandoned, and the pipe distance is realized in real time, in-situ, and directly and accurately measured. The grating ruler directly measures the extension displacement of the support rod. The displacement data of the two support rods are added together to obtain the accurate net distance between the inner walls of the two pipes at this depth section. Direct measurement significantly improves the accuracy of the pile integrity judgment.

[0033] (3) In this invention, the use of the hoisting mechanism improves the detection efficiency and the degree of automation of the operation, realizes one-time lowering and multi-point automatic measurement, reduces manual intervention, and improves the operation speed and consistency. Two independent winches and fixed pulley systems can, under the coordination of the control system, make the two probes rise and fall synchronously and at the same speed in their respective sonic logging tubes, ensuring that the two probes are always at the same test level. Combined with the depth encoder, the device can automatically pause, support, measure, retract, and lower again according to the preset step distance, forming an automated measurement cycle. By driving the slider with the adjustment motor, the horizontal position of one probe can be quickly adjusted on the ground, easily adapting to the changes in the spacing of sonic logging tubes caused by different pile diameters, without the need to replace or modify the main structure.

[0034] (4) In this invention, the use of protective mechanisms prevents mud and debris from entering the interior of the detection mounting block and contaminating the transmission mechanism and grating ruler, ensuring the long-term reliable operation of precision components. The overall bench design facilitates quick installation and positioning on the ground and adapts to different construction site environments. Attached Figure Description

[0035] Figure 1 This is a partial cross-sectional view of the present invention;

[0036] Figure 2 This is a perspective view of the present invention;

[0037] Figure 3 This is an exploded cross-sectional view of the hoisting mechanism of the present invention;

[0038] Figure 4 This is a partial sectional view of the hoisting mechanism of the present invention;

[0039] Figure 5 This is an exploded cross-sectional view of the testing mechanism of the present invention;

[0040] Figure 6 This is a partial cross-sectional view of the detection mechanism of the present invention;

[0041] Figure 7 This is an exploded view of the testing mechanism of the present invention;

[0042] Figure 8 This is a perspective view of the testing mechanism of the present invention;

[0043] Figure 9 This is an exploded view of the support and positioning mechanism of the present invention.

[0044] The markings in the diagram are: 1. Foundation; 2. Cast-in-place pile; 3. Sonic logging tube; 4. First winch; 5. Second winch; 6. First fixed pulley; 7. Second fixed pulley; 8. Adjustment motor; 9. Threaded rod; 10. Sliding block; 11. First steering pulley; 12. Slide groove; 13. Platform; 14. Second steering pulley; 15. Protective cover; 16. Detection mounting block; 17. Support rod; 18. Lifting rod; 19. Ultrasonic transmitter and receiver; 20. Battery; 21. Transmission gear; 22. Synchronous gear ring; 23. Drive motor; 24. Drive gear; 25. Grating ruler; 26. Anti-slip arc block; 27. Driven rack. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] Example 1, refer to Figure 1-9 An accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles, comprising:

[0047] A foundation 1 with a platform 13 on top;

[0048] The cast-in-place pile 2 is installed in the foundation 1, and two sonic logging tubes 3 are installed inside the cast-in-place pile 2.

[0049] The hoisting mechanism is located on the platform 13;

[0050] The moving mechanism is mounted on the platform 13. The moving mechanism includes a control component, a slide 12 and a slider 10. The slide 12 is opened at the top of the platform 13. The slider 10 is slidably connected in the slide 12. The control component is mounted on the platform 13 and is connected to the slider 10.

[0051] The testing mechanism consists of two sets, both of which are mounted on the hoisting mechanism. Each set of testing mechanisms is located within each acoustic tube 3. Each set of testing mechanisms includes a testing mounting block 16 and an ultrasonic transmitter and receiver 19. The testing mounting block 16 is mounted on the hoisting mechanism, and the ultrasonic transmitter and receiver 19 is located within the testing mounting block 16.

[0052] The support positioning mechanism is provided in two sets. Each set of support positioning mechanism is located in each detection mounting block 16. Each set of support positioning mechanism includes an adjustment component and a support rod 17. The adjustment component is located in the detection mounting block 16. There are multiple support rods 17. Multiple support rods 17 are equidistantly slidably connected in the detection mounting block 16. Multiple support rods 17 are connected to the adjustment component. One end of each support rod 17 is fixedly connected to an anti-slip arc block 26.

[0053] Multiple grating rulers 25 are provided, and all grating rulers 25 are fixedly connected at equal intervals within the detection mounting block 16, and each grating ruler 25 is connected to each support rod 17.

[0054] In this implementation scheme: the hoisting mechanism and the moving mechanism belong to the surface unit, while the detection mechanism, the support and positioning mechanism, and the grating ruler 25 belong to the downhole unit. The surface unit receives data from the sensors in the downhole unit via a microcontroller or micro PLC, controls the actions of the downhole unit, and communicates with the host computer. It can display real-time depth and pipe spacing, set measurement parameters, start / stop measurement, store and view data. The surface unit also includes a data storage and transmission device for storing measurement data (H, D), and a USB interface or Bluetooth / Wi-Fi module for easy data export to a computer. The platform 13 supports and suspends the entire device. The distance between the two sets of detection mechanisms is adjusted by the movement of the slider 10 within the slide groove 12, allowing for different distances between the two sonic logging pipes 3. To improve usability, the ultrasonic transmitter and receiver 19 measures the depth of the device in real time as the detection mounting block 16 rises and falls. The model of the ultrasonic transmitter and receiver 19 can be selected from those available on the market, which will not be elaborated here. The support rod 17 extends and retracts synchronously. The anti-slip arc block 26 adopts a V-shaped or arc-shaped design and is wrapped with wear-resistant rubber to ensure that it can be tightly and stably locked on the inner wall of the acoustic tube 3, automatically aligning and reducing errors caused by probe shaking. The grating ruler 25 is a high-precision linear displacement sensor that is linked with the support rod 17 to measure the extension and retraction distance of the corresponding support rod 17 in real time. The sum of the distances of the two opposite support rods 17 is the distance between the inner walls of the two acoustic tubes 3. The model of the grating ruler 25 can be selected from those available on the market, which will not be elaborated here.

[0055] Specifically: The hoisting mechanism includes:

[0056] The first hoisting component is mounted on the platform 13 and is connected to one of the detection mounting blocks 16;

[0057] The second hoisting component is mounted on the platform 13 and is connected to another testing and mounting block 16.

[0058] In this embodiment, the first hoisting component and the second hoisting component cooperate with each other to realize the lifting control of the two sets of detection mechanisms.

[0059] Specifically: The first hoisting component includes a first winch 4, a first fixed pulley 6 and a first steering pulley 11. The first winch 4 is fixedly connected to the bottom of one side of the outer surface of the platform 13. The first fixed pulley 6 is rotatably connected to the top side of the platform 13. The first steering pulley 11 is installed at the bottom of the slider 10.

[0060] In this embodiment: the model of the first winch 4 can be selected from those available on the market as needed, which will not be elaborated here. The wire rope on the first winch 4 is connected to one of the detection mounting blocks 16 in sequence through the first fixed pulley 6 and the first steering pulley 11. The height adjustment of the detection mounting block 16 in the corresponding sonic logging tube 3 is controlled. The first winch 4, the first fixed pulley 6 and the first steering pulley 11 cooperate with each other to complete the lifting and lowering of the underground unit. It is best to have a constant speed control function to ensure the continuous transmission of power and signal during the cable winding process.

[0061] Specifically: The second hoisting component includes a second winch 5, a second fixed pulley 7, and a second steering pulley 14. The second winch 5 is fixedly connected to the bottom of one side of the outer surface of the platform 13. The second fixed pulley 7 is rotatably connected to the top side of the platform 13. The second steering pulley 14 is installed at the edge of the top side of the platform 13.

[0062] In this embodiment: the model of the second winch 5 can be selected from those available on the market as needed, which will not be elaborated here. The wire rope on the second winch 5 is connected to one of the detection mounting blocks 16 in sequence through the second fixed pulley 7 and the second steering pulley 14. The height adjustment of the detection mounting block 16 in the corresponding sonic logging tube 3 is controlled. The second winch 5, the second fixed pulley 7 and the second steering pulley 14 cooperate with each other to complete the lifting and lowering of the underground unit. It is best to have a constant speed control function to ensure the continuous transmission of power and signal during the cable winding process.

[0063] Specifically: The control components include a positioning motor 8 and a threaded rod 9. The positioning motor 8 is fixedly connected to the top side of the frame 13, and the threaded rod 9 is rotatably connected to the slide groove 12. One end of the threaded rod 9 is fixedly connected to the output end of the positioning motor 8, and the threaded rod 9 is threadedly connected to the slider 10.

[0064] In this embodiment, the model of the adjustment motor 8 can be selected from those available on the market as needed, which will not be elaborated here. The adjustment motor 8 controls the threaded rod 9 to rotate, so that the adjustment slider 10 adjusts the position of the first steering pulley 11, thereby realizing the relative distance between the two detection mounting blocks 16 and adapting to different distances between the two acoustic tubes 3.

[0065] Specifically: The adjustment components include:

[0066] The power unit is located within the detection mounting block 16;

[0067] The synchronization component is located within the detection mounting block 16. The synchronization component is connected to the power component and to multiple support rods 17.

[0068] In this embodiment, the power component enables multiple support rods 17 to extend and retract synchronously through the synchronization component, thereby completing the support and positioning of the detection mounting block 16 inside the acoustic tube 3.

[0069] Specifically: The power assembly includes a drive motor 23 and a drive gear 24. The drive motor 23 is fixedly connected inside the detection mounting block 16, and the drive gear 24 is fixedly connected to the output end of the drive motor 23.

[0070] In this embodiment, the model of the drive motor 23 can be selected from those available on the market as needed, which will not be elaborated here. The drive motor 23 outputs power through the drive gear 24.

[0071] Specifically: The synchronization assembly includes a synchronization gear ring 22, a transmission gear 21, and a driven rack 27. The synchronization gear ring 22 is rotatably connected to the detection mounting block 16, and the synchronization gear ring 22 meshes with the drive gear 24. There are multiple transmission gears 21, which are equidistantly rotatably connected to the detection mounting block 16, and all of the multiple transmission gears 21 mesh with the synchronization gear ring 22. There are multiple driven racks 27, each of which is fixedly connected to each support rod 17, and each driven rack 27 meshes with each transmission gear 21.

[0072] In this embodiment, multiple transmission gears 21 are of the same size. The synchronous gear ring 22 enables the multiple transmission gears 21 to rotate synchronously and transmits power to the driven rack 27, thereby enabling the multiple support rods 17 to extend and retract synchronously.

[0073] Specifically, it also includes a protective mechanism, which is provided in two sets. Each set of protective mechanisms is provided on each detection mounting block 16. Each set of protective mechanisms includes a lifting rod 18 and a protective cover 15. There are multiple lifting rods 18, and multiple lifting rods 18 are fixedly connected to the top of the detection mounting block 16 at equal intervals. The protective cover 15 is movably sleeved on the detection mounting block 16 and is fixedly connected to the output end of multiple lifting rods 18.

[0074] In this embodiment, the model of the lifting rod 18 can be selected from those available on the market as needed, which will not be elaborated here. The height of the protective cover 15 is adjusted by controlling the lifting rod 18 to protect the telescopic openings of the multiple support rods 17 and prevent internal contamination.

[0075] Specifically: A battery 20 is fixedly connected inside the mounting block 16 near the bottom.

[0076] In this embodiment, battery 20 provides power to ultrasonic transmitter and receiver 19, grating ruler 25 and drive motor 23 to ensure the effectiveness of use.

[0077] During use, confirm the positions of the two sonic logging tubes 3, clear away any debris around the tube openings to ensure there are no obstructions, and securely erect the device frame 13 above the foundation 1, ensuring the frame 13 is level and stable. Simultaneously, position the detection mounting blocks 16 on the second steering pulley 14 directly above the sonic logging tubes 3, relatively away from the frame 13. Reliably connect the two detection mounting blocks 16 to the first winch 4 and the second winch 5 respectively via wire ropes. Start the adjustment motor 8, driving the threaded rod 9 to rotate, causing the slider 10 and the first steering pulley 11 to move horizontally within the groove 12, thereby adjusting the horizontal position of the first detection mechanism so that the initial distance between the two detection mounting blocks 16 is approximately equal to the distance between the two sonic logging tubes 3. In this alignment, the first winch 4 and the second winch 5 lower the two detection mounting blocks 16 directly above the openings of the corresponding sonic logging pipes 3, keeping them suspended. They then synchronously lower the two detection mounting blocks 16 at the same low speed, ensuring they smoothly enter their respective sonic logging pipes 3. When the detection mounting blocks 16 reach the first predetermined measurement depth, the lowering is paused. The lifting rod 18 controls the protective cover 15 to rise, opening outlet 17. The drive motors 23 inside the two detection mounting blocks 16 are then activated. The drive motors 23 drive the drive gears 24 to rotate, which in turn drives the synchronous gear ring 22 to rotate. The synchronous gear ring 22 drives multiple circumferentially distributed transmission gears 21 to rotate synchronously, thereby driving multiple actuators meshing with the transmission gears 21. The moving rack 27 and its fixed support rod 17 extend radially synchronously and at the same speed. The anti-slip arc block 26 at the front end of the support rod 17 presses tightly against the inner wall of the acoustic tube 3, achieving automatic centering and firm support of the detection mounting block 16 inside the tube, effectively suppressing probe shaking. Simultaneously with the extension and fixation of the support rod 17, the linked grating ruler 25 measures the extension displacement of each support rod in real time and accurately. The data processing system automatically reads the displacement data of the grating ruler 25 corresponding to the two relatively arranged support rods 17 and adds them together. This allows for real-time and direct calculation of the precise net distance between the inner walls of the two acoustic tubes 3 at that depth section, serving as a key parameter for ultrasonic wave velocity calculation and judgment. With the probe fixed in place, the ultrasonic transmitter and receiver 19 is activated, with one probe acting as the transmitter and the other as the receiver. It transmits and receives ultrasonic signals passing through the grouting pile 2, and simultaneously records parameters such as the current measurement depth, sound time, amplitude, and frequency. Combined with the just measured precise pipe distance, the sound velocity is calculated and the integrity of the pile body is analyzed. After completing the measurement of one depth, the drive motor 23 is controlled to reverse, causing all support rods 17 to retract synchronously and detach from the pipe wall. The controller stores the current depth H and distance D as a data point on the SD card. The two winches are then operated synchronously again to move the two detection mounting blocks 16 downwards to the next predetermined measurement depth until the device is lifted to the wellhead, and the measurement ends.

[0078] The control method of this invention is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this invention is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles, characterized in that, include: A foundation (1) with a platform (13) on top; The cast-in-place pile body (2) is installed in the foundation (1), and two sonic logging tubes (3) are installed inside the cast-in-place pile body (2). The hoisting mechanism is located on the platform (13); The moving mechanism is located on the platform (13). The moving mechanism includes a control component, a slide groove (12) and a slider (10). The slide groove (12) is opened at the top of the platform (13). The slider (10) is slidably connected in the slide groove (12). The control component is located on the platform (13) and is connected to the slider (10). The testing mechanism is provided in two groups. Both groups of testing mechanisms are located on the hoisting mechanism, and each group of testing mechanisms is located in each acoustic tube (3). Each group of testing mechanisms includes a testing mounting block (16) and an ultrasonic transmitter and receiver (19). The testing mounting block (16) is located on the hoisting mechanism, and the ultrasonic transmitter and receiver (19) is located in the testing mounting block (16). The support positioning mechanism is provided in two sets. Each set of the support positioning mechanism is located in each detection mounting block (16). Each set of the support positioning mechanism includes an adjustment component and a support rod (17). The adjustment component is located in the detection mounting block (16). There are multiple support rods (17). The multiple support rods (17) are equidistantly slidably connected in the detection mounting block (16). The multiple support rods (17) are connected to the adjustment component. One end of each support rod (17) is fixedly connected to an anti-slip arc block (26). A plurality of grating rulers (25) are provided, and the plurality of grating rulers (25) are fixedly connected at equal intervals within the detection mounting block (16), and each grating ruler (25) is connected to each support rod (17).

2. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: The hoisting mechanism includes: The first hoisting component is mounted on the platform (13) and is connected to one of the detection mounting blocks (16); The second hoisting component is mounted on the platform (13) and is connected to another testing mounting block (16).

3. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: The first hoisting component includes a first winch (4), a first fixed pulley (6) and a first steering pulley (11). The first winch (4) is fixedly connected to the bottom of one side of the outer surface of the platform (13). The first fixed pulley (6) is rotatably connected to the top side of the platform (13). The first steering pulley (11) is installed at the bottom of the slider (10).

4. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: The second hoisting component includes a second winch (5), a second fixed pulley (7), and a second steering pulley (14). The second winch (5) is fixedly connected to the bottom of one side of the outer surface of the platform (13). The second fixed pulley (7) is rotatably connected to the top side of the platform (13). The second steering pulley (14) is installed at the edge of the top side of the platform (13).

5. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: The control component includes a positioning motor (8) and a threaded rod (9). The positioning motor (8) is fixedly connected to the top side of the frame (13). The threaded rod (9) is rotatably connected to the slide groove (12). One end of the threaded rod (9) is fixedly connected to the output end of the positioning motor (8), and the threaded rod (9) is threadedly connected to the slider (10).

6. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: The adjustment component includes: The power assembly is located within the detection mounting block (16); A synchronization component is located within the detection mounting block (16), the synchronization component is connected to the power component, and the synchronization component is connected to multiple support rods (17).

7. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: The power assembly includes a drive motor (23) and a drive gear (24). The drive motor (23) is fixedly connected inside the detection mounting block (16), and the drive gear (24) is fixedly connected to the output end of the drive motor (23).

8. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: The synchronization component includes a synchronization ring (22), a transmission gear (21), and a driven rack (27). The synchronization ring (22) is rotatably connected to the detection mounting block (16), and the synchronization ring (22) meshes with the drive gear (24). There are multiple transmission gears (21), and all of the multiple transmission gears (21) are rotatably connected to the detection mounting block (16) at equal intervals. All of the multiple transmission gears (21) mesh with the synchronization ring (22). There are multiple driven racks (27), and each driven rack (27) is fixedly connected to each support rod (17). Each driven rack (27) meshes with each transmission gear (21).

9. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: It also includes a protective mechanism, which is provided in two sets. Each set of the protective mechanism is provided on each detection mounting block (16). Each set of the protective mechanism includes a lifting rod (18) and a protective cover (15). There are multiple lifting rods (18). Multiple lifting rods (18) are fixedly connected to the top of the detection mounting block (16) at equal intervals. The protective cover (15) is movably sleeved on the detection mounting block (16) and is fixedly connected to the output end of multiple lifting rods (18).

10. The accurate measuring step distance device for ultrasonic testing of foundation cast-in-place piles as described in claim 1, characterized in that: A battery (20) is fixedly connected to the bottom of the detection mounting block (16).

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