Device for calibrating system delay of foundation pile cross-hole sound wave transmission detection equipment

Abstract

The utility model discloses a device for calibrating system delay of foundation pile cross-hole sound wave transmission detection equipment, which comprises a transparent water tank and a caliper arranged on the water tank, telescopic caliper fixing pieces are arranged on two opposite sides of the water tank, the caliper fixing pieces and the top of the water tank are clamped and fixed, and the caliper fixing pieces are arranged on the water tank. The telescopic caliper clamping pieces are installed on one sides of the caliper fixing pieces in a limiting mode, the caliper clamping pieces are in clamping fit with the same caliper, a plurality of positioning pieces capable of being braked are installed on the caliper in a sliding mode, transducer clamping pieces used for fixing transducers are detachably and fixedly installed on the positioning pieces, and the transducer can be directly installed on a water tank; and the caliper is suitable for water tanks with various sizes, has strong applicability and further ensures the installation stability of the caliper.

Description

Technical Field

[0001] This utility model relates to the field of experimental technology related to the integrity of foundation piles, and in particular to a device for calibrating the delay of a cross-hole acoustic transmission detection equipment system for foundation piles. Background Technology

[0002] After the completion of bored pile construction, the integrity of the pile body needs to be tested. Currently, the main methods for testing pile integrity include: sonic logging, low-strain method, core sampling, and high-strain method. Sonic logging is the most intuitive and reliable method for testing pile integrity, and it is currently the primary means of pile integrity testing.

[0003] System delay is an inherent characteristic of the acoustic transmission method. The correct calibration of system delay has a significant impact on the accuracy of acoustic time and velocity in the acoustic detection of foundation piles, and sound velocity is one of the main indicators for determining the integrity of the foundation pile.

[0004] Currently, most standards only describe the method and formula for calibration, without specifying the calibration device and calibration details. Therefore, in actual operation, it has been found that using water tanks of different sizes or materials, or even slight deviations in the way the transducer is clamped, can lead to large data discrepancies, resulting in the failure of the time-distance curve. This, in turn, affects the accuracy of the acoustic transmission method for on-site pile foundation testing, posing potential risks to the project.

[0005] Existing testing equipment, such as the "Delay Calibration Device for Pile Foundation Acoustic Wave System" with patent number ZL202222539294.8, can be used to calibrate the delay of the cross-hole acoustic wave transmission testing equipment system for foundation piles, but it still has the following problems:

[0006] 1. Water tanks are usually made of transparent materials, such as acrylic or glass, for easy observation. In order to ensure the stability of the water tank and avoid damaging its structure, it is difficult to fix the caliper's clamping structure by drilling holes or screws.

[0007] 2. Some existing caliper clamping structures are directly sleeved on the side of the sink, which has poor applicability and can only be used for sinks with fixed wall thickness.

[0008] 3. The device is not easy to disassemble and install, and it is difficult to completely disassemble it after the experiment is completed. Utility Model Content

[0009] This invention provides a device for calibrating the time delay of a cross-hole acoustic transmission testing equipment system for foundation piles, aiming to solve the problems mentioned above, such as its unsuitability for direct fixing of calipers, poor applicability, and difficulty in complete disassembly after the experiment.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0011] A device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles includes a transparent water tank and calipers mounted on the water tank. Retractable caliper fixing members are provided on opposite sides of the water tank, clamping the caliper fixing members to the top of the water tank. A retractable caliper clamping member is installed on one side of each caliper fixing member, and each clamping member clamps the same caliper. Several brakeable positioning members are slidably mounted on the caliper, and each positioning member is detachably fixed with a transducer clamping member for fixing the transducer.

[0012] Preferably, the caliper fixing member is symmetrical about the middle position of the water tank, and the caliper is horizontal and parallel to the longest side of the water tank.

[0013] More preferably, the caliper fixing part includes an inverted L-shaped fixing part, and a first clamping plate is slidably installed on the top of the fixing part through a slide rod. The first clamping plate and the fixing part form a "door" shaped groove and are fitted onto the top of the water tank. A first threaded rod is provided on the top of the fixing part, and a first nut is threaded onto the first threaded rod. The first clamping plate is clamped to the fixing part on both sides of the top of the water tank through the first nut.

[0014] Furthermore, there are two sliding rods, which are parallel and symmetrical about the middle position of the top horizontal end of the fixed part, and both sliding rods are parallel to the top of the fixed part. Both sliding rods pass through the first clamping plate to form a limiting sliding.

[0015] Furthermore, the first threaded rod is located in the middle between the two sliding rods, and the sliding rods are symmetrical about the first threaded rod. The first threaded rod is parallel to the sliding rod, and the first nut is threaded onto the first threaded rod located on the side of the first clamping plate away from the fixed part.

[0016] Specifically, a limiting groove is provided on the side of the fixing part adjacent to the slide rod.

[0017] More specifically, each caliper clamping component includes an L-shaped mounting block. The vertical end of the L-shaped mounting block has a limiting block that matches the limiting groove. The limiting block is embedded in the limiting groove to form a limiting installation. The horizontal end of the L-shaped mounting block is supported on the top of the water tank. The horizontal end of the L-shaped mounting block has a raised slide rail. The bottom of the second clamping plate forms a limiting sliding with the corresponding raised slide rail through a slide groove. The vertical end of the L-shaped mounting block has a second screw parallel to the raised slide rail. The second screw passes through the second clamping plate and is threaded with a second nut. The bottom of the caliper is supported on the raised slide rail, and the second clamping plate is clamped on both sides of the caliper by the second nut and the vertical end of the L-shaped mounting block.

[0018] Preferably, the positioning component includes a sliding ring that is slidably mounted on the caliper, a positioning screw is threaded on the back side of the sliding ring, and the sliding ring is pressed and fixed to the caliper by the positioning screw. The front side of the sliding ring is provided with a positioning groove, and the positioning groove is provided with a threaded hole.

[0019] More preferably, the transducer clamping member includes a vertical part, which is limited and installed in the positioning groove and is fixedly engaged with the positioning groove by fastening screws. The bottom of the vertical part is provided with a clamping and mounting part for fixing the transducer.

[0020] Preferably, the top and bottom of the water tank are both provided with rubber rings concentrically and coaxially, and the caliper fixing piece is clamped on the rubber ring at the top.

[0021] The beneficial effects of this utility model are:

[0022] Using the recognition results of the first and second recognition cameras as the trigger points for control, the entire process can be automated through the processing module and each module, ensuring the accuracy of the operation in the experiment. In particular, the color halo observation is automatically calculated through recognition, which facilitates the control of subsequent related steps, further improving accuracy and reducing errors caused by human operation and visual observation.

[0023] The cleaning module is used to rinse the dip end after each drop. When there is no signal, the dip end is drained in the cleaning module to ensure the stability of each subsequent dip and avoid the impact of the previous residue on the observation of the color halo, thus ensuring the accuracy and success rate of the experiment.

[0024] The filter paper is fixed by a filter paper fixing module, and the blank position is identified by a second recognition camera and the drop position is selected by a processing module. This makes full use of the filter paper and ensures the stability of the filter paper during the dropping process, thus ensuring the accuracy and success rate of the experiment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall installation of this utility model;

[0026] Figure 2 This is an enlarged schematic diagram of the caliper fixing part of this utility model;

[0027] Figure 3 This is a disassembly diagram of the caliper clamping part of this utility model;

[0028] Figure 4 This is an enlarged schematic diagram of the front side of the positioning component of this utility model;

[0029] Figure 5 This is an enlarged schematic diagram of the rear side of the positioning component of this utility model;

[0030] In the diagram: 1. Caliper fixing component; 101. Fixing part; 102. First clamping plate; 103. Sliding rod; 104. First threaded rod; 105. First nut; 106. Limiting groove;

[0031] 2. Caliper clamping component; 201. L-shaped mounting block; 202. Limiting block; 203. Raised slide rail; 204. Second clamping plate; 205. Slide groove; 206. Second screw; 207. Second nut;

[0032] 3. Calipers;

[0033] 4. Positioning components; 401. Sliding ring; 402. Positioning screw; 403. Positioning groove;

[0034] 5. Transducer clamping component; 501. Vertical part; 502. Clamping and mounting part; 503. Fastening screw;

[0035] 6. Water tank; 7. Rubber ring. Detailed Implementation

[0036] The embodiments will be further described below with reference to the accompanying drawings.

[0037] like Figures 1-5 As shown in the preferred embodiment 1, a device for calibrating the delay of a cross-hole acoustic transmission detection equipment system for foundation piles includes a transparent water tank 6 and a caliper 3 mounted on the water tank 6. Retractable caliper fixing members 1 are provided on opposite sides of the water tank 6, forming a clamping fixation with the top of the water tank 6. A retractable caliper clamping member 2 is installed on one side of each caliper fixing member 1, and each caliper clamping member 2 forms a clamping engagement with the same caliper 3. Several brakeable positioning members 4 are slidably mounted on the caliper 3, and each positioning member 4 is detachably fixed with a transducer clamping member 5 for fixing the transducer.

[0038] The caliper fixing part 1 is used to clamp the top of the water tank 6 and install the caliper clamping part 2. The caliper clamping part 2 can extend and change its diameter to adapt to water tanks with various wall thicknesses. The caliper clamping part 2 can also change its diameter to adapt to calipers of various sizes. Finally, the caliper 3 is clamped and fixed. The transducer clamping part 5 is arranged by the positioning part 4 on the caliper 3, so that the transducer is installed at a certain position on the caliper 3 for time delay calibration experiments.

[0039] In practical use, the caliper fixing part 1 can be installed in the approximate position first, but not fully tightened. Then, the caliper clamping part 2 is installed on the caliper fixing part 1 to limit its position. Finally, the caliper 3 with the positioning part 4 is installed. The position of the caliper fixing part 1 is finely adjusted by the position of the caliper 3 to ensure that the caliper 3 is horizontally arranged. Then, the caliper fixing part 1 and the caliper clamping part 2 are tightened to complete the fixation of the device foundation. Then, the positioning part 4 is moved to the set position on the caliper 3 according to the experimental requirements. The transducer is installed through the transducer clamping part 5, and the signal is transmitted to the computer for delay calibration experiment.

[0040] As a preferred embodiment 2, the caliper fixing member 1 is symmetrical about the middle position of the water tank 6, and the caliper 3 is horizontal and parallel to the longest side of the water tank 6, which makes it easy for the caliper 3 to correspond with the water tank 6 and convenient to use.

[0041] As a preferred embodiment 3, the specific structure of the caliper fixing member 1 is as follows: The caliper fixing member 1 includes an inverted L-shaped fixing part 101. The top of the fixing part 101 is slidably mounted with a first clamping plate 102 via a slide rod 103. The first clamping plate 102 and the fixing part 101 form a "door" shaped groove and are fitted onto the top of the water tank 6. The top of the fixing part 101 is provided with a first threaded rod 104. A first nut 105 is threaded onto the first threaded rod 104. The first clamping plate 102 is clamped to the fixing part 101 on both sides of the top of the water tank 6 by the first nut 105.

[0042] The distance between the clamping plate 102 and the fixing part 101 can be changed by the position of the first nut 105 on the first threaded rod 104, thereby changing the diameter of the "door" shaped groove, which can adapt to water tanks 6 with different wall thicknesses. After further tightening the first nut 105, it is clamped on the top of the water tank 6 to complete the fixation. The slide rod 103 is used for limiting the sliding of the first clamping plate 102 to ensure the sliding direction and sliding stability.

[0043] There are two sliding rods 103, which are parallel and symmetrical about the middle of the top horizontal end of the fixing part 101. Both sliding rods 103 are parallel to the top of the fixing part 101 and pass through the first clamping plate 102 to form a limiting sliding. This ensures the limiting sliding, and the sliding direction is just right to clamp the water tank 6. At the same time, during installation, the part that supports the top of the water tank 6 is always the fixing part 101, and the sliding rods 103 are always above the top of the water tank 6, so that the sliding and installation do not interfere with each other.

[0044] The first threaded rod 104 is located at the midpoint between the two sliding rods 103, and the sliding rods 103 are symmetrical about the first threaded rod 104. The first threaded rod 104 is parallel to the sliding rods 103. The first nut 105 is threaded onto the first threaded rod 104 located on the side of the first clamping plate 102 away from the fixing part 101. The clamping is achieved by the position of the first nut 105, and the clamping, sliding, and installation do not interfere with each other.

[0045] A limiting groove 106 is provided on the side of the fixing part 101 adjacent to the slide rod 103. This is used to stably install the caliper clamp 2.

[0046] As a preferred embodiment 4, the limiting groove 106 is a vertically arranged limiting groove with a T-shaped cross-section, and the limiting block 202 is a vertically arranged limiting block with a T-shaped cross-section. The limiting block 202 is completely fitted with the limiting groove 106 and can be installed vertically so that the limiting block 202 is fitted into the limiting groove 106 to form a limiting fit, thereby completing the limiting installation of the caliper clamp 2 on the top of the water tank 6.

[0047] Preferably, the limiting block 202 can be further tightened using a clamping screw to ensure the stability of the limiting block within the limiting groove 106, and can be used as needed for experiments.

[0048] As a preferred embodiment 5, each of the caliper clamping components 2 includes an L-shaped mounting block 201. The vertical end of the L-shaped mounting block 201 is provided with a limiting block 202 that matches the limiting groove 106. The limiting block 202 is embedded in the limiting groove 106 to form a limiting installation. The horizontal end of the L-shaped mounting block 201 is supported on the top of the water tank 6. The horizontal end of the L-shaped mounting block 201 is provided with a raised slide rail 203. The bottom of the second clamping plate 204 forms a limiting sliding with the corresponding raised slide rail 203 through the slide groove 205. The vertical end of the L-shaped mounting block 201 is provided with a second screw 206 parallel to the raised slide rail 203. The second screw 206 passes through the second clamping plate 204 and is threaded with a second nut 207. The bottom of the caliper 3 is supported on the raised slide rail 203, and the second clamping plate 204 is clamped on both sides of the caliper 3 by the second nut 207 and the vertical end of the L-shaped mounting block 201.

[0049] Preferably, there are two raised slide rails 203, and both raised slide rails 203 are arranged along the horizontal extension direction of the L-shaped mounting block 201. The horizontal extension direction of the L-shaped mounting block 201 is parallel to the side of the water tank 6, ensuring the installation position of the caliper 3. The two raised slide rails 203 are symmetrically arranged about the middle position of the horizontal end of the L-shaped mounting block 201, and a groove is formed between the two raised slide rails 203. The second screw 206 is arranged in the groove.

[0050] In use, place the caliper 3 between the second clamping plate 204 and the vertical end of the L-shaped mounting block 201, and press one side of the caliper 3 against the vertical end of the L-shaped mounting block 201. The bottom of the caliper 3 is supported on the raised slide rail 203. Tighten the second nut 207 so that the second clamping plate 204 slides along the raised slide rail 203 through the slide groove 205, and finally clamps the caliper 3 to complete the fixation.

[0051] As a preferred embodiment 6, the positioning component 4 includes a sliding ring 401 that is slidably mounted on the caliper 3. A positioning screw 402 is threaded on the back side of the sliding ring 401, and the sliding ring 401 is pressed and fixed to the caliper 3 by the positioning screw 402. A positioning groove 403 is provided on the front side of the sliding ring 401, and a threaded hole is provided in the positioning groove 403.

[0052] In use, the sliding ring 401 is moved to the set position, and the caliper 3 is clamped between the end of the positioning screw 402 and the inner wall of the sliding ring 401 by the positioning screw 402 to fix the sliding ring 401. The transducer clamp 5 is installed in the positioning groove 403.

[0053] As a preferred embodiment 7, the transducer clamping member 5 includes a vertical part 501, which is limited and installed in the positioning groove 403 and forms a fixed engagement with the positioning groove 403 by fastening screws 503. The bottom of the vertical part 501 is provided with a clamping and mounting part 502 for fixing the transducer.

[0054] In use, the vertical part 501 is first fixed to the threaded hole in the positioning groove 403 by fastening screw 503, and then the transceiver is installed in the clamping and mounting part 502. The clamping and mounting part 502 uses the existing transceiver mounting base.

[0055] In a preferred embodiment 8, rubber rings 7 are concentrically and coaxially provided at the top and bottom of the water tank 6, and the caliper fixing member 1 is clamped on the top rubber ring 7. This can protect the sides of the transparent material water tank 6 and prevent breakage or damage caused by excessive pressure, while the rubber ring 7 can also act as a sealing gasket to improve installation stability.

[0056] As a preferred embodiment 9, the water tank 6 is filled with clean water, and a pair of transducers are clamped in the clamping devices on both sides, ensuring that the transducers are clamped vertically downwards. The transducers are fixed in sequence at distances of 100mm, 200mm, 300mm, and 400mm, and the equipment system delay is calibrated at these distances. A time-distance curve can be plotted to calibrate the accurate delay of the equipment system.

[0057] The working principle of this utility model:

[0058] The caliper fixing part 1 is used to clamp the top of the water tank 6 and install the caliper clamping part 2. The caliper clamping part 2 can extend and change its diameter to adapt to water tanks with various wall thicknesses. The caliper clamping part 2 can also change its diameter to adapt to calipers of various sizes. Finally, the caliper 3 is clamped and fixed. The transducer clamping part 5 is arranged by the positioning part 4 on the caliper 3, so that the transducer is installed at a certain position on the caliper 3 for time delay calibration experiments.

[0059] In practical use, the caliper fixing part 1 can be installed in the approximate position first, but not fully tightened. Then, the caliper clamping part 2 is installed on the caliper fixing part 1 to limit its position. Finally, the caliper 3 with the positioning part 4 is installed. The position of the caliper fixing part 1 is finely adjusted by the position of the caliper 3 to ensure that the caliper 3 is horizontally arranged. Then, the caliper fixing part 1 and the caliper clamping part 2 are tightened to complete the fixation of the device foundation. Then, the positioning part 4 is moved to the set position on the caliper 3 according to the experimental requirements. The transducer is installed through the transducer clamping part 5, and the signal is transmitted to the computer for delay calibration experiment.

Claims

1. A device for calibrating the time delay of a cross-hole acoustic transmission testing equipment system for foundation piles, comprising a transparent water tank (6) and calipers (3) mounted on the water tank (6), characterized in that, The water tank (6) is provided with retractable caliper fixing parts (1) on both sides. The caliper fixing parts (1) are clamped and fixed to the top of the water tank (6). One side of the caliper fixing parts (1) is limited and installed with retractable caliper clamping parts (2). The caliper clamping parts (2) are clamped and engaged with the same caliper (3). Several brakeable positioning parts (4) are slidably installed on the caliper (3). The positioning parts (4) are detachably fixed with transducer clamping parts (5) for fixing the transducer.

2. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 1, characterized in that, The caliper fastener (1) is symmetrical about the middle position of the water tank (6), and the caliper (3) is horizontal and parallel to the longest side of the water tank (6).

3. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 2, characterized in that, The caliper fixing component (1) includes an inverted L-shaped fixing part (101). The top of the fixing part (101) is slidably mounted with a first clamping plate (102) via a slide rod (103). The first clamping plate (102) and the fixing part (101) form a "door" shaped groove that fits onto the top of the water tank (6). The top of the fixing part (101) is provided with a first threaded rod (104). A first nut (105) is threaded onto the first threaded rod (104). The first clamping plate (102) is clamped to the fixing part (101) on both sides of the top of the water tank (6) via the first nut (105).

4. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 3, characterized in that, There are two slide rods (103). The two slide rods (103) are parallel and symmetrical about the middle position of the top horizontal end of the fixed part (101). The slide rods (103) are parallel to the top of the fixed part (101). The slide rods (103) pass through the first clamping plate (102) to form a limiting slide.

5. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 4, characterized in that, The first threaded rod (104) is located in the middle between the two sliding rods (103), and the sliding rods (103) are symmetrical about the first threaded rod (104). The first threaded rod (104) is parallel to the sliding rods (103). The first nut (105) is threaded onto the first threaded rod (104) located on the side of the first clamping plate (102) away from the fixed part (101).

6. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 5, characterized in that, The fixing part (101) is provided with a limiting groove (106) on the side adjacent to the slide rod (103).

7. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 6, characterized in that, Each caliper clamp (2) includes an L-shaped mounting block (201). The vertical end of the L-shaped mounting block (201) is provided with a limiting block (202) that matches the limiting groove (106). The limiting block (202) is embedded in the limiting groove (106) to form a limiting installation. The horizontal end of the L-shaped mounting block (201) is supported on the top of the water tank (6). The horizontal end of the L-shaped mounting block (201) is provided with a protruding slide rail (203). The bottom of the second clamping plate (204) is connected to the sliding groove (205) and... The corresponding raised slide rail (203) forms a limiting slide. The vertical end of the L-shaped mounting block (201) is provided with a second screw (206) parallel to the raised slide rail (203). The second screw (206) passes through the second clamping plate (204) and is threaded with a second nut (207). The bottom of the caliper (3) is supported on the raised slide rail (203), and the second clamping plate (204) is clamped on both sides of the caliper (3) by the second nut (207) and the vertical end of the L-shaped mounting block (201).

8. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 1, characterized in that, The positioning component (4) includes a sliding ring (401) that is slidably mounted on the caliper (3). A positioning screw (402) is threaded on the back side of the sliding ring (401), and the sliding ring (401) is pressed and fixed to the caliper (3) by the positioning screw (402). A positioning groove (403) is provided on the front side of the sliding ring (401), and a threaded hole is provided in the positioning groove (403).

9. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 8, characterized in that, The transducer clamp (5) includes a vertical part (501), which is installed in the positioning groove (403) and forms a fixed fit with the positioning groove (403) by fastening screws (503). The bottom of the vertical part (501) is provided with a clamping and mounting part (502) for fixing the transducer.

10. The device for calibrating the time delay of a cross-hole acoustic transmission detection equipment system for foundation piles according to claim 1, characterized in that, The top and bottom of the water tank (6) are both provided with rubber rings (7) concentrically and coaxially, and the caliper fixing piece (1) is clamped on the rubber ring (7) at the top.

Images