Foundation pile ultrasonic zero sound time calibration device

Abstract

The utility model discloses a foundation pile ultrasonic zero sound time calibration device which comprises a water tank, two connecting plates are fixed to the top of the water tank, two parallel rods are fixed to the surfaces of the connecting plates, a reference graduated scale is fixed between the connecting plates on the two sides, and two locking plates are connected to the surfaces of the parallel rods in a sliding mode. An extension plate is fixed to the bottom of the locking plate, locking grooves are formed in the surfaces of the locking plate and the extension plate, a pointer is fixed to the surface of the locking plate, operating rods penetrate through the surfaces of the locking plate and the extension plate, baffles are fixed to the bottoms of the operating rods, and first friction pads are fixed to the inner walls of the locking grooves; a second friction pad is fixed to the top of the baffle. The transducer calibration device has the advantages that the position between the transducers on the two sides can be conveniently adjusted, the transducers can be fixed, the calibration distance can be accurately reflected, and therefore calibration work of the transducers is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic detection, in particular to a foundation pile ultrasonic zero-sound time calibration device. Background Art

[0002] Zero acoustic time calibration refers to a calibration step of the ultrasonic testing system before actual testing. Its purpose is to eliminate the influence of the system's inherent delay time and the propagation time of the sound wave in non-concrete media to ensure the accuracy of the measurement.

[0003] Currently, when calibrating the ultrasonic zero-sound time of foundation piles, manual handheld transducers are used and the calibration is performed by moving the positions between the transducers. However, manual operation is time-consuming and labor-intensive, and has poor precision, making it difficult to calibrate accurately, thus affecting measurement accuracy. Utility Model Content

[0004] The purpose of the utility model is to provide a foundation pile ultrasonic zero-sound calibration device, which has the advantages of being able to conveniently adjust the position between the transducers on both sides, and can fix the transducers, and can accurately reflect the calibration distance, thereby realizing the calibration work of the transducers.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a foundation pile ultrasonic zero-sound time calibration device, comprising a water tank, two connecting plates fixed on the top of the water tank, two parallel rods fixed on the surface of the connecting plates, a reference scale fixed between the connecting plates on both sides, two locking plates slidingly connected on the surface of the parallel rods, an extension plate fixed on the bottom of the locking plate, locking grooves provided on the surfaces of the locking plate and the extension plate, a pointer fixed on the surface of the locking plate, an operating rod passing through the surfaces of the locking plate and the extension plate, a baffle fixed on the bottom of the operating rod, a first friction pad fixed on the inner wall of the locking groove, and a second friction pad fixed on the top of the baffle.

[0006] As a preferred embodiment of the ultrasonic zero-time calibration device for pile foundations of the present invention, a third friction pad is fixed to the surface of the extension plate, and the third friction pad is arranged in a trapezoidal structure.

[0007] As a preferred embodiment of the ultrasonic zero-time calibration device for pile foundations of the present invention, a plurality of movable grooves are provided on the surfaces of the first friction pad and the second friction pad.

[0008] As a preferred device for zero-time calibration of ultrasonic pile foundations of the present invention, the surface of the operating rod is detachably connected to two clamping plates, and the surface of the clamping plates is provided with through holes.

[0009] As a preferred device for zero-time calibration of ultrasonic pile foundations of the present invention, a limiting plate is fixed on the inner wall of the clamping plate, and a limiting groove is provided on the surface of the operating rod.

[0010] As a preferred embodiment of the ultrasonic zero-time calibration device for pile foundations of the present invention, anti-slip grooves are provided on the surface of the operating rod, and the first friction pad, the second friction pad and the third friction pad are all made of rubber.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] In the present invention, the locking plate can be inserted into the extension plate between the parallel rods on both sides by moving vertically downward, so that the locking plate fits the surface of the parallel rods and the locking plate can slide on the surface of the parallel rods to confirm the subsequent installation position spacing of the transducers on both sides. During this process, the accurate position between the locking plates on both sides can be confirmed by observing the pointer and the reference scale, thereby improving the accuracy of the calibration work. Afterwards, the cable on the top of the transducer is placed in the locking groove, so that the first friction pad can limit the transducer by friction, and the rotating operating rod can rotate the baffle so that the surface of the second friction pad can be tightly against the bottom of the parallel rod. Fit so that the second friction pad and the parallel rod limit the locking plate through friction. Install the transmitting and receiving transducers on the surface of the locking plate, then add water to the water tank to the appropriate position, and place the transducers parallel to the same height in the clean water. Then, increase the center distance between the two transducers from about 400mm to 100mm. After calibration with the reference scale, it can accurately reflect the calibration distance and measure the corresponding sound time at the same time. Then, draw a graph with the vertical and horizontal axes representing the distance and sound time respectively. The intercept on the horizontal axis of the sound time is t0. The linear regression method can also be used to calculate t0, thereby realizing the calibration of the transducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from another perspective;

[0015] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the partially split structure of the utility model.

[0017] In the figure: 1. water tank; 2. connecting plate; 3. parallel rod; 4. reference scale; 5. locking plate; 6. extension plate; 7. locking groove; 8. pointer; 9. operating lever; 10. baffle; 11. first friction pad; 12. second friction pad; 13. third friction pad; 14. movable groove; 15. clamping plate; 16. limit groove; 17. limit plate; 18. through hole; 19. anti-slip pattern. DETAILED DESCRIPTION

[0018] See also Figure 1-4 , a foundation pile ultrasonic zero sound time calibration device, including a water tank 1, two connecting plates 2 are fixed on the top of the water tank 1, two parallel rods 3 are fixed on the surface of the connecting plate 2, a reference scale 4 is fixed between the connecting plates 2 on both sides, two locking plates 5 are slidably connected on the surface of the parallel rod 3, an extension plate 6 is fixed to the bottom of the locking plate 5, locking grooves 7 are opened on the surface of the locking plate 5 and the extension plate 6, a pointer 8 is fixed on the surface of the locking plate 5, an operating rod 9 is passed through the surface of the locking plate 5 and the extension plate 6, a baffle 10 is fixed to the bottom of the operating rod 9, a first friction pad 11 is fixed to the inner wall of the locking groove 7, and a second friction pad 12 is fixed on the top of the baffle 10;

[0019] The locking plate 5 can be inserted into the extension plate 6 between the parallel rods 3 on both sides by moving vertically downward, so that the locking plate 5 fits the surface of the parallel rod 3 and the locking plate 5 can slide on the surface of the parallel rod 3 to confirm the subsequent installation position spacing of the transducers on both sides. In this process, the accurate position between the locking plates 5 on both sides can be confirmed by observing the pointer 8 and the reference scale 4, thereby improving the accuracy of the calibration work. After that, the cable on the top of the transducer is placed in the locking groove 7, so that the first friction pad 11 can limit the transducer by friction, and the rotating operating rod 9 can rotate the baffle 10 so that the surface of the second friction pad 12 can fit the bottom of the parallel rod 3 The two ends of the transducer are tightly fitted together, so that the second friction pad 12 and the parallel rod 3 limit the locking plate 5 through friction. After the transmitting and receiving transducers are installed on the surface of the locking plate 5, water is added to the water tank 1 to a suitable position. After the transducers are placed parallel to the same height in the clean water, the center distance between the two transducers is gradually increased from about 400 mm to 100 mm. After calibration with the reference scale 4, it can accurately reflect the calibration distance and measure the corresponding sound time at the same time. The vertical and horizontal axes are used to represent the distance and sound time respectively, and the intercept on the horizontal axis of the sound time is t0. The linear regression method can also be used to calculate t0, thereby realizing the calibration of the transducer.

[0020] Furthermore, a third friction pad 13 is fixed on the surface of the extension plate 6, and the third friction pad 13 is arranged in a trapezoidal structure;

[0021] When the locking plate 5 drives the extension plate 6 to be clamped to the surface of the parallel rod 3, the third friction pad 13 will use the inclined surface of its own trapezoid to make itself more easily deformed, so that the third friction pad 13 can pass through the parallel rod 3, thereby improving the anti-slip effect of the extension plate 6 and the locking plate 5 through the friction between the third friction pad 13 and the parallel rod 3.

[0022] Furthermore, a plurality of movable grooves 14 are formed on the surfaces of the first friction pad 11 and the second friction pad 12;

[0023] When the transducer cable is located inside the locking groove 7, the contact between the cable and the first friction pad 11 can cause the first friction pad 11 to be compressed and deformed. At the same time, when the second friction pad 12 contacts the surface of the parallel rod 3, the second friction pad 12 will also be compressed and deformed. The setting of the movable groove 14 allows the first friction pad 11 and the second friction pad 12 to have sufficient space to produce deformation.

[0024] Furthermore, two clamping plates 15 are detachably connected to the surface of the operating rod 9, and a through hole 18 is opened on the surface of the clamping plate 15;

[0025] After the two clamping plates 15 are mounted on the surface of the operating rod 9 , bolts can be passed through the through holes 18 to provide a limiting effect on the clamping plates 15 , thereby preventing the operating rod 9 from vertically falling out of the locking plate 5 .

[0026] Furthermore, a limit plate 17 is fixed to the inner wall of the clamping plate 15, and a limit groove 16 is provided on the surface of the operating rod 9;

[0027] After the clamping plate 15 is mounted on the surface of the operating rod 9 , the limiting plate 17 will be located inside the limiting groove 16 , thereby ensuring that the clamping plate 15 can obtain an upper and lower limiting effect on the surface of the operating rod 9 .

[0028] Furthermore, anti-slip grooves 19 are provided on the surface of the operating rod 9, and the first friction pad 11, the second friction pad 12 and the third friction pad 13 are all made of rubber;

[0029] The provision of the anti-slip grooves 19 makes it easier for the operator to rotate the operating lever 9 , and the rubber material itself is soft and can be deformed, and has a large friction force, which can improve the limiting effect.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A foundation pile ultrasonic zero-time calibration device, comprising a water tank (1), characterized in that: Two connecting plates (2) are fixed on the top of the water tank (1), two parallel rods (3) are fixed on the surface of the connecting plates (2), a reference scale (4) is fixed between the connecting plates (2) on both sides, two locking plates (5) are slidably connected on the surface of the parallel rods (3), an extension plate (6) is fixed on the bottom of the locking plate (5), a locking groove (7) is provided on the surface of the locking plate (5) and the extension plate (6), a pointer (8) is fixed on the surface of the locking plate (5), an operating rod (9) is passed through the surface of the locking plate (5) and the extension plate (6), a baffle (10) is fixed on the bottom of the operating rod (9), a first friction pad (11) is fixed on the inner wall of the locking groove (7), and a second friction pad (12) is fixed on the top of the baffle (10).

2. The ultrasonic zero-time calibration device for pile foundation according to claim 1, characterized in that: A third friction pad (13) is fixed on the surface of the extension plate (6), and the third friction pad (13) is arranged in a trapezoidal structure.

3. The ultrasonic zero-time calibration device for pile foundation according to claim 1, characterized in that: A plurality of movable grooves (14) are provided on the surfaces of the first friction pad (11) and the second friction pad (12).

4. The ultrasonic zero-time calibration device for pile foundation according to claim 1, characterized in that: Two clamping plates (15) are detachably connected to the surface of the operating rod (9), and a through hole (18) is provided on the surface of the clamping plate (15).

5. The ultrasonic zero-time calibration device for pile foundation according to claim 4, characterized in that: A limiting plate (17) is fixed on the inner wall of the clamping plate (15), and a limiting groove (16) is provided on the surface of the operating rod (9).

6. The ultrasonic zero-time calibration device for pile foundation according to claim 2, characterized in that: Anti-skid patterns (19) are provided on the surface of the operating rod (9), and the first friction pad (11), the second friction pad (12) and the third friction pad (13) are all made of rubber.

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