An ultrasonic concrete defect detector

Abstract

The application relates to the technical field of concrete detection, and discloses a concrete defect ultrasonic detector, which comprises a detector body, a power cord, a detection sonar pipe, a detection sleeve and a supporting mechanism arranged on the outer side of the detection sleeve and used for supporting the detection sleeve, a plurality of adjusting mechanisms are arranged at the bottom of the detection sleeve and used for enabling the power cord to be located at the center of a hole, the adjusting mechanism comprises a pressing square cylinder fixed to the bottom surface of the detection sleeve, an adjusting inclined block horizontally slidably arranged in the pressing square cylinder and a pressing straight rod fixed to the side wall of the adjusting inclined block and away from the detection sleeve, the end of the pressing straight rod away from the detection sleeve penetrates through the pressing square cylinder and is fixed with a circular arc curved plate, the top surface of the adjusting inclined block is obliquely arranged, and the outer side of the detection sleeve is provided with a driving mechanism used for driving the adjusting inclined block to move. The application has the effect of improving the difficulty of keeping the sonar pipe in the middle of the drill hole and the influence on the test results.

Description

Technical Field

[0001] This invention relates to the field of concrete testing technology, and in particular to an ultrasonic testing instrument for concrete defects. Background Technology

[0002] Ultrasonic testing is the most commonly used method for testing the quality of concrete pile foundations. It involves pre-embedding two, three, or four parallel sonic logging tubes in the pile foundation, with a probe placed in each tube. The probe is first placed at the bottom of the sonic logging tube, and the tube is filled with water as a coupling medium. A counting pulley is used to pull the probe, and the probe, including the transmitting probe and the receiving probe, moves synchronously upward inside the sonic logging tube to detect defects in the pile foundation.

[0003] For example, Chinese utility model patent CN210321994U discloses a protective device for the acoustic logging tube of an ultrasonic detector, including a detector and an acoustic logging tube extending into a drill hole, an electric wire fixedly connected to one end of the acoustic logging tube, and the other end of the electric wire plugged into the detector. A protective tube is provided on the outer wall of the acoustic logging tube, comprising a first circular tube and a second circular tube, with one end of the sidewalls of the first and second circular tubes hinged together. Threaded grooves are formed at the other end of the sidewalls of the first and second circular tubes, connecting the first and second circular tubes. A screw is threaded into the threaded groove, and a compression spring is fixedly connected between the inner and outer walls of the protective tube.

[0004] Regarding the aforementioned related technologies, the inventors believe that when the protective device for the acoustic tube of the ultrasonic detector is placed inside the borehole, the sonar tube is protected by the protective tube and thus placed inside the borehole. When the sonar tube is placed inside the borehole, it is necessary to keep the sonar tube in the middle of the borehole. However, with the protective device for the acoustic tube of the ultrasonic detector, it is difficult to keep the sonar tube in the middle of the borehole during testing, which has a certain impact on the test results. Summary of the Invention

[0005] To address the problem that it is difficult to keep the sonar tube in the center of the borehole, which affects the test results, this application provides an ultrasonic detector for concrete defects.

[0006] This application provides an ultrasonic detector for concrete defects, which adopts the following technical solution:

[0007] An ultrasonic testing instrument for concrete defects includes a testing body, a power cord, a sonar tube, a testing sleeve, and a support mechanism disposed on the outside of the testing sleeve for supporting the testing sleeve. The bottom of the testing sleeve has several adjustment mechanisms for centering the power cord at the opening. Each adjustment mechanism includes a pressure-retaining square tube fixed to the bottom surface of the testing sleeve, an adjusting inclined block horizontally slidable inside the pressure-retaining square tube, and a pressure-retaining straight rod fixed to the side wall of the adjusting inclined block away from the testing sleeve. The end of the pressure-retaining straight rod away from the testing sleeve extends through the pressure-retaining square tube and is fixed with an arc-shaped plate. The top surface of the adjusting inclined block is inclined from bottom to top away from the testing sleeve. A driving mechanism for moving the adjusting inclined block is disposed on the outside of the testing sleeve.

[0008] By adopting the above technical solution, the drive mechanism adjusts the inclined block to push the pressing rods to slide away from the detection sleeve. Several pressing rods push the arc-shaped plate to simultaneously abut against the inner wall of the concrete opening being tested, thereby ensuring that the detection sleeve is positioned at the center of the detection opening. Then, the sonar tube is laid out towards the inside of the detection sleeve to keep it as centered as possible in the detection opening, thus improving the problem that it is difficult to keep the sonar tube in the center of the borehole, which affects the test results.

[0009] Optionally, the driving mechanism includes a limiting sleeve sleeved on the outside of the detection sleeve, a plurality of driving rods vertically fixed to the bottom surface of the limiting sleeve with the axis of the limiting sleeve as the axis, and a limiting component disposed on the periphery of the limiting sleeve to minimize the retraction of the limiting sleeve. The bottom end of the driving rod passes through the inside of the pressing square tube and is fixed with a driving inclined block. The bottom surface of the driving inclined block is inclined from bottom to top in a direction away from the detection sleeve. The plurality of driving inclined blocks correspond one-to-one with the plurality of adjusting inclined blocks. The bottom surface of the driving inclined block is in contact with the inclined surface of the corresponding adjusting inclined block. The driving inclined block is disposed at the top position of the adjusting inclined block.

[0010] By adopting the above technical solution, the operator presses the limiting sleeve, and the limiting sleeve drives the driving inclined block to slide vertically downward through the driving straight rod. The driving inclined block pushes the pressing straight rod to slide away from the detection sleeve through the adjustment of the inclined block. Several pressing straight rods push the arc plate to simultaneously abut against the inner wall of the concrete opening to be detected, so that the detection sleeve is located in the center of the detection opening.

[0011] Optionally, the outer circumferential surface of the detection sleeve is vertically provided with a plurality of ratchet gear rings, the top surface of the ratchet gear rings being inclined from top to bottom in the direction away from the detection sleeve. The limiting component includes a locking square tube passing through the periphery of the limiting sleeve, the locking square tube having a locking groove on its side wall near the detection sleeve, the limiting component also including a locking wedge block passing through the locking groove and inside the locking square tube, and a locking spring fixedly connected between the bottom of the locking groove and the end of the locking wedge block. The bottom surface of the locking wedge block is inclined from top to bottom in the direction near the locking spring, and a pressing mechanism for driving the locking square tube to slide is provided on the outer side of the limiting sleeve.

[0012] By adopting the above technical solution, the ratchet gear ring on the outer circumference of the detection sleeve effectively prevents the limiting sleeve from retracting. When the operator presses the limiting sleeve, the bottom surface of the locking wedge block is in contact with the top surface of the ratchet gear ring. As the detection sleeve moves downward, the locking wedge block retracts into the locking square tube and extends out of the locking square tube due to the elastic force of the locking spring. When the operator stops pressing the limiting sleeve, the top surface of the locking wedge block is in contact with the bottom surface of the ratchet gear ring, thereby limiting the displacement of the detection sleeve.

[0013] Optionally, the pressing mechanism includes a support inclined block fixed to the side wall of the locking square tube away from the locking inclined block, a pressing sleeve sleeved on the outer circumferential surface of the limiting sleeve, a pressing ring coaxially fixed to the inner circumferential surface of the top of the pressing sleeve, a plurality of electromagnets fixed to the top surface of the limiting sleeve, and a plurality of iron blocks fixed to the bottom surface of the pressing ring. The plurality of electromagnets and the plurality of iron blocks correspond one-to-one and can attract each other. The top surface of the support inclined block is inclined to the bottom surface of the pressing sleeve, and the bottom surface of the pressing sleeve is in contact with the inclined surface of the support inclined block.

[0014] By adopting the above technical solution, when the operator needs to detect concrete defects, the electromagnet at the top of the support sleeve is activated. The electromagnet attracts the iron block on the bottom surface of the pressure ring, thereby causing the pressure ring to slide vertically downward through the attraction between the electromagnet and the iron block. The pressure sleeve, through the support inclined block, pushes the pressure square tube towards the detection sleeve until the bottom surface of the locking inclined block is in contact with the top surface of the ratchet gear ring. When the operator needs to detect concrete defects, the electromagnet at the top of the support sleeve is deactivated, and the locking square tube moves away from the detection sleeve by elastic force. The locking inclined block and the ratchet gear ring are no longer in contact. At this time, the pressure sleeve also slides vertically upward by elastic force, thus controlling the operation of the entire device. The operation is simple and convenient.

[0015] Optionally, the inner circumferential surface of the detection sleeve is provided with two clamping mechanisms for clamping the power cord. The two clamping mechanisms are symmetrically arranged. Each clamping mechanism includes a telescopic sleeve installed above the detection sleeve, two telescopic rods passing through the ports at both ends of the telescopic sleeve and inserted inside the telescopic sleeve, and a telescopic spring fixedly connected to the adjacent ends of the two telescopic rods. A wire-feeding pulley is rotatably installed at the adjacent ends of the two telescopic rods of the clamping mechanism, and a control mechanism for adjusting the clamping angle of the other telescopic rod is provided at the end of the other telescopic rod away from the telescopic sleeve.

[0016] By adopting the above technical solution, the operator lays the power cord of the detector body around the wire-laying pulleys, and the control mechanism drives the telescopic sleeve and telescopic rod to adjust the angle until the two wire-laying pulleys clamp the power cord around their sides. Because of the telescopic sleeve and telescopic rod, this clamping mechanism can hold power cords of different thicknesses and types, thereby ensuring that the power cord is centered inside the detection sleeve.

[0017] Optionally, the control mechanism includes a rotating gear ring rotatably mounted on the top surface of the detection sleeve, a drive motor fixed to the top surface of the pressing ring, a clamping rod rotatably mounted on the top of the detection sleeve, bevel gears coaxially fixed to the near ends of the two clamping rods, and a drive gear coaxially fixed to the clamping rods away from the bevel gears. The two bevel gears are meshed with each other, the drive gear is meshed with the rotating gear ring, and a limiting gear is coaxially fixed to the output shaft of the drive motor, the limiting gear being meshed with the rotating gear ring.

[0018] By adopting the above technical solution, the drive motor is powered on and started. The drive motor drives the limiting gear to rotate through the limiting rod. The limiting gear drives the rotating gear ring to rotate. The rotating gear ring drives one of the clamping rods to rotate through the drive gear. The two clamping rods rotate synchronously through the bevel gear. The other clamping rod drives the telescopic sleeve and telescopic rod to adjust the angle.

[0019] Optionally, the outer circumferential surface of the detection sleeve is vertically provided with a plurality of dovetail grooves. The detection sleeve is provided with a guide mechanism for guiding the limiting sleeve through the dovetail grooves. The guide mechanism includes a dovetail protrusion disposed on the periphery of the detection sleeve through the dovetail grooves and a limiting sleeve fixed to the side wall of the dovetail protrusion near the limiting sleeve. A connecting rod is fixedly connected between the inner circumferential surface of the limiting sleeve and the side wall of the dovetail protrusion.

[0020] By adopting the above technical solution, the dovetail protrusion on the inner circumferential surface of the limiting sleeve is vertically slidably disposed on the outer circumferential surface of the detection sleeve through the dovetail through groove, thereby making the limiting sleeve vertically slidably disposed on the outer circumferential surface of the detection sleeve.

[0021] Optionally, the support mechanism includes a support sleeve coaxially sleeved on the outside of the detection sleeve, a support ring coaxially fixed to the periphery of the top of the support sleeve, and support balls rotatably mounted on the bottom surface of the support ring with the axis of the support ring being axially rotatable. The bottom surface of the support sleeve is fixed to the top surface of the pressure sleeve.

[0022] By adopting the above technical solution, the device is first placed vertically inside the concrete opening to be tested until the support ball bearings at the bottom of the support ring abut against the edge of the opening; then the adjustment mechanism starts to work. Since the adjustment mechanism will drive the detection sleeve, support sleeve and support ring to move as a whole, the function of the support ball bearings is to reduce the friction between the support ring and the bottom surface, so that the device can move more easily.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The drive mechanism, by adjusting the inclined block, pushes the pressure rod to slide away from the detection sleeve. The pressure rod pushes the arc plate to simultaneously abut against the inner wall of the concrete opening being tested, thereby ensuring that the detection sleeve is positioned at the center of the opening. Then, the sonar tube is laid out towards the inside of the detection sleeve to keep it as centered as possible in the opening, thus improving the problem that it is difficult to keep the sonar tube in the center of the borehole, which affects the test results.

[0025] 2. The ratchet gear ring on the outer circumference of the detection sleeve effectively prevents the limiting sleeve from retracting. When the operator presses the limiting sleeve, the bottom surface of the locking wedge block engages with the top surface of the ratchet gear ring. As the detection sleeve moves downward, the locking wedge block retracts into and extends out of the locking square tube due to the elastic force of the locking spring. When the operator stops pressing the limiting sleeve, the top surface of the locking wedge block engages with the bottom surface of the ratchet gear ring, thus limiting the displacement of the detection sleeve.

[0026] 3. The operator places the power cord of the testing instrument around the circumference of the wire-feeding pulleys. The control mechanism adjusts the angle of the telescopic sleeve and telescopic rod, and the two wire-feeding pulleys clamp the power cord around their sides. Because of the telescopic sleeve and telescopic rod, this clamping mechanism can hold power cords of different thicknesses and types, thus ensuring that the power cord is centered inside the testing sleeve. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0028] Figure 2 This is an exploded schematic diagram of the bottom of the pressing ring in an embodiment of this application.

[0029] Figure 3This is a schematic diagram of the structure of removing the support sleeve and support ring in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of an explosion outside the detection sleeve in an embodiment of this application.

[0031] Figure 5 This is an exploded schematic diagram of the limiting sleeve and the pressing sleeve in the embodiments of this application.

[0032] Figure 6 yes Figure 4 An enlarged schematic diagram of part A in the middle.

[0033] Reference numerals: 11. Detector body; 12. Power cord; 13. Detection sonar tube; 14. Detection sleeve; 15. Support sleeve; 16. Support ring; 17. Ball groove; 18. Support ball; 19. Limiting ring; 20. Limiting through groove; 21. Ratchet gear ring; 22. Dovetail through groove; 23. Dovetail protrusion; 24. Connecting straight rod; 25. Limiting sleeve; 26. Clearance through hole; 27. Locking structure; 28. Locking square tube; 29. ​​Locking square frame one; 30. Locking square frame two; 31. Compression spring; 32. Locking groove; 33. Locking wedge; 34. Locking spring; 35. Support wedge; 36. Pressing sleeve; 37. Pressing ring; 38. Electromagnet; 3 9. Iron block; 40. Pressing structure; 41. Pressing square tube; 42. Adjusting inclined block; 43. Pressing through hole; 44. Pressing straight rod; 45. Arc plate; 46. Square tube through hole; 47. Driving straight rod; 48. Driving inclined block; 49. Rotating gear ring; 50. Sleeve groove; 51. Planar thrust bearing; 52. Clamping structure; 53. Supporting horizontal plate; 54. Supporting vertical plate one; 55. Supporting vertical plate two; 56. Vertical plate through hole; 57. Clamping straight rod; 58. Bevel gear; 59. Driving gear; 60. Telescopic sleeve; 61. Telescopic sleeve rod; 62. Telescopic spring; 63. Wire feeding pulley; 64. Wire feeding groove; 65. Drive motor; 66. Limiting straight rod; 67. Limiting gear. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0035] This application discloses an ultrasonic testing instrument for concrete defects. (Refer to...) Figure 1-3As shown, the ultrasonic concrete defect detector includes a detector body 11, a power cord 12, a detection sonar tube 13, a detection sleeve 14, a support sleeve 15 coaxially sleeved on the outside of the detection sleeve 14, and a support ring 16 coaxially fixed to the outer circumferential surface of the top of the support sleeve 15. A ball bearing groove 17 is formed on the bottom surface of the support ring 16 with its own axis as the axial direction. Support balls 18 are rolled and installed on the support ring 16 through the ball bearing groove 17. A limiting ring 19 is coaxially fixed on the bottom surface of the support ring 16. A limiting through groove 20 is formed on the bottom surface of the limiting ring 19 with its own axis as the axial direction. Several limiting through grooves 20 correspond one-to-one with several ball bearing grooves 17 and are interconnected. The inner diameter of the limiting groove 20 is smaller than the diameter of the support ball 18, so that the bottom of the support ball 18 passes through the limiting groove 20 and exceeds the limiting ring 19, and the limiting ring 19 passes through the limiting groove 20 to minimize the risk of the support ball 18 falling off.

[0036] Reference Figure 1 , Figure 4 and Figure 5 A ratchet gear ring 21 is axially arranged around the outer periphery of the detection sleeve 14. Several ratchet gear rings 21 are vertically arranged, with their top surfaces inclined downwards away from the detection sleeve 14. Three dovetail grooves 22 are vertically formed on the outer periphery of the detection sleeve 14. These three grooves are evenly spaced around the axis of the detection sleeve 14, and each dovetail groove has a dovetail-shaped cross-section. A dovetail protrusion 23 is engaged with the detection sleeve 14 via the dovetail grooves 22. The dovetail protrusion 23 has a dovetail-shaped cross-section, and a connecting rod 24 is fixed to the dovetail protrusion 23 near the side wall of the support sleeve 15. A limiting sleeve 25 is coaxially sleeved on the outer side of the detection sleeve 14. The limiting sleeve 25 is located inside the support sleeve 15. The ends of the three connecting straight rods 24 near the support sleeve 15 are all fixed to the inner circumferential surface of the limiting sleeve 25. The limiting sleeve 25 has a clearance through hole 26 that penetrates its own circumference. There are three clearance through holes 26 evenly spaced around the axis of the limiting sleeve 25. The limiting sleeve 25 is provided with a locking structure 27 through the clearance through holes 26 to minimize the retraction of the limiting sleeve 25.

[0037] Reference Figure 1 , Figure 4 and Figure 5The locking structure 27 includes a locking square tube 28 that passes through a clearance through hole 26 around the periphery of the limiting sleeve 25, a locking square frame 29 fixed to the inner wall of the limiting sleeve 25, and a locking square frame 30 fixed to the periphery of the limiting sleeve 25. Both locking square frames 29 and 30 are rectangular frame structures formed by four straight rods. A compression spring 31 is fixedly connected between the adjacent side walls of locking square frames 29 and 30, and the compression spring 31 is sleeved around the periphery of the locking square tube 28. The end of the locking square tube 28 away from the support sleeve 15 passes through the inner side of the locking square frame 29. The locking square tube 28 has a locking groove 32 along its length on the side wall opposite to the support sleeve 15. A locking wedge 33 passes through the locking groove 32 inside the locking square tube 28. The bottom surface of the locking wedge 33 is inclined from top to bottom towards the support sleeve 15. A locking spring 34 is fixedly connected between the bottom of the locking groove 32 and the end of the locking wedge 33.

[0038] Reference Figure 1 , Figure 4 and Figure 5 A support inclined block 35 is fixedly installed on the side wall of the locking square tube 28 near the support sleeve 15. The top surface of the support inclined block 35 is inclined from top to bottom, facing away from the detection sleeve 14. A pressing sleeve 36 is coaxially sleeved on the outer circumference of the limiting sleeve 25. The bottom surface of the pressing sleeve 36 is inclined from top to bottom, facing towards the limiting sleeve 25, and the bottom surface of the pressing sleeve 36 is in contact with the inclined surface of the support inclined block 35. A pressing ring 37 is coaxially fixed on the inner circumference of the top of the pressing sleeve 36. Three electromagnets 38 are equally spaced on the top surface of the limiting sleeve 25 with its own axis as the axial direction. Three iron blocks 39 are equally spaced on the bottom surface of the pressing ring 37 with its own axis as the axial direction. The three electromagnets 38 and the three iron blocks 39 correspond one-to-one and can attract each other.

[0039] Reference Figure 1 and Figure 3 A pressing structure 40 is provided between the bottom of the detection sleeve 14 and the support sleeve 15. Three pressing structures 40 are equally spaced axially around the axis of the detection sleeve 14. The pressing structure 40 includes a pressing square tube 41, which is fixed to the bottom surface of the detection sleeve 14 and the support sleeve 15. The pressing square tube 41 is a hollow cylindrical structure with a cuboid shape. An adjusting inclined block 42 is slidably provided inside the pressing square tube 41 along its own length direction. The top surface of the adjusting inclined block 42 is inclined from bottom to top in the direction away from the detection sleeve 14. A pressing straight rod 44 is inserted through the pressing through hole 43 of the pressing square tube 41. One end of the pressing straight rod 44 is vertically fixed to the adjusting inclined block 42 away from the side wall of the detection sleeve 14. The other end of the pressing straight rod 44 extends out of the pressing square tube 41 and is fixed with an arc-shaped curved plate 45. The arc-shaped curved plate 45 is recessed in the direction away from the detection sleeve 14.

[0040] Reference Figure 1 and Figure 3 A pressure spring 68 is fixedly connected between the adjusting inclined block 42 and the inner wall of the pressure square tube 41. The pressure spring 68 is sleeved around the pressure straight rod 44. The side wall of the pressure square tube 41 away from the detection sleeve 14 has a pressure through hole 43. The top surface of the pressure square tube 41 has a square tube through hole 46. The pressure square tube 41 is connected to a driving straight rod 47 through the square tube through hole 46. The bottom end of the driving straight rod 47 is fixed with a driving inclined block 48. The top end of the driving straight rod 47 is fixed with the bottom surface of the limiting sleeve 25. The bottom surface of the driving inclined block 48 is inclined from bottom to top in the direction away from the detection sleeve 14. The bottom surface of the driving inclined block 48 is in contact with the inclined surface of the adjusting inclined block 42. The driving inclined block 48 is located at the top position of the adjusting inclined block 42.

[0041] Reference Figure 1 and Figure 6 The top surface of the detection sleeve 14 has a sleeve groove 50 axially formed around its own axis. A rotating gear ring 49 is mounted on the detection sleeve 14 through the sleeve groove 50. A planar thrust bearing 51 is installed between the bottom surface of the rotating gear ring 49 and the bottom of the sleeve groove 50, thereby enabling the rotating gear ring 49 to be rotatably mounted on the top of the detection sleeve 14 via the planar thrust bearing 51. The rotating gear ring 49 is a ring structure with a ring of teeth on the top. The detection sleeve 14 has two clamping structures 52 for clamping the power cord 12, which are symmetrically arranged. The clamping structure 52 includes a horizontal support plate 53 fixed to the inner wall of the detection cylinder, and a first support plate 54 and a second support plate 55 fixed to the top surface of the horizontal support plate 53. The first support plate 54 and the second support plate 55 are arranged perpendicularly to each other. Both the first support vertical plate 54 and the second support vertical plate 55 have through holes 56, and both the first support vertical plate 54 and the second support vertical plate 55 have clamping rods 57 passing through the through holes 56.

[0042] Reference Figure 1 and Figure 6Two clamping rods 57 are coaxially fixed with bevel gears 58 at their near ends, and the two bevel gears 58 are meshed together. A drive gear 59 is coaxially fixed at the end of the clamping rod 57 that passes through the supporting vertical plate 54, away from the bevel gears 58, and the drive gear 59 meshes with the rotating gear ring 49. The clamping structure 52 also includes a telescopic sleeve 60, two telescopic sleeve rods 61 that pass through the ends of the telescopic sleeve 60 and are inserted inside the telescopic sleeve 60, and a telescopic spring 62 fixedly connected to the near ends of the two telescopic sleeve rods 61. One telescopic sleeve rod 61 is fixed to the end of the clamping rod 57 that passes through the supporting vertical plate 55, away from the bevel gears 58, and the other telescopic sleeve rod 61 is rotatably mounted with a wire-feeding pulley 63, which has a wire-feeding groove 64 around its circumference. A drive motor 65 is fixedly mounted on the top surface of the pressure ring 37. A limiting rod 66 is coaxially fixed to the output shaft of the drive motor 65. A limiting gear 67 is coaxially fixed to the end of the limiting rod 66 away from the drive motor 65. The limiting gear 67 is meshed with the rotating gear ring 49.

[0043] The implementation principle of the ultrasonic testing instrument for concrete defects in this application embodiment is as follows: First, the device is placed vertically inside the concrete opening to be tested until the support ball bearing 18 at the bottom of the support ring 16 abuts against the edge of the opening; the electromagnet 38 at the top of the support sleeve 15 is energized and activated, attracting the iron block 39 on the bottom surface of the pressing ring 37, thereby causing the pressing ring 37 to slide vertically downward through the attraction between the electromagnet 38 and the iron block 39. The pressing sleeve 36 pushes the pressing square cylinder 41 towards the direction closer to the testing sleeve 14 through the support inclined block 35, until the bottom surface of the locking inclined block 33 is in contact with the top surface of the ratchet gear ring 21. The operator presses the limiting sleeve 25. Because the dovetail protrusion 23 on the inner circumference of the limiting sleeve 25 slides vertically onto the outer circumference of the detection sleeve 14 through the dovetail groove 22, the limiting sleeve 25 slides vertically onto the outer circumference of the detection sleeve 14. The limiting sleeve 25, driven by the driving straight rod 47, drives the driving inclined block 48 to slide vertically downwards. Simultaneously, the locking inclined block 33's top surface contacts the bottom surface of the ratchet gear ring 21, effectively preventing the limiting sleeve 25 from retracting. The driving inclined block 48, by adjusting the inclined block 42, pushes the pressing straight rod 44 to slide away from the detection sleeve 14. Several pressing straight rods 44 push the arc-shaped plate 45 to simultaneously abut against the inner wall of the concrete opening being tested, thus ensuring that the detection sleeve 14 is positioned at the center of the detection opening.

[0044] The operator places the power cord 12 of the detector body 11 around one of the wire-feeding pulleys 63 through the wire-feeding groove 64. The drive motor 65 is started, and the drive motor 65 drives the limiting gear 67 to rotate through the limiting rod 66. The limiting gear 67 drives the rotating gear ring 49 to rotate. The rotating gear ring 49 drives the clamping rod 57 through the support vertical plate 1 54 to rotate through the drive gear 59. The two clamping rods 57 rotate synchronously through the bevel gear 58. The clamping rod 57 through the support vertical plate 2 55 drives the telescopic sleeve 60 and telescopic rod 61 to adjust the angle until the two wire-feeding pulleys 63 are clamped around the power cord 12 through the wire-feeding groove 64, thereby realizing that the power cord 12 is located in the center position inside the detection sleeve 14.

[0045] When the drive motor 65 is energized and reverses, and the electromagnet 38 is de-energized and shut off, the locking square tube 28 moves away from the detection sleeve 14 due to the elastic force of the locking spring 34. The locking wedge block 33 is no longer in contact with the ratchet gear ring 21. At this time, the pressing sleeve 36 also slides vertically upward due to the elastic force of the locking spring 34. The arc plate 45 moves closer to the inside of the detection sleeve 14 due to the elastic force of the compression spring 31. At this time, the adjusting wedge block 42 pushes the driving wedge block 48 to move vertically upward due to the elastic force of the compression spring 31. The driving wedge block 48 pushes the limiting sleeve 25 to slide vertically upward through the driving straight rod 47, thereby restoring the device to its initial state.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An ultrasonic testing instrument for concrete defects, comprising a testing instrument body (11), a power cord (12), a detection sonar tube (13), a detection sleeve (14), and a support mechanism disposed outside the detection sleeve (14) for supporting the detection sleeve (14), characterized in that: The bottom of the detection sleeve (14) is provided with several adjustment mechanisms for positioning the detection sonar tube (13) at the center of the opening. The adjustment mechanism includes a pressure square tube (41) fixed to the bottom surface of the detection sleeve (14), an adjustment inclined block (42) horizontally slidably disposed inside the pressure square tube (41), and a pressure straight rod (44) fixed to the side wall of the adjustment inclined block (42) away from the detection sleeve (14). The end of the pressure straight rod (44) away from the detection sleeve (14) passes through the pressure square tube (41) and is fixed with an arc plate (45). The top surface of the adjustment inclined block (42) is inclined from bottom to top in a direction away from the detection sleeve (14). The outer side of the detection sleeve (14) is provided with a driving mechanism for driving the adjustment inclined block (42) to move. The driving mechanism includes a limiting sleeve (25) sleeved on the outside of the detection sleeve (14), a plurality of driving rods (47) vertically fixed to the bottom surface of the limiting sleeve (25) with the axis of the limiting sleeve (25) as the axis, and a limiting component disposed on the periphery of the limiting sleeve (25) to minimize the retraction of the limiting sleeve (25). The bottom end of the driving rod (47) passes through the inside of the pressing square tube (41) and is fixed with a driving inclined block (48). The bottom surface of the driving inclined block (48) is inclined from bottom to top in the direction away from the detection sleeve (14). The plurality of driving inclined blocks (48) correspond one-to-one with the plurality of adjusting inclined blocks (42). The bottom surface of the driving inclined block (48) is in contact with the inclined surface of the corresponding adjusting inclined block (42). The driving inclined block (48) is disposed at the top of the adjusting inclined block (42).

2. The concrete defect ultrasonic detector according to claim 1, characterized in that: The outer circumferential surface of the detection sleeve (14) is vertically provided with a plurality of ratchet gear rings (21). The top surface of the ratchet gear rings (21) is inclined from top to bottom in the direction away from the detection sleeve (14). The limiting component includes a locking square tube (28) passing through the periphery of the limiting sleeve (25). The side wall of the locking square tube (28) near the detection sleeve (14) is provided with a locking groove (32). The limiting component also includes a locking wedge (33) passing through the locking groove (32) and inside the locking square tube (28), and a locking spring (34) fixedly connected between the bottom of the locking groove (32) and the end of the locking wedge (33). The bottom surface of the locking wedge (33) is inclined from top to bottom in the direction close to the locking spring (34). The outer side of the limiting sleeve (25) is provided with a pressing mechanism for driving the locking square tube (28) to slide.

3. The concrete defect ultrasonic detector according to claim 2, characterized in that: The pressing mechanism includes a support inclined block (35) fixed to the side wall of the locking square tube (28) away from the locking inclined block (33), a pressing sleeve (36) sleeved on the outer circumferential surface of the limiting sleeve (25), a pressing ring (37) coaxially fixed to the inner circumferential surface of the top of the pressing sleeve (36), a plurality of electromagnets (38) fixed to the top surface of the limiting sleeve (25), and a plurality of iron blocks (39) fixed to the bottom surface of the pressing ring (37). The plurality of electromagnets (38) and the plurality of iron blocks (39) correspond one-to-one and can attract each other. The top surface of the support inclined block (35) is inclined to the bottom surface of the pressing sleeve (36), and the bottom surface of the pressing sleeve (36) is in contact with the inclined surface of the support inclined block (35).

4. The ultrasonic testing instrument for concrete defects according to claim 1, characterized in that: The inner circumferential surface of the detection sleeve (14) is provided with two clamping mechanisms for clamping the power cord (12). The two clamping mechanisms are arranged symmetrically. Each clamping mechanism includes a telescopic sleeve (60) installed above the detection sleeve (14), two telescopic rods (61) passing through the ports at both ends of the telescopic sleeve (60) and passing through the inside of the telescopic sleeve (60), and a telescopic spring (62) fixedly connected to the close ends of the two telescopic rods (61). A wire feeding pulley (63) is rotatably installed at the close ends of the two telescopic rods (61) of the clamping mechanism. A control mechanism for adjusting the clamping angle of the other telescopic rod (61) is provided at the end of the other telescopic rod (61) away from the telescopic sleeve (60).

5. The concrete defect ultrasonic detector according to claim 4, characterized in that: The control mechanism includes a rotating gear ring (49) rotatably mounted on the top surface of the detection sleeve (14), a drive motor (65) mounted above the detection sleeve (14), a clamping rod (57) rotatably mounted on the top of the detection sleeve (14), a bevel gear (58) coaxially fixed to the two clamping rods (57) at their close ends, and a drive gear (59) coaxially fixed to the clamping rods (57) away from the bevel gears (58). The two bevel gears (58) are meshed with each other, and the drive gear (59) meshes with the rotating gear ring (49). A limiting gear (67) is coaxially fixed to the output shaft of the drive motor (65), and the limiting gear (67) meshes with the rotating gear ring (49).

6. The concrete defect ultrasonic detector according to claim 1, characterized in that: The outer circumferential surface of the detection sleeve (14) is vertically provided with a plurality of dovetail grooves (22). The detection sleeve (14) is provided with a guide mechanism for guiding the limiting sleeve (25) through the dovetail grooves (22). The guide mechanism includes a dovetail protrusion (23) provided on the periphery of the detection sleeve (14) through the dovetail grooves (22). A connecting rod (24) is fixedly connected between the inner circumferential surface of the limiting sleeve (25) and the side wall of the dovetail protrusion (23).

7. The concrete defect ultrasonic detector according to claim 3, characterized in that: The support mechanism includes a support sleeve (15) coaxially sleeved on the outside of the detection sleeve (14), a support ring (16) coaxially fixed to the periphery of the top of the support sleeve (15), and a support ball (18) rotatably mounted on the bottom surface of the support ring (16) with the axis of the support ring (16) as the axis. The bottom surface of the support sleeve (15) is fixed to the top surface of the pressure square tube (41).

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