Automatic lifting device for transducer of foundation pile multi-cross-hole ultrasonic testing equipment

Abstract

The invention discloses an automatic transducer lifting device for foundation pile multi-span-hole ultrasonic testing equipment, and belongs to the technical field of foundation pile detection.The automatic transducer lifting device comprises a mounting frame, a bearing plate is mounted on the mounting frame, two bearing blocks are fixed to the top face of the bearing plate, and a rotating rod is rotationally mounted between the two bearing blocks; a plurality of rotating wheels are fixedly arranged on the peripheral face of the rotating rod in a sleeving mode, limiting ring grooves used for placing cables are formed in the peripheral faces of the rotating wheels, a moving plate is installed at the top of the bearing plate, two moving blocks are fixed to the bottom face of the moving plate, a driving rod is rotatably installed between the two moving blocks, and a motor is installed on the side face of one moving block. The output end of the motor is fixedly connected with the end of the driving rod, the peripheral face of the driving rod is fixedly sleeved with a plurality of driving wheels, the driving wheels and the rotating wheels are in one-to-one correspondence, and the peripheral faces of the driving wheels can abut against the cable and drive the cable to move. The method and the device have the effect of relatively accurate detection result.

Description

Technical Field

[0001] The present application relates to the technical field of pile foundation detection, and in particular to an automatic lifting device for a transducer of a pile foundation multi-span hole ultrasonic detection device. Background Art

[0002] In the field of pile testing, ultrasonic testing technology is widely used because it can non-destructively evaluate the integrity of piles. Multi-span ultrasonic testing of piles is a method of evaluating the integrity of piles by emitting and receiving ultrasonic signals inside the piles. This method usually uses a pair of transducers, one for emitting ultrasonic waves and the other for receiving. The transducer moves along a preset path inside the pile and measures parameters such as the propagation time, wave velocity, and waveform of ultrasonic waves in concrete to evaluate whether the piles have defects, such as cracks and cavities.

[0003] The lifting and positioning of the transducer requires precise control to ensure the accuracy and repeatability of the data. However, in actual operation, the lifting operation of the transducer often relies on manual control, which is not only inefficient but also easily affected by the operator's skills and experience, resulting in instability in the test results. Summary of the invention

[0004] In order to improve the problem of poor stability in manually controlling the lifting of a transducer, the present application provides an automatic lifting device for a transducer of a pile foundation multi-span hole ultrasonic detection equipment.

[0005] The present application provides a transducer automatic lifting device for pile multi-span hole ultrasonic detection equipment, which adopts the following technical solution: The camshaft is an axial lift of the plurality of movable parts, and the camshaft is an axial lift of the plurality of movable parts. The movable parts are axially connected to the plurality of movable parts, and the movable parts are axially connected to the plurality of movable parts. The movable parts are axially connected to the plurality of movable parts, and the movable parts are axially connected to the plurality of movable parts.

[0006] By adopting the above technical solution, several cables are placed in the corresponding limit ring grooves respectively, the outer peripheral surface of the driving wheel is pressed against the cable, the motor is started, the motor drives the driving rod to rotate, the driving rod drives several synchronous wheels to rotate synchronously, and the synchronous wheel drives the cable to move, thereby realizing automatic lifting of the transducer. The lifting speed of the transducer can be controlled by the motor, the efficiency is high, and the detection result is more accurate.

[0007] Preferably, an adjustment groove is provided on the top surface of the supporting block, and an adjustment block is installed on the supporting block through the adjustment groove for vertical sliding. An adjustment component for adjusting the position of the adjustment block is provided on the supporting block, and the two movable blocks are respectively a positioning block and a connecting block, and the two adjustment blocks are respectively a fixed block and a contact block, and a cylinder is fixed on the top surface of the fixed block, and the positioning block is sleeved on the outer circumference of the cylinder, the positioning block is rotatably connected to the cylinder, and the connecting block is detachably connected to the contact block.

[0008] By adopting the above technical solution, the height of the bearing block can be fine-tuned using the adjustment component to adapt to the size of the cable, and the positioning block can be rotated at the same time to facilitate the installation of the cable between the rotating wheel and the driving wheel, thereby increasing the applicability and flexibility of the device.

[0009] Preferably, the top surface of the contact block is provided with two snap-in grooves, and the contact block is vertically slidably installed with a snap-in block through the snap-in grooves, and the bottom surface of the connecting block is provided with a snap-in groove for inserting the snap-in block, a slider is fixed to the side of the snap-in block, and a slide groove is provided on the inner wall of the snap-in groove, and the slider vertically slides with the contact block through the slide groove, a spring 1 is fixed to the bottom surface of the slider, and the bottom end of the spring 1 is fixedly connected to the inner bottom surface of the slide groove, and a separation component for pushing the snap-in block to move downward is provided on the contact block.

[0010] By adopting the above technical solution, after the cable is placed between the rotating wheel and the driving wheel, the positioning block is rotated to move the connecting block above the contact block so that the snap-in groove is aligned with the snap-in groove. The snap-in block moves upward under the elastic force of spring 1 and is inserted into the snap-in groove, thereby realizing the snap-in fixation of the connecting block and the contact block.

[0011] Preferably, the separation component includes a pushing block, a pushing groove is provided on the side of the contact block, and the pushing block slides with the contact block along the width direction of the contact block through the pushing groove, a transmission groove is provided on the side of the pushing groove and is connected with the pushing groove, and the contact block is slidably installed with a transmission block along its own length direction through the transmission groove, a card-connecting groove is provided on the side of the card-connecting block, and the inner bottom surface of the card-connecting groove is provided with a first slope, and the side of the transmission block close to the card-connecting block is provided with a second slope, and the relative inner sides of the transmission block and the pushing block are respectively provided with three slopes.

[0012] By adopting the above technical solution, the push block is pressed, and the push block moves the transmission block toward the direction close to the clamping block through the inclined surface three. The transmission block drives the clamping block to move downward through the inclined surfaces one and two, so that the clamping block is out of the clamping slot.

[0013] Preferably, a reset block is fixed on the side of the pushing block, and a reset groove is provided on the inner wall of the pushing groove. The reset block slides with the contact block along the width direction of the contact block through the reset groove, and a reset spring is fixed on the side of the reset block, and one end of the reset spring away from the reset block is fixedly connected to the inner wall of the reset groove.

[0014] By adopting the above technical solution, the design of the reset block and the reset spring provides the push block with an automatic reset function, simplifies the operation process, and improves ease of use.

[0015] Preferably, a sliding block is fixed on the side of the transmission block, and a sliding groove is opened on the inner wall of the transmission groove. The sliding block slides and cooperates with the contact block along the length direction of the contact block through the sliding groove. A second spring is fixed on the side of the sliding block away from the pushing block, and one end of the second spring away from the sliding block is fixedly connected to the inner wall of the sliding groove.

[0016] By adopting the above technical solution, the design of the sliding block and the second spring provides buffering and positioning functions for the transmission block, ensuring the smoothness and accuracy of sliding in the transmission groove.

[0017] Preferably, the adjustment assembly includes a screw rod rotatably installed in the adjustment groove, the adjustment block is sleeved on the outer periphery of the screw rod, the adjustment block and the screw rod are threadedly matched, a turbine is sleeved and fixed on the outer periphery of the screw rod, a worm is rotatably installed in the supporting plate, and the worm and the turbine are meshed with each other.

[0018] By adopting the above technical solution, the worm is rotated, the worm drives the turbine to rotate, and the turbine drives the two screws to rotate synchronously, thereby adjusting the height of the adjustment block, so that the adjustment block can be fine-tuned to meet different installation requirements.

[0019] Preferably, the mounting frame includes a mounting plate, four telescopic sleeves are installed on the top surface of the mounting plate, telescopic rods are fixed at the corners of the bottom surface of the supporting plate, the telescopic rods are inserted into the telescopic sleeves, a second screw is passed through the center of the mounting plate, the second screw is threadedly matched with the mounting plate, and the top end of the second screw is rotatably connected to the bottom surface of the supporting plate.

[0020] By adopting the above technical solution, the height of the carrying plate can be adjusted by rotating the second screw rod, thereby improving the adaptability and portability of the device.

[0021] Preferably, two conveying rollers are rotatably mounted on the top surface of the mounting plate, and the two conveying rollers are respectively located on two sides of the supporting plate.

[0022] By adopting the above technical solution, the design of the conveying roller helps to guide and stabilize the cable, ensuring that the cable does not deviate from the predetermined path during the lifting process, thereby ensuring the smoothness and reliability of the cable transportation.

[0023] Preferably, two abutment plates are fixed to the top surface of the mounting plate, abutment grooves are provided on the side surfaces of the abutment plates, abutment blocks are installed on the abutment plates through the abutment grooves for vertical sliding, the conveying roller is rotatably installed between the two abutment blocks, abutment springs are fixed to the bottom surface of the abutment blocks, the bottom surface of the abutment springs are fixedly connected to the inner bottom surface of the abutment grooves, abutment screws are inserted into the top surface of the abutment plates, the abutment screws are threadably matched with the abutment plates, and the bottom end of the abutment screws are rotatably connected to the abutment blocks.

[0024] By adopting the above technical solution, the abutment screw is rotated, and the abutment screw drives the abutment block to move vertically, so that the height of the conveying roller is adaptively adjusted to adapt to the height of the cable.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Place several cables in the corresponding limit ring grooves respectively, press the outer circumference of the driving wheel against the cable, start the motor, the motor drives the driving rod to rotate, the driving rod drives several synchronous wheels to rotate synchronously, and the synchronous wheels drive the cable to move, thereby realizing the automatic lifting of the transducer. The lifting speed of the transducer can be controlled by the motor, which is highly efficient and the detection result is more accurate; 2. The height of the bearing block can be fine-tuned by using the adjustment assembly to adapt to the size of the cable, and the positioning block can be rotated at the same time to facilitate the installation of the cable between the rotating wheel and the driving wheel, thereby increasing the applicability and flexibility of the device; 3. After placing the cable between the rotating wheel and the driving wheel, rotate the positioning block to move the connecting block above the contact block so that the snap-in slot is aligned with the snap-in slot. The snap-in block moves upward under the elastic force of spring 1 and is inserted into the snap-in slot, thereby achieving snap-in fixation of the connecting block and the contact block. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the automatic lifting device of the transducer of the multi-span ultrasonic detection equipment for pile foundations according to an embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram of the bearing plate and conveying rollers in the automatic lifting device of the transducer of the multi-span ultrasonic detection equipment for pile foundations in the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the installation structure of the rotating wheel and the driving wheel in the automatic lifting device of the transducer of the multi-span ultrasonic detection equipment for pile foundations in the embodiment of the present application.

[0029] Figure 4 It is a cross-sectional view of a moving plate and a moving block in an automatic lifting device for a transducer of a multi-span ultrasonic detection device for foundation piles according to an embodiment of the present application.

[0030] Figure 5 It is a cross-sectional view of a connecting block and a contact block in an automatic lifting device for a transducer of a multi-span ultrasonic detection device for foundation piles according to an embodiment of the present application.

[0031] Figure 6 It is a cross-sectional view of a contact block in an automatic lifting device for a transducer of a multi-span ultrasonic detection device for foundation piles according to an embodiment of the present application.

[0032] Figure numerals: 1, mounting frame; 11, mounting plate; 12, triangular bracket; 13, telescopic sleeve; 14, screw rod 2; 2, bearing plate; 21, telescopic rod; 22, bearing block; 23, rotating rod; 24, rotating wheel; 241, limiting ring groove; 25, adjusting groove; 26, adjusting block; 261, fixing block; 2611, cylinder; 262, contact block; 27, screw rod 1; 28, turbine; 29, worm; 3, conveying roller; 31, abutment plate; 32, abutment groove; 33, abutment block; 34, abutment spring; 35, abutment screw; 4 , moving plate; 41, moving block; 411, positioning block; 412, connecting block; 4121, card slot; 42, driving rod; 43, motor; 44, driving wheel; 5, card block; 51, card slot; 52, sliding block; 53, sliding slot; 54, spring one; 55, card slot; 56, inclined plane one; 6, pushing block; 61, pushing slot; 62, reset block; 63, reset slot; 64, reset spring; 7, transmission block; 71, transmission slot; 72, sliding block; 73, sliding slot; 74, spring two; 75, inclined plane two; 76, inclined plane three. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-6 This application is described in further detail.

[0034] The present application embodiment discloses an automatic lifting device for a transducer of a pile multi-span hole ultrasonic detection equipment. Figure 1 and Figure 2The automatic lifting device for the transducer of the pile multi-span hole ultrasonic detection equipment includes a mounting frame 1 and a bearing plate 2. The mounting frame 1 includes a horizontally arranged mounting plate 11 and a triangular bracket 12 installed on the bottom surface of the mounting plate 11. Telescopic rods 21 are fixed at the corners of the bottom surface of the bearing plate 2. Four telescopic sleeves 13 are installed on the top surface of the mounting plate 11. The telescopic rods 21 are inserted into the telescopic sleeves 13. A screw rod 14 is passed through the center of the mounting plate 11. The screw rod 14 is threadedly matched with the mounting plate 11. The top end of the screw rod 14 is rotatably connected to the bottom surface of the bearing plate 2. The height of the bearing plate 2 can be adjusted by rotating the screw rod 14.

[0035] Reference Figure 2 , Figure 3 and Figure 4 Two bearing blocks 22 are fixed on the top surface of the bearing plate 2, and a rotating rod 23 is rotatably installed between the two bearing blocks 22. Four rotating wheels 24 arranged at equal intervals are sleeved and fixed on the outer circumference of the rotating rod 23, and a limiting ring groove 241 for placing cables is provided on the outer circumference of the rotating wheel 24. Two conveying rollers 3 are rotatably installed on the top surface of the mounting plate 11, and the two conveying rollers 3 are respectively located on both sides of the bearing plate 2. Two abutment plates 31 are fixed on the top surface of the mounting plate 11, and abutment grooves 32 are respectively provided on the opposite inner sides of the two abutment plates 31. Abutment blocks 33 are installed on the abutment plates 31 along the vertical sliding direction through the abutment grooves 32, and the conveying rollers 3 are rotatably installed between the two abutment blocks 33. An abutment spring 34 is fixed to the bottom surface of the abutment block 33, and the bottom surface of the abutment spring 34 is fixedly connected to the inner bottom surface of the abutment groove 32. An abutment screw 35 is inserted into the top surface of the abutment plate 31, and the abutment screw 35 is threadedly matched with the abutment plate 31, and the bottom end of the abutment screw 35 is rotatably connected with the abutment block 33. The abutment screw 35 is rotated to drive the abutment block 33 to move vertically, thereby adaptively adjusting the height of the conveying roller 3 to adapt to the height of the cable.

[0036] Reference Figure 3 and Figure 4 A moving plate 4 is installed on the top of the carrier plate 2, and two moving blocks 41 are fixed on the bottom of the moving plate 4. A driving rod 42 is rotatably installed between the two moving blocks 41. A motor 43 is installed on the side of one of the moving blocks 41, and the output end of the motor 43 is fixedly connected to the end of the driving rod 42. Four driving wheels 44 are fixedly sleeved on the outer circumference of the driving rod 42, and the driving wheels 44 correspond to the rotating wheels 24 one by one. The outer circumference of the driving wheel 44 can abut against the cable and drive the cable to move.

[0037] Reference Figure 3 and Figure 4, the top surface of the bearing block 22 is provided with an adjustment groove 25, and the bearing block 22 is vertically slidably installed with an adjustment block 26 through the adjustment groove 25. A vertically arranged screw rod 27 is rotatably installed in the adjustment groove 25, and the adjustment block 26 is sleeved on the outer periphery of the screw rod 27, and the adjustment block 26 and the screw rod 27 are threadedly matched. , A turbine 28 is sleeved and fixed on the outer periphery of the screw rod 27, and a worm 29 is rotatably installed in the bearing plate 2, and the worm 29 and the turbine 28 are meshed with each other. The two moving blocks 41 are respectively a positioning block 411 and a connecting block 412, and the two adjusting blocks 26 are respectively a fixed block 261 and a contact block 262. A cylinder 2611 is fixed on the top surface of the fixed block 261, and the positioning block 411 is sleeved on the outer periphery of the cylinder 2611, and the positioning block 411 is rotatably connected with the cylinder 2611.

[0038] Reference Figure 4 and Figure 5 The top surface of the contact block 262 is provided with two clamping grooves 51, and the contact block 262 is installed with the clamping block 5 by sliding along the vertical direction through the clamping grooves 51. The bottom surface of the connection block 412 is provided with a clamping groove 4121 for inserting the clamping block 5. A slider 52 is fixed on the side of the clamping block 5, and a slide groove 53 is provided on the inner wall of the clamping groove 51. The slider 52 is slidably matched with the contact block 262 in the vertical direction through the slide groove 53. A spring 1 54 is fixed on the bottom surface of the slider 52, and the bottom end of the spring 1 54 is fixedly connected to the inner bottom surface of the slide groove 53.

[0039] After placing the cable between the rotating wheel 24 and the driving wheel 44, rotate the positioning block 411 so that the connecting block 412 moves above the contact block 262, so that the snap-in groove 51 is aligned with the snap-in groove 4121, and the snap-in block 5 moves upward under the elastic force of the spring 54 and is inserted into the snap-in groove 4121, thereby realizing the snap-in fixation of the connecting block 412 and the contact block 262.

[0040] Reference Figure 5 and Figure 6, a push groove 61 is provided on the side of the contact block 262, and the contact block 262 is slidably installed with the push block 6 through the push groove 61 along the width direction of itself. A reset block 62 is fixed on the side of the push block 6, and a reset groove 63 is provided on the inner wall of the push groove 61, and the reset block 62 is slidably matched with the contact block 262 along the width direction of the contact block 262 through the reset groove 63. A reset spring 64 is fixed on the side of the reset block 62, and one end of the reset spring 64 away from the reset block 62 is fixedly connected to the inner wall of the reset groove 63. A transmission groove 71 connected to the push groove 61 is provided on the side of the push groove 61, and the contact block 262 is slidably installed with the transmission block 7 along the length direction of itself through the transmission groove 71. A sliding block 72 is fixed on the side of the transmission block 7, and a sliding groove 73 is provided on the inner wall of the transmission groove 71, and the sliding block 72 is slidably matched with the contact block 262 along the length direction of the contact block 262 through the sliding groove 73. A second spring 74 is fixed to the side of the sliding block 72 away from the pushing block 6, and one end of the second spring 74 away from the sliding block 72 is fixedly connected to the inner wall of the sliding groove 73. A card-connecting groove 55 for inserting the transmission block 7 is provided on the side of the clamping block 5, and an inclined surface 1 56 is provided on the inner bottom surface of the card-connecting groove 55. A second inclined surface 75 is provided on the side of the transmission block 7 close to the clamping block 5, and three inclined surfaces 76 are provided on the opposite inner sides of the transmission block 7 and the pushing block 6.

[0041] Press the push block 6, and the push block 6 moves the transmission block 7 toward the direction close to the clamping block 5 through the inclined surface 3 76. The transmission block 7 drives the clamping block 5 to move downward through the inclined surface 1 56 and the inclined surface 2 75, so that the clamping block 5 is disengaged from the clamping slot 4121, so as to facilitate the installation and disassembly of the cable.

[0042] The implementation principle of the automatic lifting device of the transducer of the multi-span ultrasonic detection equipment for pile foundations in the embodiment of the present application is as follows: the cables of the four transducers are respectively placed in the corresponding limiting ring grooves 241, the outer peripheral surface of the driving wheel 44 is pressed against the cable, the motor 43 is started, the motor 43 drives the driving rod 42 to rotate, the driving rod 42 drives several synchronous wheels to rotate synchronously, and the synchronous wheel drives the cable to move, thereby realizing the automatic lifting of the transducer. The lifting speed of the transducer can be controlled by the motor 43, the efficiency is high, and the detection result is more accurate.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic lifting device for transducer of ultrasonic testing equipment for pile foundation multi-span holes, characterized by: The invention comprises a mounting frame (1), a bearing plate (2) is mounted on the mounting frame (1), two bearing blocks (22) are fixed on the top surface of the bearing plate (2), a rotating rod (23) is rotatably mounted between the two bearing blocks (22), a plurality of rotating wheels (24) are sleeved and fixed on the outer circumference of the rotating rod (23), a limiting ring groove (241) for placing cables is formed on the outer circumference of the rotating wheel (24), a movable plate (4) is mounted on the top of the bearing plate (2), and the bottom surface of the movable plate (4) is fixed There are two moving blocks (41), a driving rod (42) is rotatably mounted between the two moving blocks (41), a motor (43) is mounted on the side of one of the moving blocks (41), the output end of the motor (43) is fixedly connected to the end of the driving rod (42), a plurality of driving wheels (44) are sleeved and fixedly mounted on the outer circumference of the driving rod (42), the driving wheels (44) correspond to the rotating wheels (24) one by one, and the outer circumference of the driving wheels (44) can abut against the cable and drive the cable to move.

2. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 1 is characterized by: The top surface of the bearing block (22) is provided with an adjustment groove (25), and the bearing block (22) is provided with an adjustment block (26) through the adjustment groove (25) for vertical sliding movement. The bearing block (22) is provided with an adjustment component for adjusting the position of the adjustment block (26), the two movable blocks (41) are respectively a positioning block (411) and a connecting block (412), the two adjustment blocks (26) are respectively a fixed block (261) and a contact block (262), a cylinder (2611) is fixed on the top surface of the fixed block (261), the positioning block (411) is sleeved on the outer circumference of the cylinder (2611), the positioning block (411) is rotatably connected to the cylinder (2611), and the connecting block (412) is detachably connected to the contact block (262).

3. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 2 is characterized by: The top surface of the contact block (262) is provided with two engaging grooves (51), and the contact block (262) is installed with an engaging block (5) by sliding vertically through the engaging grooves (51); the bottom surface of the connection block (412) is provided with an engaging groove (4121) for inserting the engaging block (5); a slider (52) is fixed on the side of the engaging block (5); a slide groove (53) is provided on the inner wall of the engaging groove (51); the slider (52) is slidably matched with the contact block (262) in the vertical direction through the slide groove (53); a spring (54) is fixed on the bottom surface of the slider (52); the bottom end of the spring (54) is fixedly connected to the inner bottom surface of the slide groove (53); and a separation component for pushing the engaging block (5) to move downward is provided on the contact block (262).

4. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 3 is characterized by: The separation component comprises a pushing block (6), a pushing groove (61) is provided on the side of the contact block (262), the pushing block (6) is slidably matched with the contact block (262) along the width direction of the contact block (262) through the pushing groove (61), a transmission groove (71) connected to the pushing groove (61) is provided on the side of the pushing groove (61), the contact block (262) is slidably installed with a transmission block (7) along its own length direction through the transmission groove (71), a card connection groove (55) is provided on the side of the clamping block (5), the inner bottom surface of the card connection groove (55) is provided with a first inclined surface (56), the side of the transmission block (7) close to the clamping block (5) is provided with a second inclined surface (75), and the relative inner sides of the transmission block (7) and the pushing block (6) are respectively provided with a third inclined surface (76).

5. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 4 is characterized by: A reset block (62) is fixed on the side of the pushing block (6), a reset groove (63) is provided on the inner wall of the pushing groove (61), the reset block (62) is slidably matched with the contact block (262) along the width direction of the contact block (262) through the reset groove (63), a reset spring (64) is fixed on the side of the reset block (62), and one end of the reset spring (64) away from the reset block (62) is fixedly connected to the inner wall of the reset groove (63).

6. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 4 is characterized by: A sliding block (72) is fixed on the side of the transmission block (7), and a sliding groove (73) is provided on the inner wall of the transmission groove (71). The sliding block (72) slides and cooperates with the contact block (262) along the length direction of the contact block (262) through the sliding groove (73). A second spring (74) is fixed on the side of the sliding block (72) away from the pushing block (6), and one end of the second spring (74) away from the sliding block (72) is fixedly connected to the inner wall of the sliding groove (73).

7. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 2 is characterized by: The adjustment assembly comprises a screw rod (27) rotatably mounted in the adjustment groove (25); the adjustment block (26) is sleeved on the outer periphery of the screw rod (27); the adjustment block (26) and the screw rod (27) are threadedly matched; a turbine (28) is sleeved and fixed on the outer periphery of the screw rod (27); a worm (29) is rotatably mounted in the carrier plate (2); the worm (29) and the turbine (28) are meshed with each other.

8. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 1 is characterized by: The mounting frame (1) comprises a mounting plate (11), the top surface of which is mounted four telescopic sleeves (13), the bottom corners of the supporting plate (2) are all fixed with telescopic rods (21), the telescopic rods (21) are inserted into the telescopic sleeves (13), a second screw rod (14) is passed through the center of the mounting plate (11), the second screw rod (14) is threadedly matched with the mounting plate (11), and the top end of the second screw rod (14) is rotatably connected to the bottom surface of the supporting plate (2).

9. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 8 is characterized by: Two conveying rollers (3) are rotatably mounted on the top surface of the mounting plate (11), and the two conveying rollers (3) are respectively located on two sides of the carrying plate (2).

10. The automatic transducer lifting device for ultrasonic testing equipment for pile foundation multi-span holes according to claim 9, characterized in that: Two abutment plates (31) are fixed on the top surface of the mounting plate (11), and an abutment groove (32) is provided on the side surface of the abutment plate (31). An abutment block (33) is installed on the abutment plate (31) through the abutment groove (32) for vertical sliding movement. The conveying roller (3) is rotatably installed between the two abutment blocks (33). An abutment spring (34) is fixed on the bottom surface of the abutment block (33), and the bottom surface of the abutment spring (34) is fixedly connected to the inner bottom surface of the abutment groove (32). An abutment screw (35) is inserted on the top surface of the abutment plate (31), and the abutment screw (35) is threadedly matched with the abutment plate (31), and the bottom end of the abutment screw (35) is rotatably connected to the abutment block (33).

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